fully implemented conference membership management and delete conference -

now almost all the conference functionality is in place

TODO

@@ -31,12 +31,9 @@ Lots!
 - Functions still to do on conferencing "topics" page:
   Add Conference To Hotlist
 
-- Functions still to do on "manage conference" page:
-  Manage members
-  Delete conference
-
 - We need a "manage" button at conference list level so we can use that to
-  manage the ordering of conferences.
+  manage the ordering of conferences.  This operation should be accessible
+  only to users with "create" privilege on the SIG.
 
 - Implement conference hotlist for users.
 

setup/database.sql

@@ -35,7 +35,10 @@ USE venice;
 # in the XML config file.  This table has ONLY ONE ROW!
 CREATE TABLE globals (
     posts_per_page INT NOT NULL,
-    old_posts_at_top INT NOT NULL
+    old_posts_at_top INT NOT NULL,
+    max_search_page INT NOT NULL,
+    max_sig_mbr_page INT NOT NULL,
+    max_conf_mbr_page INT NOT NULL
 );
 
 # The audit records table.  Most "major" events add a record to this table.
@@ -429,6 +432,7 @@ INSERT INTO refaudit (type, descr) VALUES
     (312,     'Scribble Message'),
     (313,     'Nuke Message'),
     (314,     'Upload Message Attachment'),
+    (315,     'Delete Conference'),
     (9999999, 'DUMMY');
 
 # The ISO 3166 two-letter country codes.  Source is
@@ -1291,8 +1295,8 @@ INSERT INTO refsigftr (ftr_code, is_default, is_locked, is_hidden, require_read,
 ##############################################################################
 
 # Initialize the system globals table.
-INSERT INTO globals (posts_per_page, old_posts_at_top)
-    VALUES (20, 2);
+INSERT INTO globals (posts_per_page, old_posts_at_top, max_search_page, max_sig_mbr_page, max_conf_mbr_page)
+    VALUES (20, 2, 20, 50, 50);
 
 # Add the 'Anonymous Honyak' user to the users table.
 # (Do 'SELECT * FROM users WHERE is_anon = 1' to retrieve the AC user details.)

src/com/silverwrist/util/ParallelRunQueue.java

@@ -0,0 +1,101 @@
+/*
+ * The contents of this file are subject to the Mozilla Public License Version 1.1
+ * (the "License"); you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at <http://www.mozilla.org/MPL/>.
+ * 
+ * Software distributed under the License is distributed on an "AS IS" basis, WITHOUT
+ * WARRANTY OF ANY KIND, either express or implied. See the License for the specific
+ * language governing rights and limitations under the License.
+ * 
+ * The Original Code is the Venice Web Communities System.
+ * 
+ * The Initial Developer of the Original Code is Eric J. Bowersox <erbo@silcom.com>,
+ * for Silverwrist Design Studios.  Portions created by Eric J. Bowersox are
+ * Copyright (C) 2001 Eric J. Bowersox/Silverwrist Design Studios.  All Rights Reserved.
+ * 
+ * Contributor(s): 
+ */
+package com.silverwrist.util;
+
+import java.util.Vector;
+
+public class ParallelRunQueue implements Runnable
+{
+  /*--------------------------------------------------------------------------------
+   * Attributes
+   *--------------------------------------------------------------------------------
+   */
+
+  private Thread[] thrds;
+  private Vector queue;
+  private int priority;
+
+  /*--------------------------------------------------------------------------------
+   * Constructor
+   *--------------------------------------------------------------------------------
+   */
+
+  public ParallelRunQueue(int nthread)
+  {
+    thrds = new Thread[nthread];
+    for (int i=0; i<nthread; i++)
+      thrds[i] = null;
+    queue = new Vector();
+    priority = Thread.currentThread().getPriority();
+
+  } // end constructor
+
+  /*--------------------------------------------------------------------------------
+   * Implementations from interface Runnable
+   *--------------------------------------------------------------------------------
+   */
+
+  public void run()
+  {
+    while (queue.size()>0)
+    { // unqueue a new Runnable
+      Runnable r = (Runnable)(queue.remove(0));
+      for (int i=0; i<thrds.length; i++)
+      { // scan through our threads list...
+	if ((thrds[i]==null) || !(thrds[i].isAlive()))
+	{ // a worker thread is available - start it running
+	  thrds[i] = new Thread(r);
+	  thrds[i].setPriority(priority);
+	  thrds[i].start();
+	  return;
+
+	} // end if
+
+      } // end for
+
+      r.run();  // if all else fails, run it ourselves
+
+    } // end while
+
+  } // end run
+
+  /*--------------------------------------------------------------------------------
+   * External operations
+   *--------------------------------------------------------------------------------
+   */
+
+  public void queue(Runnable r)
+  {
+    for (int i=0; i<thrds.length; i++)
+    { // scan through our threads list...
+      if ((thrds[i]==null) || !(thrds[i].isAlive()))
+      { // a worker thread is available - start it running
+	thrds[i] = new Thread(r);
+	thrds[i].setPriority(priority);
+	thrds[i].start();
+	return;
+
+      } // end if
+
+    } // end for
+
+    queue.add(r);  // if all else fails, queue it up
+
+  } // end queue
+
+} // end class ParallelRunQueue

src/com/silverwrist/venice/core/ConferenceContext.java

@@ -84,6 +84,8 @@ public interface ConferenceContext
 
   public abstract void removeAlias(String alias) throws DataException, AccessError;
 
+  public abstract void setMembership(int uid, int grant_level) throws DataException, AccessError;
+
   public abstract void addMember(int uid, boolean as_host) throws DataException, AccessError;
 
   public abstract void removeMember(int uid) throws DataException, AccessError;
@@ -117,18 +119,26 @@ public interface ConferenceContext
 
   public abstract HTMLChecker getNewTopicPreviewChecker();
 
-  public abstract void fixSeen() throws DataException;
+  public abstract void fixSeen() throws DataException, AccessError;
 
-  public abstract List getActivePosters(int skip, int limit) throws DataException;
+  public abstract List getActivePosters(int skip, int limit) throws DataException, AccessError;
 
-  public abstract List getActivePosters(int limit) throws DataException;
+  public abstract List getActivePosters(int limit) throws DataException, AccessError;
 
-  public abstract List getActivePosters() throws DataException;
+  public abstract List getActivePosters() throws DataException, AccessError;
 
-  public abstract List getActiveReaders(int skip, int limit) throws DataException;
+  public abstract List getActiveReaders(int skip, int limit) throws DataException, AccessError;
 
-  public abstract List getActiveReaders(int limit) throws DataException;
+  public abstract List getActiveReaders(int limit) throws DataException, AccessError;
 
-  public abstract List getActiveReaders() throws DataException;
+  public abstract List getActiveReaders() throws DataException, AccessError;
+
+  public abstract List getMemberList() throws DataException, AccessError;
+
+  public abstract int getMemberLevel(int uid) throws DataException, AccessError;
+
+  public abstract void delete() throws DataException, AccessError;
+
+  public abstract boolean canDeleteConference();
 
 } // end interface ConferenceContext

src/com/silverwrist/venice/core/SIGContext.java

@@ -7,7 +7,7 @@
  * WARRANTY OF ANY KIND, either express or implied. See the License for the specific
  * language governing rights and limitations under the License.
  * 
- * The Original Code is the Venice Web Community System.
+ * The Original Code is the Venice Web Communities System.
  * 
  * The Initial Developer of the Original Code is Eric J. Bowersox <erbo@silcom.com>,
  * for Silverwrist Design Studios.  Portions created by Eric J. Bowersox are
@@ -21,7 +21,7 @@ import java.util.BitSet;
 import java.util.Date;
 import java.util.List;
 
-public interface SIGContext
+public interface SIGContext extends SearchMode
 {
   public static final int HIDE_NONE = 0;
   public static final int HIDE_DIRECTORY = 1;
@@ -144,4 +144,11 @@ public interface SIGContext
 
   public abstract boolean canCreateConference();
 
+  public abstract List searchForMembers(int field, int mode, String term, int offset, int count)
+      throws DataException;
+
+  public abstract int getSearchMemberCount(int field, int mode, String term) throws DataException;
+
+  public abstract List getMemberList() throws DataException;
+
 } // end interface SIGContext

src/com/silverwrist/venice/core/UserFound.java

@@ -37,4 +37,6 @@ public interface UserFound
 
   public abstract int getLevel();
 
+  public abstract UserFound createNewLevel(int level);
+
 } // end interface UserFound

src/com/silverwrist/venice/core/VeniceEngine.java

@@ -67,4 +67,8 @@ public interface VeniceEngine extends SearchMode
 
   public abstract int getNumOldPostsBeforeNew();
 
+  public abstract int getMaxNumConferenceMembersDisplay();
+
+  public abstract int getMaxNumSIGMembersDisplay();
+
 } // end interface VeniceEngine

src/com/silverwrist/venice/core/impl/BackgroundConferencePurge.java

@@ -0,0 +1,131 @@
+/*
+ * The contents of this file are subject to the Mozilla Public License Version 1.1
+ * (the "License"); you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at <http://www.mozilla.org/MPL/>.
+ * 
+ * Software distributed under the License is distributed on an "AS IS" basis, WITHOUT
+ * WARRANTY OF ANY KIND, either express or implied. See the License for the specific
+ * language governing rights and limitations under the License.
+ * 
+ * The Original Code is the Venice Web Communities System.
+ * 
+ * The Initial Developer of the Original Code is Eric J. Bowersox <erbo@silcom.com>,
+ * for Silverwrist Design Studios.  Portions created by Eric J. Bowersox are
+ * Copyright (C) 2001 Eric J. Bowersox/Silverwrist Design Studios.  All Rights Reserved.
+ * 
+ * Contributor(s): 
+ */
+package com.silverwrist.venice.core.impl;
+
+import java.sql.*;
+import org.apache.log4j.*;
+import com.silverwrist.util.ParallelRunQueue;
+import com.silverwrist.venice.db.*;
+import com.silverwrist.venice.core.InternalStateError;
+
+class BackgroundConferencePurge implements Runnable
+{
+  /*--------------------------------------------------------------------------------
+   * Static data members
+   *--------------------------------------------------------------------------------
+   */
+
+  private static Category logger = Category.getInstance(BackgroundConferencePurge.class.getName());
+
+  /*--------------------------------------------------------------------------------
+   * Attributes
+   *--------------------------------------------------------------------------------
+   */
+
+  private DataPool datapool;
+  private int confid;
+  private int num_topics;
+  private int max_topicid;
+
+  /*--------------------------------------------------------------------------------
+   * Constructor
+   *--------------------------------------------------------------------------------
+   */
+
+  BackgroundConferencePurge(DataPool datapool, int confid, int num_topics, int max_topicid)
+  {
+    this.datapool = datapool;
+    this.confid = confid;
+    this.num_topics = num_topics;
+    this.max_topicid = max_topicid;
+
+  } // end constructor
+
+  /*--------------------------------------------------------------------------------
+   * Implementations from interface Runnable
+   *--------------------------------------------------------------------------------
+   */
+
+  public void run()
+  {
+    if (logger.isDebugEnabled())
+      logger.debug("BackgroundConferencePurge running on conference #" + confid);
+
+    Connection conn = null;  // pooled database connection
+    ParallelRunQueue rq = new ParallelRunQueue(2);
+
+    try
+    { // get a database connection from the pool
+      conn = datapool.getConnection();
+      Statement stmt = conn.createStatement();
+
+      // purge out some auxiliary tables first
+      stmt.executeUpdate("DELETE FROM confmember WHERE confid = " + confid + ";");
+      stmt.executeUpdate("DELETE FROM confsettings WHERE confid = " + confid + ";");
+      stmt.executeUpdate("DELETE FROM confhotlist WHERE confid = " + confid + ";");
+      stmt.executeUpdate("DELETE FROM confbozo WHERE confid = " + confid + ";");
+
+      // look up all the topic IDs that are present in this conference
+      int[] topicids = new int[num_topics];
+      StringBuffer sql = new StringBuffer("SELECT topicid FROM topics WHERE confid = ");
+      sql.append(confid).append(" AND topicid <= ").append(max_topicid).append(" ORDER BY topicid;");
+      ResultSet rs = stmt.executeQuery(sql.toString());
+      int topics = 0;
+      while (rs.next())
+	topicids[topics++] = rs.getInt(1);
+
+      for (int i=0; i<topics; i++)
+      { // delete the topic header and settings rows first
+	stmt.executeUpdate("DELETE FROM topics WHERE topicid = " + topicids[i] + ";");
+	stmt.executeUpdate("DELETE FROM topicsettings WHERE topicid = " + topicids[i] + ";");
+
+	// figure out how many posts are in this topic and create a BackgroundTopicPurge.
+	sql.setLength(0);
+	sql.append("SELECT COUNT(*), MAX(postid) FROM posts WHERE topicid = ").append(topicids[i]).append(';');
+	rs = stmt.executeQuery(sql.toString());
+	if (!(rs.next()))
+	  throw new InternalStateError("BackgroundConferencePurge.run screwup on post SELECT");
+	rq.queue(new BackgroundTopicPurge(datapool,topicids[i],rs.getInt(1),rs.getLong(2)));
+
+      } // end for
+
+      if (logger.isDebugEnabled())
+	logger.debug("BackgroundConferencePurge basic delete complete for conf #" + confid);
+
+    } // end try
+    catch (SQLException e)
+    { // on an error, just die
+      logger.error("BackgroundConferencePurge FATAL EXCEPTION purging #" + confid + ": " + e.getMessage(),e);
+      return;
+
+    } // end catch
+    finally
+    { // make sure we release the connection before we go
+      if (conn!=null)
+	datapool.releaseConnection(conn);
+
+    } // end finally
+
+    rq.run();  // now run the parallel queue to finish processing
+
+    if (logger.isDebugEnabled())
+      logger.debug("BackgroundConferencePurge COMPLETE for conf #" + confid);
+
+  } // end run
+
+} // end class BackgroundConferencePurge

src/com/silverwrist/venice/core/impl/ConferenceCoreData.java

@@ -57,6 +57,7 @@ class ConferenceCoreData implements ConferenceData
   private String description;              // the conference's description
   private String cached_alias = null;      // the cached alias (for getAnAlias)
   private boolean creating_topic = false;  // is somebody creating a topic?
+  private boolean deleted = false;         // has this conference been deleted?
 
