Examples of org.infinispan.topology.CacheTopology$Externalizer

org.infinispan.topology.CacheTopology
The status of a cache from a distribution/state transfer point of view.
The pending CH can be {@code null} if we don't have a state transfer in progress.
The {@code topologyId} is incremented every time the topology changes (i.e. state transferstarts or ends). It is not modified when the consistent hashes are updated without requiring state transfer (e.g. when a member leaves). @author Dan Berindei @since 5.2

      if (trace) {
         log.tracef("Starting outbound transfer of segments %s to node %s with topology id %d for cache %s", segments,
               destination, requestTopologyId, cacheName);
      }


      final CacheTopology cacheTopology = getCacheTopology(requestTopologyId, destination, false);


      // the destination node must already have an InboundTransferTask waiting for these segments
      OutboundTransferTask outboundTransfer = new OutboundTransferTask(destination, segments, chunkSize, cacheTopology.getTopologyId(),
            cacheTopology.getReadConsistentHash(), this, dataContainer, cacheLoaderManager, rpcManager, commandsFactory, timeout, cacheName);
      addTransfer(outboundTransfer);
      outboundTransfer.execute(executorService);
   }

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         // performed and a null is assumed. But in invalidation mode the user must expect the data can disappear
         // from cache at any time so this null previous value should not cause any trouble.
         return false;
      }
      synchronized (this) {
         CacheTopology localCacheTopology = cacheTopology;
         if (localCacheTopology == null || localCacheTopology.getPendingCH() == null)
            return false;
         Address address = rpcManager.getAddress();
         boolean keyWillBeLocal = localCacheTopology.getPendingCH().isKeyLocalToNode(address, key);
         boolean keyIsLocal = localCacheTopology.getCurrentCH().isKeyLocalToNode(address, key);
         return keyWillBeLocal && !keyIsLocal;
      }
   }

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   private void updateTopologyIdAndWaitForTransactionData(TopologyAffectedCommand command) throws InterruptedException {
      // set the topology id if it was not set before (ie. this is local command)
      // TODO Make tx commands extend FlagAffectedCommand so we can use CACHE_MODE_LOCAL in TransactionTable.cleanupStaleTransactions
      if (command.getTopologyId() == -1) {
         CacheTopology cacheTopology = stateTransferManager.getCacheTopology();
         if (cacheTopology != null) {
            command.setTopologyId(cacheTopology.getTopologyId());
         }
      }


      // remote/forwarded command
      int cmdTopologyId = command.getTopologyId();

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            configuration.clustering().hash().numOwners(),
            configuration.clustering().stateTransfer().timeout(),
            configuration.transaction().transactionProtocol().isTotalOrder(),
            configuration.clustering().cacheMode().isDistributed());


      CacheTopology initialTopology = localTopologyManager.join(cacheName, joinInfo, new CacheTopologyHandler() {
         @Override
         public void updateConsistentHash(CacheTopology cacheTopology) {
            doTopologyUpdate(cacheTopology, false);
         }

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      currentCH = new GroupingConsistentHash(currentCH, groupManager);
      ConsistentHash pendingCH = cacheTopology.getPendingCH();
      if (pendingCH != null) {
         pendingCH = new GroupingConsistentHash(pendingCH, groupManager);
      }
      return new CacheTopology(cacheTopology.getTopologyId(), currentCH, pendingCH);
   }

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      }


      // handle grouping
      newCacheTopology = addGrouping(newCacheTopology);


      CacheTopology oldCacheTopology = stateConsumer.getCacheTopology();


      if (oldCacheTopology != null && oldCacheTopology.getTopologyId() > newCacheTopology.getTopologyId()) {
         throw new IllegalStateException("Old topology is higher: old=" + oldCacheTopology + ", new=" + newCacheTopology);
      }


      ConsistentHash oldCH = oldCacheTopology != null ? oldCacheTopology.getWriteConsistentHash() : null;
      ConsistentHash newCH = newCacheTopology.getWriteConsistentHash();


      // TODO Improve notification to contain both CHs
      cacheNotifier.notifyTopologyChanged(oldCH, newCH, newCacheTopology.getTopologyId(), true);

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   @Override
   public void forwardCommandIfNeeded(TopologyAffectedCommand command, Set<Object> affectedKeys, Address origin, boolean sync) {
      int cmdTopologyId = command.getTopologyId();
      // forward commands with older topology ids to their new targets
      // but we need to make sure we have the latest topology
      CacheTopology cacheTopology = getCacheTopology();
      int localTopologyId = cacheTopology != null ? cacheTopology.getTopologyId() : -1;
      // if it's a tx/lock/write command, forward it to the new owners
      log.tracef("CommandTopologyId=%s, localTopologyId=%s", cmdTopologyId, localTopologyId);


      if (cmdTopologyId < localTopologyId) {
         ConsistentHash writeCh = cacheTopology.getWriteConsistentHash();
         Set<Address> newTargets = new HashSet<Address>(writeCh.locateAllOwners(affectedKeys));
         newTargets.remove(rpcManager.getAddress());
         // Forwarding to the originator would create a cycle
         // TODO This may not be the "real" originator, but one of the original recipients
         // or even one of the nodes that one of the original recipients forwarded the command to.

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   }


   @Override
   public DataLocality getLocality(Object key) {
      boolean transferInProgress = stateTransferManager.isStateTransferInProgressForKey(key);
      CacheTopology topology = stateTransferManager.getCacheTopology();


      // Null topology means state transfer has not occurred,
      // hence data should be stored locally.
      boolean local = topology == null
            || topology.getWriteConsistentHash().isKeyLocalToNode(getAddress(), key);


      if (transferInProgress) {
         if (local) {
            return DataLocality.LOCAL_UNCERTAIN;
         } else {

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      }
      return remotePrepare(ctx, command);
   }


   private Object remotePrepare(TxInvocationContext ctx, PrepareCommand command) throws Throwable {
      CacheTopology cacheTopology = stateTransferManager.getCacheTopology();
      final int topologyId = cacheTopology.getTopologyId();
      ((RemoteTransaction) ctx.getCacheTransaction()).setMissingLookedUpEntries(false);


      if (log.isTraceEnabled()) {
         log.tracef("Remote transaction received %s. Tx topology id is %s and current topology is is %s",
                    ctx.getGlobalTransaction().globalId(), command.getTopologyId(), topologyId);

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   private Object localPrepare(TxInvocationContext ctx, PrepareCommand command) throws Throwable {
      boolean needsToPrepare = true;
      Object retVal = null;
      while (needsToPrepare) {
         try {
            CacheTopology cacheTopology = stateTransferManager.getCacheTopology();


            command.setTopologyId(cacheTopology.getTopologyId());


            if (log.isTraceEnabled()) {
               log.tracef("Local transaction received %s. setting topology Id to %s",
                          command.getGlobalTransaction().globalId(), command.getTopologyId());
            }

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