| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.distributedlog.lock; |
| |
| import org.apache.distributedlog.DLMTestUtil; |
| import org.apache.distributedlog.exceptions.LockingException; |
| import org.apache.distributedlog.ZooKeeperClient; |
| import org.apache.distributedlog.ZooKeeperClientBuilder; |
| import org.apache.distributedlog.ZooKeeperClientUtils; |
| import org.apache.distributedlog.ZooKeeperClusterTestCase; |
| import org.apache.distributedlog.exceptions.OwnershipAcquireFailedException; |
| import org.apache.distributedlog.lock.ZKSessionLock.State; |
| import org.apache.distributedlog.util.FailpointUtils; |
| import org.apache.distributedlog.util.OrderedScheduler; |
| import com.twitter.util.Await; |
| import com.twitter.util.Promise; |
| import org.apache.bookkeeper.stats.NullStatsLogger; |
| import org.apache.bookkeeper.util.SafeRunnable; |
| import org.apache.commons.lang3.tuple.Pair; |
| import org.apache.zookeeper.CreateMode; |
| import org.apache.zookeeper.KeeperException; |
| import org.apache.zookeeper.ZooDefs; |
| import org.apache.zookeeper.ZooKeeper; |
| import org.junit.After; |
| import org.junit.Before; |
| import org.junit.Rule; |
| import org.junit.Test; |
| import org.junit.rules.TestName; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import scala.runtime.BoxedUnit; |
| |
| import java.io.IOException; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import java.util.concurrent.atomic.AtomicReference; |
| |
| import static org.apache.distributedlog.lock.ZKSessionLock.*; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertNotNull; |
| import static org.junit.Assert.assertTrue; |
| import static org.junit.Assert.fail; |
| |
| /** |
| * Distributed Lock Tests |
| */ |
| public class TestZKSessionLock extends ZooKeeperClusterTestCase { |
| |
| @Rule |
| public TestName testNames = new TestName(); |
| |
| static final Logger logger = LoggerFactory.getLogger(TestZKSessionLock.class); |
| |
| private final static int sessionTimeoutMs = 2000; |
| |
| private ZooKeeperClient zkc; |
| private ZooKeeperClient zkc0; // used for checking |
| private OrderedScheduler lockStateExecutor; |
| |
| @Before |
| public void setup() throws Exception { |
| zkc = ZooKeeperClientBuilder.newBuilder() |
| .name("zkc") |
| .uri(DLMTestUtil.createDLMURI(zkPort, "/")) |
| .sessionTimeoutMs(sessionTimeoutMs) |
| .zkServers(zkServers) |
| .zkAclId(null) |
| .build(); |
| zkc0 = ZooKeeperClientBuilder.newBuilder() |
| .name("zkc0") |
| .uri(DLMTestUtil.createDLMURI(zkPort, "/")) |
| .sessionTimeoutMs(sessionTimeoutMs) |
| .zkServers(zkServers) |
| .zkAclId(null) |
| .build(); |
| lockStateExecutor = OrderedScheduler.newBuilder() |
| .corePoolSize(1) |
| .build(); |
| } |
| |
| @After |
| public void teardown() throws Exception { |
| zkc.close(); |
| zkc0.close(); |
| lockStateExecutor.shutdown(); |
| } |
| |
| private static void createLockPath(ZooKeeper zk, String lockPath) throws Exception { |
| zk.create(lockPath, new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); |
| } |
| |
| private static String createLockNodeV1(ZooKeeper zk, String lockPath, String clientId) throws Exception { |
| return zk.create(getLockPathPrefixV1(lockPath), serializeClientId(clientId), |
| ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL_SEQUENTIAL); |
| } |
| |
| private static String createLockNodeV2(ZooKeeper zk, String lockPath, String clientId) throws Exception { |
| return zk.create(getLockPathPrefixV2(lockPath, clientId), serializeClientId(clientId), |
| ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL_SEQUENTIAL); |
| } |
| |
| private static String createLockNodeV3(ZooKeeper zk, String lockPath, String clientId) throws Exception { |
| return zk.create(getLockPathPrefixV3(lockPath, clientId, zk.getSessionId()), serializeClientId(clientId), |
| ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL_SEQUENTIAL); |
| } |
| |
| private static String createLockNodeWithBadNodeName(ZooKeeper zk, String lockPath, String clientId, String badNodeName) |
| throws Exception { |
| return zk.create(lockPath + "/" + badNodeName, serializeClientId(clientId), |
| ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL); |
| } |
| |
| private static List<String> getLockWaiters(ZooKeeperClient zkc, String lockPath) throws Exception { |
| List<String> children = zkc.get().getChildren(lockPath, false); |
| Collections.sort(children, ZKSessionLock.MEMBER_COMPARATOR); |
| return children; |
| } |
| |
| @Test(timeout = 60000) |
| public void testParseClientID() throws Exception { |
| ZooKeeper zk = zkc.get(); |
| |
| String lockPath = "/test-parse-clientid"; |
| String clientId = "test-parse-clientid-" + System.currentTimeMillis(); |
| Pair<String, Long> lockId = Pair.of(clientId, zk.getSessionId()); |
| |
| createLockPath(zk, lockPath); |
| |
| // Correct data |
| String node1 = getLockIdFromPath(createLockNodeV1(zk, lockPath, clientId)); |
| String node2 = getLockIdFromPath(createLockNodeV2(zk, lockPath, clientId)); |
| String node3 = getLockIdFromPath(createLockNodeV3(zk, lockPath, clientId)); |
| |
| assertEquals(lockId, Await.result(asyncParseClientID(zk, lockPath, node1))); |
| assertEquals(lockId, Await.result(asyncParseClientID(zk, lockPath, node2))); |
| assertEquals(lockId, Await.result(asyncParseClientID(zk, lockPath, node3))); |
| |
| // Bad Lock Node Name |
| String node4 = getLockIdFromPath(createLockNodeWithBadNodeName(zk, lockPath, clientId, "member")); |
| String node5 = getLockIdFromPath(createLockNodeWithBadNodeName(zk, lockPath, clientId, "member_badnode")); |
| String node6 = getLockIdFromPath(createLockNodeWithBadNodeName(zk, lockPath, clientId, "member_badnode_badnode")); |
| String node7 = getLockIdFromPath(createLockNodeWithBadNodeName(zk, lockPath, clientId, "member_badnode_badnode_badnode")); |
| String node8 = getLockIdFromPath(createLockNodeWithBadNodeName(zk, lockPath, clientId, "member_badnode_badnode_badnode_badnode")); |
| |
| assertEquals(lockId, Await.result(asyncParseClientID(zk, lockPath, node4))); |
| assertEquals(lockId, Await.result(asyncParseClientID(zk, lockPath, node5))); |
| assertEquals(lockId, Await.result(asyncParseClientID(zk, lockPath, node6))); |
| assertEquals(lockId, Await.result(asyncParseClientID(zk, lockPath, node7))); |
| assertEquals(lockId, Await.result(asyncParseClientID(zk, lockPath, node8))); |
| |
| // Malformed Node Name |
| String node9 = getLockIdFromPath(createLockNodeWithBadNodeName(zk, lockPath, clientId, "member_malformed_s12345678_999999")); |
| assertEquals(Pair.of("malformed", 12345678L), Await.result(asyncParseClientID(zk, lockPath, node9))); |
| } |
| |
| @Test(timeout = 60000) |
| public void testParseMemberID() throws Exception { |
| assertEquals(Integer.MAX_VALUE, parseMemberID("badnode")); |
| assertEquals(Integer.MAX_VALUE, parseMemberID("badnode_badnode")); |
| assertEquals(0, parseMemberID("member_000000")); |
| assertEquals(123, parseMemberID("member_000123")); |
| } |
| |
| @Test(timeout = 60000) |
| public void testAreLockWaitersInSameSession() throws Exception { |
