/* 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.camunda.bpm.engine.test.concurrency;
import java.util.logging.Logger;
import org.camunda.bpm.engine.OptimisticLockingException;
import org.camunda.bpm.engine.impl.cmd.SignalCmd;
import org.camunda.bpm.engine.impl.test.PluggableProcessEngineTestCase;
import org.camunda.bpm.engine.runtime.Execution;
import org.camunda.bpm.engine.runtime.ProcessInstance;
import org.camunda.bpm.engine.test.Deployment;
/**
* @author Tom Baeyens
*/
public class CompetingJoinTest extends PluggableProcessEngineTestCase {
private static Logger log = Logger.getLogger(CompetingSignalsTest.class.getName());
Thread testThread = Thread.currentThread();
static ControllableThread activeThread;
static String jobId;
public class SignalThread extends ControllableThread {
String executionId;
OptimisticLockingException exception;
public SignalThread(String executionId) {
this.executionId = executionId;
}
public synchronized void startAndWaitUntilControlIsReturned() {
activeThread = this;
super.startAndWaitUntilControlIsReturned();
}
public void run() {
try {
processEngineConfiguration
.getCommandExecutorTxRequired()
.execute(new ControlledCommand(activeThread, new SignalCmd(executionId, null, null,null)));
} catch (OptimisticLockingException e) {
this.exception = e;
}
log.fine(getName()+" ends");
}
}
@Deployment
public void testCompetingJoins() throws Exception {
ProcessInstance processInstance = runtimeService.startProcessInstanceByKey("CompetingJoinsProcess");
Execution execution1 = runtimeService
.createExecutionQuery()
.processInstanceId(processInstance.getId())
.activityId("wait1")
.singleResult();
Execution execution2 = runtimeService
.createExecutionQuery()
.processInstanceId(processInstance.getId())
.activityId("wait2")
.singleResult();
log.fine("test thread starts thread one");
SignalThread threadOne = new SignalThread(execution1.getId());
threadOne.startAndWaitUntilControlIsReturned();
log.fine("test thread continues to start thread two");
SignalThread threadTwo = new SignalThread(execution2.getId());
threadTwo.startAndWaitUntilControlIsReturned();
log.fine("test thread notifies thread 1");
threadOne.proceedAndWaitTillDone();
assertNull(threadOne.exception);
log.fine("test thread notifies thread 2");
threadTwo.proceedAndWaitTillDone();
assertNotNull(threadTwo.exception);
assertTextPresent("was updated by another transaction concurrently", threadTwo.exception.getMessage());
}
}