Examples with TopologyChangedEvent org.infinispan.notifications.cachelistener.event.TopologyChangedEvent used on opensource projects

Example 1 with TopologyChangedEvent

use of org.infinispan.notifications.cachelistener.event.TopologyChangedEvent in project wildfly by wildfly.

the class CacheRegistry method topologyChanged.

@TopologyChanged
public void topologyChanged(TopologyChangedEvent<Node, Map.Entry<K, V>> event) {
    if (event.isPre())
        return;
    ConsistentHash previousHash = event.getConsistentHashAtStart();
    List<Address> previousMembers = previousHash.getMembers();
    ConsistentHash hash = event.getConsistentHashAtEnd();
    List<Address> members = hash.getMembers();
    Address localAddress = event.getCache().getCacheManager().getAddress();
    // Determine which nodes have left the cache view
    Set<Address> addresses = new HashSet<>(previousMembers);
    addresses.removeAll(members);
    try {
        this.topologyChangeExecutor.submit(() -> {
            if (!addresses.isEmpty()) {
                // We're only interested in the entries for which we are the primary owner
                List<Node> nodes = addresses.stream().filter(address -> hash.locatePrimaryOwner(address).equals(localAddress)).map(address -> this.factory.createNode(address)).collect(Collectors.toList());
                if (!nodes.isEmpty()) {
                    Cache<Node, Map.Entry<K, V>> cache = this.cache.getAdvancedCache().withFlags(Flag.FORCE_SYNCHRONOUS);
                    Map<K, V> removed = new HashMap<>();
                    try (Batch batch = this.batcher.createBatch()) {
                        for (Node node : nodes) {
                            Map.Entry<K, V> old = cache.remove(node);
                            if (old != null) {
                                removed.put(old.getKey(), old.getValue());
                            }
                        }
                    } catch (CacheException e) {
                        ClusteringServerLogger.ROOT_LOGGER.registryPurgeFailed(e, this.cache.getCacheManager().toString(), this.cache.getName(), nodes);
                    }
                    // Invoke listeners outside above tx context
                    if (!removed.isEmpty()) {
                        this.notifyListeners(Event.Type.CACHE_ENTRY_REMOVED, removed);
                    }
                }
            } else {
                // This is a merge after cluster split: re-populate the cache registry with lost registry entries
                if (!previousMembers.contains(localAddress)) {
                    // If this node is not a member at merge start, its mapping is lost and needs to be recreated and listeners notified
                    try {
                        this.populateRegistry();
                        // Local cache events do not trigger notifications
                        this.notifyListeners(Event.Type.CACHE_ENTRY_CREATED, this.entry);
                    } catch (CacheException e) {
                        ClusteringServerLogger.ROOT_LOGGER.failedToRestoreLocalRegistryEntry(e, this.cache.getCacheManager().toString(), this.cache.getName());
                    }
                }
            }
        });
    } catch (RejectedExecutionException e) {
    // Executor was shutdown
    }
}