| ZooKeeper zk = zkc.get(); |
| |
| String lockPath = "/test-are-lock-waiters-in-same-session"; |
| String clientId1 = "test-are-lock-waiters-in-same-session-1"; |
| String clientId2 = "test-are-lock-waiters-in-same-session-2"; |
| |
| createLockPath(zk, lockPath); |
| |
| String node1 = getLockIdFromPath(createLockNodeV3(zk, lockPath, clientId1)); |
| String node2 = getLockIdFromPath(createLockNodeV3(zk, lockPath, clientId2)); |
| String node3 = getLockIdFromPath(createLockNodeV3(zk, lockPath, clientId1)); |
| |
| assertEquals(node1 + " and " + node3 + " should be in same session.", |
| true, areLockWaitersInSameSession(node1, node3)); |
| assertEquals(node1 + " and " + node2 + " should be not in same session.", |
| false, areLockWaitersInSameSession(node1, node2)); |
| assertEquals(node3 + " and " + node2 + " should be not in same session.", |
| false, areLockWaitersInSameSession(node3, node2)); |
| } |
| |
| @Test(timeout = 60000) |
| public void testExecuteLockAction() throws Exception { |
| String lockPath = "/test-execute-lock-action"; |
| String clientId = "test-execute-lock-action-" + System.currentTimeMillis(); |
| |
| ZKSessionLock lock = |
| new ZKSessionLock(zkc, lockPath, clientId, lockStateExecutor); |
| |
| final AtomicInteger counter = new AtomicInteger(0); |
| |
| // lock action would be executed in same epoch |
| final CountDownLatch latch1 = new CountDownLatch(1); |
| lock.executeLockAction(lock.getEpoch().get(), new LockAction() { |
| @Override |
| public void execute() { |
| counter.incrementAndGet(); |
| latch1.countDown(); |
| } |
| |
| @Override |
| public String getActionName() { |
| return "increment1"; |
| } |
| }); |
| latch1.await(); |
| assertEquals("counter should be increased in same epoch", 1, counter.get()); |
| |
| // lock action would not be executed in same epoch |
| final CountDownLatch latch2 = new CountDownLatch(1); |
| lock.executeLockAction(lock.getEpoch().get() + 1, new LockAction() { |
| @Override |
| public void execute() { |
| counter.incrementAndGet(); |
| } |
| |
| @Override |
| public String getActionName() { |
| return "increment2"; |
| } |
| }); |
| lock.executeLockAction(lock.getEpoch().get(), new LockAction() { |
| @Override |
| public void execute() { |
| latch2.countDown(); |
| } |
| |
| @Override |
| public String getActionName() { |
| return "countdown"; |
| } |
| }); |
| latch2.await(); |
| assertEquals("counter should not be increased in different epochs", 1, counter.get()); |
| |
| // lock action would not be executed in same epoch and promise would be satisfied with exception |
| Promise<BoxedUnit> promise = new Promise<BoxedUnit>(); |
| lock.executeLockAction(lock.getEpoch().get() + 1, new LockAction() { |
| @Override |
| public void execute() { |
| counter.incrementAndGet(); |
| } |
| |
| @Override |
| public String getActionName() { |
| return "increment3"; |
| } |
| }, promise); |
| try { |
| Await.result(promise); |
| fail("Should satisfy promise with epoch changed exception."); |
| } catch (EpochChangedException ece) { |
| // expected |
| } |
| assertEquals("counter should not be increased in different epochs", 1, counter.get()); |
| |
| lockStateExecutor.shutdown(); |
| } |
| |
| /** |
| * Test lock after unlock is called. |
| * |
| * @throws Exception |
| */ |
| @Test(timeout = 60000) |
| public void testLockAfterUnlock() throws Exception { |
| String lockPath = "/test-lock-after-unlock"; |
| String clientId = "test-lock-after-unlock"; |
| |
| ZKSessionLock lock = new ZKSessionLock(zkc, lockPath, clientId, lockStateExecutor); |
