added message part add/delete and message create/delete to the UniStore

operations

src/dynamo-framework/com/silverwrist/dynamo/event/MessageCreatedEvent.java

@@ -0,0 +1,46 @@
+/*
+ * 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) 2003 Eric J. Bowersox/Silverwrist Design Studios.  All Rights Reserved.
+ * 
+ * Contributor(s): 
+ */
+package com.silverwrist.dynamo.event;
+
+import com.silverwrist.dynamo.iface.UniStoreMessage;
+
+public class MessageCreatedEvent extends MessageUpdateEvent
+{
+  /*--------------------------------------------------------------------------------
+   * Constructor
+   *--------------------------------------------------------------------------------
+   */
+
+  public MessageCreatedEvent(UniStoreMessage src)
+  {
+    super(src);
+
+  } // end constructor
+
+  /*--------------------------------------------------------------------------------
+   * Overrides from class MessageUpdateEvent
+   *--------------------------------------------------------------------------------
+   */
+
+  public String toString()
+  {
+    return "MessageCreatedEvent: new message ID#" + getMessage().getMessageID();
+
+  } // end toString
+
+} // end class MessageCreatedEvent

src/dynamo-framework/com/silverwrist/dynamo/event/MessageDeletedEvent.java

@@ -0,0 +1,46 @@
+/*
+ * 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) 2003 Eric J. Bowersox/Silverwrist Design Studios.  All Rights Reserved.
+ * 
+ * Contributor(s): 
+ */
+package com.silverwrist.dynamo.event;
+
+import com.silverwrist.dynamo.iface.UniStoreMessage;
+
+public class MessageDeletedEvent extends MessageUpdateEvent
+{
+  /*--------------------------------------------------------------------------------
+   * Constructor
+   *--------------------------------------------------------------------------------
+   */
+
+  public MessageDeletedEvent(UniStoreMessage src)
+  {
+    super(src);
+
+  } // end constructor
+
+  /*--------------------------------------------------------------------------------
+   * Overrides from class MessageUpdateEvent
+   *--------------------------------------------------------------------------------
+   */
+
+  public String toString()
+  {
+    return "MessageDeletedEvent: deleted message ID#" + getMessage().getMessageID();
+
+  } // end toString
+
+} // end class MessageDeletedEvent

src/dynamo-framework/com/silverwrist/dynamo/event/MessagePartAddedEvent.java

@@ -0,0 +1,47 @@
+/*
+ * 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) 2003 Eric J. Bowersox/Silverwrist Design Studios.  All Rights Reserved.
+ * 
+ * Contributor(s): 
+ */
+package com.silverwrist.dynamo.event;
+
+import com.silverwrist.dynamo.iface.UniStorePart;
+
+public class MessagePartAddedEvent extends MessagePartUpdateEvent
+{
+  /*--------------------------------------------------------------------------------
+   * Constructor
+   *--------------------------------------------------------------------------------
+   */
+
+  public MessagePartAddedEvent(UniStorePart src)
+  {
+    super(src);
+
+  } // end constructor
+
+  /*--------------------------------------------------------------------------------
+   * Overrides from class MessagePartUpdateEvent
+   *--------------------------------------------------------------------------------
+   */
+
+  public String toString()
+  {
+    return "MessagePartAddedEvent: message ID#" + getMessagePart().getMessageID() + ", new "
+         + (isBinaryPart() ? "binary" : "text") + " part " + getMessagePart().getPartIdentity();
+
+  } // end toString
+
+} // end class MessagePartAddedEvent

src/dynamo-framework/com/silverwrist/dynamo/event/MessagePartDeletedEvent.java

@@ -0,0 +1,47 @@
+/*
+ * 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) 2003 Eric J. Bowersox/Silverwrist Design Studios.  All Rights Reserved.
+ * 
+ * Contributor(s): 
+ */
+package com.silverwrist.dynamo.event;
+
+import com.silverwrist.dynamo.iface.UniStorePart;
+
+public class MessagePartDeletedEvent extends MessagePartUpdateEvent
+{
+  /*--------------------------------------------------------------------------------
+   * Constructor
+   *--------------------------------------------------------------------------------
+   */
+
+  public MessagePartDeletedEvent(UniStorePart src)
+  {
+    super(src);
+
+  } // end constructor
+
+  /*--------------------------------------------------------------------------------
+   * Overrides from class MessagePartUpdateEvent
+   *--------------------------------------------------------------------------------
+   */
+
+  public String toString()
+  {
+    return "MessagePartDeletedEvent: message ID#" + getMessagePart().getMessageID() + ", deleted "
+         + (isBinaryPart() ? "binary" : "text") + " part " + getMessagePart().getPartIdentity();
+
+  } // end toString
+
+} // end class MessagePartDeletedEvent

src/dynamo-framework/com/silverwrist/dynamo/htmlcheck/RewriteURLs.java

@@ -109,16 +109,16 @@ class RewriteURLs implements HTMLCheckerConfigurator, HTMLRewriter
     try
     { // pre-compile all our regex patterns
       // recognize: http://<host>[:<port>]...
-      l.add(new Match("^http://[A-Za-z0-9-]+(\\.[A-Za-z0-9-]+)*(:[0-9]+)?(/.*)?"));
+      l.add(new Match("^http://[A-Za-z0-9-]+(\\.[A-Za-z0-9-]+)*(:[0-9]+)?(/.*)?$"));
 
       // recognize: ftp://<host>[:<port>]...
-      l.add(new Match("^ftp://[A-Za-z0-9-]+(\\.[A-Za-z0-9-]+)*(:[0-9]+)?(/.*)?"));
+      l.add(new Match("^ftp://[A-Za-z0-9-]+(\\.[A-Za-z0-9-]+)*(:[0-9]+)?(/.*)?$"));
 
       // recognize: gopher://<host>[:<port>]...
-      l.add(new Match("^gopher://[A-Za-z0-9-]+(\\.[A-Za-z0-9-]+)*(:[0-9]+)?(/.*)?"));
+      l.add(new Match("^gopher://[A-Za-z0-9-]+(\\.[A-Za-z0-9-]+)*(:[0-9]+)?(/.*)?$"));
 
-      // recognize: mailto:<valid E-mail address>
+      // recognize: mailto:<valid E-mail address>[?queryinfo]
-      l.add(new Match("^mailto:[A-Za-z0-9!#$%*+-/=?^_`{|}~.]+@[A-Za-z0-9-]+(\\.[A-Za-z0-9-]+)*"));
+      l.add(new Match("^mailto:[A-Za-z0-9!#$%*+-/=?^_`{|}~.]+@[A-Za-z0-9-]+(\\.[A-Za-z0-9-]+)*(\\?.+)?$"));
 
       // recognize: news:<newsgroup name>
       l.add(new Match("^news:[A-Za-z0-9-_]+(\\.[A-Za-z0-9-_]+)*$"));
@@ -137,13 +137,13 @@ class RewriteURLs implements HTMLCheckerConfigurator, HTMLRewriter
       l.add(new Match("^tn3270://[A-Za-z0-9-]+(\\.[A-Za-z0-9-]+)*(:[0-9]+)?$"));
 
       // recognize "www.whatever" and tack http:// onto the front
-      l.add(new Match("^www\\.[A-Za-z0-9-]+(\\.[A-Za-z0-9-]+)*(/.*)?","http://"));
+      l.add(new Match("^www\\.[A-Za-z0-9-]+(\\.[A-Za-z0-9-]+)*(/.*)?$","http://"));
 
       // recognize "ftp.whatever" and tack ftp:// onto the front
-      l.add(new Match("^ftp\\.[A-Za-z0-9-]+(\\.[A-Za-z0-9-]+)*(/.*)?","ftp://"));
+      l.add(new Match("^ftp\\.[A-Za-z0-9-]+(\\.[A-Za-z0-9-]+)*(/.*)?$","ftp://"));
 
       // recognize "gopher.whatever" and tack gopher:// onto the front
-      l.add(new Match("^gopher\\.[A-Za-z0-9-]+(\\.[A-Za-z0-9-]+)*(/.*)?","gopher://"));
+      l.add(new Match("^gopher\\.[A-Za-z0-9-]+(\\.[A-Za-z0-9-]+)*(/.*)?$","gopher://"));
 
     } // end try
     catch (PatternSyntaxException pe)

src/dynamo-framework/com/silverwrist/dynamo/iface/UniStore.java

@@ -23,4 +23,6 @@ public interface UniStore
 {
   public UniStoreMessage getMessage(long msgid) throws DatabaseException;
 
+  public UniStoreMessage createMessage(DynamoUser caller) throws DatabaseException;
+
 } // end interface UniStore

src/dynamo-framework/com/silverwrist/dynamo/iface/UniStoreMessage.java

@@ -17,6 +17,8 @@
  */
 package com.silverwrist.dynamo.iface;
 
+import java.io.InputStream;
+import java.io.IOException;
 import java.security.acl.AclNotFoundException;
 import java.util.Date;
 import java.util.List;
@@ -61,4 +63,19 @@ public interface UniStoreMessage extends SecureObjectStore
 
   public List getBinaryParts() throws DatabaseException;
 