   /*--------------------------------------------------------------------------------
    * Constructors
@@ -66,7 +67,7 @@ class ConferenceCoreData implements ConferenceData
   ConferenceCoreData(EngineBackend engine, DataPool datapool, int confid) throws DataException
   {
     if (logger.isDebugEnabled())
-      logger.debug("new ConferenceCoreData for conference " + String.valueOf(confid));
+      logger.debug("new ConferenceCoreData for conference " + confid);
     this.engine = engine;
     this.datapool = datapool;
     this.confid = confid;
@@ -83,7 +84,7 @@ class ConferenceCoreData implements ConferenceData
       sql.append(confid).append(';');
       ResultSet rs = stmt.executeQuery(sql.toString());
       if (!(rs.next()))
-	throw new DataException("Conference #" + String.valueOf(confid) + " does not exist in the database.");
+	throw new DataException("Conference #" + confid + " does not exist in the database.");
 
       loadData(rs);  // load the conference data
 
@@ -107,7 +108,7 @@ class ConferenceCoreData implements ConferenceData
 			       boolean pvt, String name, String descr)
   {
     if (logger.isDebugEnabled())
-      logger.debug("new ConferenceCoreData for NEW conference " + String.valueOf(confid));
+      logger.debug("new ConferenceCoreData for NEW conference " + confid);
     this.engine = engine;
     this.datapool = datapool;
     this.confid = confid;
@@ -221,6 +222,9 @@ class ConferenceCoreData implements ConferenceData
 
   public List getAliases() throws DataException
   {
+    if (deleted)
+      throw new DataException("This conference has been deleted.");
+
     Connection conn = null;
     Vector rc = new Vector();
 
@@ -258,6 +262,9 @@ class ConferenceCoreData implements ConferenceData
 
   public List getHosts() throws DataException
   {
+    if (deleted)
+      throw new DataException("This conference has been deleted.");
+
     Connection conn = null;
     Vector rc = new Vector();
 
@@ -304,24 +311,32 @@ class ConferenceCoreData implements ConferenceData
 
   public boolean canReadConference(int level)
   {
+    if (deleted)
+      return false;
     return (level>=read_level);
 
   } // end canReadConference
     
   public boolean canPostToConference(int level)
   {
+    if (deleted)
+      return false;
     return (level>=post_level);
 
   } // end canReadConference
 
   public boolean canCreateTopic(int level)
   {
+    if (deleted)
+      return false;
     return (level>=create_level);
 
   } // end canCreateTopic
 
   public boolean canChangeConference(int level)
   {
+    if (deleted)
+      return false;
     return (level>=change_level);
 
   } // end canChangeConference
@@ -371,6 +386,9 @@ class ConferenceCoreData implements ConferenceData
   public synchronized void setSecurityLevels(SIGBackend sig, int read, int post, int create, int hide,
 					     int nuke, int change, int delete) throws DataException
   {
+    if (deleted)
+      throw new DataException("This conference has been deleted.");
+
     Connection conn = null;  // database connection
     AuditRecord ar = null;   // audit record
       
@@ -402,7 +420,7 @@ class ConferenceCoreData implements ConferenceData
 
       // create an audit record reflecting the change
       ar = new AuditRecord(AuditRecord.CONF_SECURITY,sig.realUID(),sig.userRemoteAddress(),sig.realSIGID(),
-			   "conf=" + String.valueOf(confid));
+			   "conf=" + confid);
 
     } // end try
     catch (SQLException e)
@@ -434,6 +452,9 @@ class ConferenceCoreData implements ConferenceData
 
   public synchronized void setName(SIGBackend sig, String val) throws DataException
   {
+    if (deleted)
+      throw new DataException("This conference has been deleted.");
+
     Connection conn = null;  // database connection
     AuditRecord ar = null;   // audit record
       
@@ -457,7 +478,7 @@ class ConferenceCoreData implements ConferenceData
 
       // create an audit record reflecting the change
       ar = new AuditRecord(AuditRecord.CONF_SECURITY,sig.realUID(),sig.userRemoteAddress(),sig.realSIGID(),
-			   "conf=" + String.valueOf(confid));
+			   "conf=" + confid);
 
     } // end try
     catch (SQLException e)
@@ -489,6 +510,9 @@ class ConferenceCoreData implements ConferenceData
 
   public synchronized void setDescription(String val) throws DataException
   {
+    if (deleted)
+      throw new DataException("This conference has been deleted.");
+
     Connection conn = null;  // database connection
       
     try
@@ -526,6 +550,9 @@ class ConferenceCoreData implements ConferenceData
 
   public synchronized void addAlias(SIGBackend sig, String alias) throws DataException
   {
+    if (deleted)
+      throw new DataException("This conference has been deleted.");
+
     Connection conn = null;  // database connection
     AuditRecord ar = null;   // audit record
       
@@ -566,7 +593,7 @@ class ConferenceCoreData implements ConferenceData
       // set the database's update date and generate a new audit record
       touchUpdate(conn);
       ar = new AuditRecord(AuditRecord.CONF_ALIAS,sig.realUID(),sig.userRemoteAddress(),sig.realSIGID(),
-			   "conf=" + String.valueOf(confid),"add=" + alias);
+			   "conf=" + confid,"add=" + alias);
     
     } // end try
     catch (SQLException e)
@@ -598,6 +625,9 @@ class ConferenceCoreData implements ConferenceData
 
   public synchronized void removeAlias(SIGBackend sig, String alias) throws DataException
   {
+    if (deleted)
+      throw new DataException("This conference has been deleted.");
+
     Connection conn = null;  // database connection
     AuditRecord ar = null;   // audit record
       
@@ -651,7 +681,7 @@ class ConferenceCoreData implements ConferenceData
 	if ((cached_alias!=null) && cached_alias.equals(alias))
 	  cached_alias = null;  // also release the cached alias and force a re-get
 	ar = new AuditRecord(AuditRecord.CONF_ALIAS,sig.realUID(),sig.userRemoteAddress(),sig.realSIGID(),
-			     "conf=" + String.valueOf(confid),"remove=" + alias);
+			     "conf=" + confid,"remove=" + alias);
 
       } // end if
     
@@ -685,6 +715,9 @@ class ConferenceCoreData implements ConferenceData
 
   public synchronized void setMembership(SIGBackend sig, int uid, int grant_level) throws DataException
   {
+    if (deleted)
+      throw new DataException("This conference has been deleted.");
+
     Connection conn = null;  // database connection
     AuditRecord ar = null;   // audit record
       
@@ -742,8 +775,7 @@ class ConferenceCoreData implements ConferenceData
       { // set the database's update date and generate a new audit record
 	touchUpdate(conn);
 	ar = new AuditRecord(AuditRecord.CONF_MEMBERSHIP,sig.realUID(),sig.userRemoteAddress(),sig.realSIGID(),
-			     "conf=" + String.valueOf(confid),"uid=" + String.valueOf(uid),
-			     "level=" + String.valueOf(grant_level));
+			     "conf=" + confid,"uid=" + uid,"level=" + grant_level);
 
       } // end if
     
@@ -777,12 +809,17 @@ class ConferenceCoreData implements ConferenceData
 
   public boolean canHideTopics(int level)
   {
+    if (deleted)
+      return false;
     return (level>=hide_level);
 
   } // end canHideTopics
 
   public synchronized String getAnAlias() throws DataException
   {
+    if (deleted)
+      throw new DataException("This conference has been deleted.");
+
     if (cached_alias!=null)
       return cached_alias;
 
@@ -821,6 +858,9 @@ class ConferenceCoreData implements ConferenceData
   public synchronized ReturnTopicInfo createNewTopic(SIGBackend sig, String title, String pseud,
 						     String body, int body_lines) throws DataException
   {
+    if (deleted)
+      throw new DataException("This conference has been deleted.");
+
     Connection conn = null;    // database connection
     AuditRecord ar = null;     // audit record
     short new_topic_num;       // sequential number of the new topic
@@ -891,8 +931,7 @@ class ConferenceCoreData implements ConferenceData
 
 	// create an audit record indicating we were successful
 	ar = new AuditRecord(AuditRecord.CREATE_TOPIC,sig.realUID(),sig.userRemoteAddress(),sig.realSIGID(),
-			     "confid=" + String.valueOf(confid),"num=" + String.valueOf(new_topic_num),
-			     "title=" + title);
+			     "confid=" + confid,"num=" + new_topic_num,"title=" + title);
 
       } // end try
       finally
@@ -935,18 +974,25 @@ class ConferenceCoreData implements ConferenceData
 
   public boolean canScribblePosts(int level)
   {
+    if (deleted)
+      return false;
     return (level>=nuke_level);
 
   } // end canScribblePosts
 
   public boolean canNukePosts(int level)
   {
+    if (deleted)
+      return false;
     return (level>=nuke_level);
 
   } // end canNukePosts
 
   public synchronized void touchUpdate(Connection conn, java.util.Date date) throws DataException
   {
+    if (deleted)
+      throw new DataException("This conference has been deleted.");
+
     try
     { // update the last update date
       Statement stmt = conn.createStatement();
@@ -998,6 +1044,207 @@ class ConferenceCoreData implements ConferenceData
 
   } // end getTopTopic
 
+  public List getMemberList() throws DataException
+  {
+    if (deleted)
+      throw new DataException("This conference has been deleted.");
+
+    if (logger.isDebugEnabled())
+      logger.debug("Member list: conference = " + confid);
+
+    Vector rc = new Vector();    // return from this function
+    Connection conn = null;      // pooled database connection
+
+    try
+    { // get a database connection
+      conn = datapool.getConnection();
+      Statement stmt = conn.createStatement();
+
+      // create a new SQL statement
+      StringBuffer sql = new StringBuffer("SELECT u.uid, u.username, u.description, c.given_name, "
+					  + "c.family_name, c.locality, c.region, c.country, m.granted_lvl "
+					  + "FROM users u, contacts c, confmember m WHERE "
+					  + "u.contactid = c.contactid AND u.uid = m.uid AND m.confid = ");
+      sql.append(confid).append(" AND u.is_anon = 0 ORDER BY u.username;");
+
+      if (logger.isDebugEnabled())
+	logger.debug("SQL: " + sql.toString());
+
+      // launch the search!
+      ResultSet rs = stmt.executeQuery(sql.toString());
+
+      while (rs.next())
+      { // add all the found users to the list
+	UserFoundImpl ufi = new UserFoundImpl(rs.getInt(1),rs.getString(2),rs.getString(3),rs.getString(4),
+					      rs.getString(5),rs.getString(6),rs.getString(7),rs.getString(8),
+					      rs.getInt(9));
+	UserFound tmp = (UserFound)ufi;
+	rc.add(tmp);
+
+      } // end while
+
+    } // end try
+    catch (SQLException e)
+    { // turn SQLException into data exception
+      logger.error("DB error reading member entries: " + e.getMessage(),e);
+      throw new DataException("unable to retrieve member information: " + e.getMessage(),e);
+
+    } // end catch
+    finally
+    { // make sure we release the connection before we go
+      if (conn!=null)
+	datapool.releaseConnection(conn);
+
+    } // end finally
+
+    return new ReadOnlyVector(rc);
+
+  } // end getMemberList
+
+  public int getMemberLevel(int uid) throws DataException
+  {
+    if (deleted)
+      throw new DataException("This conference has been deleted.");
+
+    Connection conn = null;      // pooled database connection
+
+    try
+    { // get a database connection
+      conn = datapool.getConnection();
+      Statement stmt = conn.createStatement();
+
+      // create the statement
+      StringBuffer sql = new StringBuffer("SELECT granted_lvl FROM confmember WHERE confid = ");
+      sql.append(confid).append(" AND uid = ").append(uid).append(';');
+
+      // execute the statement and return the retrieved value
+      ResultSet rs = stmt.executeQuery(sql.toString());
+      if (rs.next())
+	return rs.getInt(1);
+
+    } // end try
+    catch (SQLException e)
+    { // turn SQLException into data exception
+      logger.error("DB error reading member entries: " + e.getMessage(),e);
+      throw new DataException("unable to retrieve member information: " + e.getMessage(),e);
+
+    } // end catch
+    finally
+    { // make sure we release the connection before we go
+      if (conn!=null)
+	datapool.releaseConnection(conn);
+
+    } // end finally
+
+    return -1;  // default return if no member level present
+
+  } // end getMemberLevel
+
+  public boolean isDeleted()
+  {
+    return deleted;
+
+  } // end isDeleted
+
+  public boolean canDeleteConference(int level)
+  {
+    if (deleted)
+      return false;
+    return (level>=delete_level);
+
+  } // end canDeleteConference
+
+  public synchronized void delete(SIGBackend sig) throws DataException
+  {
+    if (deleted)
+      throw new DataException("This conference has been deleted.");
+
+    Connection conn = null;      // database connection
+    AuditRecord ar = null;       // audit record
+    int topic_count, topic_max;  // count and maximum topic
+
+    try
+    { // get a database connection
+      conn = datapool.getConnection();
+      Statement stmt = conn.createStatement();
+
+      // lock tables on the critical stuff that MUST be deleted now
+      stmt.executeUpdate("LOCK TABLES confs WRITE, confalias WRITE, topics READ;");
+      try
+      { // first delete the conference record itself
+	StringBuffer sql = new StringBuffer("DELETE FROM confs WHERE confid = ");
+	sql.append(confid).append(';');
+	stmt.executeUpdate(sql.toString());
+
+	// now delete all its alias records
+	sql.setLength(0);
+	sql.append("DELETE FROM confalias WHERE confid = ").append(confid).append(';');
+	stmt.executeUpdate(sql.toString());
+
+	// determine the number of topics in this conference, and the maximum topic ID
+	sql.setLength(0);
+	sql.append("SELECT COUNT(*), MAX(topicid) FROM topics WHERE confid = ").append(confid).append(';');
+	ResultSet rs = stmt.executeQuery(sql.toString());
+	if (!(rs.next()))
+	  throw new InternalStateError("ConferenceCoreData.delete screwup on topic SELECT");
+	topic_count = rs.getInt(1);
+	topic_max = rs.getInt(2);
+
+	// record that we're now deleted
+	create_date = null;
+	last_update = null;
+	top_topic = -1;
+	name = null;
+	description = null;
+	cached_alias = null;
+	deleted = true;
+
+      } // end try
+      finally
+      { // unlock the tables before we go
+	Statement ulk_stmt = conn.createStatement();
+	ulk_stmt.executeUpdate("UNLOCK TABLES;");
+
+      } // end finally
+
+      // create an audit record indicating we were successful
+      ar = new AuditRecord(AuditRecord.DELETE_CONF,sig.realUID(),sig.userRemoteAddress(),sig.realSIGID(),
+			   "confid=" + confid);
+
+    } // end try
+    catch (SQLException e)
+    { // database error - this is a DataException
+      logger.error("DB error deleting conference: " + e.getMessage(),e);
+      throw new DataException("unable to delete conference: " + e.getMessage(),e);
+
+    } // end catch
+    finally
+    { // make sure the connection is released before we go
+      try
+      { // save off the audit record before we go, though
+	if ((ar!=null) && (conn!=null))
+	  ar.store(conn);
+
+      } // end try
+      catch (SQLException e)
+      { // we couldn't store the audit record!
+	logger.error("DB error saving audit record: " + e.getMessage(),e);
+
+      } // end catch
+
+      if (conn!=null)
+	datapool.releaseConnection(conn);
+
+    } // end finally
+
+    // Delete the rest of the gunk in the background; spin off another thread to handle it.
+    BackgroundConferencePurge purger = new BackgroundConferencePurge(datapool,confid,topic_count,topic_max);
+    Thread thrd = new Thread(purger);
+    thrd.setPriority(Thread.NORM_PRIORITY-1);
+    thrd.start();
+
+  } // end delete
+
   /*--------------------------------------------------------------------------------
    * External static operations (usable only from within package)
    *--------------------------------------------------------------------------------
@@ -1100,13 +1347,13 @@ class ConferenceCoreData implements ConferenceData
 
       // create an audit record indicating we were successful
       ar = new AuditRecord(AuditRecord.CREATE_CONF,sig.realUID(),sig.userRemoteAddress(),sig.realSIGID(),
-			   "confid=" + String.valueOf(new_confid),"name=" + name,"alias=" + alias);
+			   "confid=" + new_confid,"name=" + name,"alias=" + alias);
 
     } // end try
     catch (SQLException e)
     { // database error - this is a DataException
-      logger.error("DB error creating SIG: " + e.getMessage(),e);
-      throw new DataException("unable to create SIG: " + e.getMessage(),e);
+      logger.error("DB error creating conference: " + e.getMessage(),e);
+      throw new DataException("unable to create conference: " + e.getMessage(),e);
 
     } // end catch
     finally

src/com/silverwrist/venice/core/impl/ConferenceData.java

@@ -7,7 +7,7 @@
  * WARRANTY OF ANY KIND, either express or implied. See the License for the specific
  * language governing rights and limitations under the License.
  * 
- * The Original Code is the Venice Web Community System.
+ * The Original Code is the Venice Web Communities System.
  * 
  * The Initial Developer of the Original Code is Eric J. Bowersox <erbo@silcom.com>,
  * for Silverwrist Design Studios.  Portions created by Eric J. Bowersox are
@@ -92,4 +92,14 @@ public interface ConferenceData extends ReferencedData
 
   public abstract short getTopTopic();
 
+  public abstract List getMemberList() throws DataException;
+
+  public abstract int getMemberLevel(int uid) throws DataException;
+
+  public abstract boolean isDeleted();
+
+  public abstract boolean canDeleteConference(int level);
+
+  public abstract void delete(SIGBackend sig) throws DataException;
+
 } // end interface ConferenceData

src/com/silverwrist/venice/core/impl/ConferenceSIGContext.java

@@ -7,7 +7,7 @@
  * WARRANTY OF ANY KIND, either express or implied. See the License for the specific
  * language governing rights and limitations under the License.
  * 
- * The Original Code is the Venice Web Community System.
+ * The Original Code is the Venice Web Communities System.
  * 
  * The Initial Developer of the Original Code is Eric J. Bowersox <erbo@silcom.com>,
  * for Silverwrist Design Studios.  Portions created by Eric J. Bowersox are
@@ -100,4 +100,12 @@ public interface ConferenceSIGContext extends ReferencedData
 
   public abstract short getTopTopic();
 
+  public abstract List getMemberList() throws DataException;
+
+  public abstract int getMemberLevel(int uid) throws DataException;
+
+  public abstract boolean canDeleteConference(int level);
+
+  public abstract void delete(SIGBackend sig) throws DataException;
+
 } // end interface ConferenceSIGContext

src/com/silverwrist/venice/core/impl/ConferenceSIGContextImpl.java

@@ -88,6 +88,7 @@ class ConferenceSIGContextImpl implements ConferenceSIGContext
   private boolean hide_list;       // hide the conference in the list?
   private ConfCache cache;         // cache of locally-important information
   private ConferenceData confdata = null;  // the inner conference data object
+  private boolean deleted = false; // has this conference been deleted?
 