| lock.unlock(); |
| assertEquals(State.CLOSED, lock.getLockState()); |
| |
| try { |
| lock.tryLock(0, TimeUnit.MILLISECONDS); |
| fail("Should fail on tryLock since lock state has changed."); |
| } catch (LockStateChangedException lsce) { |
| // expected |
| } |
| assertEquals(State.CLOSED, lock.getLockState()); |
| |
| try { |
| lock.tryLock(Long.MAX_VALUE, TimeUnit.MILLISECONDS); |
| fail("Should fail on tryLock immediately if lock state has changed."); |
| } catch (LockStateChangedException lsce) { |
| // expected |
| } |
| assertEquals(State.CLOSED, lock.getLockState()); |
| } |
| |
| class DelayFailpointAction extends FailpointUtils.AbstractFailPointAction { |
| long timeout; |
| DelayFailpointAction(long timeout) { |
| this.timeout = timeout; |
| } |
| @Override |
| public boolean checkFailPoint() throws IOException { |
| try { |
| Thread.sleep(timeout); |
| } catch (InterruptedException ie) { |
| } |
| return true; |
| } |
| } |
| |
| /** |
| * Test unlock timeout. |
| * |
| * @throws Exception |
| */ |
| @Test(timeout = 60000) |
| public void testUnlockTimeout() throws Exception { |
| String name = testNames.getMethodName(); |
| String lockPath = "/" + name; |
| String clientId = name; |
| |
| createLockPath(zkc.get(), lockPath); |
| |
| ZKSessionLock lock = new ZKSessionLock( |
| zkc, lockPath, clientId, lockStateExecutor, |
| 1*1000 /* op timeout */, NullStatsLogger.INSTANCE, |
| new DistributedLockContext()); |
| |
| lock.tryLock(0, TimeUnit.MILLISECONDS); |
| assertEquals(State.CLAIMED, lock.getLockState()); |
| |
| try { |
| FailpointUtils.setFailpoint(FailpointUtils.FailPointName.FP_LockUnlockCleanup, |
| new DelayFailpointAction(60*60*1000)); |
| |
| lock.unlock(); |
| assertEquals(State.CLOSING, lock.getLockState()); |
| } finally { |
| FailpointUtils.removeFailpoint(FailpointUtils.FailPointName.FP_LockUnlockCleanup); |
| } |
| } |
| |
| /** |
| * Test try-create after close race condition. |
| * |
| * @throws Exception |
| */ |
| @Test(timeout = 60000) |
| public void testTryCloseRaceCondition() throws Exception { |
| String name = testNames.getMethodName(); |
| String lockPath = "/" + name; |
| String clientId = name; |
| |
| createLockPath(zkc.get(), lockPath); |
| |
| ZKSessionLock lock = new ZKSessionLock( |
| zkc, lockPath, clientId, lockStateExecutor, |
| 1*1000 /* op timeout */, NullStatsLogger.INSTANCE, |
| new DistributedLockContext()); |
| |
| try { |
| FailpointUtils.setFailpoint(FailpointUtils.FailPointName.FP_LockTryCloseRaceCondition, |
| FailpointUtils.DEFAULT_ACTION); |
| |
| lock.tryLock(0, TimeUnit.MILLISECONDS); |
| } catch (LockClosedException ex) { |
| ; |
| } finally { |
| FailpointUtils.removeFailpoint(FailpointUtils.FailPointName.FP_LockTryCloseRaceCondition); |
| } |
| |
| assertEquals(State.CLOSED, lock.getLockState()); |
| List<String> children = getLockWaiters(zkc, lockPath); |
| assertEquals(0, children.size()); |
| } |
| |
| /** |
| * Test try acquire timeout. |
| * |
| * @throws Exception |
| */ |
| @Test(timeout = 60000) |
| public void testTryAcquireTimeout() throws Exception { |
| String name = testNames.getMethodName(); |
| String lockPath = "/" + name; |
| String clientId = name; |
| |
| createLockPath(zkc.get(), lockPath); |
| |
| ZKSessionLock lock = new ZKSessionLock( |
| zkc, lockPath, clientId, lockStateExecutor, |
| 1 /* op timeout */, NullStatsLogger.INSTANCE, |
| new DistributedLockContext()); |
| |
| try { |
| FailpointUtils.setFailpoint(FailpointUtils.FailPointName.FP_LockTryAcquire, |