+  public UniStoreTextPart createTextPart(DynamoUser caller, String namespace, String name, String mimetype,
+					 HTMLChecker data) throws DatabaseException, DynamoSecurityException;
+
+  public UniStoreTextPart createTextPart(DynamoUser caller, String namespace, String name, String mimetype,
+					 String data) throws DatabaseException, DynamoSecurityException;
+
+  public UniStoreBinaryPart createBinaryPart(DynamoUser caller, String namespace, String name, DataItem data)
+      throws IOException, DatabaseException, DynamoSecurityException;
+
+  public UniStoreBinaryPart createBinaryPart(DynamoUser caller, String namespace, String name, String mimetype,
+					     String filename, int length, InputStream data)
+      throws DatabaseException, DynamoSecurityException;
+
+  public void delete(DynamoUser caller) throws DatabaseException, DynamoSecurityException;
+
 } // end interface UniStoreMessage

src/dynamo-framework/com/silverwrist/dynamo/iface/UniStorePart.java

@@ -19,6 +19,7 @@ package com.silverwrist.dynamo.iface;
 
 import java.util.Date;
 import com.silverwrist.dynamo.except.DatabaseException;
+import com.silverwrist.dynamo.except.DynamoSecurityException;
 import com.silverwrist.dynamo.util.QualifiedNameKey;
 
 public interface UniStorePart extends SecureObjectStore
@@ -41,4 +42,6 @@ public interface UniStorePart extends SecureObjectStore
 
   public void touchRead() throws DatabaseException;
 
+  public void delete(DynamoUser caller) throws DatabaseException, DynamoSecurityException;
+
 } // end interface UniStorePart

src/dynamo-framework/com/silverwrist/dynamo/unistore/BinaryPartImpl.java

@@ -22,6 +22,7 @@ import java.sql.Blob;
 import java.sql.SQLException;
 import java.util.*;
 import org.apache.commons.collections.*;
+import com.silverwrist.dynamo.Namespaces;
 import com.silverwrist.dynamo.db.NamespaceCache;
 import com.silverwrist.dynamo.event.*;
 import com.silverwrist.dynamo.except.*;
@@ -141,7 +142,7 @@ class BinaryPartImpl implements UniStoreBinaryPart
   private ReferenceMap m_properties;
 
   /*--------------------------------------------------------------------------------
-   * Constructor
+   * Constructors
    *--------------------------------------------------------------------------------
    */
 
@@ -166,6 +167,36 @@ class BinaryPartImpl implements UniStoreBinaryPart
 
   } // end constructor
 
+  BinaryPartImpl(PostDynamicUpdate post, MessageImpl parent, int part, QualifiedNameKey identity)
+  {
+    m_ops = null;
+    m_nscache = null;
+    m_post = post;
+    m_parent = parent;
+    m_part = part;
+    m_identity = identity;
+    m_mimetype = null;
+    m_size = -1;
+    m_filename = null;
+    m_nread = 0;
+    m_lastread = null;
+    m_properties = new ReferenceMap(ReferenceMap.HARD,ReferenceMap.SOFT);
+
+  } // end constructor
+
+  /*--------------------------------------------------------------------------------
+   * Overrides from class Object
+   *--------------------------------------------------------------------------------
+   */
+
+  public String toString()
+  {
+    if (m_ops==null)
+      return "(deleted binary part)";
+    return "message " + m_parent.getMessageID() + ", binary part " + m_identity.toString();
+
+  } // end toString
+
   /*--------------------------------------------------------------------------------
    * Implementations from interface ObjectProvider
    *--------------------------------------------------------------------------------
@@ -180,6 +211,8 @@ class BinaryPartImpl implements UniStoreBinaryPart
    */
   public Object getObject(String namespace, String name)
   {
+    if (m_ops==null)
+      throw new NoSuchObjectException(this.toString(),namespace,name);
     try
     { // convert the namespace name to an ID here
       PropertyKey key = new PropertyKey(m_nscache.namespaceNameToId(namespace),name);
@@ -231,6 +264,8 @@ class BinaryPartImpl implements UniStoreBinaryPart
   public Object setObject(DynamoUser caller, String namespace, String name, Object value)
       throws DatabaseException, DynamoSecurityException
   {
+    if (m_ops==null)
+      throw new DatabaseException(BinaryPartImpl.class,"UniStoreMessages","part.deleted");
     m_parent.testPermission(caller,namespace,"set.property","no.setProperty");
     Object rc = null;
     // convert the namespace name to an ID here
@@ -264,6 +299,8 @@ class BinaryPartImpl implements UniStoreBinaryPart
   public Object removeObject(DynamoUser caller, String namespace, String name)
       throws DatabaseException, DynamoSecurityException
   {
+    if (m_ops==null)
+      throw new DatabaseException(BinaryPartImpl.class,"UniStoreMessages","part.deleted");
     m_parent.testPermission(caller,namespace,"remove.property","no.removeProperty");
     Object rc = null;
     // convert the namespace name to an ID here
@@ -291,6 +328,9 @@ class BinaryPartImpl implements UniStoreBinaryPart
    */
   public Collection getNamespaces() throws DatabaseException
   {
+    if (m_ops==null)
+      return Collections.EMPTY_LIST;
+
     // call through to the database to get the list of namespace IDs
     int[] ids = m_ops.getPropertyNamespaceIDs(m_parent.getMessageID(),m_part);
 
@@ -312,6 +352,9 @@ class BinaryPartImpl implements UniStoreBinaryPart
    */
   public Collection getNamesForNamespace(String namespace) throws DatabaseException
   {
+    if (m_ops==null)
+      return Collections.EMPTY_LIST;
+
     // call through to the database to get the data for this namespace
     int nsid = m_nscache.namespaceNameToId(namespace);
     Map data = m_ops.getAllProperties(m_parent.getMessageID(),m_part,nsid);
@@ -342,7 +385,7 @@ class BinaryPartImpl implements UniStoreBinaryPart
 
   public long getMessageID()
   {
-    return m_parent.getMessageID();
+    return (m_parent==null) ? -1L : m_parent.getMessageID();
 
   } // end getMessageID
 
@@ -390,6 +433,8 @@ class BinaryPartImpl implements UniStoreBinaryPart
 
   public void touchRead() throws DatabaseException
   {
+    if (m_ops==null)
+      throw new DatabaseException(BinaryPartImpl.class,"UniStoreMessages","part.deleted");
     synchronized (this)
     { // touch the database, then the local values
       java.util.Date tmp = m_ops.touchRead(m_parent.getMessageID(),m_part);
@@ -402,6 +447,22 @@ class BinaryPartImpl implements UniStoreBinaryPart
 
   } // end touchRead
 
+  public synchronized void delete(DynamoUser caller) throws DatabaseException, DynamoSecurityException
+  {
+    if (m_ops==null)
+      throw new DatabaseException(BinaryPartImpl.class,"UniStoreMessages","part.deleted");
+    m_parent.testPermission(caller,Namespaces.UNISTORE_PERMISSIONS_NAMESPACE,"delete.part","no.deletePart");
+
+    // Cut this object loose from the parent.
+    m_parent.deletedBinaryPart(m_part,m_identity);
+
+    // Zap it from the database.
+    m_ops.delete(m_parent.getMessageID(),m_part);
+
+    baleeted();  // BALEETED!
+
+  } // end delete
+
   /*--------------------------------------------------------------------------------
    * Implementations from interface DataItem
    *--------------------------------------------------------------------------------
@@ -415,6 +476,14 @@ class BinaryPartImpl implements UniStoreBinaryPart
 
   public InputStream getDataStream() throws IOException
   {
+    if (m_ops==null)
+    { // we've been deleted!
+      IOException ioe = new IOException("Part has been deleted");
+      ioe.initCause(new DatabaseException(BinaryPartImpl.class,"UniStoreMessages","part.deleted"));
+      throw ioe;
+
+    } // end if
+
     try
     { // call through to the database to get the data stream
       return m_ops.getData(m_parent.getMessageID(),m_part);
@@ -432,6 +501,14 @@ class BinaryPartImpl implements UniStoreBinaryPart
 
   public Blob getBlob() throws SQLException
   {
+    if (m_ops==null)
+    { // we've been deleted!
+      SQLException se = new SQLException("Part has been deleted");
+      se.initCause(new DatabaseException(BinaryPartImpl.class,"UniStoreMessages","part.deleted"));
+      throw se;
+
+    } // end if
+
     try
     { // load the data from the database and create the Blob around it
       byte[] data = new byte[m_size];
@@ -461,4 +538,43 @@ class BinaryPartImpl implements UniStoreBinaryPart
    *--------------------------------------------------------------------------------
    */
 
