Examples with ClusterStateObserver org.opensearch.cluster.ClusterStateObserver used on opensource projects

Example 1 with ClusterStateObserver

use of org.opensearch.cluster.ClusterStateObserver in project OpenSearch by opensearch-project.

the class TransportClearVotingConfigExclusionsAction method masterOperation.

@Override
protected void masterOperation(ClearVotingConfigExclusionsRequest request, ClusterState initialState, ActionListener<ClearVotingConfigExclusionsResponse> listener) throws Exception {
    final long startTimeMillis = threadPool.relativeTimeInMillis();
    final Predicate<ClusterState> allExclusionsRemoved = newState -> {
        for (VotingConfigExclusion tombstone : initialState.getVotingConfigExclusions()) {
            // NB checking for the existence of any node with this persistent ID, because persistent IDs are how votes are counted.
            if (newState.nodes().nodeExists(tombstone.getNodeId())) {
                return false;
            }
        }
        return true;
    };
    if (request.getWaitForRemoval() && allExclusionsRemoved.test(initialState) == false) {
        final ClusterStateObserver clusterStateObserver = new ClusterStateObserver(initialState, clusterService, request.getTimeout(), logger, threadPool.getThreadContext());
        clusterStateObserver.waitForNextChange(new Listener() {

            @Override
            public void onNewClusterState(ClusterState state) {
                submitClearVotingConfigExclusionsTask(request, startTimeMillis, listener);
            }

            @Override
            public void onClusterServiceClose() {
                listener.onFailure(new OpenSearchException("cluster service closed while waiting for removal of nodes " + initialState.getVotingConfigExclusions()));
            }

            @Override
            public void onTimeout(TimeValue timeout) {
                listener.onFailure(new OpenSearchTimeoutException("timed out waiting for removal of nodes; if nodes should not be removed, set waitForRemoval to false. " + initialState.getVotingConfigExclusions()));
            }
        }, allExclusionsRemoved);
    } else {
        submitClearVotingConfigExclusionsTask(request, startTimeMillis, listener);
    }
}

Example 2 with ClusterStateObserver

use of org.opensearch.cluster.ClusterStateObserver in project OpenSearch by opensearch-project.

the class TransportClusterHealthAction method executeHealth.

private void executeHealth(final ClusterHealthRequest request, final ClusterState currentState, final ActionListener<ClusterHealthResponse> listener, final int waitCount, final Consumer<ClusterState> onNewClusterStateAfterDelay) {
    if (request.timeout().millis() == 0) {
        listener.onResponse(getResponse(request, currentState, waitCount, TimeoutState.ZERO_TIMEOUT));
        return;
    }
    final Predicate<ClusterState> validationPredicate = newState -> validateRequest(request, newState, waitCount);
    if (validationPredicate.test(currentState)) {
        listener.onResponse(getResponse(request, currentState, waitCount, TimeoutState.OK));
    } else {
        final ClusterStateObserver observer = new ClusterStateObserver(currentState, clusterService, null, logger, threadPool.getThreadContext());
        final ClusterStateObserver.Listener stateListener = new ClusterStateObserver.Listener() {

            @Override
            public void onNewClusterState(ClusterState newState) {
                onNewClusterStateAfterDelay.accept(newState);
            }

            @Override
            public void onClusterServiceClose() {
                listener.onFailure(new NodeClosedException(clusterService.localNode()));
            }

            @Override
            public void onTimeout(TimeValue timeout) {
                listener.onResponse(getResponse(request, observer.setAndGetObservedState(), waitCount, TimeoutState.TIMED_OUT));
            }
        };
        observer.waitForNextChange(stateListener, validationPredicate, request.timeout());
    }
}

Example 3 with ClusterStateObserver

use of org.opensearch.cluster.ClusterStateObserver in project OpenSearch by opensearch-project.

the class ShardStateAction method sendShardAction.