   /*--------------------------------------------------------------------------------
    * Constructors
@@ -170,6 +171,23 @@ class ConferenceSIGContextImpl implements ConferenceSIGContext
 
   } // end constructor
 
+  /*--------------------------------------------------------------------------------
+   * finalize() function
+   *--------------------------------------------------------------------------------
+   */
+
+  protected void finalize()
+  {
+    if (confdata!=null)
+      confdata.rd_release();
+    confdata = null;
+    engine = null;
+    sig = null;
+    datapool = null;
+    cache = null;
+
+  } // end finalize
+
   /*--------------------------------------------------------------------------------
    * Internal functions
    *--------------------------------------------------------------------------------
@@ -179,6 +197,8 @@ class ConferenceSIGContextImpl implements ConferenceSIGContext
   {
     if (confdata==null)
     { // attempt to load the ConferenceSIGContext
+      if (deleted)
+	throw new DataException("This conference has been deleted.");
       confdata = engine.getConferenceDataObject(confid);
 
       // clear cache when we get the real confdata
@@ -194,6 +214,9 @@ class ConferenceSIGContextImpl implements ConferenceSIGContext
   {
     if (confdata==null)
     { // we need to load the ConferenceSIGContext...
+      if (deleted)
+	return null;  // no return on deletion
+
       try
       { // attempt to load the ConferenceSIGContext
 	confdata = engine.getConferenceDataObject(confid);
@@ -442,6 +465,9 @@ class ConferenceSIGContextImpl implements ConferenceSIGContext
 
   public synchronized void setSIGGrantedLevel(SIGBackend sig, int new_level) throws DataException
   {
+    if (deleted)
+      throw new DataException("This conference has been deleted.");
+
     Connection conn = null;  // database connection
     AuditRecord ar = null;   // audit record
       
@@ -501,6 +527,9 @@ class ConferenceSIGContextImpl implements ConferenceSIGContext
 
   public synchronized void setSequence(short seq) throws DataException
   {
+    if (deleted)
+      throw new DataException("This conference has been deleted.");
+
     Connection conn = null;  // database connection
 
     try
@@ -543,6 +572,9 @@ class ConferenceSIGContextImpl implements ConferenceSIGContext
 
   public void setHideList(SIGBackend sig, boolean flag) throws DataException
   {
+    if (deleted)
+      throw new DataException("This conference has been deleted.");
+
     Connection conn = null;  // database connection
     AuditRecord ar = null;   // audit record
       
@@ -697,4 +729,86 @@ class ConferenceSIGContextImpl implements ConferenceSIGContext
 
   } // end getTopTopic
 
+  public List getMemberList() throws DataException
+  {
+    return getConferenceData().getMemberList();
+
+  } // end getMemberList
+
+  public int getMemberLevel(int uid) throws DataException
+  {
+    return getConferenceData().getMemberLevel(uid);
+
+  } // end getMemberLevel
+
+  public boolean canDeleteConference(int level)
+  {
+    ConferenceData c = getConferenceDataNE();
+    if (c==null)
+      return false;
+    if (level<this.level)
+      return c.canDeleteConference(this.level);
+    else
+      return c.canDeleteConference(level);
+
+  } // end canDeleteConference
+
+  public void delete(SIGBackend sig) throws DataException
+  {
+    ConferenceData c = getConferenceData();
+    Connection conn = null;
+    boolean delete_core = true;
+
+    try
+    { // get a database connection
+      conn = datapool.getConnection();
+      Statement stmt = conn.createStatement();
+
+      // see if we have to delete the core object as well
+      StringBuffer sql = new StringBuffer("SELECT sigid FROM sigtoconf WHERE confid = ");
+      sql.append(confid).append(" AND sigid <> ").append(this.sig.realSIGID()).append(" LIMIT 1;");
+      ResultSet rs = stmt.executeQuery(sql.toString());
+      if (rs.next())
+	delete_core = false;  // we don't delete the core yet
+
+      // remove the row that links this conference to this SIG
+      sql.setLength(0);
+      sql.append("DELETE FROM sigtoconf WHERE confid = ").append(confid).append(" AND sigid = ");
+      sql.append(this.sig.realSIGID()).append(';');
+      stmt.executeUpdate(sql.toString());
+
+      // record that we've been deleted
+      level = 0;
+      sequence = -1;
+      hide_list = true;
+      cache = null;
+      deleted = true;
+
+    } // end try
+    catch (SQLException e)
+    { // turn SQLException into data exception
+      logger.error("DB error deleting conference entry: " + e.getMessage(),e);
+      throw new DataException("unable to delete conference information: " + e.getMessage(),e);
+
+    } // end catch
+    finally
+    { // make sure we release the connection before we go
+      if (conn!=null)
+	datapool.releaseConnection(conn);
+
+    } // end finally
+
+    if (delete_core)
+    { // the conference is not linked to any other SIGs - we need to delete the core as well
+      c.delete(sig);
+      engine.detachConferenceDataObject(confid);
+
+    } // end if
+
+    // detach our own reference from the lower-level object
+    confdata = null;
+    c.rd_release();
+
+  } // end delete
+
 } // end class ConferenceSIGContextImpl

src/com/silverwrist/venice/core/impl/ConferenceUserContextImpl.java

@@ -139,6 +139,7 @@ class ConferenceUserContextImpl implements ConferenceContext, ConferenceBackend
   private String pseud;               // default pseud to use in this conference
   private java.util.Date last_read;   // last date we read this conference
   private java.util.Date last_post;   // last date we posted to this conference
+  private boolean deleted = false;    // has conference been deleted?
 
   /*--------------------------------------------------------------------------------
    * Constructors
@@ -202,6 +203,8 @@ class ConferenceUserContextImpl implements ConferenceContext, ConferenceBackend
   {
     if (confdata==null)
     { // attempt to load the ConferenceSIGContext
+      if (deleted)
+	throw new DataException("This conference has been deleted.");
       confdata = sig.getConferenceDataObject(confid);
 
       // clear cache when we get the real confdata
@@ -217,6 +220,9 @@ class ConferenceUserContextImpl implements ConferenceContext, ConferenceBackend
   {
     if (confdata==null)
     { // we need to load the ConferenceSIGContext...
+      if (deleted)
+	return null;  // no return on deletion
+
       try
       { // attempt to load the ConferenceSIGContext
 	confdata = sig.getConferenceDataObject(confid);
@@ -262,6 +268,9 @@ class ConferenceUserContextImpl implements ConferenceContext, ConferenceBackend
 
   private void tryLoadSettings(Connection conn) throws DataException
   {
+    if (deleted)
+      return;  // this is a no-op
+
     try
     { // look up the conference settings for this user
       Statement stmt = conn.createStatement();
@@ -609,7 +618,7 @@ class ConferenceUserContextImpl implements ConferenceContext, ConferenceBackend
 
   } // end removeAlias
 
-  public void addMember(int uid, boolean as_host) throws DataException, AccessError
+  public void setMembership(int uid, int grant_level) throws DataException, AccessError
   {
     if (!(getConferenceData().canChangeConference(level)))
     { // this user can't modify the conference security
@@ -618,13 +627,6 @@ class ConferenceUserContextImpl implements ConferenceContext, ConferenceBackend
 
     } // end if
 
-    // figure out which level to grant the user
-    int grant_level;
-    if (as_host)
-      grant_level = DefaultLevels.hostConference();
-    else
-      grant_level = DefaultLevels.memberConference();
-
     // call down to set the level
     getConferenceData().setMembership(sig,uid,grant_level);
 
@@ -632,28 +634,23 @@ class ConferenceUserContextImpl implements ConferenceContext, ConferenceBackend
     if (uid==sig.realUID())
       recalcLevel(grant_level);
 
+  } // end setMembership
+
+  public void addMember(int uid, boolean as_host) throws DataException, AccessError
+  {
+    setMembership(uid,(as_host ? DefaultLevels.hostConference() : DefaultLevels.memberConference()));
+
   } // end addMember
 
   public void removeMember(int uid) throws DataException, AccessError
   {
-    if (!(getConferenceData().canChangeConference(level)))
-    { // this user can't modify the conference security
-      logger.error("user not permitted to change membership");
-      throw new AccessError("You are not permitted to change the membership of this conference.");
-
-    } // end if
-
-    // call down to set the level
-    getConferenceData().setMembership(sig,uid,-1);
-
-    // If we adjusted our OWN level, reflect that change.
-    if (uid==sig.realUID())
-      recalcLevel(-1);
+    setMembership(uid,-1);
 
   } // end removeMember
 
   public int getSIGGrantedLevel() throws DataException, AccessError
   {
+    ConferenceSIGContext c = getConferenceData();
     if (!(sig.userCanCreateSubobjects()))
     { // this user can't modify the conference security
       logger.error("user not permitted to retrieve security info");
@@ -661,12 +658,13 @@ class ConferenceUserContextImpl implements ConferenceContext, ConferenceBackend
 
     } // end if
 
-    return getConferenceData().getSIGGrantedLevel();
+    return c.getSIGGrantedLevel();
 
   } // end getSIGGrantedLevel
 
   public void setSIGGrantedLevel(int new_level) throws DataException, AccessError
   {
+    ConferenceSIGContext c = getConferenceData();
     if (!(sig.userCanCreateSubobjects()))
     { // this user can't modify the conference security
       logger.error("user not permitted to change security info");
@@ -674,12 +672,13 @@ class ConferenceUserContextImpl implements ConferenceContext, ConferenceBackend
 
     } // end if
 
-    getConferenceData().setSIGGrantedLevel(sig,new_level);
+    c.setSIGGrantedLevel(sig,new_level);
 
   } // end setSIGGrantedLevel
 
   public short getSequence() throws DataException, AccessError
   {
+    ConferenceSIGContext c = getConferenceData();
     if (!(sig.userCanCreateSubobjects()))
     { // this user can't modify the conference security
       logger.error("user not permitted to retrieve layout info");
@@ -687,12 +686,13 @@ class ConferenceUserContextImpl implements ConferenceContext, ConferenceBackend
 
     } // end if
 
-    return getConferenceData().getSequence();
+    return c.getSequence();
 
   } // end getSequence
 
   public void setSequence(short seq) throws DataException, AccessError
   {
+    ConferenceSIGContext c = getConferenceData();
     if (!(sig.userCanCreateSubobjects()))
     { // this user can't modify the conference security
       logger.error("user not permitted to set layout info");
@@ -700,12 +700,13 @@ class ConferenceUserContextImpl implements ConferenceContext, ConferenceBackend
 
     } // end if
 
-    getConferenceData().setSequence(seq);
+    c.setSequence(seq);
 
   } // end setSequence
 
   public boolean getHideList() throws DataException, AccessError
   {
+    ConferenceSIGContext c = getConferenceData();
     if (!(sig.userCanCreateSubobjects()))
     { // this user can't modify the conference security
       logger.error("user not permitted to retrieve security info");
@@ -713,12 +714,13 @@ class ConferenceUserContextImpl implements ConferenceContext, ConferenceBackend
 
     } // end if
 
-    return getConferenceData().getHideList();
+    return c.getHideList();
 
   } // end getHideList
 
   public void setHideList(boolean flag) throws DataException, AccessError
   {
+    ConferenceSIGContext c = getConferenceData();
     if (!(sig.userCanCreateSubobjects()))
     { // this user can't modify the conference security
       logger.error("user not permitted to change security info");
@@ -726,7 +728,7 @@ class ConferenceUserContextImpl implements ConferenceContext, ConferenceBackend
 
     } // end if
 
-    getConferenceData().setHideList(sig,flag);
+    c.setHideList(sig,flag);
 
   } // end setHideList
 
@@ -740,6 +742,8 @@ class ConferenceUserContextImpl implements ConferenceContext, ConferenceBackend
   {
     if (sig.userIsAnonymous())
       return;  // anonymous user can't change pseud
+    if (deleted)
+      throw new DataException("This conference has been deleted.");
 
     Connection conn = null;      // pooled database connection
 
@@ -787,6 +791,8 @@ class ConferenceUserContextImpl implements ConferenceContext, ConferenceBackend
 
   public boolean anyUnread()
   {
+    if (deleted)
+      return false;
     Connection conn = null;      // pooled database connection
 
     try
@@ -832,7 +838,7 @@ class ConferenceUserContextImpl implements ConferenceContext, ConferenceBackend
   {
     if (!(getConferenceData().canReadConference(level)))
     { // the luser can't even read the conference...
-      logger.error("user not permitted to change membership");
+      logger.error("user not permitted to get topics");
       throw new AccessError("You are not permitted to read this conference.");
 
     } // end if
@@ -929,7 +935,7 @@ class ConferenceUserContextImpl implements ConferenceContext, ConferenceBackend
   {
     if (!(getConferenceData().canReadConference(level)))
     { // the luser can't even read the conference...
-      logger.error("user not permitted to change membership");
+      logger.error("user not permitted to get messages");
       throw new AccessError("You are not permitted to read this conference.");
 
     } // end if
@@ -953,8 +959,15 @@ class ConferenceUserContextImpl implements ConferenceContext, ConferenceBackend
     
   } // end getNewTopicPreviewChecker
 
-  public void fixSeen() throws DataException
+  public void fixSeen() throws DataException, AccessError
   {
+    if (!(getConferenceData().canReadConference(level)))
+    { // the luser can't even read the conference...
+      logger.error("user not permitted to set unread messages");
+      throw new AccessError("You are not permitted to read this conference.");
+
+    } // end if
+
     if (sig.userIsAnonymous())
       return;  // anonymous user can't fixseen
 