+  /*--------------------------------------------------------------------------------
+   * External operations
+   *--------------------------------------------------------------------------------
+   */
+
+  void resetPartNumber(int new_num)
+  {
+    m_part = new_num;
+
+  } // end resetPartNumber
+
+  /**
+   * Called after the part has been deleted, either alone or through the entire message being deleted.  This
+   * method nulls out the internal data of the object and posts a "part-deleted" notification.<P>
+   * See <A HREF="http://www.homestarrunner.com/sbemail50.html">this page</A> for the source of the method name.
+   */
+  synchronized void baleeted()
+  {
+    // Cut loose most of our data before we post an update event.
+    m_ops = null;
+    m_nscache = null;
+    m_mimetype = null;
+    m_size = -1;
+    m_filename = null;
+    m_nread = 0;
+    m_lastread = null;
+    m_properties.clear();
+
+    // Post the "deleted" notification event.
+    m_post.postUpdate(new MessagePartDeletedEvent(this));
+
+    // Cut loose the rest of our data.
+    m_post = null;
+    m_parent = null;
+    m_part = -1;
+    m_identity = null;
+
+  } // end baleeted
+
 } // end class BinaryPartImpl

src/dynamo-framework/com/silverwrist/dynamo/unistore/BinaryPartOps.java

@@ -59,4 +59,6 @@ abstract class BinaryPartOps extends OpsBase
 
   abstract int getData(long msgid, int part, byte[] here) throws IOException, DatabaseException;
 
+  abstract void delete(long msgid, int part) throws DatabaseException;
+
 } // end class BinaryPartOps

src/dynamo-framework/com/silverwrist/dynamo/unistore/BinaryPartOps_mysql.java

@@ -503,4 +503,57 @@ class BinaryPartOps_mysql extends BinaryPartOps
 
   } // end getData
 
+  void delete(long msgid, int part) throws DatabaseException
+  {
+    Connection conn = null;
+    PreparedStatement stmt = null;
+    Statement stmt2 = null;
+    try
+    { // get a connection
+      conn = getConnection();
+
+      // lock the tables
+      stmt2 = conn.createStatement();
+      stmt2.executeUpdate("LOCK TABLES us_binary WRITE, us_binary_props WRITE;");
+
+      // delete all entries from the main and property tables
+      stmt = conn.prepareStatement("DELETE FROM us_binary WHERE msgid = ? AND part = ?;");
+      stmt.setLong(1,msgid);
+      stmt.setInt(2,part);
+      stmt.executeUpdate();
+      stmt.close();
+      stmt = conn.prepareStatement("DELETE FROM us_binary_prop WHERE msgid = ? AND part = ?;");
+      stmt.setLong(1,msgid);
+      stmt.setInt(2,part);
+      stmt.executeUpdate();
+      stmt.close();
+
+      // renumber all entries above that one to close the gap
+      stmt = conn.prepareStatement("UPDATE us_binary SET part = part - 1 WHERE msgid = ? AND part > ?;");
+      stmt.setLong(1,msgid);
+      stmt.setInt(2,part);
+      stmt.executeUpdate();
+      stmt.close();
+      stmt = conn.prepareStatement("UPDATE us_binary_prop SET part = part - 1 WHERE msgid = ? AND part > ?;");
+      stmt.setLong(1,msgid);
+      stmt.setInt(2,part);
+      stmt.executeUpdate();
+
+    } // end try
+    catch (SQLException e)
+    { // translate to a general DatabaseException
+      throw generalException(e);
+
+    } // end catch
+    finally
+    { // shut everything down
+      MySQLUtils.unlockTables(conn);
+      SQLUtils.shutdown(stmt);
+      SQLUtils.shutdown(stmt2);
+      SQLUtils.shutdown(conn);
+
+    } // end finally
+
+  } // end delete
+
 } // end class BinaryPartOps_mysql

src/dynamo-framework/com/silverwrist/dynamo/unistore/ManagerOps.java

@@ -77,6 +77,8 @@ abstract class ManagerOps extends OpsBase
 
   abstract Map getMessageData(long msgid) throws DatabaseException;
 
+  abstract long createMessage(int creator, java.util.Date postdate) throws DatabaseException;
+
   /*--------------------------------------------------------------------------------
    * External operations
    *--------------------------------------------------------------------------------

src/dynamo-framework/com/silverwrist/dynamo/unistore/ManagerOps_mysql.java

@@ -116,4 +116,43 @@ public class ManagerOps_mysql extends ManagerOps
 
   } // end getMessageData
 
+  long createMessage(int creator, java.util.Date postdate) throws DatabaseException
+  {
+    Connection conn = null;
+    PreparedStatement stmt = null;
+    Statement stmt2 = null;
+    try
+    { // get a connection
+      conn = getConnection();
+
+      // lock the base table
+      stmt2 = conn.createStatement();
+      stmt2.executeUpdate("LOCK TABLES us_head WRITE;");
+
+      // create and execute the INSERT statement
+      stmt = conn.prepareStatement("INSERT INTO us_head (creator, posted) VALUES (?, ?);");
+      stmt.setInt(1,creator);
+      m_utils.setDateTime(stmt,2,postdate);
+      stmt.executeUpdate();
+
+      // return the new message ID
+      return MySQLUtils.getLastInsertLong(conn);
+
+    } // end try
+    catch (SQLException e)
+    { // translate to a general DatabaseException
+      throw generalException(e);
+
+    } // end catch
+    finally
+    { // shut everything down
+      MySQLUtils.unlockTables(conn);
+      SQLUtils.shutdown(stmt);
+      SQLUtils.shutdown(stmt2);
+      SQLUtils.shutdown(conn);
+
+    } // end finally
+
+  } // end createMessage
+
 } // end class ManagerOps_mysql

src/dynamo-framework/com/silverwrist/dynamo/unistore/MessageImpl.java

@@ -17,8 +17,10 @@
  */
 package com.silverwrist.dynamo.unistore;
 
+import java.io.*;
 import java.security.acl.AclNotFoundException;
 import java.util.*;
+import java.util.regex.*;
 import org.apache.commons.collections.*;
 import org.apache.log4j.Logger;
 import com.silverwrist.dynamo.Namespaces;
@@ -39,6 +41,10 @@ class MessageImpl implements UniStoreMessage
 
   private static Logger logger = Logger.getLogger(MessageImpl.class);
 
+  private static final Integer NO_READS = new Integer(0);
+
+  private static Pattern NEWLINES;
+
   /*--------------------------------------------------------------------------------
    * Attributes
    *--------------------------------------------------------------------------------
@@ -92,13 +98,109 @@ class MessageImpl implements UniStoreMessage
 
   } // end constructor
 
+  /*--------------------------------------------------------------------------------
+   * Internal operations
+   *--------------------------------------------------------------------------------
+   */
+
+  private static final int getLineCount(String s)
+  {
+    Matcher m = NEWLINES.matcher(s);
+    int rc = 1;
+    while (m.find())
+      rc++;
+    return rc;
+
+  } // end getLineCount
+
+  private final UniStoreTextPart createTextPart(int nsid, String name, String mimetype, int charcount, int linecount,
+						String text) throws DatabaseException
+  {
+    // Call down to the database to create the part.
+    int partnum = m_ops.createTextPart(m_id,nsid,name,mimetype,charcount,linecount,text);
+
+    // Fake up a parameter buffer to create the part object.
+    Integer key1 = new Integer(partnum);
+    PropertyKey key2 = new PropertyKey(nsid,name);
+    HashMap params = new HashMap();
+    params.put(MessageOps.PARAM_PART,key1);
+    params.put(MessageOps.PARAM_IDENTITY,key2);
+    if (mimetype!=null)
+      params.put(MessageOps.PARAM_MIMETYPE,mimetype);
+    params.put(MessageOps.PARAM_SIZE,new Integer(charcount));
+    params.put(MessageOps.PARAM_LINECOUNT,new Integer(linecount));
+    params.put(MessageOps.PARAM_READS,NO_READS);
+    TextPartImpl rc = new TextPartImpl(m_ops.getTextPartOps(),m_nscache,m_post,this,params);
+    rc.precacheText(text);
+
+    synchronized (this)
+    { // Add the text part to the internal caches.
+      m_part_to_text.put(key1,rc);
+      m_pk_to_text.put(key2,rc);
+      if (m_text_count>=0)
+	m_text_count++;
+
+    } // end synchronized block
+
+    m_post.postUpdate(new MessagePartAddedEvent(rc));
+    return rc;
+
+  } // end createTextPart
+
+  private final UniStoreBinaryPart createBinaryPart(int nsid, String name, String mimetype, String filename,
+						    int length, InputStream data) throws DatabaseException
+  {
+    // Call down to the database to create the part.
+    int partnum = m_ops.createBinaryPart(m_id,nsid,name,mimetype,filename,length,data);
+
+    // Fake up a parameter buffer to create the part object.
+    Integer key1 = new Integer(partnum);
+    PropertyKey key2 = new PropertyKey(nsid,name);
+    HashMap params = new HashMap();
+    params.put(MessageOps.PARAM_PART,key1);
+    params.put(MessageOps.PARAM_IDENTITY,key2);
+    if (mimetype!=null)
+      params.put(MessageOps.PARAM_MIMETYPE,mimetype);
+    params.put(MessageOps.PARAM_SIZE,new Integer(length));
+    if (filename!=null)
+      params.put(MessageOps.PARAM_FILENAME,filename);
+    params.put(MessageOps.PARAM_READS,NO_READS);
+    BinaryPartImpl rc = new BinaryPartImpl(m_ops.getBinaryPartOps(),m_nscache,m_post,this,params);
+
+    synchronized (this)
+    { // Add the binary part to the internal caches.
+      m_part_to_binary.put(key1,rc);
+      m_pk_to_binary.put(key2,rc);
+      if (m_binary_count>=0)
+	m_binary_count++;
+
+    } // end synchronized block
+
+    m_post.postUpdate(new MessagePartAddedEvent(rc));
+    return rc;
+
+  } // end createBinaryPart
+
+  /*--------------------------------------------------------------------------------
+   * Overrides from class Object
+   *--------------------------------------------------------------------------------
+   */
+
+  public String toString()
+  {
+    if (m_ops==null)
+      return "(deleted message)";
+    return "message " + m_id;
+
+  } // end toString
+
   /*--------------------------------------------------------------------------------
    * Implementations from interface ObjectProvider
    *--------------------------------------------------------------------------------
    */
 
