Examples of org.xmlBlaster.engine.MsgUnitWrapper

org.xmlBlaster.engine.MsgUnitWrapper
Wraps a publish() message into an entry for a persistence cache.
There are two options to make this object persistent (measure on a 2GHz Intel Linux laptop with Postgres):

1. QoS and Key are stored as XML ASCII strings, the content as byte[]
This variant takes about 50 microsec to serialize (toXml()) and 380 microsec to create the object again (SAX parse). The size for an empty content is approx. 80 bytes for a medium sized key and QoS.

2. The whole object is java.io.Serialized
This variant takes about 160 microsec to serialize and 750 microsec to deserialize.

So we have chosen the XML variant as it is faster, has no versioning problems and has smaller size
@author xmlBlaster@marcelruff.info @see org.xmlBlaster.engine.queuemsg.ServerEntryFactory#main(String[])

   /**
    * @return true if no MsgUnitWrapper is found (the 'meat' is not available anymore)<br />
    *         or for msgUnitWrapper in state=DESTROYED
    */
   public boolean isDestroyed() {
      MsgUnitWrapper msgUnitWrapper = getMsgUnitWrapper();
      if (msgUnitWrapper == null)
         return true;
      return msgUnitWrapper.isDestroyed();
   }

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    * Gets the message unit but is for read only (dirty read) 
    * @return null if expired->destroyed
    * @throws XmlBlasterException
    */
   public MsgUnit getMsgUnitOrNull() {
      MsgUnitWrapper msgUnitWrapper = getMsgUnitWrapper();
      if (msgUnitWrapper == null) {
         return null;
      }
      return msgUnitWrapper.getMsgUnit();
   }

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    * Gets the message unit but is for read only (dirty read) 
    * @return
    * @throws XmlBlasterException if not found (e.g. forceDestroy and expired)
    */
   public MsgUnit getMsgUnit() throws XmlBlasterException {
      MsgUnitWrapper msgUnitWrapper = getMsgUnitWrapper();
      if (msgUnitWrapper == null) {
         throw new XmlBlasterException(glob, ErrorCode.INTERNAL_UNKNOWN, ME, "Message " + getUniqueId() + " not found");
      }
      return msgUnitWrapper.getMsgUnit();
   }

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      try {
         SessionName receiver = new SessionName(glob, "receiver1");
         PublishQosServer publishQosServer = new PublishQosServer(glob, "<qos/>");
         MsgUnit msgUnit = new MsgUnit(glob, "<key oid='XX'/>", new byte[0], publishQosServer.toXml());
         org.xmlBlaster.engine.ServerScope global = new org.xmlBlaster.engine.ServerScope();
         MsgUnitWrapper msgWrapper = new MsgUnitWrapper(glob, msgUnit, storageId);


         int step = 1000;
         int numCreate = 1000000;
         MsgQueueUpdateEntry entryArr[] = new MsgQueueUpdateEntry[numCreate];
         for(int i=0; i<numCreate; i++) {
            entryArr[i] = new MsgQueueUpdateEntry(global, msgWrapper, storageId,
                                             receiver, "__subId", false);
            MsgUnitWrapper w = entryArr[i].getMsgUnitWrapper();
            if ((i % step) == 0) {
               log.info("Overall created #" + i + ": Created " + step + " new MsgQueueUpdateEntry instances, hit a key to create more ...");
               try { System.in.read(); } catch(java.io.IOException e) {}
            }
            if (log.isLoggable(Level.FINE)) log.fine("Dump meat: " + w.toXml());
         }
         //log.info("entry=" + entryArr[0].toXml());
         //log.info("sizeInBytes=" + entryArr[0].getSizeInBytes() + " msgUnit.size()=" + msgUnit.size());
         //log.info("Created " + numCreate + " MsgQueueUpdateEntry instances, hit a key to create more ...");
         //try { System.in.read(); } catch(java.io.IOException e) {}

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      StorageId storageId = new StorageId(glob, Constants.RELATING_HISTORY, "historyEntry");
      try {
         PublishQosServer publishQosServer = new PublishQosServer(glob, "<qos/>");
         MsgUnit msgUnit = new MsgUnit(glob, "<key oid='XX'/>", new byte[0], publishQosServer.toXml());
         org.xmlBlaster.engine.ServerScope global = new org.xmlBlaster.engine.ServerScope();
         MsgUnitWrapper msgWrapper = new MsgUnitWrapper(glob, msgUnit, storageId);


         int step = 1000;
         int numCreate = 1000000;
         MsgQueueHistoryEntry entryArr[] = new MsgQueueHistoryEntry[numCreate];
         for(int i=0; i<numCreate; i++) {
            entryArr[i] = new MsgQueueHistoryEntry(global, msgWrapper, storageId);
            MsgUnitWrapper w = entryArr[i].getMsgUnitWrapper();
            if ((i % step) == 0) {
               log.info("Overall created #" + i + ": Created " + step + " new MsgQueueHistoryEntry instances, hit a key to create more ...");
               try { System.in.read(); } catch(java.io.IOException e) {}
            }
            if (log.isLoggable(Level.FINE)) log.fine("Dump meat: " + w.toXml());
         }
      }
      catch (XmlBlasterException ex) {          
         ex.printStackTrace();
         log.severe("exception occured : " + ex.getMessage());

