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NodeIndicesStateUpdatedAction.java
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NodeIndicesStateUpdatedAction.java
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/*
* Licensed to ElasticSearch and Shay Banon 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.cluster.action.index;
import org.elasticsearch.ElasticSearchException;
import org.elasticsearch.cluster.ClusterService;
import org.elasticsearch.cluster.node.DiscoveryNodes;
import org.elasticsearch.common.component.AbstractComponent;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.*;
import java.io.IOException;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
public class NodeIndicesStateUpdatedAction extends AbstractComponent {
private final ThreadPool threadPool;
private final TransportService transportService;
private final ClusterService clusterService;
private final List<Listener> listeners = new CopyOnWriteArrayList<Listener>();
@Inject
public NodeIndicesStateUpdatedAction(Settings settings, ThreadPool threadPool, TransportService transportService, ClusterService clusterService) {
super(settings);
this.threadPool = threadPool;
this.transportService = transportService;
this.clusterService = clusterService;
transportService.registerHandler(NodeIndexStateUpdatedTransportHandler.ACTION, new NodeIndexStateUpdatedTransportHandler());
}
public void add(final Listener listener, TimeValue timeout) {
listeners.add(listener);
threadPool.schedule(timeout, ThreadPool.Names.GENERIC, new Runnable() {
@Override
public void run() {
boolean removed = listeners.remove(listener);
if (removed) {
listener.onTimeout();
}
}
});
}
public void remove(Listener listener) {
listeners.remove(listener);
}
public void nodeIndexStateUpdated(final NodeIndexStateUpdatedResponse response) throws ElasticSearchException {
DiscoveryNodes nodes = clusterService.state().nodes();
if (nodes.localNodeMaster()) {
threadPool.generic().execute(new Runnable() {
@Override
public void run() {
innerNodeIndexStateUpdated(response);
}
});
} else {
transportService.sendRequest(clusterService.state().nodes().masterNode(),
NodeIndexStateUpdatedTransportHandler.ACTION, response, EmptyTransportResponseHandler.INSTANCE_SAME);
}
}
private void innerNodeIndexStateUpdated(NodeIndexStateUpdatedResponse response) {
for (Listener listener : listeners) {
listener.onIndexStateUpdated(response);
}
}
private class NodeIndexStateUpdatedTransportHandler extends BaseTransportRequestHandler<NodeIndexStateUpdatedResponse> {
static final String ACTION = "cluster/nodeIndexStateUpdated";
@Override
public NodeIndexStateUpdatedResponse newInstance() {
return new NodeIndexStateUpdatedResponse();
}
@Override
public void messageReceived(NodeIndexStateUpdatedResponse response, TransportChannel channel) throws Exception {
innerNodeIndexStateUpdated(response);
channel.sendResponse(TransportResponse.Empty.INSTANCE);
}
@Override
public String executor() {
return ThreadPool.Names.SAME;
}
}
public static interface Listener {
void onIndexStateUpdated(NodeIndexStateUpdatedResponse response);
void onTimeout();
}
public static class NodeIndexStateUpdatedResponse extends TransportRequest {
private String nodeId;
private long version;
NodeIndexStateUpdatedResponse() {
}
public NodeIndexStateUpdatedResponse(String nodeId, long version) {
this.nodeId = nodeId;
this.version = version;
}
public String nodeId() {
return nodeId;
}
public long version() {
return version;
}
@Override
public void writeTo(StreamOutput out) throws IOException {
super.writeTo(out);
out.writeString(nodeId);
out.writeLong(version);
}
@Override
public void readFrom(StreamInput in) throws IOException {
super.readFrom(in);
nodeId = in.readString();
version = in.readLong();
}
}
}