   /**
-   * Retrieves an object from this <CODE>ObjectProvider</CODE>.
+   * Retrieves an object from this message's properties.
    *
    * @param namespace The namespace to interpret the name relative to.
    * @param name The name of the object to be retrieved.
@@ -106,6 +208,9 @@ class MessageImpl implements UniStoreMessage
    */
   public Object getObject(String namespace, String name)
   {
+    if (m_ops==null)
+      throw new NoSuchObjectException(this.toString(),namespace,name);
+
     try
     { // convert the namespace name to an ID here
       PropertyKey key = new PropertyKey(m_nscache.namespaceNameToId(namespace),name);
@@ -157,6 +262,8 @@ class MessageImpl implements UniStoreMessage
   public Object setObject(DynamoUser caller, String namespace, String name, Object value)
       throws DatabaseException, DynamoSecurityException
   {
+    if (m_ops==null)
+      throw new DatabaseException(MessageImpl.class,"UniStoreMessages","message.deleted");
     testPermission(caller,namespace,"set.property","no.setProperty");
     Object rc = null;
     // convert the namespace name to an ID here
@@ -190,6 +297,8 @@ class MessageImpl implements UniStoreMessage
   public Object removeObject(DynamoUser caller, String namespace, String name)
       throws DatabaseException, DynamoSecurityException
   {
+    if (m_ops==null)
+      throw new DatabaseException(MessageImpl.class,"UniStoreMessages","message.deleted");
     testPermission(caller,namespace,"remove.property","no.removeProperty");
     Object rc = null;
     // convert the namespace name to an ID here
@@ -217,6 +326,9 @@ class MessageImpl implements UniStoreMessage
    */
   public Collection getNamespaces() throws DatabaseException
   {
+    if (m_ops==null)
+      return Collections.EMPTY_LIST;
+
     // call through to the database to get the list of namespace IDs
     int[] ids = m_ops.getPropertyNamespaceIDs(m_id);
 
@@ -238,6 +350,9 @@ class MessageImpl implements UniStoreMessage
    */
   public Collection getNamesForNamespace(String namespace) throws DatabaseException
   {
+    if (m_ops==null)
+      return Collections.EMPTY_LIST;
+
     // call through to the database to get the data for this namespace
     int nsid = m_nscache.namespaceNameToId(namespace);
     Map data = m_ops.getAllProperties(m_id,nsid);
@@ -320,7 +435,9 @@ class MessageImpl implements UniStoreMessage
 
   public DynamoUser getCreator() throws DatabaseException
   {
-    return m_users.getUser(m_creator);
+    if (m_ops==null)
+      throw new DatabaseException(MessageImpl.class,"UniStoreMessages","message.deleted");
+    return (m_users==null) ? null : m_users.getUser(m_creator);
 
   } // end getCreator
 
@@ -332,6 +449,11 @@ class MessageImpl implements UniStoreMessage
 
   public DynamoAcl getAcl() throws DatabaseException, AclNotFoundException
   {
+    if (m_ops==null)
+      throw new DatabaseException(MessageImpl.class,"UniStoreMessages","message.deleted");
+    if ((m_aclid<0) || (m_srm==null))
+      return null;
+    else
       return m_srm.getAcl(m_aclid);
 
   } // end getAcl
@@ -355,6 +477,8 @@ class MessageImpl implements UniStoreMessage
 
   public synchronized int getNumTextParts() throws DatabaseException
   {
+    if (m_ops==null)
+      throw new DatabaseException(MessageImpl.class,"UniStoreMessages","message.deleted");
     if (m_text_count<0)
       m_text_count = m_ops.getNumTextParts(m_id);
     return m_text_count;
@@ -363,6 +487,8 @@ class MessageImpl implements UniStoreMessage
 
   public synchronized int getNumBinaryParts() throws DatabaseException
   {
+    if (m_ops==null)
+      throw new DatabaseException(MessageImpl.class,"UniStoreMessages","message.deleted");
     if (m_binary_count<0)
       m_binary_count = m_ops.getNumBinaryParts(m_id);
     return m_binary_count;
@@ -371,6 +497,8 @@ class MessageImpl implements UniStoreMessage
 
   public UniStoreTextPart getTextPart(int index) throws DatabaseException
   {
+    if (m_ops==null)
+      throw new DatabaseException(MessageImpl.class,"UniStoreMessages","message.deleted");
     Integer key = new Integer(index);
     TextPartImpl rc = null;
     synchronized (this)
@@ -408,6 +536,8 @@ class MessageImpl implements UniStoreMessage
 
   public UniStoreTextPart getTextPart(String namespace, String name) throws DatabaseException
   {
+    if (m_ops==null)
+      throw new DatabaseException(MessageImpl.class,"UniStoreMessages","message.deleted");
     PropertyKey key = new PropertyKey(m_nscache.namespaceNameToId(namespace),name);
     TextPartImpl rc = null;
     synchronized (this)
@@ -440,6 +570,8 @@ class MessageImpl implements UniStoreMessage
 
   public UniStoreBinaryPart getBinaryPart(int index) throws DatabaseException
   {
+    if (m_ops==null)
+      throw new DatabaseException(MessageImpl.class,"UniStoreMessages","message.deleted");
     Integer key = new Integer(index);
     BinaryPartImpl rc = null;
     synchronized (this)
@@ -477,6 +609,8 @@ class MessageImpl implements UniStoreMessage
 
   public UniStoreBinaryPart getBinaryPart(String namespace, String name) throws DatabaseException
   {
+    if (m_ops==null)
+      throw new DatabaseException(MessageImpl.class,"UniStoreMessages","message.deleted");
     PropertyKey key = new PropertyKey(m_nscache.namespaceNameToId(namespace),name);
     BinaryPartImpl rc = null;
     synchronized (this)
@@ -509,6 +643,8 @@ class MessageImpl implements UniStoreMessage
 
   public List getTextParts() throws DatabaseException
   {
+    if (m_ops==null)
+      throw new DatabaseException(MessageImpl.class,"UniStoreMessages","message.deleted");
     int n = this.getNumTextParts();
     ArrayList rc = new ArrayList(n);
     for (int i=1; i<=n; i++)
@@ -519,6 +655,8 @@ class MessageImpl implements UniStoreMessage
 
   public List getBinaryParts() throws DatabaseException
   {
+    if (m_ops==null)
+      throw new DatabaseException(MessageImpl.class,"UniStoreMessages","message.deleted");
     int n = this.getNumBinaryParts();
     ArrayList rc = new ArrayList(n);
     for (int i=1; i<=n; i++)
@@ -527,6 +665,140 @@ class MessageImpl implements UniStoreMessage
 
