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

         // 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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      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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   public List<TransactionInfo> getTransactionsForSegments(Address destination, int requestTopologyId, Set<Integer> segments) throws InterruptedException {
      if (trace) {
         log.tracef("Received request for transactions from node %s for segments %s of cache %s with topology id %d", destination, segments, cacheName, requestTopologyId);
      }


      final CacheTopology cacheTopology = getCacheTopology(requestTopologyId, destination, true);
      final ConsistentHash readCh = cacheTopology.getReadConsistentHash();


      Set<Integer> ownedSegments = readCh.getSegmentsForOwner(rpcManager.getAddress());
      if (!ownedSegments.containsAll(segments)) {
         segments.removeAll(ownedSegments);
         throw new IllegalArgumentException("Segments " + segments + " are not owned by " + rpcManager.getAddress());

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      }
      return transactions;
   }


   private CacheTopology getCacheTopology(int requestTopologyId, Address destination, boolean isReqForTransactions) throws InterruptedException {
      CacheTopology cacheTopology = stateConsumer.getCacheTopology();
      if (cacheTopology == null) {
         // no commands are processed until the join is complete, so this cannot normally happen
         throw new IllegalStateException("No cache topology received yet");
      }


      if (requestTopologyId < cacheTopology.getTopologyId()) {
         if (isReqForTransactions)
            log.transactionsRequestedByNodeWithOlderTopology(destination, requestTopologyId, cacheTopology.getTopologyId());
         else
            log.segmentsRequestedByNodeWithOlderTopology(destination, requestTopologyId, cacheTopology.getTopologyId());
      } else if (requestTopologyId > cacheTopology.getTopologyId()) {
         if (trace) {
            log.tracef("%s were requested by node %s with topology %d, greater than the local " +
                  "topology (%d). Waiting for topology %d to be installed locally.", isReqForTransactions ? "Transactions" : "Segments", destination,
                  requestTopologyId, cacheTopology.getTopologyId(), requestTopologyId);
         }
         stateTransferLock.waitForTopology(requestTopologyId);
         cacheTopology = stateConsumer.getCacheTopology();
      }
      return cacheTopology;

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      for (Cache c : caches) {
         StateTransferManager stateTransferManager = extractComponent(c, StateTransferManager.class);
         DefaultRebalancePolicy rebalancePolicy = (DefaultRebalancePolicy) TestingUtil.extractGlobalComponent(c.getCacheManager(), RebalancePolicy.class);
         Address cacheAddress = c.getAdvancedCache().getRpcManager().getAddress();
         while (true) {
            CacheTopology cacheTopology = stateTransferManager.getCacheTopology();
            boolean rebalanceInProgress = stateTransferManager.isStateTransferInProgress();
            boolean chIsBalanced = !rebalanceInProgress && rebalancePolicy.isBalanced(cacheTopology.getCurrentCH());
            boolean chContainsAllMembers = cacheTopology.getCurrentCH().getMembers().size() == caches.length;
            if (chIsBalanced && chContainsAllMembers)
               break;


            if (System.currentTimeMillis() > giveup) {
               String message;
               if (!chContainsAllMembers) {
                  Address[] addresses = new Address[caches.length];
                  for (int i = 0; i < caches.length; i++) {
                     addresses[i] = caches[i].getCacheManager().getAddress();
                  }
                  message = String.format("Timed out waiting for rebalancing to complete on node %s, " +
                        "expected member list is %s, current member list is %s!",
                        cacheAddress, Arrays.toString(addresses), cacheTopology.getCurrentCH().getMembers());
               } else {
                  message = String.format("Timed out waiting for rebalancing to complete on node %s, " +
                        "current topology is %s", c.getCacheManager().getAddress(), cacheTopology);
               }
               log.error(message);

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


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

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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 StaleTransactionCleanupService
      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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      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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      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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