| new DelayFailpointAction(60*60*1000)); |
| |
| lock.tryLock(0, TimeUnit.MILLISECONDS); |
| assertEquals(State.CLOSED, lock.getLockState()); |
| } catch (LockingException le) { |
| } catch (Exception e) { |
| fail("expected locking exception"); |
| } finally { |
| FailpointUtils.removeFailpoint(FailpointUtils.FailPointName.FP_LockTryAcquire); |
| } |
| } |
| |
| @Test(timeout = 60000) |
| public void testBasicLockUnlock0() throws Exception { |
| testBasicLockUnlock(0); |
| } |
| |
| @Test(timeout = 60000) |
| public void testBasicLockUnlock1() throws Exception { |
| testBasicLockUnlock(Long.MAX_VALUE); |
| } |
| |
| /** |
| * Test Basic Lock and Unlock |
| * |
| * - lock should succeed if there is no lock held |
| * - lock should fail on a success lock |
| * - unlock should release the held lock |
| * |
| * @param timeout |
| * timeout to wait for the lock |
| * @throws Exception |
| */ |
| private void testBasicLockUnlock(long timeout) throws Exception { |
| String lockPath = "/test-basic-lock-unlock-" + timeout + System.currentTimeMillis(); |
| String clientId = "test-basic-lock-unlock"; |
| |
| createLockPath(zkc.get(), lockPath); |
| |
| ZKSessionLock lock = new ZKSessionLock(zkc, lockPath, clientId, lockStateExecutor); |
| // lock |
| lock.tryLock(timeout, TimeUnit.MILLISECONDS); |
| // verification after lock |
| assertEquals(State.CLAIMED, lock.getLockState()); |
| List<String> children = getLockWaiters(zkc, lockPath); |
| assertEquals(1, children.size()); |
| assertEquals(lock.getLockId(), Await.result(asyncParseClientID(zkc.get(), lockPath, children.get(0)))); |
| |
| // lock should fail on a success lock |
| try { |
| lock.tryLock(timeout, TimeUnit.MILLISECONDS); |
| fail("Should fail on locking a failure lock."); |
| } catch (LockStateChangedException lsce) { |
| // expected |
| } |
| assertEquals(State.CLAIMED, lock.getLockState()); |
| children = getLockWaiters(zkc, lockPath); |
| assertEquals(1, children.size()); |
| assertEquals(lock.getLockId(), Await.result(asyncParseClientID(zkc.get(), lockPath, children.get(0)))); |
| |
| // unlock |
| lock.unlock(); |
| // verification after unlock |
| assertEquals(State.CLOSED, lock.getLockState()); |
| assertEquals(0, getLockWaiters(zkc, lockPath).size()); |
| } |
| |
| /** |
| * Test lock on non existed lock. |
| * |
| * - lock should fail on a non existed lock. |
| * |
| * @throws Exception |
| */ |
| @Test(timeout = 60000) |
| public void testLockOnNonExistedLock() throws Exception { |
| String lockPath = "/test-lock-on-non-existed-lock"; |
| String clientId = "test-lock-on-non-existed-lock"; |
| |
| ZKSessionLock lock = new ZKSessionLock(zkc, lockPath, clientId, lockStateExecutor); |
| // lock |
| try { |
| lock.tryLock(0, TimeUnit.MILLISECONDS); |
| fail("Should fail on locking a non-existed lock."); |
| } catch (LockingException le) { |
| Throwable cause = le.getCause(); |
| assertTrue(cause instanceof KeeperException); |
| assertEquals(KeeperException.Code.NONODE, ((KeeperException) cause).code()); |
| } |
| assertEquals(State.CLOSED, lock.getLockState()); |
| |
| // lock should failed on a failure lock |
| try { |
| lock.tryLock(0, TimeUnit.MILLISECONDS); |
| fail("Should fail on locking a failure lock."); |
| } catch (LockStateChangedException lsce) { |
| // expected |
| } |
| assertEquals(State.CLOSED, lock.getLockState()); |
| } |
| |
| @Test(timeout = 60000) |
| public void testLockWhenSomeoneHeldLock0() throws Exception { |
| testLockWhenSomeoneHeldLock(0); |
| } |
| |
| @Test(timeout = 60000) |