   } // end getBinaryParts
 
+  public UniStoreTextPart createTextPart(DynamoUser caller, String namespace, String name, String mimetype,
+					 HTMLChecker data) throws DatabaseException, DynamoSecurityException
+  {
+    testPermission(caller,Namespaces.UNISTORE_PERMISSIONS_NAMESPACE,"create.textPart","no.createPart");
+    return createTextPart(m_nscache.namespaceNameToId(namespace),name,mimetype,data.getLength(),data.getLines(),
+			  data.getValue());
+
+  } // end createTextPart
+
+  public UniStoreTextPart createTextPart(DynamoUser caller, String namespace, String name, String mimetype,
+					 String data) throws DatabaseException, DynamoSecurityException
+  {
+    testPermission(caller,Namespaces.UNISTORE_PERMISSIONS_NAMESPACE,"create.textPart","no.createPart");
+    return createTextPart(m_nscache.namespaceNameToId(namespace),name,mimetype,data.length(),getLineCount(data),data);
+
+  } // end createTextPart
+
+  public UniStoreBinaryPart createBinaryPart(DynamoUser caller, String namespace, String name, DataItem data)
+      throws IOException, DatabaseException, DynamoSecurityException
+  {
+    testPermission(caller,Namespaces.UNISTORE_PERMISSIONS_NAMESPACE,"create.binaryPart","no.createPart");
+    return createBinaryPart(m_nscache.namespaceNameToId(namespace),name,data.getMimeType(),data.getName(),
+			    data.getSize(),data.getDataStream());
+
+  } // end createBinaryPart
+
+  public UniStoreBinaryPart createBinaryPart(DynamoUser caller, String namespace, String name, String mimetype,
+					     String filename, int length, InputStream data)
+      throws DatabaseException, DynamoSecurityException
+  {
+    testPermission(caller,Namespaces.UNISTORE_PERMISSIONS_NAMESPACE,"create.binaryPart","no.createPart");
+    return createBinaryPart(m_nscache.namespaceNameToId(namespace),name,mimetype,filename,length,data);
+
+  } // end createBinaryPart
+
+  public synchronized void delete(DynamoUser caller) throws DatabaseException, DynamoSecurityException
+  {
+    testPermission(caller,Namespaces.UNISTORE_PERMISSIONS_NAMESPACE,"delete.message","no.deleteMessage");
+
+    // We need to have lists of the text and binary parts on hand before we delete everything, so that we can
+    // send out notifications.  However, not every one of the parts will be in our cache, so we'll need to create
+    // some temporary instances, but use the cached ones whereever feasible.
+    Map pmap = m_ops.listTextParts(m_id);
+    ArrayList text_parts = new ArrayList(pmap.size());
+    Iterator it = pmap.entrySet().iterator();
+    while (it.hasNext())
+    { // look for a matching TextPartImpl
+      Map.Entry ntry = (Map.Entry)(it.next());
+      TextPartImpl p = (TextPartImpl)(m_part_to_text.get(ntry.getKey()));
+      if (p==null)
+	p = (TextPartImpl)(m_pk_to_text.get(ntry.getValue()));
+      if (p==null)
+      { // create a "scratch" instance
+	PropertyKey pk = (PropertyKey)(ntry.getValue());
+	QualifiedNameKey qname = new QualifiedNameKey(m_nscache.namespaceIdToName(pk.getNamespaceID()),pk.getName());
+	p = new TextPartImpl(m_post,this,((Integer)(ntry.getKey())).intValue(),qname);
+
+      } // end if
+
+      text_parts.add(p);
+
+    } // end while
+
+    pmap = m_ops.listBinaryParts(m_id);
+    ArrayList binary_parts = new ArrayList(pmap.size());
+    it = pmap.entrySet().iterator();
+    while (it.hasNext())
+    { // look for a matching BinaryPartImpl
+      Map.Entry ntry = (Map.Entry)(it.next());
+      BinaryPartImpl p = (BinaryPartImpl)(m_part_to_binary.get(ntry.getKey()));
+      if (p==null)
+	p = (BinaryPartImpl)(m_pk_to_binary.get(ntry.getValue()));
+      if (p==null)
+      { // create a "scratch" instance
+	PropertyKey pk = (PropertyKey)(ntry.getValue());
+	QualifiedNameKey qname = new QualifiedNameKey(m_nscache.namespaceIdToName(pk.getNamespaceID()),pk.getName());
+	p = new BinaryPartImpl(m_post,this,((Integer)(ntry.getKey())).intValue(),qname);
+
+      } // end if
+
+      binary_parts.add(p);
+
+    } // end while
+
+    // Delete the message from the database.
+    m_ops.delete(m_id);
+
+    // Cut loose most of our data before we start notifying.
+    m_ops = null;
+    m_nscache = null;
+    m_srm = null;
+    m_users = null;
+    m_parentid = -1;
+    m_seq = -1;
+    m_creator = -1;
+    m_posted = null;
+    m_aclid = -1;
+    m_properties.clear();
+    m_text_count = -1;
+    m_binary_count = -1;
+    m_part_to_text.clear();
+    m_pk_to_text.clear();
+    m_part_to_binary.clear();
+    m_pk_to_binary.clear();
+
+    // Send out the deletion notifications (and clear the data) for all parts.
+    it = text_parts.iterator();
+    while (it.hasNext())
+    { // make sure all of these parts are BALEETED!
+      TextPartImpl p = (TextPartImpl)(it.next());
+      p.baleeted();
+
+    } // end while
+
+    text_parts.clear();
+    it = binary_parts.iterator();
+    while (it.hasNext())
+    { // make sure all of these parts are BALEETED!
+      BinaryPartImpl p = (BinaryPartImpl)(it.next());
+      p.baleeted();
+
+    } // end while
+
+    binary_parts.clear();
+
+    // Send our own "BALEETED!" notification.
+    m_post.postUpdate(new MessageDeletedEvent(this));
+
+    // Now cut loose the rest of our data.
+    m_post = null;
+    m_id = -1;
+
+  } // end delete
+
   /*--------------------------------------------------------------------------------
    * External operations
    *--------------------------------------------------------------------------------
@@ -535,6 +807,8 @@ class MessageImpl implements UniStoreMessage
   void testPermission(DynamoUser caller, String perm_namespace, String perm_name, String fail_message)
       throws DatabaseException, DynamoSecurityException
   {
+    if (m_ops==null)
+      throw new DatabaseException(MessageImpl.class,"UniStoreMessages","message.deleted");
     if (caller.equals(m_srm.getAdminUser()))
       return;  // Administrator can do anything
     if (m_aclid==-1)
@@ -568,4 +842,127 @@ class MessageImpl implements UniStoreMessage
 
   } // end testPermission
 
+  void zeroCounts()
+  {
+    m_text_count = 0;
+    m_binary_count = 0;
+
+  } // end zeroCounts
+
+  void deletedTextPart(int partnum, QualifiedNameKey identity) throws DatabaseException
+  {
+    PropertyKey pk = new PropertyKey(m_nscache.namespaceNameToId(identity.getNamespace()),identity.getName());
+    synchronized (this)
+    { // Remove the entry from the cache reference maps.
+      m_part_to_text.remove(new Integer(partnum));
+      m_pk_to_text.remove(pk);
+      if (m_text_count>=0)
+	m_text_count--;
+
+      // All entries with a part number higher than the deleted part number have to be renumbered downwards.
+      // First, scan through the keyset to find all the appropriate part numbers, get their values, and lock them
+      // into a hard HashMap to keep them in memory while we do this.
+      HashMap temp = new HashMap();
+      Iterator it = m_part_to_text.keySet().iterator();
+      while (it.hasNext())
+      { // get each key in turn and check it
+	Integer key = (Integer)(it.next());
+	if (key.intValue()>partnum)
+	{ // now see if the object's in memory
+	  TextPartImpl obj = (TextPartImpl)(m_part_to_text.get(key));
+	  if (obj!=null)
+	    temp.put(key,obj);
+
+	} // end if
+
+      } // end while
+
+      // Now go through, poke new part numbers into each of these parts, and get them into the parts
+      // mapping correctly.
+      it = temp.entrySet().iterator();
+      while (it.hasNext())
+      { // get each part in turn and deal with it
+	Map.Entry ntry = (Map.Entry)(it.next());
+	m_part_to_text.remove(ntry.getKey());
+	int new_partnum = ((Integer)(ntry.getKey())).intValue() - 1;
+	TextPartImpl obj = (TextPartImpl)(ntry.getValue());
+	obj.resetPartNumber(new_partnum);
+	m_part_to_text.put(new Integer(new_partnum),obj);
+
+      } // end while
+
+      temp.clear();  // release the extra references
+      
+    } // end synchronized block
+
+  } // end deletedTextPart
+
+  void deletedBinaryPart(int partnum, QualifiedNameKey identity) throws DatabaseException
+  {
+    PropertyKey pk = new PropertyKey(m_nscache.namespaceNameToId(identity.getNamespace()),identity.getName());
+    synchronized (this)
+    { // Remove the entry from the cache reference maps.
+      m_part_to_binary.remove(new Integer(partnum));
+      m_pk_to_binary.remove(pk);
+      if (m_binary_count>=0)
+	m_binary_count--;
+
+      // All entries with a part number higher than the deleted part number have to be renumbered downwards.
+      // First, scan through the keyset to find all the appropriate part numbers, get their values, and lock them
+      // into a hard HashMap to keep them in memory while we do this.
+      HashMap temp = new HashMap();
+      Iterator it = m_part_to_binary.keySet().iterator();
+      while (it.hasNext())
+      { // get each key in turn and check it
+	Integer key = (Integer)(it.next());
+	if (key.intValue()>partnum)
+	{ // now see if the object's in memory
+	  BinaryPartImpl obj = (BinaryPartImpl)(m_part_to_binary.get(key));
+	  if (obj!=null)
+	    temp.put(key,obj);
+
+	} // end if
+
+      } // end while
+
+      // Now go through, poke new part numbers into each of these parts, and get them into the parts
+      // mapping correctly.
+      it = temp.entrySet().iterator();
+      while (it.hasNext())
+      { // get each part in turn and deal with it
+	Map.Entry ntry = (Map.Entry)(it.next());
+	m_part_to_binary.remove(ntry.getKey());
+	int new_partnum = ((Integer)(ntry.getKey())).intValue() - 1;
+	BinaryPartImpl obj = (BinaryPartImpl)(ntry.getValue());
+	obj.resetPartNumber(new_partnum);
+	m_part_to_binary.put(new Integer(new_partnum),obj);
+
+      } // end while
+
+      temp.clear();  // release the extra references
+      
+    } // end synchronized block
+
+  } // end deletedBinaryPart
+
+  /*--------------------------------------------------------------------------------
+   * Static initializer
+   *--------------------------------------------------------------------------------
+   */
+
+  static
+  {
+    try
+    { // set up our patterns
+      NEWLINES = Pattern.compile("\\r?\\n?"); // matches CR, LF, or CRLF
+
+    } // end try
+    catch (PatternSyntaxException e)
+    { // just log the error
+      logger.fatal("Pattern compile error in MessageImpl",e);
+
+    } // end catch
+
+  } // end static initializer
+
 } // end class MessageImpl

