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/*
* 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.indices.flush;
import org.elasticsearch.ExceptionsHelper;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.routing.ShardRouting;
import org.elasticsearch.index.engine.Engine;
import org.elasticsearch.index.shard.ShardId;
import org.elasticsearch.test.InternalTestCluster;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CountDownLatch;
/** Utils for SyncedFlush */
public class SyncedFlushUtil {
private SyncedFlushUtil() {
}
/**
* Blocking version of {@link SyncedFlushService#attemptSyncedFlush(ShardId, ActionListener)}
*/
public static ShardsSyncedFlushResult attemptSyncedFlush(InternalTestCluster cluster, ShardId shardId) {
SyncedFlushService service = cluster.getInstance(SyncedFlushService.class);
LatchedListener<ShardsSyncedFlushResult> listener = new LatchedListener();
service.attemptSyncedFlush(shardId, listener);
try {
listener.latch.await();
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
if (listener.error != null) {
throw ExceptionsHelper.convertToElastic(listener.error);
}
return listener.result;
}
public static final class LatchedListener<T> implements ActionListener<T> {
public volatile T result;
public volatile Throwable error;
public final CountDownLatch latch = new CountDownLatch(1);
@Override
public void onResponse(T result) {
this.result = result;
latch.countDown();
}
@Override
public void onFailure(Throwable e) {
error = e;
latch.countDown();
}
}
/**
* Blocking version of {@link SyncedFlushService#sendPreSyncRequests(List, ClusterState, ShardId, ActionListener)}
*/
public static Map<String, Engine.CommitId> sendPreSyncRequests(SyncedFlushService service, List<ShardRouting> activeShards, ClusterState state, ShardId shardId) {
LatchedListener<Map<String, Engine.CommitId>> listener = new LatchedListener<>();
service.sendPreSyncRequests(activeShards, state, shardId, listener);
try {
listener.latch.await();
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
if (listener.error != null) {
throw ExceptionsHelper.convertToElastic(listener.error);
}
return listener.result;
}
}
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