| public void testLockWhenSomeoneHeldLock1() throws Exception { |
| testLockWhenSomeoneHeldLock(500); |
| } |
| |
| /** |
| * Test lock if the lock is already held by someone else. Any lock in this situation will |
| * fail with current owner. |
| * |
| * @param timeout |
| * timeout to wait for the lock |
| * @throws Exception |
| */ |
| private void testLockWhenSomeoneHeldLock(long timeout) throws Exception { |
| String lockPath = "/test-lock-nowait-" + timeout + "-" + System.currentTimeMillis(); |
| String clientId0 = "test-lock-nowait-0-" + System.currentTimeMillis(); |
| String clientId1 = "test-lock-nowait-1-" + System.currentTimeMillis(); |
| String clientId2 = "test-lock-nowait-2-" + System.currentTimeMillis(); |
| |
| createLockPath(zkc.get(), lockPath); |
| |
| ZKSessionLock lock0 = new ZKSessionLock(zkc0, lockPath, clientId0, lockStateExecutor); |
| ZKSessionLock lock1 = new ZKSessionLock(zkc, lockPath, clientId1, lockStateExecutor); |
| |
| lock0.tryLock(Long.MAX_VALUE, TimeUnit.MILLISECONDS); |
| // verification after lock0 lock |
| assertEquals(State.CLAIMED, lock0.getLockState()); |
| List<String> children = getLockWaiters(zkc0, lockPath); |
| assertEquals(1, children.size()); |
| assertEquals(lock0.getLockId(), Await.result(asyncParseClientID(zkc0.get(), lockPath, children.get(0)))); |
| |
| try { |
| lock1.tryLock(timeout, TimeUnit.MILLISECONDS); |
| fail("lock1 should fail on locking since lock0 is holding the lock."); |
| } catch (OwnershipAcquireFailedException oafe) { |
| assertEquals(lock0.getLockId().getLeft(), oafe.getCurrentOwner()); |
| } |
| // verification after lock1 tryLock |
| assertEquals(State.CLAIMED, lock0.getLockState()); |
| assertEquals(State.CLOSED, lock1.getLockState()); |
| children = getLockWaiters(zkc0, lockPath); |
| assertEquals(1, children.size()); |
| assertEquals(lock0.getLockId(), Await.result(asyncParseClientID(zkc0.get(), lockPath, children.get(0)))); |
| |
| lock0.unlock(); |
| // verification after unlock lock0 |
| assertEquals(State.CLOSED, lock0.getLockState()); |
| assertEquals(0, getLockWaiters(zkc, lockPath).size()); |
| |
| ZKSessionLock lock2 = new ZKSessionLock(zkc, lockPath, clientId2, lockStateExecutor); |
| lock2.tryLock(timeout, TimeUnit.MILLISECONDS); |
| // verification after lock2 lock |
| assertEquals(State.CLOSED, lock0.getLockState()); |
| assertEquals(State.CLOSED, lock1.getLockState()); |
| assertEquals(State.CLAIMED, lock2.getLockState()); |
| children = getLockWaiters(zkc, lockPath); |
| assertEquals(1, children.size()); |
| assertEquals(lock2.getLockId(), Await.result(asyncParseClientID(zkc.get(), lockPath, children.get(0)))); |
| |
| lock2.unlock(); |
| } |
| |
| @Test(timeout = 60000) |
| public void testLockWhenPreviousLockZnodeStillExists() throws Exception { |
| String lockPath = "/test-lock-when-previous-lock-znode-still-exists-" + |
| System.currentTimeMillis(); |
| String clientId = "client-id"; |
| |
| ZooKeeper zk = zkc.get(); |
| |
| createLockPath(zk, lockPath); |
| |
| final ZKSessionLock lock0 = new ZKSessionLock(zkc0, lockPath, clientId, lockStateExecutor); |
| // lock0 lock |
| lock0.tryLock(Long.MAX_VALUE, TimeUnit.MILLISECONDS); |
| |
| // simulate lock0 expires but znode still exists |
| final DistributedLockContext context1 = new DistributedLockContext(); |
| context1.addLockId(lock0.getLockId()); |
| |
| final ZKSessionLock lock1 = new ZKSessionLock(zkc, lockPath, clientId, lockStateExecutor, |
| 60000, NullStatsLogger.INSTANCE, context1); |
| lock1.tryLock(0L, TimeUnit.MILLISECONDS); |
