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Diffstat (limited to 'src/main/java/org/elasticsearch/river/cluster/PublishRiverClusterStateAction.java')
-rw-r--r-- | src/main/java/org/elasticsearch/river/cluster/PublishRiverClusterStateAction.java | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/src/main/java/org/elasticsearch/river/cluster/PublishRiverClusterStateAction.java b/src/main/java/org/elasticsearch/river/cluster/PublishRiverClusterStateAction.java new file mode 100644 index 0000000..2931539 --- /dev/null +++ b/src/main/java/org/elasticsearch/river/cluster/PublishRiverClusterStateAction.java @@ -0,0 +1,132 @@ +/* + * Licensed to Elasticsearch under one or more contributor + * license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright + * ownership. Elasticsearch licenses this file to you under + * the Apache License, Version 2.0 (the "License"); you may + * not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +package org.elasticsearch.river.cluster; + +import org.elasticsearch.cluster.ClusterService; +import org.elasticsearch.cluster.node.DiscoveryNode; +import org.elasticsearch.cluster.node.DiscoveryNodes; +import org.elasticsearch.common.component.AbstractComponent; +import org.elasticsearch.common.io.stream.StreamInput; +import org.elasticsearch.common.io.stream.StreamOutput; +import org.elasticsearch.common.settings.Settings; +import org.elasticsearch.threadpool.ThreadPool; +import org.elasticsearch.transport.*; + +import java.io.IOException; + +/** + * + */ +public class PublishRiverClusterStateAction extends AbstractComponent { + + public static interface NewClusterStateListener { + void onNewClusterState(RiverClusterState clusterState); + } + + private final TransportService transportService; + + private final ClusterService clusterService; + + private final NewClusterStateListener listener; + + public PublishRiverClusterStateAction(Settings settings, TransportService transportService, ClusterService clusterService, + NewClusterStateListener listener) { + super(settings); + this.transportService = transportService; + this.clusterService = clusterService; + this.listener = listener; + transportService.registerHandler(PublishClusterStateRequestHandler.ACTION, new PublishClusterStateRequestHandler()); + } + + public void close() { + transportService.removeHandler(PublishClusterStateRequestHandler.ACTION); + } + + public void publish(RiverClusterState clusterState) { + final DiscoveryNodes discoNodes = clusterService.state().nodes(); + final DiscoveryNode localNode = discoNodes.localNode(); + for (final DiscoveryNode node : discoNodes) { + if (node.equals(localNode)) { + // no need to send to our self + continue; + } + + // we only want to send nodes that are either possible master nodes or river nodes + // master nodes because they will handle the state and the allocation of rivers + // and river nodes since they will end up creating indexes + + if (!node.masterNode() && !RiverNodeHelper.isRiverNode(node)) { + continue; + } + + transportService.sendRequest(node, PublishClusterStateRequestHandler.ACTION, new PublishClusterStateRequest(clusterState), new EmptyTransportResponseHandler(ThreadPool.Names.SAME) { + @Override + public void handleException(TransportException exp) { + logger.debug("failed to send cluster state to [{}], should be detected as failed soon...", exp, node); + } + }); + } + } + + private class PublishClusterStateRequest extends TransportRequest { + + private RiverClusterState clusterState; + + private PublishClusterStateRequest() { + } + + private PublishClusterStateRequest(RiverClusterState clusterState) { + this.clusterState = clusterState; + } + + @Override + public void readFrom(StreamInput in) throws IOException { + super.readFrom(in); + clusterState = RiverClusterState.Builder.readFrom(in); + } + + @Override + public void writeTo(StreamOutput out) throws IOException { + super.writeTo(out); + RiverClusterState.Builder.writeTo(clusterState, out); + } + } + + private class PublishClusterStateRequestHandler extends BaseTransportRequestHandler<PublishClusterStateRequest> { + + static final String ACTION = "river/state/publish"; + + @Override + public PublishClusterStateRequest newInstance() { + return new PublishClusterStateRequest(); + } + + @Override + public String executor() { + return ThreadPool.Names.SAME; + } + + @Override + public void messageReceived(PublishClusterStateRequest request, TransportChannel channel) throws Exception { + listener.onNewClusterState(request.clusterState); + channel.sendResponse(TransportResponse.Empty.INSTANCE); + } + } +} |