@@ -1018,8 +1031,15 @@ class ConferenceUserContextImpl implements ConferenceContext, ConferenceBackend
 
   } // end fixSeen
 
-  public List getActivePosters(int skip, int limit) throws DataException
+  public List getActivePosters(int skip, int limit) throws DataException, AccessError
   {
+    if (!(getConferenceData().canReadConference(level)))
+    { // the luser can't even read the conference...
+      logger.error("user not permitted to get posters list");
+      throw new AccessError("You are not permitted to read this conference.");
+
+    } // end if
+
     Connection conn = null;
     Vector rc = new Vector();
 
@@ -1066,20 +1086,27 @@ class ConferenceUserContextImpl implements ConferenceContext, ConferenceBackend
 
   } // end getActivePosters
 
-  public List getActivePosters(int limit) throws DataException
+  public List getActivePosters(int limit) throws DataException, AccessError
   {
     return getActivePosters(0,limit);
 
   } // end getActivePosters
 
-  public List getActivePosters() throws DataException
+  public List getActivePosters() throws DataException, AccessError
   {
     return getActivePosters(-1,-1);
 
   } // end getActivePosters
 
-  public List getActiveReaders(int skip, int limit) throws DataException
+  public List getActiveReaders(int skip, int limit) throws DataException, AccessError
   {
+    if (!(getConferenceData().canReadConference(level)))
+    { // the luser can't even read the conference...
+      logger.error("user not permitted to get readers list");
+      throw new AccessError("You are not permitted to read this conference.");
+
+    } // end if
+
     Connection conn = null;
     Vector rc = new Vector();
 
@@ -1126,18 +1153,81 @@ class ConferenceUserContextImpl implements ConferenceContext, ConferenceBackend
 
   } // end getActiveReaders
 
-  public List getActiveReaders(int limit) throws DataException
+  public List getActiveReaders(int limit) throws DataException, AccessError
   {
     return getActiveReaders(0,limit);
 
   } // end getActiveReaders
 
-  public List getActiveReaders() throws DataException
+  public List getActiveReaders() throws DataException, AccessError
   {
     return getActiveReaders(-1,-1);
 
   } // end getActiveReaders
 
+  public List getMemberList() throws DataException, AccessError
+  {
+    if (!(getConferenceData().canReadConference(level)))
+    { // the luser can't even read the conference...
+      logger.error("user not permitted to get member list");
+      throw new AccessError("You are not permitted to read this conference.");
+
+    } // end if
+
+    return getConferenceData().getMemberList();
+
+  } // end getMemberList
+
+  public int getMemberLevel(int uid) throws DataException, AccessError
+  {
+    if (!(getConferenceData().canReadConference(level)))
+    { // the luser can't even read the conference...
+      logger.error("user not permitted to get member data");
+      throw new AccessError("You are not permitted to read this conference.");
+
+    } // end if
+
+    return getConferenceData().getMemberLevel(uid);
+
+  } // end getMemberLevel
+
+  public void delete() throws DataException, AccessError
+  {
+    ConferenceSIGContext ctxt = getConferenceData();
+    if (!(ctxt.canDeleteConference(level)) || !(sig.userCanDeleteSubobjects()))
+    { // no way can we delete this conference, not NO way!
+      logger.error("user not permitted to delete conference");
+      throw new AccessError("You are not permitted to delete this conference.");
+
+    } // end if
+
+    // call the methods required to delete the conference
+    ctxt.delete(sig);
+    sig.detachConferenceDataObject(confid);
+
+    // flag that we've been deleted
+    cache = null;
+    settings_loaded = true;
+    pseud = null;
+    last_read = null;
+    last_post = null;
+    deleted = true;
+
+    // detach our references from the lower-level object
+    confdata = null;
+    ctxt.rd_release();
+
+  } // end delete
+
+  public boolean canDeleteConference()
+  {
+    ConferenceSIGContext c = getConferenceDataNE();
+    if (c==null)
+      return false;
+    return (c.canDeleteConference(level) && sig.userCanDeleteSubobjects());
+
+  } // end canDeleteConference
+
   /*--------------------------------------------------------------------------------
    * Implementations from interface UserBackend
    *--------------------------------------------------------------------------------
@@ -1214,6 +1304,18 @@ class ConferenceUserContextImpl implements ConferenceContext, ConferenceBackend
 
   } // end realSIGAlias
 
+  public void detachConferenceDataObject(int confid) throws DataException
+  {
+    sig.detachConferenceDataObject(confid);
+
+  } // end detachConferenceDataObject
+
+  public boolean userCanDeleteSubobjects()
+  {
+    return sig.userCanDeleteSubobjects();
+
+  } // end userCanDeleteSubobjects
+
   /*--------------------------------------------------------------------------------
    * Implementations from interface ConferenceBackend
    *--------------------------------------------------------------------------------
@@ -1236,7 +1338,7 @@ class ConferenceUserContextImpl implements ConferenceContext, ConferenceBackend
 
   public void touchRead(Connection conn) throws SQLException
   {
-    if (sig.userIsAnonymous())
+    if (deleted || sig.userIsAnonymous())
       return;  // anonymous user can't update squat
 
     Statement stmt = conn.createStatement();
@@ -1268,7 +1370,7 @@ class ConferenceUserContextImpl implements ConferenceContext, ConferenceBackend
 
   public void touchPost(Connection conn, java.util.Date post_date) throws SQLException
   {
-    if (sig.userIsAnonymous())
+    if (deleted || sig.userIsAnonymous())
       return;  // anonymous user can't update squat
 
     Statement stmt = conn.createStatement();
@@ -1299,6 +1401,9 @@ class ConferenceUserContextImpl implements ConferenceContext, ConferenceBackend
 
   public String realConfAlias()
   {
+    if (deleted)
+      return null;
+
     try
     { // just pull it from the lower-level object
       return getConferenceData().getAnAlias();

src/com/silverwrist/venice/core/impl/EngineBackend.java

@@ -7,7 +7,7 @@
  * WARRANTY OF ANY KIND, either express or implied. See the License for the specific
  * language governing rights and limitations under the License.
  * 
- * The Original Code is the Venice Web Community System.
+ * The Original Code is the Venice Web Communities System.
  * 
  * The Initial Developer of the Original Code is Eric J. Bowersox <erbo@silcom.com>,
  * for Silverwrist Design Studios.  Portions created by Eric J. Bowersox are
@@ -32,6 +32,9 @@ public interface EngineBackend
 
   public static final int IP_POSTSPERPAGE = 0;
   public static final int IP_POSTSATTOP = 1;
+  public static final int IP_MAXSEARCHRETURN = 2;
+  public static final int IP_MAXSIGMEMBERDISPLAY = 3;
+  public static final int IP_MAXCONFMEMBERDISPLAY = 4;
 
   public abstract SimpleEmailer createEmailer();
 
@@ -45,6 +48,8 @@ public interface EngineBackend
 
   public abstract SIGData getSIGDataObject(int sigid) throws DataException;
 
+  public abstract void detachSIGDataObject(int sigid);
+
   public abstract BitSet getLockedFeaturesMask();
 
   public abstract List getSIGFeatureSet(BitSet enabled_features, int level, boolean read_privs);
@@ -63,6 +68,8 @@ public interface EngineBackend
 
   public abstract ConferenceData getConferenceDataObject(int confid) throws DataException;
 
+  public abstract void detachConferenceDataObject(int confid);
+
   public abstract void saveAuditRecord(AuditRecord ar);
 
   public abstract void registerNewConference(ConferenceData conf);

src/com/silverwrist/venice/core/impl/SIGBackend.java

@@ -33,4 +33,8 @@ public interface SIGBackend extends UserBackend
 
   public abstract String realSIGAlias();
 
+  public abstract void detachConferenceDataObject(int confid) throws DataException;
+
+  public abstract boolean userCanDeleteSubobjects();
+
 } // end interface SIGBackend

src/com/silverwrist/venice/core/impl/SIGCoreData.java

@@ -78,7 +78,7 @@ class SIGCoreData implements SIGData, SIGDataBackend
   SIGCoreData(EngineBackend engine, DataPool datapool, int sigid) throws DataException
   {
     if (logger.isDebugEnabled())
-      logger.debug("new SIGCoreData for SIG " + String.valueOf(sigid));
+      logger.debug("new SIGCoreData for SIG " + sigid);
     this.engine = engine;
     this.datapool = datapool;
     this.sigid = sigid;
@@ -95,7 +95,7 @@ class SIGCoreData implements SIGData, SIGDataBackend
       sql.append(sigid).append(';');
       ResultSet rs = stmt.executeQuery(sql.toString());
       if (!(rs.next()))
-	throw new DataException("SIG #" + String.valueOf(sigid) + " does not exist in the database.");
+	throw new DataException("SIG #" + sigid + " does not exist in the database.");
 
       loadData(rs);  // load the SIG data
 
@@ -129,7 +129,7 @@ class SIGCoreData implements SIGData, SIGDataBackend
 			BitSet features)
   {
     if (logger.isDebugEnabled())
-      logger.debug("new SIGCoreData for BRAND NEW SIG " + String.valueOf(sigid));
+      logger.debug("new SIGCoreData for BRAND NEW SIG " + sigid);
     this.engine = engine;
     this.datapool = datapool;
     this.sigid = sigid;
@@ -218,8 +218,8 @@ class SIGCoreData implements SIGData, SIGDataBackend
     alias = rs.getString("alias");
 
     if (logger.isDebugEnabled())
-      logger.debug("Loaded data for SIG \"" + name + "\" (ID " + String.valueOf(sigid) + ", alias '"
-		   + alias + "') successfully");
+      logger.debug("Loaded data for SIG \"" + name + "\" (ID " + sigid + ", alias '" + alias
+		   + "') successfully");
 
   } // end loadData
 
@@ -438,13 +438,13 @@ class SIGCoreData implements SIGData, SIGDataBackend
       { // contact being established for the first time
 	contactid = ci.getContactID();
 	if (logger.isDebugEnabled())
-	  logger.debug("established new contact ID (" + String.valueOf(contactid) + ") for this SIG");
+	  logger.debug("established new contact ID (" + contactid + ") for this SIG");
 
       } // end if
 
       touchUpdate(conn);
       ar = new AuditRecord(AuditRecord.SIG_CONTACT_INFO,user.realUID(),user.userRemoteAddress(),sigid,
-			   "contactid=" + String.valueOf(contactid));
+			   "contactid=" + contactid);
 
     } // end try
     catch (ClassCastException cce)
@@ -691,7 +691,7 @@ class SIGCoreData implements SIGData, SIGDataBackend
       this.category_id = catid;
       last_update = now;
       ar = new AuditRecord(AuditRecord.SIG_CATEGORY,user.realUID(),user.userRemoteAddress(),sigid,
-			   "catid=" + String.valueOf(catid));
+			   "catid=" + catid);
 
     } // end try
     catch (SQLException e)
@@ -879,7 +879,7 @@ class SIGCoreData implements SIGData, SIGDataBackend
       hidden_search = search;
       last_update = now;
       ar = new AuditRecord(AuditRecord.SIG_HIDE_INFO,user.realUID(),user.userRemoteAddress(),sigid,
-			   "dir=" + String.valueOf(directory) + ",search=" + String.valueOf(search));
+			   "dir=" + directory + ",search=" + search);
 
     } // end try
     catch (SQLException e)
@@ -932,7 +932,7 @@ class SIGCoreData implements SIGData, SIGDataBackend
       members_only = flag;
       last_update = now;
       ar = new AuditRecord(AuditRecord.SIG_MEMBERS_ONLY,user.realUID(),user.userRemoteAddress(),sigid,
-			   "flag=" + String.valueOf(flag));
+			   "flag=" + flag);
 
     } // end try
     catch (SQLException e)
@@ -1013,7 +1013,7 @@ class SIGCoreData implements SIGData, SIGDataBackend
       ResultSet rs = stmt.executeQuery(sql.toString());
       if (!(rs.next()))
       { // can't find the join key?
-	logger.error("SIG " + String.valueOf(sigid) + "appears to not be there");
+	logger.error("SIG " + sigid + "appears to not be there");
 	throw new DataException("Unable to find join key for SIG");
 
       } // end if
@@ -1241,7 +1241,7 @@ class SIGCoreData implements SIGData, SIGDataBackend
       { // update the SIG data and generate an audit record
 	touchUpdate(conn);
 	ar = new AuditRecord(AuditRecord.SET_MEMBERSHIP,user.realUID(),user.userRemoteAddress(),sigid,
-			     "uid=" + String.valueOf(uid),"level=" + String.valueOf(grant_level));
+			     "uid=" + uid,"level=" + grant_level);
       } // end if
 
     } // end try
@@ -1319,10 +1319,10 @@ class SIGCoreData implements SIGData, SIGDataBackend
 
   } // end isFeaturePresent
 
-  public ConferenceSIGContext getConferenceDataObject(int confid) throws DataException
+  public synchronized ConferenceSIGContext getConferenceDataObject(int confid) throws DataException
   {
     if (logger.isDebugEnabled())
-      logger.debug("getConferenceDataObject(" + String.valueOf(confid) + ")...");
+      logger.debug("getConferenceDataObject(" + confid + ")...");
 
     Integer the_confid = new Integer(confid);
     ConferenceSIGContext csc = (ConferenceSIGContext)(conf_objects.get(the_confid));
@@ -1346,6 +1346,24 @@ class SIGCoreData implements SIGData, SIGDataBackend
 
   } // end getConferenceDataObject
 
+  public synchronized void detachConferenceDataObject(int confid)
+  {
+    if (logger.isDebugEnabled())
+      logger.debug("detachConferenceDataObject(" + confid + ")...");
+
+    Integer the_confid = new Integer(confid);
+    ConferenceSIGContext csc = (ConferenceSIGContext)(conf_objects.get(the_confid));
+    if (csc!=null)
+    { // remove from the hashtable
+      conf_objects.remove(the_confid);
+      csc.rd_release();
+      if (logger.isDebugEnabled())
+	logger.debug("...reference released");
+
+    } // end if
+
+  } // end detachConferenceDataObject
+
   public ConferenceSIGContext createConference(SIGBackend sig, String name, String alias, String description,
 					       boolean pvt, boolean hide_list) throws DataException
   {
@@ -1362,19 +1380,271 @@ class SIGCoreData implements SIGData, SIGDataBackend
     cdata.rd_release();
     rcs = null;
 
-    // Register this object with our local cache of ConferenceSIGData objects.
-    Integer the_confid = new Integer(conf.getConfID());
-    if (conf_objects.get(the_confid)!=null)
-      throw new InternalStateError("ConfID " + the_confid.toString() + " already exists...but it CAN'T HAVE!");
+    synchronized (this)
+    { // Register this object with our local cache of ConferenceSIGData objects.
+      Integer the_confid = new Integer(conf.getConfID());
+      if (conf_objects.get(the_confid)!=null)
+	throw new InternalStateError("ConfID " + the_confid + " already exists...but it CAN'T HAVE!");
 