src/dynamo-framework/com/silverwrist/dynamo/unistore/MessageOps.java

@@ -17,6 +17,7 @@
  */
 package com.silverwrist.dynamo.unistore;
 
+import java.io.*;
 import java.util.*;
 import com.silverwrist.dynamo.db.OpsBase;
 import com.silverwrist.dynamo.except.*;
@@ -112,6 +113,18 @@ abstract class MessageOps extends OpsBase
 
   abstract Map loadBinaryPart(long msgid, PropertyKey identity) throws DatabaseException;
 
+  abstract int createTextPart(long msgid, int nsid, String name, String mimetype, int charcount, int linecount,
+			      String data) throws DatabaseException;
+
+  abstract int createBinaryPart(long msgid, int nsid, String name, String mimetype, String filename, int length,
+				InputStream data) throws DatabaseException;
+
+  abstract void delete(long msgid) throws DatabaseException;
+
+  abstract Map listTextParts(long msgid) throws DatabaseException;
+
+  abstract Map listBinaryParts(long msgid) throws DatabaseException;
+
   /*--------------------------------------------------------------------------------
    * External operations
    *--------------------------------------------------------------------------------

src/dynamo-framework/com/silverwrist/dynamo/unistore/MessageOps_mysql.java

@@ -17,6 +17,7 @@
  */
 package com.silverwrist.dynamo.unistore;
 
+import java.io.*;
 import java.sql.*;
 import java.util.*;
 import com.silverwrist.util.*;
@@ -790,4 +791,286 @@ class MessageOps_mysql extends MessageOps
 
   } // end loadBinaryPart
 
+  int createTextPart(long msgid, int nsid, String name, String mimetype, int charcount, int linecount, String data)
+      throws DatabaseException
+  {
+    Connection conn = null;
+    PreparedStatement stmt = null;
+    Statement stmt2 = null;
+    ResultSet rs = null;
+    try
+    { // get a connection
+      conn = getConnection();
+
+      // lock the table
+      stmt2 = conn.createStatement();
+      stmt2.executeUpdate("LOCK TABLES us_text WRITE;");
+
+      // start by seeing if the identity already exists
+      stmt = conn.prepareStatement("SELECT part FROM us_text WHERE msgid = ? AND ident_nsid = ? AND ident_name = ?;");
+      stmt.setLong(1,msgid);
+      stmt.setInt(2,nsid);
+      stmt.setString(3,name);
+      rs = stmt.executeQuery();
+      if (rs.next())
+      { // identity already exists, throw exception
+	DatabaseException de = new DatabaseException(MessageOps_mysql.class,"UniStoreMessages","part.exists");
+	de.setParameter(0,String.valueOf(msgid));
+	throw de;
+
+      } // end if
+
+      SQLUtils.shutdown(rs);
+      rs = null;
+      SQLUtils.shutdown(stmt);
+
+      // get the part number for this part
+      stmt = conn.prepareStatement("SELECT IFNULL(MAX(part),0) FROM us_text WHERE msgid = ?;");
+      stmt.setLong(1,msgid);
+      rs = stmt.executeQuery();
+      int partnum = SQLUtils.getReturnCountInt(rs,1) + 1;
+
+      SQLUtils.shutdown(rs);
+      rs = null;
+      SQLUtils.shutdown(stmt);
+
+      // perform the insert!
+      stmt = conn.prepareStatement("INSERT INTO us_text (msgid, part, ident_nsid, ident_name, mimetype, charcount, "
+				   + "linecount, data) VALUES (?, ?, ?, ?, ?, ?, ?, ?);");
+      stmt.setLong(1,msgid);
+      stmt.setInt(2,partnum);
+      stmt.setInt(3,nsid);
+      stmt.setString(4,name);
+      stmt.setString(5,mimetype);
+      stmt.setInt(6,charcount);
+      stmt.setInt(7,linecount);
+      stmt.setString(8,data);
+      stmt.executeUpdate();
+
+      return partnum;
+
+    } // end try
+    catch (SQLException e)
+    { // translate to a general DatabaseException
+      throw generalException(e);
+
+    } // end catch
+    finally
+    { // shut everything down
+      MySQLUtils.unlockTables(conn);
+      SQLUtils.shutdown(rs);
+      SQLUtils.shutdown(stmt);
+      SQLUtils.shutdown(stmt2);
+      SQLUtils.shutdown(conn);
+
+    } // end finally
+
+  } // end createTextPart
+
+  int createBinaryPart(long msgid, int nsid, String name, String mimetype, String filename, int length,
+		       InputStream data) throws DatabaseException
+  {
+    Connection conn = null;
+    PreparedStatement stmt = null;
+    Statement stmt2 = null;
+    ResultSet rs = null;
+    try
+    { // get a connection
+      conn = getConnection();
+
+      // lock the table
+      stmt2 = conn.createStatement();
+      stmt2.executeUpdate("LOCK TABLES us_binary WRITE;");
+
+      // start by seeing if the identity already exists
+      stmt = conn.prepareStatement("SELECT part FROM us_binary WHERE msgid = ? AND ident_nsid = ? "
+				   + "AND ident_name = ?;");
+      stmt.setLong(1,msgid);
+      stmt.setInt(2,nsid);
+      stmt.setString(3,name);
+      rs = stmt.executeQuery();
+      if (rs.next())
+      { // identity already exists, throw exception
+	DatabaseException de = new DatabaseException(MessageOps_mysql.class,"UniStoreMessages","part.exists");
+	de.setParameter(0,String.valueOf(msgid));
+	throw de;
+
+      } // end if
+
+      SQLUtils.shutdown(rs);
+      rs = null;
+      SQLUtils.shutdown(stmt);
+
+      // get the part number for this part
+      stmt = conn.prepareStatement("SELECT IFNULL(MAX(part),0) FROM us_binary WHERE msgid = ?;");
+      stmt.setLong(1,msgid);
+      rs = stmt.executeQuery();
+      int partnum = SQLUtils.getReturnCountInt(rs,1) + 1;
+
+      SQLUtils.shutdown(rs);
+      rs = null;
+      SQLUtils.shutdown(stmt);
+
+      // perform the insert!
+      stmt = conn.prepareStatement("INSERT INTO us_binary (msgid, part, ident_nsid, ident_name, mimetype, datalen, "
+				   + "filename, data) VALUES (?, ?, ?, ?, ?, ?, ?, ?);");
+      stmt.setLong(1,msgid);
+      stmt.setInt(2,partnum);
+      stmt.setInt(3,nsid);
+      stmt.setString(4,name);
+      stmt.setString(5,mimetype);
+      stmt.setInt(6,length);
+      stmt.setString(7,filename);
+      stmt.setBinaryStream(8,data,length);
+      stmt.executeUpdate();
+
+      return partnum;
+
+    } // end try
+    catch (SQLException e)
+    { // translate to a general DatabaseException
+      throw generalException(e);
+
+    } // end catch
+    finally
+    { // shut everything down
+      MySQLUtils.unlockTables(conn);
+      SQLUtils.shutdown(rs);
+      SQLUtils.shutdown(stmt);
+      SQLUtils.shutdown(stmt2);
+      SQLUtils.shutdown(conn);
+
+    } // end finally
+
+  } // end createBinaryPart
+
+  void delete(long msgid) throws DatabaseException
+  {
+    Connection conn = null;
+    PreparedStatement stmt = null;
+    Statement stmt2 = null;
+    try
+    { // get a connection
+      conn = getConnection();
+
+      // lock the tables
+      stmt2 = conn.createStatement();
+      stmt2.executeUpdate("LOCK TABLES us_head WRITE, us_prop WRITE, us_text WRITE, us_text_prop WRITE, "
+			  + "us_binary WRITE, us_binary_prop WRITE;");
+
+      // delete all data from the tables
+      stmt = conn.prepareStatement("DELETE FROM us_head WHERE msgid = ?;");
+      stmt.setLong(1,msgid);
+      stmt.executeUpdate();
+      stmt.close();
+      stmt = conn.prepareStatement("DELETE FROM us_prop WHERE msgid = ?;");
+      stmt.setLong(1,msgid);
+      stmt.executeUpdate();
+      stmt.close();
+      stmt = conn.prepareStatement("DELETE FROM us_text WHERE msgid = ?;");
+      stmt.setLong(1,msgid);
+      stmt.executeUpdate();
+      stmt.close();
+      stmt = conn.prepareStatement("DELETE FROM us_text_prop WHERE msgid = ?;");
+      stmt.setLong(1,msgid);
+      stmt.executeUpdate();
+      stmt.close();
+      stmt = conn.prepareStatement("DELETE FROM us_binary WHERE msgid = ?;");
+      stmt.setLong(1,msgid);
+      stmt.executeUpdate();
+      stmt.close();
+      stmt = conn.prepareStatement("DELETE FROM us_binary_prop WHERE msgid = ?;");
+      stmt.setLong(1,msgid);
+      stmt.executeUpdate();
+
+    } // end try
+    catch (SQLException e)
+    { // translate to a general DatabaseException
+      throw generalException(e);
+
+    } // end catch
+    finally
+    { // shut everything down
+      MySQLUtils.unlockTables(conn);
+      SQLUtils.shutdown(stmt);
+      SQLUtils.shutdown(stmt2);
+      SQLUtils.shutdown(conn);
+
+    } // end finally
+
+  } // end delete
+
+  Map listTextParts(long msgid) throws DatabaseException
+  {
+    Connection conn = null;
+    PreparedStatement stmt = null;
+    ResultSet rs = null;
+    try
+    { // get a connection
+      conn = getConnection();
+
+      // run the statement that lists the parts
+      stmt = conn.prepareStatement("SELECT part, ident_nsid, ident_name FROM us_text WHERE msgid = ? ORDER BY part;");
+      stmt.setLong(1,msgid);
+      rs = stmt.executeQuery();
+
+      // create and return the listing
+      TreeMap rc = new TreeMap();
+      while (rs.next())
+	rc.put(new Integer(rs.getInt(1)),new PropertyKey(rs.getInt(2),rs.getString(3)));
+      return rc;
+
+    } // end try
+    catch (SQLException e)
+    { // translate to a general DatabaseException
+      throw generalException(e);
+
+    } // end catch
+    finally
+    { // shut everything down
+      SQLUtils.shutdown(rs);
+      SQLUtils.shutdown(stmt);
+      SQLUtils.shutdown(conn);
+
+    } // end finally
+
+  } // end listTextParts
+
+  Map listBinaryParts(long msgid) throws DatabaseException
+  {
+    Connection conn = null;
+    PreparedStatement stmt = null;
+    ResultSet rs = null;
+    try
+    { // get a connection
+      conn = getConnection();
+
+      // run the statement that lists the parts
+      stmt = conn.prepareStatement("SELECT part, ident_nsid, ident_name FROM us_binary WHERE msgid = ? "
+				   + "ORDER BY part;");
+      stmt.setLong(1,msgid);
+      rs = stmt.executeQuery();
+
+      // create and return the listing
+      TreeMap rc = new TreeMap();
+      while (rs.next())
+	rc.put(new Integer(rs.getInt(1)),new PropertyKey(rs.getInt(2),rs.getString(3)));
+      return rc;
+
+    } // end try
+    catch (SQLException e)
+    { // translate to a general DatabaseException
+      throw generalException(e);
+
+    } // end catch
+    finally
+    { // shut everything down
+      SQLUtils.shutdown(rs);
+      SQLUtils.shutdown(stmt);
+      SQLUtils.shutdown(conn);
+
+    } // end finally
+
+  } // end listTextParts
+
 } // end class MessageOps_mysql