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         PublishQosServer publishQosServer = new PublishQosServer(glob, "<qos/>");
         StorageId storageId = new StorageId(glob, Constants.RELATING_MSGUNITSTORE, "msgUnitWrapperEntry");


         int step = 1000;
         int numCreate = 1000000;
         MsgUnitWrapper entryArr[] = new MsgUnitWrapper[numCreate];
         log.info("Hit a key for new MsgUnitWrapper RAM size test ...");
         try { System.in.read(); } catch(java.io.IOException e) {}
         for(int i=0; i<numCreate; i++) {
            MsgUnit msgUnit = new MsgUnit(glob, "<key oid='XX'/>", new byte[0], publishQosServer.toXml());
            entryArr[i] = new MsgUnitWrapper(glob, msgUnit, storageId);
            if (i > 0 && (i % step) == 0) {
               log.info("Overall created #" + i + ": Created " + step + " new MsgUnitWrapper instances, msgUnitSize=" + msgUnit.size() + ", hit a key to create more ...");
               try { System.in.read(); } catch(java.io.IOException e) {}
            }
         }

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      {
         for (int i=0; i<msgArr_.length; i++) {
            MsgQueueUpdateEntry entry = (MsgQueueUpdateEntry)msgArr_[i];


            MsgUnitWrapper msgUnitWrapper = entry.getMsgUnitWrapper();
            if (msgUnitWrapper == null) {
               if (log.isLoggable(Level.FINE)) log.fine(ME+": doSend("+entry.getLogId()+") ignoring callback message as no meat is available (assume expired)");
               entry.setReturnObj(new UpdateReturnQosServer(this.glob, Constants.RET_EXPIRED)); //"<qos><state id='EXPIRED'/></qos>";
               continue;
            }
            if (msgUnitWrapper.getMsgQosData().isPtp() && session!=null && !session.getConnectQos().isPtpAllowed()) {
               if (log.isLoggable(Level.FINE)) log.fine(ME+": doSend("+entry.getLogId()+") ignoring callback message as PtP is not wanted");
               entry.setReturnObj(new UpdateReturnQosServer(this.glob, Constants.RET_ERASED));
               continue;
            }


            MsgUnit mu = msgUnitWrapper.getMsgUnit();
            //MsgUnit mu = entry.getMsgUnit(); throws unwanted exception if meat==null (forceDestroy)
            MsgQosData msgQosData = (MsgQosData)mu.getQosData().clone();
            msgQosData.setTopicProperty(null);
            msgQosData.setState(entry.getState());
            msgQosData.setSubscriptionId(entry.getSubscriptionId());

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      ArrayList entriesWithNoDistributor = new ArrayList();
      for (int i=0; i < entries.size(); i++) {
         Object obj = entries.get(i); 
         if (!(obj instanceof MsgQueueUpdateEntry)) return entries; // Can be removed, was to distinguish client side code which is not necessary anymore (as we are the server side implementation)
         MsgQueueUpdateEntry entry = (MsgQueueUpdateEntry)obj;
         MsgUnitWrapper wrapper = entry.getMsgUnitWrapper();
         boolean hasMsgDistributor = wrapper.getServerScope().getTopicAccessor().hasMsgDistributorPluginDirtyRead(wrapper.getKeyOid());
         
         if (hasMsgDistributor) {
            if (ex != null) { // in this case it is possible that retObj is not set yet
               UpdateReturnQosServer retQos = (UpdateReturnQosServer)entry.getReturnObj();               
               try {

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org.xmlBlaster.contrib.dbupdate.OneToThree

org.xmlBlaster.engine.dispatch.CbDispatchConnection

org.xmlBlaster.engine.dispatch.CbDispatchConnectionsHandler

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org.xmlBlaster.engine.queuemsg.MsgQueueUpdateEntry

org.xmlBlaster.engine.queuemsg.ReferenceEntry

org.xmlBlaster.engine.queuemsg.ServerEntryFactory

org.xmlBlaster.test.classtest.msgstore.I_MapTest

org.xmlBlaster.test.classtest.msgstore.MsgUnitWrapperTest

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