-    // throw an extra reference on it and dump it in the object cache
-    conf.rd_addRef();
-    conf_objects.put(the_confid,conf);
+      // throw an extra reference on it and dump it in the object cache
+      conf.rd_addRef();
+      conf_objects.put(the_confid,conf);
+
+    } // end synchronized block
 
     return conf;  // pass it up to the next level
 
   } // end createConference
 
+  public List searchForMembers(int field, int mode, String term, int offset, int count,
+			       boolean include_hidden) throws DataException
+  {
+    if (logger.isDebugEnabled())
+      logger.debug("Member search: SIG = " + sigid + ", field = " + field + ", mode = " + mode + ", term '"
+		   + term + "', offset = " + offset + ", count = " + count);
+
+    Vector rc = new Vector();    // return from this function
+    Connection conn = null;      // pooled database connection
+
+    try
+    { // get a database connection
+      conn = datapool.getConnection();
+      Statement stmt = conn.createStatement();
+
+      // create a new SQL statement
+      StringBuffer sql = new StringBuffer("SELECT u.uid, u.username, u.description, c.given_name, "
+					  + "c.family_name, c.locality, c.region, c.country, m.granted_lvl "
+					  + "FROM users u, contacts c, sigmember m WHERE "
+					  + "u.contactid = c.contactid AND u.uid = m.uid AND m.sigid = ");
+      sql.append(sigid).append(" AND ");
+      switch (field)
+      { // determine which field to search on
+	case SearchMode.FIELD_USER_NAME:
+	  sql.append("u.username ");
+	  break;
+
+	case SearchMode.FIELD_USER_DESCRIPTION:
+	  sql.append("u.description ");
+	  break;
+
+	case SearchMode.FIELD_USER_GIVEN_NAME:
+	  sql.append("c.given_name ");
+	  break;
+
+	case SearchMode.FIELD_USER_FAMILY_NAME:
+	  sql.append("c.family_name ");
+	  break;
+
+	default:
+	  throw new DataException("invalid search field specified");
+
+      } // end switch
+
+      switch (mode)
+      { // compose SQL in different ways depending on the search term
+	case SearchMode.SEARCH_PREFIX:
+	  sql.append("LIKE '").append(SQLUtil.encodeStringWildcards(term)).append("%'");
+	  break;
+
+	case SearchMode.SEARCH_SUBSTRING:
+	  sql.append("LIKE '%").append(SQLUtil.encodeStringWildcards(term)).append("%'");
+	  break;
+
+	case SearchMode.SEARCH_REGEXP:
+	  sql.append("REGEXP '").append(SQLUtil.encodeString(term)).append('\'');
+	  break;
+
+	default:
+	  throw new DataException("invalid search mode specified");
+
+      } // end switch
+
+      if (!include_hidden)
+	sql.append(" AND m.hidden = 0");
+      sql.append(" AND u.is_anon = 0 ORDER BY u.username LIMIT ").append(offset).append(", ");
+      sql.append(count+1).append(';');
+
+      if (logger.isDebugEnabled())
+	logger.debug("SQL: " + sql.toString());
+
+      // launch the search!
+      ResultSet rs = stmt.executeQuery(sql.toString());
+
+      while (rs.next())
+      { // add all the found users to the list
+	UserFoundImpl ufi = new UserFoundImpl(rs.getInt(1),rs.getString(2),rs.getString(3),rs.getString(4),
+					      rs.getString(5),rs.getString(6),rs.getString(7),rs.getString(8),
+					      rs.getInt(9));
+	UserFound tmp = (UserFound)ufi;
+	rc.add(tmp);
+
+      } // end while
+
+    } // end try
+    catch (SQLException e)
+    { // turn SQLException into data exception
+      logger.error("DB error reading member entries: " + e.getMessage(),e);
+      throw new DataException("unable to retrieve member information: " + e.getMessage(),e);
+
+    } // end catch
+    finally
+    { // make sure we release the connection before we go
+      if (conn!=null)
+	datapool.releaseConnection(conn);
+
+    } // end finally
+
+    return new ReadOnlyVector(rc);
+
+  } // end searchForMembers
+
+  public int getSearchMemberCount(int field, int mode, String term, boolean include_hidden)
+      throws DataException
+  {
+    if (logger.isDebugEnabled())
+      logger.debug("User search: SIG = " + sigid + ", field = " + field + ", mode = " + mode + ", term '"
+		   + term + "'");
+
+    Connection conn = null;      // pooled database connection
+
+    try
+    { // get a database connection
+      conn = datapool.getConnection();
+      Statement stmt = conn.createStatement();
+      StringBuffer sql = new StringBuffer("SELECT COUNT(*) FROM users u, contacts c, sigmember m WHERE "
+					  + "u.contactid = c.contactid AND u.uid = m.uid AND m.sigid = ");
+      sql.append(sigid).append(" AND ");
+
+      switch (field)
+      { // determine which field to search on
+	case SearchMode.FIELD_USER_NAME:
+	  sql.append("u.username ");
+	  break;
+
+	case SearchMode.FIELD_USER_DESCRIPTION:
+	  sql.append("u.description ");
+	  break;
+
+	case SearchMode.FIELD_USER_GIVEN_NAME:
+	  sql.append("c.given_name ");
+	  break;
+
+	case SearchMode.FIELD_USER_FAMILY_NAME:
+	  sql.append("c.family_name ");
+	  break;
+
+	default:
+	  throw new DataException("invalid search field specified");
+
+      } // end switch
+
+      switch (mode)
+      { // compose SQL in different ways depending on the search term
+	case SearchMode.SEARCH_PREFIX:
+	  sql.append("LIKE '").append(SQLUtil.encodeStringWildcards(term)).append("%'");
+	  break;
+
+	case SearchMode.SEARCH_SUBSTRING:
+	  sql.append("LIKE '%").append(SQLUtil.encodeStringWildcards(term)).append("%'");
+	  break;
+
+	case SearchMode.SEARCH_REGEXP:
+	  sql.append("REGEXP '").append(SQLUtil.encodeString(term)).append('\'');
+	  break;
+
+	default:
+	  throw new DataException("invalid search mode specified");
+
+      } // end switch
+
+      if (!include_hidden)
+	sql.append(" AND m.hidden = 0");
+      sql.append(" AND u.is_anon = 0;");
+
+      if (logger.isDebugEnabled())
+	logger.debug("SQL: " + sql.toString());
+
+      // launch the search!
+      ResultSet rs = stmt.executeQuery(sql.toString());
+
+      if (!(rs.next()))
+	throw new InternalStateError("getSearchMemberCount failure (MUST have 1 row!)");
+
+      return rs.getInt(1);
+
+    } // end try
+    catch (SQLException e)
+    { // turn SQLException into data exception
+      logger.error("DB error reading member entries: " + e.getMessage(),e);
+      throw new DataException("unable to retrieve member information: " + e.getMessage(),e);
+
+    } // end catch
+    finally
+    { // make sure we release the connection before we go
+      if (conn!=null)
+	datapool.releaseConnection(conn);
+
+    } // end finally
+
+  } // end getSearchMemberCount
+
+  public List getMemberList(boolean include_hidden) throws DataException
+  {
+    if (logger.isDebugEnabled())
+      logger.debug("Member list: SIG = " + sigid);
+
+    Vector rc = new Vector();    // return from this function
+    Connection conn = null;      // pooled database connection
+
+    try
+    { // get a database connection
+      conn = datapool.getConnection();
+      Statement stmt = conn.createStatement();
+
+      // create a new SQL statement
+      StringBuffer sql = new StringBuffer("SELECT u.uid, u.username, u.description, c.given_name, "
+					  + "c.family_name, c.locality, c.region, c.country, m.granted_lvl "
+					  + "FROM users u, contacts c, sigmember m WHERE "
+					  + "u.contactid = c.contactid AND u.uid = m.uid AND m.sigid = ");
+      sql.append(sigid);
+      if (!include_hidden)
+	sql.append(" AND m.hidden = 0");
+      sql.append(" AND u.is_anon = 0 ORDER BY u.username;");
+
+      if (logger.isDebugEnabled())
+	logger.debug("SQL: " + sql.toString());
+
+      // launch the search!
+      ResultSet rs = stmt.executeQuery(sql.toString());
+
+      while (rs.next())
+      { // add all the found users to the list
+	UserFoundImpl ufi = new UserFoundImpl(rs.getInt(1),rs.getString(2),rs.getString(3),rs.getString(4),
+					      rs.getString(5),rs.getString(6),rs.getString(7),rs.getString(8),
+					      rs.getInt(9));
+	UserFound tmp = (UserFound)ufi;
+	rc.add(tmp);
+
+      } // end while
+
+    } // end try
+    catch (SQLException e)
+    { // turn SQLException into data exception
+      logger.error("DB error reading member entries: " + e.getMessage(),e);
+      throw new DataException("unable to retrieve member information: " + e.getMessage(),e);
+
+    } // end catch
+    finally
+    { // make sure we release the connection before we go
+      if (conn!=null)
+	datapool.releaseConnection(conn);
+
+    } // end finally
+
+    return new ReadOnlyVector(rc);
+
+  } // end getMemberList
+
   /*--------------------------------------------------------------------------------
    * Implementations from interface SIGDataBackend
    *--------------------------------------------------------------------------------

src/com/silverwrist/venice/core/impl/SIGData.java

@@ -132,8 +132,18 @@ public interface SIGData extends ReferencedData
 
   public abstract ConferenceSIGContext getConferenceDataObject(int confid) throws DataException;
 
+  public abstract void detachConferenceDataObject(int confid);
+
   public abstract ConferenceSIGContext createConference(SIGBackend sig, String name, String alias,
 							String description, boolean pvt, boolean hide_list)
       throws DataException;
 
+  public abstract List searchForMembers(int field, int mode, String term, int offset, int count,
+					boolean include_hidden) throws DataException;
+
+  public abstract int getSearchMemberCount(int field, int mode, String term, boolean include_hidden)
+      throws DataException;
+
+  public abstract List getMemberList(boolean include_hidden) throws DataException;
+
 } // end interface SIGData

src/com/silverwrist/venice/core/impl/SIGUserContextImpl.java

@@ -1073,6 +1073,25 @@ class SIGUserContextImpl implements SIGContext, SIGBackend
 
   } // end canCreateConference
 
+  public List searchForMembers(int field, int mode, String term, int offset, int count)
+      throws DataException
+  {
+    return getSIGData().searchForMembers(field,mode,term,offset,count,Capability.showHiddenSIGMembers(level));
+
+  } // end searchForMembers
+
+  public int getSearchMemberCount(int field, int mode, String term) throws DataException
+  {
+    return getSIGData().getSearchMemberCount(field,mode,term,Capability.showHiddenSIGMembers(level));
+
+  } // end getSearchMemberCount
+
+  public List getMemberList() throws DataException
+  {
+    return getSIGData().getMemberList(Capability.showHiddenSIGMembers(level));
+
+  } // end getMemberList
+
   /*--------------------------------------------------------------------------------
    * Implementations from interface UserBackend
    *--------------------------------------------------------------------------------
@@ -1155,6 +1174,18 @@ class SIGUserContextImpl implements SIGContext, SIGBackend
 
   } // end realSIGAlias
 
+  public void detachConferenceDataObject(int confid) throws DataException
+  {
+    getSIGData().detachConferenceDataObject(confid);
+
+  } // end detachConferenceDataObject
+
+  public boolean userCanDeleteSubobjects()
+  {
+    return userCanCreateSubobjects();
+
+  } // end userCanDeleteSubobjects
+
   /*--------------------------------------------------------------------------------
    * Static operations for use within the implementation package
    *--------------------------------------------------------------------------------

src/com/silverwrist/venice/core/impl/UserFoundImpl.java

@@ -129,4 +129,11 @@ class UserFoundImpl implements UserFound
 
   } // end getLevel
 
+  public UserFound createNewLevel(int level)
+  {
+    return new UserFoundImpl(this.uid,this.name,this.description,this.given_name,this.family_name,
+			     this.locality,this.region,this.country,level);
+
+  } // end createNewLevel
+
 } // end class UserFoundImpl

src/com/silverwrist/venice/core/impl/VeniceEngineImpl.java

@@ -242,7 +242,9 @@ public class VeniceEngineImpl implements VeniceEngine, EngineBackend
 
   private void loadDefaults(Statement stmt) throws SQLException, DataException
   {
-    final String query = "SELECT posts_per_page, old_posts_at_top FROM globals;";
+    final String query =
+        "SELECT posts_per_page, old_posts_at_top, max_search_page, max_sig_mbr_page, max_conf_mbr_page "
+      + "FROM globals;";
     ResultSet rs = stmt.executeQuery(query);
     if (!(rs.next()))
       throw new DataException("Globals table does not appear to be loaded!");
@@ -250,6 +252,9 @@ public class VeniceEngineImpl implements VeniceEngine, EngineBackend
     // stash the globals from the database
     gp_ints[IP_POSTSPERPAGE] = rs.getInt(1);
     gp_ints[IP_POSTSATTOP] = rs.getInt(2);
+    gp_ints[IP_MAXSEARCHRETURN] = rs.getInt(3);
+    gp_ints[IP_MAXSIGMEMBERDISPLAY] = rs.getInt(4);
+    gp_ints[IP_MAXCONFMEMBERDISPLAY] = rs.getInt(5);
     
   } // end loadDefaults
 
@@ -381,7 +386,7 @@ public class VeniceEngineImpl implements VeniceEngine, EngineBackend
       } // end for
 
       if (logger.isDebugEnabled())
-	logger.debug(String.valueOf(stock_messages.size()) + " stock messages loaded from config");
+	logger.debug(stock_messages.size() + " stock messages loaded from config");
 
     } // end try
     catch (ConfigException ce)
@@ -393,7 +398,7 @@ public class VeniceEngineImpl implements VeniceEngine, EngineBackend
     } // end catch
 
     // Allocate the global parameter arrays.
-    gp_ints = new int[2];
+    gp_ints = new int[5];
 
     // initialize anything that requires us to pull from the database
     Connection conn = null;
@@ -419,7 +424,7 @@ public class VeniceEngineImpl implements VeniceEngine, EngineBackend
       features = new VeniceFeatureDef[++max_value];
       System.arraycopy(tmp_array,0,features,0,max_value);
       if (logger.isDebugEnabled())
-	logger.debug(String.valueOf(max_value) + " features loaded from database");
+	logger.debug(max_value + " features loaded from database");
 
       // load the global defaults
       loadDefaults(stmt);
@@ -556,13 +561,13 @@ public class VeniceEngineImpl implements VeniceEngine, EngineBackend
 
       while (rs.next())
       { // load up a stack of memory objects with the country list
-	Country c = new CountryImpl(rs.getString("code"),rs.getString("name"));
+	Country c = new CountryImpl(rs.getString(1),rs.getString(2));
 	rc.add(c);
 
       } // end while
 
       if (logger.isDebugEnabled())
-	logger.debug("getCountryList(): loaded " + String.valueOf(rc.size()) + " country names");
+	logger.debug("getCountryList(): loaded " + rc.size() + " country names");
 
     } // end try
     catch (SQLException e)
@@ -596,13 +601,13 @@ public class VeniceEngineImpl implements VeniceEngine, EngineBackend
 
       while (rs.next())
       { // load up a stack of memory objects with the country list
-	Language l = new LanguageImpl(rs.getString("code"),rs.getString("name"));
+	Language l = new LanguageImpl(rs.getString(1),rs.getString(2));
 	rc.add(l);
 
       } // end while
 
       if (logger.isDebugEnabled())
-	logger.debug("getLanguageList(): loaded " + String.valueOf(rc.size()) + " language names");
+	logger.debug("getLanguageList(): loaded " + rc.size() + " language names");
 
