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/*-
* ============LICENSE_START=======================================================
* openECOMP : APP-C
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights
* reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.openecomp.appc.lockmanager.impl.sql.pessimistic;
import org.junit.Assert;
import org.junit.Test;
import org.openecomp.appc.lockmanager.api.LockException;
import org.openecomp.appc.lockmanager.api.LockRuntimeException;
import org.openecomp.appc.lockmanager.impl.sql.JdbcLockManager;
import org.openecomp.appc.lockmanager.impl.sql.MySqlLockManagerBaseTests;
import org.openecomp.appc.lockmanager.impl.sql.Synchronizer;
import org.openecomp.appc.lockmanager.impl.sql.pessimistic.MySqlLockManager;
import java.util.concurrent.*;
public class TestMySqlLockManager extends MySqlLockManagerBaseTests {
private static int CRITICAL_SECTION_WAIT_TIMEOUT = 1; // in secs
@Override
protected JdbcLockManager createJdbcLockManager(boolean useReal) {
return new MySqlLockManagerMock(useReal);
}
@Test
public void testConcurrentLock() throws LockException, InterruptedException, ExecutionException, TimeoutException {
try {
callConcurrentTest(new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
try {
Assert.assertTrue(lockManager.acquireLock(Resource.Resource1.name(), Owner.A.name()));
return true;
} catch(LockRuntimeException e) {
Assert.assertEquals("Cannot obtain critical section lock for resource [" + Resource.Resource1.name() + "].", e.getMessage());
return false;
}
}
});
} finally {
lockManager.releaseLock(Resource.Resource1.name(), Owner.A.name());
}
}
@Test
public void testConcurrentUnlock() throws LockException, InterruptedException, ExecutionException, TimeoutException {
lockManager.acquireLock(Resource.Resource1.name(), Owner.A.name());
callConcurrentTest(new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
try {
lockManager.releaseLock(Resource.Resource1.name(), Owner.A.name());
return true;
} catch(LockRuntimeException e) {
Assert.assertEquals("Cannot obtain critical section lock for resource [" + Resource.Resource1.name() + "].", e.getMessage());
return false;
}
}
});
}
private void callConcurrentTest(Callable<Boolean> callable) throws LockException, InterruptedException, ExecutionException, TimeoutException {
final int participantsNo = 2;
Synchronizer synchronizer = new Synchronizer(participantsNo) {
@Override
protected void waitForAllParticipants(Object waitObj, int totalParticipantsNo, int currentParticipantsNo) {
waitOn(this, TimeUnit.MILLISECONDS.convert(1 + CRITICAL_SECTION_WAIT_TIMEOUT, TimeUnit.SECONDS)); // add 1 sec to make sure timeout occured
}
};
if(!setSynchronizer(synchronizer)) {
return;
}
((MySqlLockManager)lockManager).setCriticalSectionWaitTimeoutSecs(CRITICAL_SECTION_WAIT_TIMEOUT);
ExecutorService executor = Executors.newFixedThreadPool(participantsNo);
Future<Boolean> future1 = executor.submit(callable);
try {
for(int i = 0; i < 10; i++) {
Thread.sleep(100);
if(synchronizer.getParticipantCount() > 0) {
break;
}
}
// make sure 1st thread gets inside critical section
if(synchronizer.getParticipantCount() < 1) {
Assert.fail(getClass().getName() + " first thread failed to acquireLock()");
}
Future<Boolean> future2 = executor.submit(callable);
try {
// 1st thread should acquire the lock
Assert.assertTrue(future1.get(3 + CRITICAL_SECTION_WAIT_TIMEOUT, TimeUnit.SECONDS));
// 2nd thread should fail waiting for critical section
Assert.assertFalse(future2.get(2 + CRITICAL_SECTION_WAIT_TIMEOUT, TimeUnit.SECONDS));
} finally {
future2.cancel(true);
}
} finally {
future1.cancel(true);
setSynchronizer(null);
}
}
}
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