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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.optimistic;
import org.junit.Assert;
import org.junit.Test;
import org.openecomp.appc.lockmanager.api.LockException;
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 java.util.concurrent.*;
public class TestMySqlLockManager extends MySqlLockManagerBaseTests {
@Override
protected JdbcLockManager createJdbcLockManager(boolean useReal) {
return new MySqlLockManagerMock(useReal);
}
@Test
public void testConcurrentLockDifferentOwners() throws LockException, InterruptedException, ExecutionException, TimeoutException {
final int participantsNo = 2;
Synchronizer synchronizer = new Synchronizer(participantsNo) {
private boolean wait = true;
@Override
public void preAddLockRecord(String resource, String owner) {
if(Owner.A.name().equals(owner)) {
synchronized(this) {
if(wait) {
waitOn(this);
}
}
}
}
@Override
public void postAddLockRecord(String resource, String owner) {
if(!Owner.A.name().equals(owner)) {
synchronized(this) {
notifyAll();
wait = false;
}
}
}
@Override
public void preUpdateLockRecord(String resource, String owner) {
preAddLockRecord(resource, owner);
}
@Override
public void postUpdateLockRecord(String resource, String owner) {
postAddLockRecord(resource, owner);
}
};
if(!setSynchronizer(synchronizer)) {
return;
}
ExecutorService executor = Executors.newFixedThreadPool(participantsNo);
// acquireLock by owner A should fail as it will wait for acquireLock by owner B
Future<Boolean> future1 = executor.submit(new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
try {
lockManager.acquireLock(Resource.Resource1.name(), Owner.A.name());
return false;
} catch(LockException e) {
// this call should fail as Synchronizer delays its lock to make sure the second call locks the resource first
Assert.assertEquals("Cannot lock resource [" + Resource.Resource1.name() + "] for [" + Owner.A.name() + "]: already locked by [" + Owner.B.name() + "]", e.getMessage());
return true;
}
}
});
try {
// acquireLock by owner B should success
Future<Boolean> future2 = executor.submit(new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
// this call should success as Synchronizer delays the above lock to make sure this call success to lock the resource
return lockManager.acquireLock(Resource.Resource1.name(), Owner.B.name());
}
});
try {
Assert.assertTrue(future2.get(CONCURRENT_TEST_WAIT_TIME, TimeUnit.SECONDS));
Assert.assertTrue(future1.get(CONCURRENT_TEST_WAIT_TIME, TimeUnit.SECONDS));
} finally {
future2.cancel(true);
}
} finally {
future1.cancel(true);
}
}
@Test
public void testConcurrentLockSameOwner() throws LockException, InterruptedException, ExecutionException, TimeoutException {
final int participantsNo = 2;
Synchronizer synchronizer = new Synchronizer(participantsNo) {
private boolean wait = true;
@Override
public void preAddLockRecord(String resource, String owner) {
synchronized(this) {
if(wait) {
wait = false;
waitOn(this);
}
}
}
@Override
public void postAddLockRecord(String resource, String owner) {
synchronized(this) {
notifyAll();
}
}
};
if(!setSynchronizer(synchronizer)) {
return;
}
ExecutorService executor = Executors.newFixedThreadPool(participantsNo);
// one acquireLock should return true and the other should return false
Callable<Boolean> callable = new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
return lockManager.acquireLock(Resource.Resource1.name(), Owner.A.name());
}
};
Future<Boolean> future1 = executor.submit(callable);
try {
Future<Boolean> future2 = executor.submit(callable);
try {
boolean future1Res = future1.get(CONCURRENT_TEST_WAIT_TIME, TimeUnit.SECONDS);
boolean future2Res = future2.get(CONCURRENT_TEST_WAIT_TIME, TimeUnit.SECONDS);
// one of the lock requests should return true, the other one false as lock is requested simultaneously from 2 threads by same owner
Assert.assertNotEquals(future1Res, future2Res);
} finally {
future2.cancel(true);
}
} finally {
future1.cancel(true);
}
}
@Test
public void testConcurrentUnlockSameOwner() throws LockException, InterruptedException, ExecutionException, TimeoutException {
lockManager.acquireLock(Resource.Resource1.name(), Owner.A.name());
final int participantsNo = 2;
Synchronizer synchronizer = new Synchronizer(participantsNo) {
private boolean wait = true;
@Override
public void preUpdateLockRecord(String resource, String owner) {
synchronized(this) {
// make sure second call updates the LockRecord first
if(wait) {
wait = false;
waitOn(this);
}
}
}
@Override
public void postUpdateLockRecord(String resource, String owner) {
synchronized(this) {
notifyAll();
}
}
};
if(!setSynchronizer(synchronizer)) {
return;
}
ExecutorService executor = Executors.newFixedThreadPool(participantsNo);
Callable<Boolean> callable = new Callable<Boolean>() {
@Override
public Boolean call() throws Exception {
try {
lockManager.releaseLock(Resource.Resource1.name(), Owner.A.name());
// one of the unlock calls should success
return true;
} catch(LockException e) {
// one of the unlock calls should throw the LockException as the resource should already be unlocked by other call
Assert.assertEquals("Error unlocking resource [" + Resource.Resource1.name() + "]: resource is not locked", e.getMessage());
return false;
}
}
};
Future<Boolean> future1 = executor.submit(callable);
try {
Future<Boolean> future2 = executor.submit(callable);
try {
boolean future1Res = future1.get(CONCURRENT_TEST_WAIT_TIME, TimeUnit.SECONDS);
boolean future2Res = future2.get(CONCURRENT_TEST_WAIT_TIME, TimeUnit.SECONDS);
// one of the unlock calls should return true, the other one false as unlock is requested simultaneously from 2 threads by same owner
Assert.assertNotEquals(future1Res, future2Res);
} finally {
future2.cancel(true);
}
} finally {
future1.cancel(true);
}
}
}
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