src/dynamo-framework/com/silverwrist/dynamo/unistore/TextPartImpl.java

@@ -21,6 +21,7 @@ import java.io.*;
 import java.lang.ref.*;
 import java.util.*;
 import org.apache.commons.collections.*;
+import com.silverwrist.dynamo.Namespaces;
 import com.silverwrist.dynamo.db.NamespaceCache;
 import com.silverwrist.dynamo.event.*;
 import com.silverwrist.dynamo.except.*;
@@ -49,7 +50,7 @@ class TextPartImpl implements UniStoreTextPart
   private SoftReference m_text = null;
 
   /*--------------------------------------------------------------------------------
-   * Constructor
+   * Constructors
    *--------------------------------------------------------------------------------
    */
 
@@ -76,6 +77,36 @@ class TextPartImpl implements UniStoreTextPart
 
   } // end constructor
 
+  TextPartImpl(PostDynamicUpdate post, MessageImpl parent, int part, QualifiedNameKey identity)
+  {
+    m_ops = null;
+    m_nscache = null;
+    m_post = post;
+    m_parent = parent;
+    m_part = part;
+    m_identity = identity;
+    m_mimetype = null;
+    m_size = -1;
+    m_linecount = -1;
+    m_nread = 0;
+    m_lastread = null;
+    m_properties = new ReferenceMap(ReferenceMap.HARD,ReferenceMap.SOFT);
+
+  } // end constructor
+
+  /*--------------------------------------------------------------------------------
+   * Overrides from class Object
+   *--------------------------------------------------------------------------------
+   */
+
+  public String toString()
+  {
+    if (m_ops==null)
+      return "(deleted text part)";
+    return "message " + m_parent.getMessageID() + ", text part " + m_identity.toString();
+
+  } // end toString
+
   /*--------------------------------------------------------------------------------
    * Implementations from interface ObjectProvider
    *--------------------------------------------------------------------------------
@@ -90,6 +121,8 @@ class TextPartImpl implements UniStoreTextPart
    */
   public Object getObject(String namespace, String name)
   {
+    if (m_ops==null)
+      throw new NoSuchObjectException(this.toString(),namespace,name);
     try
     { // convert the namespace name to an ID here
       PropertyKey key = new PropertyKey(m_nscache.namespaceNameToId(namespace),name);
@@ -141,6 +174,8 @@ class TextPartImpl implements UniStoreTextPart
   public Object setObject(DynamoUser caller, String namespace, String name, Object value)
       throws DatabaseException, DynamoSecurityException
   {
+    if (m_ops==null)
+      throw new DatabaseException(TextPartImpl.class,"UniStoreMessages","part.deleted");
     m_parent.testPermission(caller,namespace,"set.property","no.setProperty");
     Object rc = null;
     // convert the namespace name to an ID here
@@ -174,6 +209,8 @@ class TextPartImpl implements UniStoreTextPart
   public Object removeObject(DynamoUser caller, String namespace, String name)
       throws DatabaseException, DynamoSecurityException
   {
+    if (m_ops==null)
+      throw new DatabaseException(TextPartImpl.class,"UniStoreMessages","part.deleted");
     m_parent.testPermission(caller,namespace,"remove.property","no.removeProperty");
     Object rc = null;
     // convert the namespace name to an ID here
@@ -201,6 +238,9 @@ class TextPartImpl implements UniStoreTextPart
    */
   public Collection getNamespaces() throws DatabaseException
   {
+    if (m_ops==null)
+      return Collections.EMPTY_LIST;
+
     // call through to the database to get the list of namespace IDs
     int[] ids = m_ops.getPropertyNamespaceIDs(m_parent.getMessageID(),m_part);
 
@@ -222,6 +262,9 @@ class TextPartImpl implements UniStoreTextPart
    */
   public Collection getNamesForNamespace(String namespace) throws DatabaseException
   {
+    if (m_ops==null)
+      return Collections.EMPTY_LIST;
+
     // call through to the database to get the data for this namespace
     int nsid = m_nscache.namespaceNameToId(namespace);
     Map data = m_ops.getAllProperties(m_parent.getMessageID(),m_part,nsid);
@@ -252,7 +295,7 @@ class TextPartImpl implements UniStoreTextPart
 
   public long getMessageID()
   {
-    return m_parent.getMessageID();
+    return (m_parent==null) ? -1L : m_parent.getMessageID();
 
   } // end getMessageID
 
@@ -300,6 +343,8 @@ class TextPartImpl implements UniStoreTextPart
 
   public void touchRead() throws DatabaseException
   {
+    if (m_ops==null)
+      throw new DatabaseException(TextPartImpl.class,"UniStoreMessages","part.deleted");
     synchronized (this)
     { // touch the database, then the local values
       java.util.Date tmp = m_ops.touchRead(m_parent.getMessageID(),m_part);
@@ -312,6 +357,22 @@ class TextPartImpl implements UniStoreTextPart
 