private void sendShardAction(final String actionName, final ClusterState currentState, final TransportRequest request, final ActionListener<Void> listener) {
    ClusterStateObserver observer = new ClusterStateObserver(currentState, clusterService, null, logger, threadPool.getThreadContext());
    DiscoveryNode masterNode = currentState.nodes().getMasterNode();
    Predicate<ClusterState> changePredicate = MasterNodeChangePredicate.build(currentState);
    if (masterNode == null) {
        logger.warn("no master known for action [{}] for shard entry [{}]", actionName, request);
        waitForNewMasterAndRetry(actionName, observer, request, listener, changePredicate);
    } else {
        logger.debug("sending [{}] to [{}] for shard entry [{}]", actionName, masterNode.getId(), request);
        transportService.sendRequest(masterNode, actionName, request, new EmptyTransportResponseHandler(ThreadPool.Names.SAME) {

            @Override
            public void handleResponse(TransportResponse.Empty response) {
                listener.onResponse(null);
            }

            @Override
            public void handleException(TransportException exp) {
                if (isMasterChannelException(exp)) {
                    waitForNewMasterAndRetry(actionName, observer, request, listener, changePredicate);
                } else {
                    logger.warn(new ParameterizedMessage("unexpected failure while sending request [{}]" + " to [{}] for shard entry [{}]", actionName, masterNode, request), exp);
                    listener.onFailure(exp instanceof RemoteTransportException ? (Exception) (exp.getCause() instanceof Exception ? exp.getCause() : new OpenSearchException(exp.getCause())) : exp);
                }
            }
        });
    }
}

Example 4 with ClusterStateObserver

use of org.opensearch.cluster.ClusterStateObserver in project OpenSearch by opensearch-project.

the class NodeAndClusterIdStateListener method getAndSetNodeIdAndClusterId.

/**
 * Subscribes for the first cluster state update where nodeId and clusterId is present
 * and sets these values in {@link NodeAndClusterIdConverter}.
 */
public static void getAndSetNodeIdAndClusterId(ClusterService clusterService, ThreadContext threadContext) {
    ClusterState clusterState = clusterService.state();
    ClusterStateObserver observer = new ClusterStateObserver(clusterState, clusterService, null, logger, threadContext);
    observer.waitForNextChange(new NodeAndClusterIdStateListener(), NodeAndClusterIdStateListener::isNodeAndClusterIdPresent);
}

Example 5 with ClusterStateObserver

use of org.opensearch.cluster.ClusterStateObserver in project OpenSearch by opensearch-project.

the class PersistentTasksService method waitForPersistentTaskCondition.

/**
 * Waits for a given persistent task to comply with a given predicate, then call back the listener accordingly.
 *
 * @param taskId the persistent task id
 * @param predicate the persistent task predicate to evaluate
 * @param timeout a timeout for waiting
 * @param listener the callback listener
 */
public void waitForPersistentTaskCondition(final String taskId, final Predicate<PersistentTask<?>> predicate, @Nullable final TimeValue timeout, final WaitForPersistentTaskListener<?> listener) {
    final Predicate<ClusterState> clusterStatePredicate = clusterState -> predicate.test(PersistentTasksCustomMetadata.getTaskWithId(clusterState, taskId));
    final ClusterStateObserver observer = new ClusterStateObserver(clusterService, timeout, logger, threadPool.getThreadContext());
    final ClusterState clusterState = observer.setAndGetObservedState();
    if (clusterStatePredicate.test(clusterState)) {
        listener.onResponse(PersistentTasksCustomMetadata.getTaskWithId(clusterState, taskId));
    } else {
        observer.waitForNextChange(new ClusterStateObserver.Listener() {

            @Override
            public void onNewClusterState(ClusterState state) {
                listener.onResponse(PersistentTasksCustomMetadata.getTaskWithId(state, taskId));
            }

            @Override
            public void onClusterServiceClose() {
                listener.onFailure(new NodeClosedException(clusterService.localNode()));
            }

            @Override
            public void onTimeout(TimeValue timeout) {
                listener.onTimeout(timeout);
            }
        }, clusterStatePredicate);
    }
}