| assertEquals(State.CLAIMED, lock1.getLockState()); |
| lock1.unlock(); |
| |
| final DistributedLockContext context2 = new DistributedLockContext(); |
| context2.addLockId(lock0.getLockId()); |
| |
| final ZKSessionLock lock2 = new ZKSessionLock(zkc, lockPath, clientId, lockStateExecutor, |
| 60000, NullStatsLogger.INSTANCE, context2); |
| lock2.tryLock(Long.MAX_VALUE, TimeUnit.MILLISECONDS); |
| assertEquals(State.CLAIMED, lock2.getLockState()); |
| lock2.unlock(); |
| |
| lock0.unlock(); |
| } |
| |
| @Test(timeout = 60000) |
| public void testWaitForLockUnlock() throws Exception { |
| testWaitForLockReleased("/test-wait-for-lock-unlock", true); |
| } |
| |
| @Test(timeout = 60000) |
| public void testWaitForLockExpired() throws Exception { |
| testWaitForLockReleased("/test-wait-for-lock-expired", false); |
| } |
| |
| /** |
| * Test lock wait for the lock owner to release the lock. The lock waiter should acquire lock successfully |
| * if the lock owner unlock or it is expired. |
| * |
| * @param lockPath |
| * lock path |
| * @param isUnlock |
| * whether to unlock or expire the lock |
| * @throws Exception |
| */ |
| private void testWaitForLockReleased(String lockPath, boolean isUnlock) throws Exception { |
| String clientId0 = "test-wait-for-lock-released-0-" + System.currentTimeMillis(); |
| String clientId1 = "test-wait-for-lock-released-1-" + System.currentTimeMillis(); |
| |
| createLockPath(zkc.get(), lockPath); |
| |
| final ZKSessionLock lock0 = new ZKSessionLock(zkc0, lockPath, clientId0, lockStateExecutor); |
| final ZKSessionLock lock1 = new ZKSessionLock(zkc, lockPath, clientId1, lockStateExecutor); |
| |
| lock0.tryLock(Long.MAX_VALUE, TimeUnit.MILLISECONDS); |
| // verification after lock0 lock |
| assertEquals(State.CLAIMED, lock0.getLockState()); |
| List<String> children = getLockWaiters(zkc0, lockPath); |
| assertEquals(1, children.size()); |
| assertEquals(lock0.getLockId(), Await.result(asyncParseClientID(zkc0.get(), lockPath, children.get(0)))); |
| |
| final CountDownLatch lock1DoneLatch = new CountDownLatch(1); |
| |
| Thread lock1Thread = new Thread(new Runnable() { |
| @Override |
| public void run() { |
| try { |
| lock1.tryLock(Long.MAX_VALUE, TimeUnit.MILLISECONDS); |
| lock1DoneLatch.countDown(); |
| } catch (LockingException e) { |
| logger.error("Failed on locking lock1 : ", e); |
| } |
| } |
| }, "lock1-thread"); |
| lock1Thread.start(); |
| |
| // ensure lock1 is waiting for lock0 |
| children = awaitWaiters(2, zkc, lockPath); |
| |
| if (isUnlock) { |
| lock0.unlock(); |
| } else { |
| ZooKeeperClientUtils.expireSession(zkc0, zkServers, sessionTimeoutMs); |
| } |
| |
| lock1DoneLatch.await(); |
| lock1Thread.join(); |
| |
| // verification after lock2 lock |
| if (isUnlock) { |
| assertEquals(State.CLOSED, lock0.getLockState()); |
| } else { |
| assertEquals(State.EXPIRED, lock0.getLockState()); |
| } |
| assertEquals(State.CLAIMED, lock1.getLockState()); |
| children = getLockWaiters(zkc, lockPath); |
| assertEquals(1, children.size()); |
| assertEquals(lock1.getLockId(), Await.result(asyncParseClientID(zkc.get(), lockPath, children.get(0)))); |
| |
| lock1.unlock(); |
| } |
| |
| /** |
| * Test session expired after claimed the lock: lock state should be changed to expired and notify |
| * the lock listener about expiry. |
| * |
| * @throws Exception |
| */ |
| @Test(timeout = 60000) |
| public void testLockListenerOnExpired() throws Exception { |
| String lockPath = "/test-lock-listener-on-expired"; |