     } // end try
     catch (SQLException e)
@@ -649,9 +654,9 @@ public class VeniceEngineImpl implements VeniceEngine, EngineBackend
     { // look for a user name matching this user record
       conn = datapool.getConnection();
       Statement stmt = conn.createStatement();
-      ResultSet rs = stmt.executeQuery("SELECT c.email AS email FROM users u, contacts c "
-				       + "WHERE u.contactid = c.contactid AND u.username = '"
-				       + SQLUtil.encodeString(username) + "';");
+      ResultSet rs = stmt.executeQuery("SELECT c.email FROM users u, contacts c WHERE u.contactid = "
+				       + "c.contactid AND u.username = '" + SQLUtil.encodeString(username)
+				       + "';");
       if (!(rs.next()))
       { // could not find email address
 	logger.warn("getEmailAddressForUser(\"" + username + "\") => not found!");
@@ -660,7 +665,7 @@ public class VeniceEngineImpl implements VeniceEngine, EngineBackend
 
       } // end if
 
-      String rc = rs.getString("email");
+      String rc = rs.getString(1);
       if (logger.isDebugEnabled())
 	logger.debug("getEmailAddressForUser(\"" + username + "\") => \"" + rc + "\"");
       return rc;
@@ -690,9 +695,8 @@ public class VeniceEngineImpl implements VeniceEngine, EngineBackend
     { // look for a user name matching this user record
       conn = datapool.getConnection();
       Statement stmt = conn.createStatement();
-      StringBuffer sql = new StringBuffer("SELECT c.email AS email, u.passreminder AS passreminder "
-					  + "FROM users u, contacts c WHERE u.contactid = c.contactid "
-					  + "AND u.username = '");
+      StringBuffer sql = new StringBuffer("SELECT c.email, u.passreminder FROM users u, contacts c WHERE "
+					  + "u.contactid = c.contactid AND u.username = '");
       sql.append(SQLUtil.encodeString(username)).append("';");
       ResultSet rs = stmt.executeQuery(sql.toString());
       if (!(rs.next()))
@@ -703,7 +707,7 @@ public class VeniceEngineImpl implements VeniceEngine, EngineBackend
 
       } // end if
 
-      String email_addr = rs.getString("email");
+      String email_addr = rs.getString(1);
       if (logger.isDebugEnabled())
 	logger.debug("sendPasswordReminder(\"" + username + "\") going out to \"" + email_addr + "\"");
 
@@ -717,7 +721,7 @@ public class VeniceEngineImpl implements VeniceEngine, EngineBackend
       } // end if
 
       message = StringUtil.replaceAllInstances(message,"$USERNAME",username);
-      message = StringUtil.replaceAllInstances(message,"$REMINDER",rs.getString("passreminder"));
+      message = StringUtil.replaceAllInstances(message,"$REMINDER",rs.getString(2));
 
       // Create the emailer and send the message.
       SimpleEmailer emailer = createEmailer();
@@ -796,7 +800,7 @@ public class VeniceEngineImpl implements VeniceEngine, EngineBackend
 
 	new_uid = rs.getInt(1);
 	if (logger.isDebugEnabled())
-	  logger.debug("...created user \"" + username + "\" with UID " + String.valueOf(new_uid));
+	  logger.debug("...created user \"" + username + "\" with UID " + new_uid);
 
 	// add a UserPrefs record for this user, too
 	sql.setLength(0);
@@ -974,9 +978,8 @@ public class VeniceEngineImpl implements VeniceEngine, EngineBackend
   public List searchForUsers(int field, int mode, String term, int offset, int count) throws DataException
   {
     if (logger.isDebugEnabled())
-      logger.debug("User search: field = " + String.valueOf(field) + ", mode = " + String.valueOf(mode)
-		   + ", term '" + term + "', offset = " + String.valueOf(offset) + ", count = "
-		   + String.valueOf(count));
+      logger.debug("User search: field = " + field + ", mode = " + mode + ", term '" + term + "', offset = "
+		   + offset + ", count = " + count);
 
     Vector rc = new Vector();    // return from this function
     Connection conn = null;      // pooled database connection
@@ -985,11 +988,9 @@ public class VeniceEngineImpl implements VeniceEngine, EngineBackend
     { // get a database connection
       conn = datapool.getConnection();
       Statement stmt = conn.createStatement();
-      StringBuffer sql = new StringBuffer("SELECT u.uid AS uid, u.username AS username, u.description "
-					  + "AS description, c.given_name AS given_name, c.family_name AS "
-					  + "family_name, c.locality AS locality, c.region AS region, "
-					  + "c.country AS country FROM users u, contacts c WHERE "
-					  + "u.contactid = c.contactid AND ");
+      StringBuffer sql = new StringBuffer("SELECT u.uid, u.username, u.description, c.given_name, "
+					  + "c.family_name, c.locality, c.region, c.country FROM users u, "
+					  + "contacts c WHERE u.contactid = c.contactid AND ");
 
       switch (field)
       { // determine which field to search on
@@ -1044,10 +1045,8 @@ public class VeniceEngineImpl implements VeniceEngine, EngineBackend
 
       while (rs.next())
       { // add all the found users to the list
-	UserFoundImpl ufi = new UserFoundImpl(rs.getInt("uid"),rs.getString("username"),
-					      rs.getString("description"),rs.getString("given_name"),
-					      rs.getString("family_name"),rs.getString("locality"),
-					      rs.getString("region"),rs.getString("country"));
+	UserFoundImpl ufi = new UserFoundImpl(rs.getInt(1),rs.getString(2),rs.getString(3),rs.getString(4),
+					      rs.getString(5),rs.getString(6),rs.getString(7),rs.getString(8));
 	UserFound tmp = (UserFound)ufi;
 	rc.add(tmp);
 
@@ -1074,8 +1073,7 @@ public class VeniceEngineImpl implements VeniceEngine, EngineBackend
   public int getSearchUserCount(int field, int mode, String term) throws DataException
   {
     if (logger.isDebugEnabled())
-      logger.debug("User search: field = " + String.valueOf(field) + ", mode = " + String.valueOf(mode)
-		   + ", term '" + term + "'");
+      logger.debug("User search: field = " + field + ", mode = " + mode + ", term '" + term + "'");
 
     Connection conn = null;      // pooled database connection
 
@@ -1083,8 +1081,8 @@ public class VeniceEngineImpl implements VeniceEngine, EngineBackend
     { // get a database connection
       conn = datapool.getConnection();
       Statement stmt = conn.createStatement();
-      StringBuffer sql = new StringBuffer("SELECT COUNT(*) AS total FROM users u, contacts c WHERE "
-					  + "u.contactid = c.contactid AND ");
+      StringBuffer sql = new StringBuffer("SELECT COUNT(*) FROM users u, contacts c WHERE u.contactid = "
+					  + "c.contactid AND ");
 
       switch (field)
       { // determine which field to search on
@@ -1140,7 +1138,7 @@ public class VeniceEngineImpl implements VeniceEngine, EngineBackend
       if (!(rs.next()))
 	throw new InternalStateError("getSearchUserCount search failure (MUST have 1 row!)");
 
-      return rs.getInt("total");
+      return rs.getInt(1);
 
     } // end try
     catch (SQLException e)
@@ -1160,7 +1158,7 @@ public class VeniceEngineImpl implements VeniceEngine, EngineBackend
 
   public int getStdNumSearchResults()
   {
-    return 20;  // TODO: make this a config file option
+    return gp_ints[IP_MAXSEARCHRETURN];
 
   } // end getStdNumSearchResults
 
@@ -1245,6 +1243,18 @@ public class VeniceEngineImpl implements VeniceEngine, EngineBackend
 
   } // end getNumOldPostsBeforeNew
 
+  public int getMaxNumConferenceMembersDisplay()
+  {
+    return gp_ints[IP_MAXCONFMEMBERDISPLAY];
+
+  } // end getMaxNumConferenceMembersDisplay
+
+  public int getMaxNumSIGMembersDisplay()
+  {
+    return gp_ints[IP_MAXSIGMEMBERDISPLAY];
+
+  } // end getMaxNumSIGMembersDisplay
+
   /*--------------------------------------------------------------------------------
    * Implementations from interface EngineBackend
    *--------------------------------------------------------------------------------
@@ -1357,11 +1367,11 @@ public class VeniceEngineImpl implements VeniceEngine, EngineBackend
 
   } // end getLanguageNameForCode
 
-  public SIGData getSIGDataObject(int sigid) throws DataException
+  public synchronized SIGData getSIGDataObject(int sigid) throws DataException
   {
     checkInitialized();
     if (logger.isDebugEnabled())
-      logger.debug("getSIGDataObject(" + String.valueOf(sigid) + ")...");
+      logger.debug("getSIGDataObject(" + sigid + ")...");
 
     Integer the_sigid = new Integer(sigid);
     SIGData sd = (SIGData)(sig_objects.get(the_sigid));
@@ -1385,6 +1395,25 @@ public class VeniceEngineImpl implements VeniceEngine, EngineBackend
 
   } // end getSIGDataObject
 
+  public synchronized void detachSIGDataObject(int sigid)
+  {
+    checkInitialized();
+    if (logger.isDebugEnabled())
+      logger.debug("detachSIGDataObject(" + sigid + ")...");
+
+    Integer the_sigid = new Integer(sigid);
+    SIGData sd = (SIGData)(sig_objects.get(the_sigid));
+    if (sd!=null)
+    { // pull the reference out of our hashtable
+      sig_objects.remove(the_sigid);
+      sd.rd_release();
+      if (logger.isDebugEnabled())
+	logger.debug("...reference detached");
+      
+    } // end if
+
+  } // end detachSIGDataObject
+
   public BitSet getLockedFeaturesMask()
   {
     checkInitialized();
@@ -1420,7 +1449,7 @@ public class VeniceEngineImpl implements VeniceEngine, EngineBackend
       } // end if and for
 
     if (logger.isDebugEnabled())
-      logger.debug("getSIGFeatureSet() loaded " + String.valueOf(rc.size()) + " elements");
+      logger.debug("getSIGFeatureSet() loaded " + rc.size() + " elements");
 
     return new ReadOnlyVector(rc);  // wrap the vector for return
 
@@ -1431,14 +1460,14 @@ public class VeniceEngineImpl implements VeniceEngine, EngineBackend
     checkInitialized();
     if ((code<0) || (code>=features.length))
     { // the index is out of bounds!
-      logger.error("getAppletForFeature(" + String.valueOf(code) + ") => out of range");
+      logger.error("getAppletForFeature(" + code + ") => out of range");
       throw new IndexOutOfBoundsException("invalid feature code");
 
     } // end if
 
     String rc = features[code].getApplet();
     if (logger.isDebugEnabled())
-      logger.debug("getAppletForFeature(" + String.valueOf(code) + ") => \"" + rc + "\"");
+      logger.debug("getAppletForFeature(" + code + ") => \"" + rc + "\"");
     return rc;
 
   } // end getAppletForFeature
@@ -1463,15 +1492,15 @@ public class VeniceEngineImpl implements VeniceEngine, EngineBackend
 
   } // end getDefaultFeaturesMask
 
-  public void registerNewSIG(SIGData sig)
+  public synchronized void registerNewSIG(SIGData sig)
   {
     checkInitialized();
     if (logger.isDebugEnabled())
-      logger.debug("registerNewSIG(" + String.valueOf(sig.getID()) + ")...");
+      logger.debug("registerNewSIG(" + sig.getID() + ")...");
 
     Integer the_sigid = new Integer(sig.getID());
     if (sig_objects.get(the_sigid)!=null)
-      throw new InternalStateError("SIGID " + the_sigid.toString() + " already exists...but it CAN'T HAVE!");
+      throw new InternalStateError("SIGID " + the_sigid + " already exists...but it CAN'T HAVE!");
 
     // throw an extra reference on it and dump it in the object cache
     sig.rd_addRef();
@@ -1501,11 +1530,11 @@ public class VeniceEngineImpl implements VeniceEngine, EngineBackend
 
   } // end canAccessFeature
 
-  public ConferenceData getConferenceDataObject(int confid) throws DataException
+  public synchronized ConferenceData getConferenceDataObject(int confid) throws DataException
   {
     checkInitialized();
     if (logger.isDebugEnabled())
-      logger.debug("getConferenceDataObject(" + String.valueOf(confid) + ")...");
+      logger.debug("getConferenceDataObject(" + confid + ")...");
 
     Integer the_confid = new Integer(confid);
     ConferenceData cd = (ConferenceData)(conf_objects.get(the_confid));
@@ -1529,6 +1558,25 @@ public class VeniceEngineImpl implements VeniceEngine, EngineBackend
 
   } // end getConferenceDataObject
 
+  public synchronized void detachConferenceDataObject(int confid)
+  {
+    checkInitialized();
+    if (logger.isDebugEnabled())
+      logger.debug("detachConferenceDataObject(" + confid + ")...");
+
+    Integer the_confid = new Integer(confid);
+    ConferenceData cd = (ConferenceData)(conf_objects.get(the_confid));
+    if (cd!=null)
+    { // remove it from our hashtable
+      conf_objects.remove(the_confid);
+      cd.rd_release();
+      if (logger.isDebugEnabled())
+	logger.debug("...detached reference");
+
+    } // end if
+
+  } // end detachConferenceDataObject
+
   public void saveAuditRecord(AuditRecord ar)
   {
     checkInitialized();
@@ -1557,15 +1605,15 @@ public class VeniceEngineImpl implements VeniceEngine, EngineBackend
 
   } // end saveAuditRecord
 
-  public void registerNewConference(ConferenceData conf)
+  public synchronized void registerNewConference(ConferenceData conf)
   {
     checkInitialized();
     if (logger.isDebugEnabled())
-      logger.debug("registerNewConference(" + String.valueOf(conf.getID()) + ")...");
+      logger.debug("registerNewConference(" + conf.getID() + ")...");
 
     Integer the_confid = new Integer(conf.getID());
     if (conf_objects.get(the_confid)!=null)
-      throw new InternalStateError("ConfID " + the_confid.toString() + " already exists...but it CAN'T HAVE!");
+      throw new InternalStateError("ConfID " + the_confid + " already exists...but it CAN'T HAVE!");
 
     // throw an extra reference on it and dump it in the object cache
     conf.rd_addRef();

src/com/silverwrist/venice/security/Audit.java

@@ -59,5 +59,6 @@ public interface Audit
   public static final int SCRIBBLE_MESSAGE = 312;
   public static final int NUKE_MESSAGE = 313;
   public static final int UPLOAD_ATTACHMENT = 314;
+  public static final int DELETE_CONF = 315;
 
 } // end interface Audit

src/com/silverwrist/venice/security/Role.java

@@ -63,6 +63,7 @@ public class Role implements Comparable, SecLevels
    *--------------------------------------------------------------------------------
    */
 
+  private static Role not_in_list = null;
   private static Role no_access = null;
   private static Role unrestricted_user = null;
   private static Vector global_low = null;
@@ -99,6 +100,9 @@ public class Role implements Comparable, SecLevels
 
   private static void initAllSets()
   {
+    if (not_in_list==null)
+      not_in_list = new Role(0,"(not in list)");
+
     if (no_access==null)
       no_access = new Role(NO_ACCESS,"No Access");
 
@@ -343,4 +347,18 @@ public class Role implements Comparable, SecLevels
 
   } // end getConferenceDeleteList
 
+  public static List getConferenceMemberLevelChoices()
+  {
+    initAllSets();
+    Vector rc = new Vector();
+    rc.add(not_in_list);
+    rc.addAll(global_low);
+    rc.addAll(sig_low);
+    rc.addAll(conf_low);
+    rc.add(unrestricted_user);
+    rc.add(conf_high.lastElement());
+    return new ReadOnlyVector(rc);
+
+  } // end getConferenceMemberLevelChoices
+
 } // end class Role

src/com/silverwrist/venice/servlets/ConfOperations.java

@@ -18,6 +18,7 @@
 package com.silverwrist.venice.servlets;
 
 import java.io.*;
+import java.util.*;
 import javax.servlet.*;
 import javax.servlet.http.*;
 import org.apache.log4j.*;
@@ -33,6 +34,9 @@ public class ConfOperations extends VeniceServlet
    *--------------------------------------------------------------------------------
    */
 
