/*
* Copyright 2014 the original author or authors.
*
* Licensed 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.springframework.xd.distributed.test;
import static org.junit.Assert.assertFalse;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import org.junit.Test;
import org.springframework.xd.dirt.core.DeploymentUnitStatus;
import org.springframework.xd.rest.client.impl.SpringXDTemplate;
/**
* Set of tests to verify that deployed streams are reporting the correct
* state after starting/shutting down containers.
*
* @author Patrick Peralta
*/
public class StreamStateTests extends AbstractDistributedTests {
/**
* For a stream with a sink that requires two containers,
* assert the following state transitions:
* <ul>
* <li>Initial state: deployed</li>
* <li>Shut down one container (not the one hosting
* the source): incomplete</li>
* <li>Shut down the remaining container: failed</li>
* <li>Start one container: incomplete</li>
* <li>Start another container: deployed</li>
* </ul>
*
* @throws Exception
*/
@Test
public void testIncompleteState() throws Exception {
for (int i = 0; i < 2; i++) {
startContainer();
}
SpringXDTemplate template = ensureTemplate();
logger.info("Waiting for containers...");
Map<Long, String> mapPidUuid = waitForContainers();
logger.info("Containers running");
String streamName = testName.getMethodName() + "-ticktock";
template.streamOperations().createStream(streamName, "time|log", false);
verifyStreamCreated(streamName);
template.streamOperations().deploy(streamName, "module.log.count=2");
verifyStreamDeployed(streamName);
ModuleRuntimeContainers moduleContainers = retrieveModuleRuntimeContainers(streamName);
Set<String> sinks = new HashSet<String>(moduleContainers.getSinkContainers());
sinks.removeAll(moduleContainers.getSourceContainers());
long pidToKill = 0;
for (Map.Entry<Long, String> entry : mapPidUuid.entrySet()) {
if (sinks.contains(entry.getValue())) {
pidToKill = entry.getKey();
break;
}
}
assertFalse(pidToKill == 0);
logger.info("Killing container with pid {}", pidToKill);
shutdownContainer(pidToKill);
verifyStreamState(streamName, DeploymentUnitStatus.State.incomplete);
shutdownContainers();
verifyStreamState(streamName, DeploymentUnitStatus.State.failed);
startContainer();
verifyStreamState(streamName, DeploymentUnitStatus.State.incomplete);
startContainer();
verifyStreamDeployed(streamName);
}
}