Examples of org.infinispan.topology.CacheTopology

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

      }


      // 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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      return stateConsumer.getCacheTopology();
   }


   @Override
   public boolean isLocalNodeFirst() {
      CacheTopology cacheTopology = stateConsumer.getCacheTopology();
      if (cacheTopology == null || cacheTopology.getMembers().isEmpty()) {
         throw new IllegalStateException("Can only check if the local node is the first to join after joining");
      }


      return cacheTopology.getMembers().get(0).equals(rpcManager.getAddress());
   }

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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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      return t != null ? t.getAddress() : null;
   }


   @Override
   public int getTopologyId() {
      CacheTopology cacheTopology = stateTransferManager.getCacheTopology();
      return cacheTopology != null ? cacheTopology.getTopologyId() : -1;
   }

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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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      }


      @Override
      public EntryVersionsMap createNewVersionsAndCheckForWriteSkews(VersionGenerator versionGenerator, TxInvocationContext context, VersionedPrepareCommand prepareCommand) {
         // In REPL mode, this happens if we are the coordinator.
         CacheTopology cacheTopology = stateTransferManager.getCacheTopology();
         if (prepareCommand.getModifications().length == 0) {
            // For situations when there's a local-only put in the prepare,
            // simply add an empty entry version map. This works because when
            // a local-only put is executed, this is not added to the prepare
            // modification list.
            context.getCacheTransaction().setUpdatedEntryVersions(new EntryVersionsMap());
         } else {
            ConsistentHash readConsistentHash = cacheTopology.getReadConsistentHash();
            List<Address> members = readConsistentHash.getMembers();
            if (members.get(0).equals(rpcManager.getAddress())) {
               // Perform a write skew check on each entry.
               EntryVersionsMap uv = performWriteSkewCheckAndReturnNewVersions(
                     prepareCommand, dataContainer, versionGenerator, context,

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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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            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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org.infinispan.cdi.test.event.CacheEventTest

org.infinispan.distribution.ch.ConsistentHash

org.infinispan.distribution.DistributionManagerImpl

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org.infinispan.distribution.rehash.NonTxJoinerBecomingBackupOwnerTest

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org.infinispan.interceptors.distribution.BaseDistributionInterceptor

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