+  private static final String DELETE_CONFIRM_ATTR = "servlets.ConfOperations.delete.confirm";
+  private static final String DELETE_CONFIRM_PARAM = "confirm";
+
   private static Category logger = Category.getInstance(ConfOperations.class.getName());
 
   /*--------------------------------------------------------------------------------
@@ -174,6 +178,11 @@ public class ConfOperations extends VeniceServlet
 	conf.fixSeen();
 
       } // end try
+      catch (AccessError ae)
+      { // some sort of access error - display an error dialog
+	return new ErrorBox("Access Error",ae.getMessage(),on_error);
+
+      } // end catch
       catch (DataException de)
       { // some sort of error in the database
 	return new ErrorBox("Database Error","Database error catching up conference: " + de.getMessage(),
@@ -282,9 +291,84 @@ public class ConfOperations extends VeniceServlet
 			    on_error);
 
       } // end catch
+      catch (AccessError ae)
+      { // some sort of access error - display an error dialog
+	return new ErrorBox("Access Error",ae.getMessage(),on_error);
+
+      } // end catch
 
     } // end if ("RP" and "RR" commands)
 
+    if (cmd.equals("M"))
+    { // "M" - Manage Conference Membership (requires conference parameter)
+      ConferenceContext conf = getConferenceParameter(request,sig,true,on_error);
+      on_error = "confops?sig=" + sig.getSIGID() + "&conf=" + conf.getConfID() + "&cmd=Q";
+
+      try
+      { // display the conference member list!
+	ConferenceMembership m = new ConferenceMembership(engine,sig,conf);
+	m.doConferenceMemberList();
+	setMyLocation(request,"confops?sig=" + sig.getSIGID() + "&conf=" + conf.getConfID() + "&cmd=M");
+	return m;
+
+      } // end try
+      catch (DataException de)
+      { // something wrong in the database
+	return new ErrorBox("Database Error","Database error listing conference members: " + de.getMessage(),
+			    on_error);
+
+      } // end catch
+      catch (AccessError ae)
+      { // some lack of access is causing problems
+	return new ErrorBox("Access Error",ae.getMessage(),on_error);
+
+      } // end catch
+
+    } // end if ("M" command)
+
+    if (cmd.equals("DEL"))
+    { // "DEL" = "Delete Conference (requires conference parameter)
+      ConferenceContext conf = getConferenceParameter(request,sig,true,on_error);
+      on_error = "confops?sig=" + sig.getSIGID() + "&conf=" + conf.getConfID() + "&cmd=Q";
+
+      if (!(conf.canDeleteConference()))
+	return new ErrorBox("Access Error","You do not have permission to delete this conference.",on_error);
+
+      if (ConfirmBox.isConfirmed(request,DELETE_CONFIRM_ATTR,DELETE_CONFIRM_PARAM))
+      { // we are confirmed - delete the conference!
+	try
+	{ // tell it to go away
+	  conf.delete();
+
+	} // end try
+	catch (DataException de)
+	{ // something wrong in the database
+	  return new ErrorBox("Database Error","Database error deleting conference: " + de.getMessage(),
+			      on_error);
+
+	} // end catch
+	catch (AccessError ae)
+	{ // some lack of access is causing problems
+	  return new ErrorBox("Access Error",ae.getMessage(),on_error);
+
+	} // end catch
+
+	// that's it - trap back to the main conference list
+	throw new RedirectResult("confops?sig=" + sig.getSIGID());
+
+      } // end if
+      else
+      { // generate a confirmation box and wait for confirmation
+	String message = "You are about to permanently delete the \"" + conf.getName() + "\" conference!  "
+	               + "Are you sure you want to do this?";
+	return new ConfirmBox(request,DELETE_CONFIRM_ATTR,DELETE_CONFIRM_PARAM,"Delete Conference",message,
+			      "confops?sig=" + sig.getSIGID() + "&conf=" + conf.getConfID() + "&cmd=DEL",
+			      on_error);
+
+      } // end else
+
+    } // end if ("DEL" command)
+
     // Any unrecognized command shows us the conference list.
     on_error = "sigprofile?sig=" + sig.getSIGID();
     try
@@ -572,6 +656,124 @@ public class ConfOperations extends VeniceServlet
       
     } // end if ("A" command)
 
+    if (cmd.equals("M"))
+    { // "M" - Manage Conference Membership (requires conference parameter)
+      ConferenceContext conf = getConferenceParameter(request,sig,true,on_error);
+      on_error = "confops?sig=" + sig.getSIGID() + "&conf=" + conf.getConfID() + "&cmd=M";
+
+      if (isImageButtonClicked(request,"update"))
+      { // the "update" command that changes all the security levels
+	HashMap org_vals = new HashMap();
+	HashMap new_vals = new HashMap();
+	try
+	{ // retrieve all parameters and filter them for the levels
+	  Enumeration p_names = request.getParameterNames();
+	  while (p_names.hasMoreElements())
+	  { // examine each parameter name in turn
+	    String p_name = (String)(p_names.nextElement());
+	    if (p_name.startsWith("zxcur_"))
+	    { // this is a current value (from a hidden field)
+	      int uid = Integer.parseInt(p_name.substring(6));
+	      int level = Integer.parseInt(request.getParameter(p_name));
+	      org_vals.put(new Integer(uid),new Integer(level));
+
+	    } // end if
+	    else if (p_name.startsWith("zxnew_"))
+	    { // this is a new value (from a dropdown list box)
+	      int uid = Integer.parseInt(p_name.substring(6));
+	      int level = Integer.parseInt(request.getParameter(p_name));
+	      new_vals.put(new Integer(uid),new Integer(level));
+
+	    } // end else if
+
+	  } // end while
+
+	  if (org_vals.size()!=new_vals.size())
+	    return new ErrorBox(null,"Invalid parameters.",on_error);
+
+	} // end try
+	catch (NumberFormatException nfe)
+	{ // error converting the parameters
+	  return new ErrorBox(null,"Invalid parameter conversion.",on_error);
+
+	} // end catch
+
+	try
+	{ // loop through the hashmaps and set the value
+	  Iterator it = org_vals.keySet().iterator();
+	  while (it.hasNext())
+	  { // extract the UID, old level, and new level
+	    Integer uid = (Integer)(it.next());
+	    Integer org_level = (Integer)(org_vals.get(uid));
+	    Integer new_level = (Integer)(new_vals.get(uid));
+	    if (new_level==null)   // whoops
+	      return new ErrorBox(null,"Invalid new level parameter.",on_error);
+	    int new_level_x = new_level.intValue();
+	    if (new_level_x==0)
+	      new_level_x = -1;
+
+	    // call down to set the membership level
+	    if (org_level.intValue()!=new_level_x)
+	      conf.setMembership(uid.intValue(),new_level_x);
+
+	  } // end while
+
+	} // end try
+	catch (AccessError ae)
+	{ // some sort of access error - display an error dialog
+	  return new ErrorBox("Access Error",ae.getMessage(),on_error);
+
+	} // end catch
+	catch (DataException de)
+	{ // database error creating the conference
+	  return new ErrorBox("Database Error","Database error setting memberships: " + de.getMessage(),
+			      on_error);
+
+	} // end catch
+	
+	// trap back to the conference membership display
+	throw new RedirectResult(on_error);
+
+      } // end if ("update" clicked)
+
+      if (   isImageButtonClicked(request,"search") || isImageButtonClicked(request,"previous")
+	  || isImageButtonClicked(request,"next"))
+      { // create the new dialog box
+	ConferenceMembership m = new ConferenceMembership(engine,sig,conf);
+
+	try
+	{ // perform the search!
+	  m.doSearch(request);
+
+	} // end try
+	catch (ValidationException ve)
+	{ // validation error - throw it back to the user
+	  return new ErrorBox(null,ve.getMessage() + " Please try again.",on_error);
+
+	} // end catch
+	catch (AccessError ae)
+	{ // some sort of access error - display an error dialog
+	  return new ErrorBox("Access Error",ae.getMessage(),on_error);
+
+	} // end catch
+	catch (DataException de)
+	{ // database error creating the conference
+	  return new ErrorBox("Database Error","Database error updating conference: " + de.getMessage(),
+			      on_error);
+
+	} // end catch
+
+	setMyLocation(request,on_error);
+	return m;
+
+      } // end if (search function clicked)
+
+      // we don't know what button was pressed
+      logger.error("no known button click on ConfOperations.doPost, cmd=M");
+      return new ErrorBox("Internal Error","Unknown command button pressed",on_error);
+
+    } // end if ("M" command)
+
     // unrecognized command!
     logger.error("invalid command to ConfOperations.doPost: " + cmd);
     return new ErrorBox("Internal Error","Invalid command to ConfOperations.doPost",on_error);

src/com/silverwrist/venice/servlets/format/ConferenceActivity.java

@@ -47,7 +47,8 @@ public class ConferenceActivity implements JSPRender
    *--------------------------------------------------------------------------------
    */
 
-  public ConferenceActivity(SIGContext sig, ConferenceContext conf, boolean posters) throws DataException
+  public ConferenceActivity(SIGContext sig, ConferenceContext conf, boolean posters)
+      throws DataException, AccessError
   {
     this.sig = sig;
     this.conf = conf;

src/com/silverwrist/venice/servlets/format/ConferenceMembership.java

@@ -0,0 +1,337 @@
+/*
+ * The contents of this file are subject to the Mozilla Public License Version 1.1
+ * (the "License"); you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at <http://www.mozilla.org/MPL/>.
+ * 
+ * Software distributed under the License is distributed on an "AS IS" basis, WITHOUT
+ * WARRANTY OF ANY KIND, either express or implied. See the License for the specific
+ * language governing rights and limitations under the License.
+ * 
+ * The Original Code is the Venice Web Communities System.
+ * 
+ * The Initial Developer of the Original Code is Eric J. Bowersox <erbo@silcom.com>,
+ * for Silverwrist Design Studios.  Portions created by Eric J. Bowersox are
+ * Copyright (C) 2001 Eric J. Bowersox/Silverwrist Design Studios.  All Rights Reserved.
+ * 
+ * Contributor(s): 
+ */
+package com.silverwrist.venice.servlets.format;
+
+import java.io.*;
+import java.util.*;
+import javax.servlet.*;
+import javax.servlet.http.*;
+import com.silverwrist.venice.ValidationException;
+import com.silverwrist.venice.security.Role;
+import com.silverwrist.venice.core.*;
+
+public class ConferenceMembership implements JSPRender, SearchMode
+{
+  /*--------------------------------------------------------------------------------
+   * Static data members
+   *--------------------------------------------------------------------------------
+   */
+
+  // Attribute name for request attribute
+  protected static final String ATTR_NAME = "com.silverwrist.venice.content.ConferenceMembership";
+
+  /*--------------------------------------------------------------------------------
+   * Attributes
+   *--------------------------------------------------------------------------------
+   */
+
+  private VeniceEngine engine;            // reference to the engine
+  private SIGContext sig;                 // the SIG we're in
+  private ConferenceContext conf;         // the conference being listed
+  private List display_list = null;       // list of members to display
+  private boolean conf_members = false;   // is this a list of conference members?
+  private int field = -1;                 // search field
+  private int mode = -1;                  // search mode
+  private String term = null;             // search term
+  private int offset = 0;                 // search result offset
+  private int find_count = -1;            // search results count
+  private List role_choices;              // the list of security roles
+
+  /*--------------------------------------------------------------------------------
+   * Constructors
+   *--------------------------------------------------------------------------------
+   */
+
+  public ConferenceMembership(VeniceEngine engine, SIGContext sig, ConferenceContext conf)
+  {
+    this.engine = engine;
+    this.sig = sig;
+    this.conf = conf;
+    this.role_choices = Role.getConferenceMemberLevelChoices();
+
+  } // end constructor
+
+  /*--------------------------------------------------------------------------------
+   * Internal functions
+   *--------------------------------------------------------------------------------
+   */
+
+  private static int getParamInt(ServletRequest request, String name, int default_val)
+  {
+    String str = request.getParameter(name);
+    if (str==null)
+      return -1;
+
+    try
+    { // parse the integer value
+      return Integer.parseInt(str);
+
+    } // end try
+    catch (NumberFormatException nfe)
+    { // in case of conversion error, return default
+      return default_val;
+
+    } // end catch
+
+  } // end getParamInt
+
+  private static boolean isImageButtonClicked(ServletRequest request, String name)
+  {
+    String val = request.getParameter(name + ".x");
+    return (val!=null);
+
+  } // end isImageButtonClicked
+
+  /*--------------------------------------------------------------------------------
+   * External static functions
+   *--------------------------------------------------------------------------------
+   */
+
+  public static ConferenceMembership retrieve(ServletRequest request)
+  {
+    return (ConferenceMembership)(request.getAttribute(ATTR_NAME));
+
+  } // end retrieve
+
+  /*--------------------------------------------------------------------------------
+   * Implementations from interface VeniceContent
+   *--------------------------------------------------------------------------------
+   */
+
+  public String getPageTitle(RenderData rdat)
+  {
+    return "Membership in Conference " + conf.getName();
+
+  } // end getPageTitle
+
+  /*--------------------------------------------------------------------------------
+   * Implementations from interface JSPRender
+   *--------------------------------------------------------------------------------
+   */
+
+  public void store(ServletRequest request)
+  {
+    request.setAttribute(ATTR_NAME,this);
+
+  } // end store
+
+  public String getTargetJSPName()
+  {
+    return "conf_member.jsp";
+
+  } // end getTargetJSPName
+
+  /*--------------------------------------------------------------------------------
+   * External operations
+   *--------------------------------------------------------------------------------
+   */
+
+  public void doConferenceMemberList() throws DataException, AccessError
+  {
+    this.display_list = conf.getMemberList();
+    this.conf_members = true;
+    this.term = "";
+
+  } // end doConferenceMemberList
+
+  public void doSearch(ServletRequest request) throws ValidationException, DataException, AccessError
+  {
+    // Validate the search field parameter.
+    field = getParamInt(request,"field",FIELD_USER_NAME);
+    if (   (field!=FIELD_USER_NAME) && (field!=FIELD_USER_DESCRIPTION) && (field!=FIELD_USER_GIVEN_NAME)
+	   && (field!=FIELD_USER_FAMILY_NAME))
+      throw new ValidationException("The field search parameter is not valid.");
+
+    // Validate the search mode parameter.
+    mode = getParamInt(request,"mode",SEARCH_PREFIX);
+    if ((mode!=SEARCH_PREFIX) && (mode!=SEARCH_SUBSTRING) && (mode!=SEARCH_REGEXP))
+      throw new ValidationException("The search mode parameter is not valid.");
+
+    // Retrieve the search term parameter.
+    term = request.getParameter("term");
+    if (term==null)
+      term = "";
+
+    // Retrieve the offset and find count parameters.
+    offset = getParamInt(request,"ofs",0);
+    find_count = getParamInt(request,"fcount",-1);
+
+    // Adjust the search return offset based on the command button click.
+    int count = getNumResultsDisplayed();
+    if (isImageButtonClicked(request,"search"))
+      offset = 0;
+    else if (isImageButtonClicked(request,"previous"))
+    { // adjust the offset in the reverse direction
+      offset -= count;
+      if (offset<0)
+	offset = 0;
+
+    } // end else if
+    else if (isImageButtonClicked(request,"next"))
+      offset += count;  // go forwards instead
+    else
+      throw new ValidationException("Unable to determine what action triggered the form.");
+
+    // Perform the search!
+    List intermediate = sig.searchForMembers(field,mode,term,offset,count);
+    if (find_count<0)
+      find_count = sig.getSearchMemberCount(field,mode,term);
+
+    // Create the real display list by getting the conference security levels.
+    Iterator it = intermediate.iterator();
+    Vector rc = new Vector(count+1);
+    while (it.hasNext())
+    { // loop around and find the member level of every one
+      UserFound uf = (UserFound)(it.next());
+      int new_level = conf.getMemberLevel(uf.getUID());
+      if (new_level==-1)
+	new_level = 0;
+      rc.add(uf.createNewLevel(new_level));
+
+    } // end while
+
+    display_list = rc;  // save display list for display
+
+  } // end doSearch
+
+  public int getSIGID()
+  {
+    return sig.getSIGID();
+
+  } // end getSIGID
+
+  public int getConfID()
+  {
+    return conf.getConfID();
+
+  } // end getConfID
+
+  public String getSIGName()
+  {
+    return sig.getName();
+
+  } // end getSIGName
+
+  public String getConfName()
+  {
+    return conf.getName();
+
+  } // end getConfName
+
+  public String getLocator()
+  {
+    return "sig=" + sig.getSIGID() + "&conf=" + conf.getConfID();
+
+  } // end getLocator
+
+  public boolean displayList()
+  {
+    if ((display_list==null) || (display_list.size()==0))
+      return false;
+    if (conf_members && (display_list.size()>engine.getMaxNumConferenceMembersDisplay()))
+      return false;
+    return true;
+
+  } // end displayList
+
+  public boolean conferenceMemberList()
+  {
+    return conf_members;
+
+  } // end conferenceMemberList
+
+  public int getSearchField()
+  {
+    return field;
+
+  } // end getSearchField
+
+  public int getSearchMode()
+  {
+    return mode;
+
+  } // end getSearchMode
+
+  public boolean searchFieldIs(int value)
+  {
+    return (field==value);
+
+  } // end searchFieldIs
+
+  public boolean searchModeIs(int value)
+  {
+    return (mode==value);
+
+  } // end searchModeIs
+
+  public String getSearchTerm()
+  {
+    return term;
+
+  } // end getSearchTerm
+
+  public int getFindCount()
+  {
+    return find_count;
+
+  } // end getFindCount
+
+  public int getOffset()
+  {
+    return offset;
+
+  } // end getOffset
+
+  public int getSize()
+  {
+    return display_list.size();
+
+  } // end getSize
+
+  public int getNumResultsDisplayed()
+  {
+    return engine.getStdNumSearchResults();
+
+  } // end getNumResultsDisplayed
+
+  public UserFound getItem(int ndx)
+  {
+    return (UserFound)(display_list.get(ndx));
+
+  } // end getItem
+
+  public void outputDropDown(Writer out, int uid, int cur_level) throws IOException
+  {
+    out.write("<INPUT TYPE=HIDDEN NAME=\"zxcur_" + uid + "\" VALUE=\"" + cur_level + "\">\n");
+    out.write("<SELECT NAME=\"zxnew_" + uid + "\" SIZE=1>\n");
+    Iterator it = role_choices.iterator();
+    while (it.hasNext())
+    { // output the <OPTION> lines for the dropdown
+      Role r = (Role)(it.next());
+      out.write("<OPTION VALUE=\"" + r.getLevel() + "\"");
+      if (r.getLevel()==cur_level)
+	out.write(" SELECTED");
+      out.write(">" + r.getName() + "</OPTION>\n");
+
+    } // end while
+
+    out.write("</SELECT>\n");
+
+  } // end outputDropDown
+
+} // end class ConferenceMembership

