/* 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.RuntimeServiceImpl;
import org.camunda.bpm.engine.impl.interceptor.CommandExecutor;
import org.camunda.bpm.engine.impl.interceptor.CommandInterceptor;
import org.camunda.bpm.engine.impl.interceptor.RetryInterceptor;
import org.camunda.bpm.engine.impl.pvm.delegate.ActivityBehavior;
import org.camunda.bpm.engine.impl.pvm.delegate.ActivityExecution;
import org.camunda.bpm.engine.impl.test.PluggableProcessEngineTestCase;
import org.camunda.bpm.engine.runtime.ProcessInstance;
import org.camunda.bpm.engine.test.Deployment;
/**
* @author Tom Baeyens
*/
public class CompetingSignalsTest extends PluggableProcessEngineTestCase {
private static Logger log = Logger.getLogger(CompetingSignalsTest.class.getName());
Thread testThread = Thread.currentThread();
static ControllableThread activeThread;
public class SignalThread extends ControllableThread {
String executionId;
OptimisticLockingException exception;
public SignalThread(String executionId) {
this.executionId = executionId;
}
@Override
public synchronized void startAndWaitUntilControlIsReturned() {
activeThread = this;
super.startAndWaitUntilControlIsReturned();
}
public void run() {
try {
runtimeService.signal(executionId);
} catch (OptimisticLockingException e) {
this.exception = e;
}
log.fine(getName()+" ends");
}
}
public static class ControlledConcurrencyBehavior implements ActivityBehavior {
public void execute(ActivityExecution execution) throws Exception {
activeThread.returnControlToTestThreadAndWait();
}
}
@Deployment
public void testCompetingSignals() throws Exception {
ProcessInstance processInstance = runtimeService.startProcessInstanceByKey("CompetingSignalsProcess");
String processInstanceId = processInstance.getId();
log.fine("test thread starts thread one");
SignalThread threadOne = new SignalThread(processInstanceId);
threadOne.startAndWaitUntilControlIsReturned();
log.fine("test thread continues to start thread two");
SignalThread threadTwo = new SignalThread(processInstanceId);
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());
}
@Deployment(resources={"org/camunda/bpm/engine/test/concurrency/CompetingSignalsTest.testCompetingSignals.bpmn20.xml"})
public void testCompetingSignalsWithRetry() throws Exception {
RuntimeServiceImpl runtimeServiceImpl = (RuntimeServiceImpl)runtimeService;
CommandExecutor before = runtimeServiceImpl.getCommandExecutor();
try {
CommandInterceptor retryInterceptor = new RetryInterceptor();
retryInterceptor.setNext(before);
runtimeServiceImpl.setCommandExecutor(retryInterceptor);
ProcessInstance processInstance = runtimeService.startProcessInstanceByKey("CompetingSignalsProcess");
String processInstanceId = processInstance.getId();
log.fine("test thread starts thread one");
SignalThread threadOne = new SignalThread(processInstanceId);
threadOne.startAndWaitUntilControlIsReturned();
log.fine("test thread continues to start thread two");
SignalThread threadTwo = new SignalThread(processInstanceId);
threadTwo.startAndWaitUntilControlIsReturned();
log.fine("test thread notifies thread 1");
threadOne.proceedAndWaitTillDone();
assertNull(threadOne.exception);
log.fine("test thread notifies thread 2");
threadTwo.proceedAndWaitTillDone();
assertNull(threadTwo.exception);
} finally {
// reset the command executor
runtimeServiceImpl.setCommandExecutor(before);
}
}
}