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 testIncompatibleVersionTypes1() 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 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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//            }
            
            regionRoot = jbcCache.getRoot().getChild( regionFqn );
            if (regionRoot == null || !regionRoot.isValid()) {
               // Establish the region root node with a non-locking data version
               DataVersion version = optimistic ? NonLockingDataVersion.INSTANCE : null;
               regionRoot = CacheHelper.addNode(jbcCache, regionFqn, true, true, version);
            }
            else if (optimistic && regionRoot instanceof NodeSPI) {
                // FIXME Hacky workaround to JBCACHE-1202
                if ( !( ( ( NodeSPI ) regionRoot ).getVersion() instanceof NonLockingDataVersion ) ) {

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                 // Make sure the root node for the region exists and 
                 // has a DataVersion that never complains
                 newRoot = jbcCache.getRoot().getChild( regionFqn );
                 if (newRoot == null || !newRoot.isValid()) {                
                     // Establish the region root node with a non-locking data version
                     DataVersion version = optimistic ? NonLockingDataVersion.INSTANCE : null;
                     newRoot = CacheHelper.addNode(jbcCache, regionFqn, true, true, version);    
                 }
                 else if (newRoot instanceof NodeSPI) {
                     // FIXME Hacky workaround to JBCACHE-1202
                     if ( !( ( ( NodeSPI ) newRoot ).getVersion() instanceof NonLockingDataVersion ) ) {

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    {
       synchronized (currentView) {
          Transaction tx = suspend();
          try {
             for (Object member : currentView) {
                DataVersion version = optimistic ? NonLockingDataVersion.INSTANCE : null;
                Fqn f = Fqn.fromRelativeElements(internalFqn, member);
                CacheHelper.addNode(jbcCache, f, true, false, version);
             }
          }
          finally {

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        return true;
    }


    private Option getDataVersionOption(Object currentVersion, Object previousVersion) {
        
        DataVersion dv = (dataDescription != null && dataDescription.isVersioned()) ? new DataVersionAdapter(
                currentVersion, previousVersion, dataDescription.getVersionComparator(), dataDescription.toString())
                : NonLockingDataVersion.INSTANCE;
        Option opt = new Option();
        opt.setDataVersion(dv);
        return opt;

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