src/com/silverwrist/venice/servlets/format/ConfirmBox.java

@@ -66,7 +66,7 @@ public class ConfirmBox implements ContentRender
     this.conf_num = rng.nextInt(0x1000000);
     this.title = title;
     this.message = message;
-    this.confirm_url = confirm_url + "&" + param_name + "=" + String.valueOf(this.conf_num);
+    this.confirm_url = confirm_url + "&" + param_name + "=" + this.conf_num;
     this.deny_url = deny_url;
 
     // Stash this object in the HTTP session.

web/format/conf_member.jsp

@@ -0,0 +1,154 @@
+<%--
+  The contents of this file are subject to the Mozilla Public License Version 1.1
+  (the "License"); you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at <http://www.mozilla.org/MPL/>.
+
+  Software distributed under the License is distributed on an "AS IS" basis, WITHOUT
+  WARRANTY OF ANY KIND, either express or implied. See the License for the specific
+  language governing rights and limitations under the License.
+  
+  The Original Code is the Venice Web Communities System.
+  
+  The Initial Developer of the Original Code is Eric J. Bowersox <erbo@silcom.com>,
+  for Silverwrist Design Studios.  Portions created by Eric J. Bowersox are
+  Copyright (C) 2001 Eric J. Bowersox/Silverwrist Design Studios.  All Rights Reserved.
+
+  Contributor(s): 
+--%>
+<%@ page import = "java.util.*" %>
+<%@ page import = "com.silverwrist.util.StringUtil" %>
+<%@ page import = "com.silverwrist.venice.core.*" %>
+<%@ page import = "com.silverwrist.venice.servlets.Variables" %>
+<%@ page import = "com.silverwrist.venice.servlets.format.*" %>
+<%
+  ConferenceMembership data = ConferenceMembership.retrieve(request);
+  Variables.failIfNull(data);
+  RenderData rdat = RenderConfig.createRenderData(application,request,response);
+%>
+<% rdat.writeContentHeader(out,"Set Conference Membership:",data.getConfName()); %>
+<%= rdat.getStdFontTag(null,2) %>
+  <A HREF="<%= rdat.getEncodedServletPath("confops?" + data.getLocator() + "&cmd=Q") %>">Return to
+      Manage Conference Menu</A>
+</FONT><P>
+
+<%= rdat.getStdFontTag(null,3) %><B>Find users in SIG "<%= data.getSIGName() %>":</B></FONT><P>
+<FORM METHOD="POST" ACTION="<%= rdat.getEncodedServletPath("confops") %>">
+  <INPUT TYPE="HIDDEN" NAME="sig" VALUE="<%= data.getSIGID() %>">
+  <INPUT TYPE="HIDDEN" NAME="conf" VALUE="<%= data.getConfID() %>">
+  <INPUT TYPE="HIDDEN" NAME="cmd" VALUE="M">
+  <INPUT TYPE="HIDDEN" NAME="ofs" VALUE="0">
+  <%= rdat.getStdFontTag(null,2) %>
+    Display all SIG members whose&nbsp;&nbsp;
+    <SELECT NAME="field" SIZE=1>
+      <OPTION VALUE="<%= SearchMode.FIELD_USER_NAME %>"
+      <% if (data.searchFieldIs(SearchMode.FIELD_USER_NAME)) { %>SELECTED<% } %> >user name</OPTION>
+      <OPTION VALUE="<%= SearchMode.FIELD_USER_DESCRIPTION %>"
+      <% if (data.searchFieldIs(SearchMode.FIELD_USER_DESCRIPTION)) { %>SELECTED<% } %> >description</OPTION>
+      <OPTION VALUE="<%= SearchMode.FIELD_USER_GIVEN_NAME %>"
+      <% if (data.searchFieldIs(SearchMode.FIELD_USER_GIVEN_NAME)) { %>SELECTED<% } %> >first name</OPTION>
+      <OPTION VALUE="<%= SearchMode.FIELD_USER_FAMILY_NAME %>"
+      <% if (data.searchFieldIs(SearchMode.FIELD_USER_FAMILY_NAME)) { %>SELECTED<% } %> >last name</OPTION>
+    </SELECT><BR>
+
+    <SELECT NAME="mode" SIZE=1>
+      <OPTION VALUE="<%= SearchMode.SEARCH_PREFIX %>"
+      <% if (data.searchModeIs(SearchMode.SEARCH_PREFIX)) { %>SELECTED<% } %> >starts with the string</OPTION>
+      <OPTION VALUE="<%= SearchMode.SEARCH_SUBSTRING %>"
+      <% if (data.searchModeIs(SearchMode.SEARCH_SUBSTRING)) { %>SELECTED<% } %> >contains the string</OPTION>
+      <OPTION VALUE="<%= SearchMode.SEARCH_REGEXP %>"
+      <% if (data.searchModeIs(SearchMode.SEARCH_REGEXP)) { %>SELECTED<% } %> >matches the regular
+      expression</OPTION>
+    </SELECT>
+    <INPUT TYPE=TEXT NAME="term" SIZE=32 MAXLENGTH=255 VALUE="<%= data.getSearchTerm() %>"><BR>
+    <INPUT TYPE=IMAGE NAME="search" SRC="<%= rdat.getFullImagePath("bn_search.gif") %>"
+           ALT="Search" WIDTH=80 HEIGHT=24 BORDER=0><BR>
+  </FONT>
+</FORM>
+
+<% if (data.displayList()) { %>
+  <% int dcount = data.getSize(); %>
+  <HR>
+  <% if (data.conferenceMemberList()) { %>
+    <%-- The conference list header --%>
+    <%= rdat.getStdFontTag(null,3) %><B>
+      Members of Conference "<%= StringUtil.encodeHTML(data.getConfName()) %>":
+    </B></FONT><BR>
+  <% } else { %>
+    <%
+      // Determine the number of results to display and whether to display a "next" button
+      boolean go_next = false;
+      if (dcount>data.getNumResultsDisplayed())
+      { // there's a "next"
+        dcount = data.getNumResultsDisplayed();
+        go_next = true;
+
+      } // end if
+    %>
+    <TABLE WIDTH="100%" BORDER=0 ALIGN=CENTER><TR VALIGN=MIDDLE>
+      <TD WIDTH="50%" ALIGN=LEFT><%= rdat.getStdFontTag(null,2) %>
+        <%-- The search results header --%>
+        <FONT SIZE=+1><B>Search Results:</B></FONT>
+        <% if (data.getFindCount()>0) { %>
+          (Displaying <%= data.getOffset() + 1 %>-<%= data.getOffset() + dcount %> of
+          <%= data.getFindCount() %>)
+        <% } else { %>(None)<% } %>
+      </FONT></TD>
+      <TD WIDTH="50%" ALIGN=RIGHT>
+      <% if (go_next || (data.getOffset()>0)) { %>
+        <%-- The navigational form that allows us to page through the results --%>
+        <% if (rdat.useHTMLComments()) { %><!-- Navigational Form --><% } %>
+        <FORM METHOD="POST" ACTION="<%= rdat.getEncodedServletPath("confops") %>">
+          <INPUT TYPE=HIDDEN NAME="sig" VALUE="<%= data.getSIGID() %>">
+          <INPUT TYPE=HIDDEN NAME="conf" VALUE="<%= data.getConfID() %>">
+          <INPUT TYPE=HIDDEN NAME="cmd" VALUE="M">
+          <INPUT TYPE=HIDDEN NAME="ofs" VALUE="<%= data.getOffset() %>">
+          <INPUT TYPE=HIDDEN NAME="field" VALUE="<%= data.getSearchField() %>">
+          <INPUT TYPE=HIDDEN NAME="mode" VALUE="<%= data.getSearchMode() %>">
+          <INPUT TYPE=HIDDEN NAME="term" VALUE="<%= data.getSearchTerm() %>">
+          <INPUT TYPE=HIDDEN NAME="fcount" VALUE="<%= data.getFindCount() %>">
+          <% if (data.getOffset()>0) { %>
+            <INPUT TYPE=IMAGE NAME="previous" SRC="<%= rdat.getFullImagePath("bn_ar_previous.gif") %>"
+                   ALT="Previous" WIDTH=80 HEIGHT=24 BORDER=0>
+          <% } else { %>
+            <IMG SRC="<%= rdat.getFullImagePath("bn_transparent.gif") %>" WIDTH=80 HEIGHT=24 BORDER=0>
+          <% } // end if %>
+          &nbsp;
+          <% if (go_next) { %>
+            <INPUT TYPE=IMAGE NAME="next" SRC="<%= rdat.getFullImagePath("bn_ar_next.gif") %>"
+                   ALT="Next" WIDTH=80 HEIGHT=24 BORDER=0>
+          <% } else { %>
+            <IMG SRC="<%= rdat.getFullImagePath("bn_transparent.gif") %>" WIDTH=80 HEIGHT=24 BORDER=0>
+          <% } // end if %>
+
+        </FORM>
+      <% } else { %>&nbsp;<% } %>
+      </TD>
+    </TR></TABLE><BR>
+  <% } // end if %>
+
+  <%-- Display the results of the search --%>
+  <FORM METHOD="POST" ACTION="<%= rdat.getEncodedServletPath("confops") %>">
+    <INPUT TYPE=HIDDEN NAME="sig" VALUE="<%= data.getSIGID() %>">
+    <INPUT TYPE=HIDDEN NAME="conf" VALUE="<%= data.getConfID() %>">
+    <INPUT TYPE=HIDDEN NAME="cmd" VALUE="M">
+    <TABLE BORDER=0 ALIGN=LEFT CELLPADDING=0 CELLSPACING=4>
+      <% for (int i=0; i<dcount; i++) { %>
+        <% UserFound uf = data.getItem(i); %>
+        <TR VALIGN=MIDDLE>
+          <TD ALIGN=CENTER WIDTH=14>
+            <IMG SRC="<%= rdat.getFullImagePath("purple-ball.gif") %>" ALT="*" WIDTH=14 HEIGHT=14 BORDER=0>
+          </TD>
+          <TD ALIGN=LEFT><%= rdat.getStdFontTag(null,2) %>
+            <A HREF="<%= rdat.getEncodedServletPath("user/" + uf.getName()) %>"><%= uf.getName() %></A>
+          </FONT></TD>
+          <TD ALIGN=LEFT><%= rdat.getStdFontTag(null,2) %>
+            <% data.outputDropDown(out,uf.getUID(),uf.getLevel()); %>
+          </FONT></TD>
+        </TR>
+      <% } // end for %>
+    </TABLE><BR CLEAR=LEFT>
+    <INPUT TYPE=IMAGE SRC="<%= rdat.getFullImagePath("bn_update.gif") %>" NAME="update" ALT="Update"
+           WIDTH=80 HEIGHT=24 BORDER=0>
+  </FORM><BR>
+<% } // end if %>
+<% rdat.writeFooter(out); %>

web/format/manage_conf.jsp

@@ -59,12 +59,14 @@
         Conference Information</A><P>
     <A HREF="<%= rdat.getEncodedServletPath("confops?" + data.getLocator() + "&cmd=A") %>">Manage
         Conference Aliases</A><P>
-    <A HREF="TODO">Manage Conference Members</A><P>
+    <A HREF="<%= rdat.getEncodedServletPath("confops?" + data.getLocator() + "&cmd=M") %>">Manage
+        Conference Members</A><P>
     <A HREF="<%= rdat.getEncodedServletPath("confops?" + data.getLocator() + "&cmd=RP") %>">Conference
         Posters Report</A><P>
     <A HREF="<%= rdat.getEncodedServletPath("confops?" + data.getLocator() + "&cmd=RR") %>">Conference
         Readers/Lurkers Report</A><P>
-    <A HREF="TODO">Delete Conference</A><P>
+    <A HREF="<%= rdat.getEncodedServletPath("confops?" + data.getLocator() + "&cmd=DEL") %>">Delete
+        Conference</A><P>
   </B></FONT>
 <% } // end if (displaying admin section) %>