Examples of org.jboss.cache.optimistic.DataVersion

org.jboss.cache.optimistic.DataVersion
When versioning data nodes in optimistic locking, a DataVersion is assigned to each node. Versions need to implement the {@link #newerThan} method sothey can be compared during the validation phase upon commit.
It is recommended that implementations implement {@link java.io.Externalizable} and make useof a good marshalling/unmarshalling mechanism for the sake of efficiency, as these objects are frequently serialized to be replicated across the wire. @author Manik Surtani (manik AT jboss DOT org) @deprecated this is to support a deprecated locking scheme (Optimistic Locking). Will be removed when Optimistic Locking support is removed.

    *
    * @throws Exception
    */
   public void testCompatibleVersionTypes1() throws Exception
   {
      DataVersion version = new TestVersion("99");
      cache[0].getInvocationContext().getOptionOverrides().setDataVersion(version);
      cache[0].put(fqn, key, "value");// TestVersion-99 should be on both caches now


      TransactionManager mgr = cache[0].getTransactionManager();
      mgr.begin();

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    *
    * @throws Exception
    */
   public void testCompatibleVersionTypesOutDatedVersion1() throws Exception
   {
      DataVersion version = new TestVersion("99");
      cache[0].getInvocationContext().getOptionOverrides().setDataVersion(version);
      cache[0].put(fqn, key, "value");// TestVersion-99 should be on both caches now


      TransactionManager mgr = cache[0].getTransactionManager();
      mgr.begin();

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      TransactionManager mgr = cache[0].getTransactionManager();
      mgr.begin();


      // explicitly set data version
      DataVersion version = new TestVersion("99");
      cache[1].getInvocationContext().getOptionOverrides().setDataVersion(version);


      try
      {
         cache[1].put(fqn, key, "value2");

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      cache[0].put(fqn, key, "value");// TestVersion-99 should be on both caches now


      TransactionManager mgr = cache[0].getTransactionManager();
      mgr.begin();


      DataVersion version = new DefaultDataVersion(300);
      cache[1].getInvocationContext().getOptionOverrides().setDataVersion(version);
      cache[1].put(fqn, key, "value2");
      mgr.commit();
   }

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    *
    * @throws Exception
    */
   public void testCompatibleVersionTypesOutDatedVersion2() throws Exception
   {
      DataVersion version = new DefaultDataVersion(200);
      cache[0].getInvocationContext().getOptionOverrides().setDataVersion(version);
      cache[0].put(fqn, key, "value");// TestVersion-99 should be on both caches now


      TransactionManager mgr = cache[0].getTransactionManager();
      mgr.begin();

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  public void writeUpdate(Object key, Object value, Object currentVersion, Object previousVersion) {
    try {
            ensureRegionRootExists();
            
      Option option = new Option();
      DataVersion dv = ( source != null && source.isVersioned() )
                       ? new DataVersionAdapter( currentVersion, previousVersion, source.getVersionComparator(), source.toString() )
                       : NonLockingDataVersion.INSTANCE;
      option.setDataVersion( dv );
      if (localOnlyQueries && key instanceof QueryKey)
               option.setCacheModeLocal(true);

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  @SuppressWarnings("unchecked")
    public void writeLoad(Object key, Object value, Object currentVersion) {
     Transaction tx = null;
     try {
        Option option = new Option();
        DataVersion dv = ( source != null && source.isVersioned() )
                             ? new DataVersionAdapter( currentVersion, currentVersion, source.getVersionComparator(), source.toString() )
                             : NonLockingDataVersion.INSTANCE;
        option.setDataVersion( dv );


        if (forTimestamps)

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      Node toReturn = findInternal(fqn, false);


      if (toReturn != null && version != null)
      {
         // we need to check the version of the data node...
         DataVersion nodeVersion = ((OptimisticTreeNode) toReturn).getVersion();
         if (log.isDebugEnabled())
            log.debug("looking for optimistic node [" + fqn + "] with version [" + version + "].  My version is [" + nodeVersion + "]");
         if (nodeVersion.newerThan(version))
         {
            // we have a versioning problem; throw an exception!
            throw new CacheException("Unable to validate versions.");
         }

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         {
            // use explicit versioning
            if (ctx.getOptionOverrides() != null && ctx.getOptionOverrides().getDataVersion() != null)
            {
               workspace.setVersioningImplicit(false);
               DataVersion version = ctx.getOptionOverrides().getDataVersion();


               workspaceNode.setVersion(version);
               if (log.isTraceEnabled()) log.trace("Setting versioning for node " + workspaceNode.getFqn() + " to explicit");
               workspaceNode.setVersioningImplicit(false);
            }

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   }


   public void writeUpdate(Object key, Object value, Object currentVersion, Object previousVersion) {
      try {
         Option option = new Option();
         DataVersion dv = ( source != null && source.isVersioned() )
         ? new DataVersionAdapter( currentVersion, previousVersion, source.getVersionComparator(), source.toString() )
         : NonLockingDataVersion.INSTANCE;
         option.setDataVersion( dv );
         option.setCacheModeLocal(queryCacheLocalWritesOnly);
         cache.put( new Fqn( regionFqn, key ), ITEM, value, option );

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