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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.discovery;
import org.elasticsearch.Version;
import org.elasticsearch.cluster.node.DiscoveryNode;
import org.elasticsearch.common.logging.ESLogger;
import org.elasticsearch.common.transport.DummyTransportAddress;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.common.util.concurrent.AbstractRunnable;
import org.elasticsearch.test.ESTestCase;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
import java.util.concurrent.CyclicBarrier;
import static org.hamcrest.Matchers.*;
public class BlockingClusterStatePublishResponseHandlerTests extends ESTestCase {
static private class PublishResponder extends AbstractRunnable {
final boolean fail;
final DiscoveryNode node;
final CyclicBarrier barrier;
final ESLogger logger;
final BlockingClusterStatePublishResponseHandler handler;
public PublishResponder(boolean fail, DiscoveryNode node, CyclicBarrier barrier, ESLogger logger, BlockingClusterStatePublishResponseHandler handler) {
this.fail = fail;
this.node = node;
this.barrier = barrier;
this.logger = logger;
this.handler = handler;
}
@Override
public void onFailure(Throwable t) {
logger.error("unexpected error", t);
}
@Override
protected void doRun() throws Exception {
barrier.await();
if (fail) {
handler.onFailure(node, new Exception("bla"));
} else {
handler.onResponse(node);
}
}
}
public void testConcurrentAccess() throws InterruptedException {
int nodeCount = scaledRandomIntBetween(10, 20);
DiscoveryNode[] allNodes = new DiscoveryNode[nodeCount];
for (int i = 0; i < nodeCount; i++) {
DiscoveryNode node = new DiscoveryNode("node_" + i, DummyTransportAddress.INSTANCE, Version.CURRENT);
allNodes[i] = node;
}
BlockingClusterStatePublishResponseHandler handler = new BlockingClusterStatePublishResponseHandler(new HashSet<>(Arrays.asList(allNodes)));
int firstRound = randomIntBetween(5, nodeCount - 1);
Thread[] threads = new Thread[firstRound];
CyclicBarrier barrier = new CyclicBarrier(firstRound);
Set<DiscoveryNode> completedNodes = new HashSet<>();
for (int i = 0; i < threads.length; i++) {
completedNodes.add(allNodes[i]);
threads[i] = new Thread(new PublishResponder(randomBoolean(), allNodes[i], barrier, logger, handler));
threads[i].start();
}
// wait on the threads to finish
for (Thread t : threads) {
t.join();
}
// verify that the publisher times out
assertFalse("expected handler wait to timeout as not all nodes responded", handler.awaitAllNodes(new TimeValue(10)));
Set<DiscoveryNode> pendingNodes = new HashSet<>(Arrays.asList(handler.pendingNodes()));
assertThat(completedNodes, not(contains(pendingNodes.toArray(new DiscoveryNode[0]))));
assertThat(completedNodes.size() + pendingNodes.size(), equalTo(allNodes.length));
int secondRound = allNodes.length - firstRound;
threads = new Thread[secondRound];
barrier = new CyclicBarrier(secondRound);
for (int i = 0; i < threads.length; i++) {
threads[i] = new Thread(new PublishResponder(randomBoolean(), allNodes[firstRound + i], barrier, logger, handler));
threads[i].start();
}
// wait on the threads to finish
for (Thread t : threads) {
t.join();
}
assertTrue("expected handler not to timeout as all nodes responded", handler.awaitAllNodes(new TimeValue(10)));
assertThat(handler.pendingNodes(), arrayWithSize(0));
}
}
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