   } // end touchRead
 
+  public synchronized void delete(DynamoUser caller) throws DatabaseException, DynamoSecurityException
+  {
+    if (m_ops==null)
+      throw new DatabaseException(TextPartImpl.class,"UniStoreMessages","part.deleted");
+    m_parent.testPermission(caller,Namespaces.UNISTORE_PERMISSIONS_NAMESPACE,"delete.part","no.deletePart");
+
+    // Cut this object loose from the parent.
+    m_parent.deletedTextPart(m_part,m_identity);
+
+    // Zap it from the database.
+    m_ops.delete(m_parent.getMessageID(),m_part);
+
+    baleeted();  // BALEETED!
+
+  } // end delete
+
   /*--------------------------------------------------------------------------------
    * Implementations from interface UniStoreTextPart
    *--------------------------------------------------------------------------------
@@ -325,6 +386,8 @@ class TextPartImpl implements UniStoreTextPart
 
   public synchronized String getText() throws DatabaseException
   {
+    if (m_ops==null)
+      throw new DatabaseException(TextPartImpl.class,"UniStoreMessages","part.deleted");
     String rc = null;
     if (m_text!=null)
       rc = (String)(m_text.get());
@@ -341,8 +404,58 @@ class TextPartImpl implements UniStoreTextPart
 
   public Reader getTextAsReader() throws DatabaseException
   {
+    if (m_ops==null)
+      throw new DatabaseException(TextPartImpl.class,"UniStoreMessages","part.deleted");
     return new StringReader(this.getText());
 
   } // end getTextAsReader
 
+  /*--------------------------------------------------------------------------------
+   * External operations
+   *--------------------------------------------------------------------------------
+   */
+
+  void precacheText(String txt)
+  {
+    m_text = new SoftReference(txt);
+
+  } // end txt
+
+  void resetPartNumber(int new_num)
+  {
+    m_part = new_num;
+
+  } // end resetPartNumber
+
+  /**
+   * Called after the part has been deleted, either alone or through the entire message being deleted.  This
+   * method nulls out the internal data of the object and posts a "part-deleted" notification.<P>
+   * See <A HREF="http://www.homestarrunner.com/sbemail50.html">this page</A> for the source of the method name.
+   */
+  synchronized void baleeted()
+  {
+    // Cut loose most of our data before we post an update event.
+    m_ops = null;
+    m_nscache = null;
+    m_mimetype = null;
+    m_size = -1;
+    m_linecount = -1;
+    m_nread = 0;
+    m_lastread = null;
+    m_properties.clear();
+    if (m_text!=null)
+      m_text.clear();
+    m_text = null;
+
+    // Post the "deleted" notification event.
+    m_post.postUpdate(new MessagePartDeletedEvent(this));
+
+    // Now cut loose the rest of our data.
+    m_post = null;
+    m_parent = null;
+    m_part = -1;
+    m_identity = null;
+
+  } // end baleeted
+
 } // end class TextPartImpl

src/dynamo-framework/com/silverwrist/dynamo/unistore/TextPartOps.java

@@ -55,4 +55,6 @@ abstract class TextPartOps extends OpsBase
 
   abstract String getText(long msgid, int part) throws DatabaseException;
 
+  abstract void delete(long msgid, int part) throws DatabaseException;
+
 } // end class TextPartOps

src/dynamo-framework/com/silverwrist/dynamo/unistore/TextPartOps_mysql.java

@@ -455,4 +455,57 @@ class TextPartOps_mysql extends TextPartOps
 
   } // end getText
 
+  void delete(long msgid, int part) throws DatabaseException
+  {
+    Connection conn = null;
+    PreparedStatement stmt = null;
+    Statement stmt2 = null;
+    try
+    { // get a connection
+      conn = getConnection();
+
+      // lock the tables
+      stmt2 = conn.createStatement();
+      stmt2.executeUpdate("LOCK TABLES us_text WRITE, us_text_props WRITE;");
+
+      // delete all entries from the main and property tables
+      stmt = conn.prepareStatement("DELETE FROM us_text WHERE msgid = ? AND part = ?;");
+      stmt.setLong(1,msgid);
+      stmt.setInt(2,part);
+      stmt.executeUpdate();
+      stmt.close();
+      stmt = conn.prepareStatement("DELETE FROM us_text_prop WHERE msgid = ? AND part = ?;");
+      stmt.setLong(1,msgid);
+      stmt.setInt(2,part);
+      stmt.executeUpdate();
+      stmt.close();
+
+      // renumber all entries above that one to close the gap
+      stmt = conn.prepareStatement("UPDATE us_text SET part = part - 1 WHERE msgid = ? AND part > ?;");
+      stmt.setLong(1,msgid);
+      stmt.setInt(2,part);
+      stmt.executeUpdate();
+      stmt.close();
+      stmt = conn.prepareStatement("UPDATE us_text_prop SET part = part - 1 WHERE msgid = ? AND part > ?;");
+      stmt.setLong(1,msgid);
+      stmt.setInt(2,part);
+      stmt.executeUpdate();
+
+    } // end try
+    catch (SQLException e)
+    { // translate to a general DatabaseException
+      throw generalException(e);
+
+    } // end catch
+    finally
+    { // shut everything down
+      MySQLUtils.unlockTables(conn);
+      SQLUtils.shutdown(stmt);
+      SQLUtils.shutdown(stmt2);
+      SQLUtils.shutdown(conn);
+
+    } // end finally
+
+  } // end delete
+
 } // end class TextPartOps_mysql

src/dynamo-framework/com/silverwrist/dynamo/unistore/UniStoreManager.java

@@ -24,6 +24,7 @@ import com.silverwrist.util.*;
 import com.silverwrist.util.xml.*;
 import com.silverwrist.dynamo.db.NamespaceCache;
 import com.silverwrist.dynamo.db.UserManagement;
+import com.silverwrist.dynamo.event.*;
 import com.silverwrist.dynamo.except.*;
 import com.silverwrist.dynamo.iface.*;
 import com.silverwrist.dynamo.security.SecurityReferenceMonitor;
@@ -38,6 +39,9 @@ public class UniStoreManager implements NamedObject, ComponentInitialize, Compon
 
   private static Logger logger = Logger.getLogger(UniStoreManager.class);
 
+  private static final Long NO_PARENT = new Long(0);
+  private static final Integer NO_SEQ = new Integer(0);
+
   private static int DEFAULT_MSGCACHE_HARD = 100;
   private static int DEFAULT_MSGCACHE_SOFT = 1000;
 
@@ -190,9 +194,46 @@ public class UniStoreManager implements NamedObject, ComponentInitialize, Compon
       m_msgcache.put(key,rc);
 
     } // end if
+    else if (rc.getMessageID()!=msgid)
+    { // This only happens when the message has been deleted but its object still lingers in the cache.  Make
+      // sure the cache entry is removed and throw an error.
+      m_msgcache.remove(key);
+      DatabaseException de = new DatabaseException(UniStoreManager.class,"UniStoreMessages","no.message");
+      de.setParameter(0,String.valueOf(msgid));
+      throw de;
+
+    } // end else if.
 
     return rc;
 
   } // end getMessage
 
+  public UniStoreMessage createMessage(DynamoUser caller) throws DatabaseException
+  {
+    // Call down to the database to create the record.
+    java.util.Date tick = new java.util.Date();
+    long newid = m_ops.createMessage(caller.getUID(),tick);
+
+    // Fake up a parameter buffer and use it to create the MessageImpl object.
+    Long key = new Long(newid);
+    HashMap params = new HashMap();
+    params.put(ManagerOps.PARAM_MSGID,key);
+    params.put(ManagerOps.PARAM_PARENT,NO_PARENT);
+    params.put(ManagerOps.PARAM_SEQ,NO_SEQ);
+    params.put(ManagerOps.PARAM_CREATOR,new Integer(caller.getUID()));
+    params.put(ManagerOps.PARAM_POSTED,tick);
+    MessageImpl rc = new MessageImpl(m_ops.getMessageOps(),m_ns_cache,m_srm,m_users,m_post,params);
+    rc.zeroCounts();
+
+    synchronized (this)
+    { // add the new message object to the cache
+      m_msgcache.put(key,rc);
+
+    } // end synchronized block
+
+    m_post.postUpdate(new MessageCreatedEvent(rc));
+    return rc;
+
+  } // end createMessage
+
 } // end class UniStoreManager

src/dynamo-framework/com/silverwrist/dynamo/unistore/UniStoreMessages.properties

@@ -26,3 +26,9 @@ bad.loadText.part=Unable to find text part #{0} of message #{1} in the Universal
 bad.loadText.id=Unable to find text part with ID {0}::{1} in message #{2} in the Universal Message Store.
 bad.loadBinary.part=Unable to find binary part #{0} of message #{1} in the Universal Message Store.
 bad.loadBinary.id=Unable to find binary part with ID {0}::{1} in message #{2} in the Universal Message Store.
+no.createPart=You are not authorized to create a new part in message #{0} in the Universal Message Store.
+part.exists=A part with this identity already exists in message #{0}.
+no.deletePart=You are not authorized to delete a part from message #{0} in the Universal Message Store.
+part.deleted=This part has been deleted.
+no.deleteMessage=You are not authorized to delete message #{0} in the Universal Message Store.
+message.deleted=This message has been deleted.