| String clientId = "test-lock-listener-on-expired-" + System.currentTimeMillis(); |
| |
| createLockPath(zkc.get(), lockPath); |
| |
| final CountDownLatch expiredLatch = new CountDownLatch(1); |
| LockListener listener = new LockListener() { |
| @Override |
| public void onExpired() { |
| expiredLatch.countDown(); |
| } |
| }; |
| final ZKSessionLock lock = |
| new ZKSessionLock(zkc, lockPath, clientId, lockStateExecutor).setLockListener(listener); |
| lock.tryLock(Long.MAX_VALUE, TimeUnit.MILLISECONDS); |
| // verification after lock |
| assertEquals(State.CLAIMED, lock.getLockState()); |
| List<String> children = getLockWaiters(zkc, lockPath); |
| assertEquals(1, children.size()); |
| assertEquals(lock.getLockId(), Await.result(asyncParseClientID(zkc.get(), lockPath, children.get(0)))); |
| |
| ZooKeeperClientUtils.expireSession(zkc, zkServers, sessionTimeoutMs); |
| expiredLatch.await(); |
| assertEquals(State.EXPIRED, lock.getLockState()); |
| children = getLockWaiters(zkc, lockPath); |
| assertEquals(0, children.size()); |
| |
| try { |
| lock.tryLock(0, TimeUnit.MILLISECONDS); |
| fail("Should fail on tryLock since lock state has changed."); |
| } catch (LockStateChangedException lsce) { |
| // expected |
| } |
| |
| lock.unlock(); |
| } |
| |
| @Test(timeout = 60000) |
| public void testSessionExpiredBeforeLock0() throws Exception { |
| testSessionExpiredBeforeLock(0); |
| } |
| |
| @Test(timeout = 60000) |
| public void testSessionExpiredBeforeLock1() throws Exception { |
| testSessionExpiredBeforeLock(Long.MAX_VALUE); |
| } |
| |
| /** |
| * Test Session Expired Before Lock does locking. The lock should be closed since |
| * all zookeeper operations would be failed. |
| * |
| * @param timeout |
| * timeout to wait for the lock |
| * @throws Exception |
| */ |
| private void testSessionExpiredBeforeLock(long timeout) throws Exception { |
| String lockPath = "/test-session-expired-before-lock-" + timeout + "-" + System.currentTimeMillis(); |
| String clientId = "test-session-expired-before-lock-" + System.currentTimeMillis(); |
| |
| createLockPath(zkc.get(), lockPath); |
| final AtomicInteger expireCounter = new AtomicInteger(0); |
| final CountDownLatch expiredLatch = new CountDownLatch(1); |
| LockListener listener = new LockListener() { |
| @Override |
| public void onExpired() { |
| expireCounter.incrementAndGet(); |
| } |
| }; |
| final ZKSessionLock lock = new ZKSessionLock(zkc, lockPath, clientId, lockStateExecutor) |
| .setLockListener(listener); |
| // expire session |
| ZooKeeperClientUtils.expireSession(zkc, zkServers, sessionTimeoutMs); |
| // submit a runnable to lock state executor to ensure any state changes happened when session expired |
| lockStateExecutor.submit(lockPath, new SafeRunnable() { |
| @Override |
| public void safeRun() { |
| expiredLatch.countDown(); |
| } |
| }); |
| expiredLatch.await(); |
| // no watcher was registered if never acquired lock successfully |
| assertEquals(State.INIT, lock.getLockState()); |
| try { |
| lock.tryLock(timeout, TimeUnit.MILLISECONDS); |
| fail("Should fail locking using an expired lock"); |
| } catch (LockingException le) { |
| assertTrue(le.getCause() instanceof KeeperException.SessionExpiredException); |
| } |
| assertEquals(State.CLOSED, lock.getLockState()); |
| List<String> children = getLockWaiters(zkc, lockPath); |
| assertEquals(0, children.size()); |
| } |
| |
| @Test(timeout = 60000) |
| public void testSessionExpiredForLockWaiter() throws Exception { |
| String lockPath = "/test-session-expired-for-lock-waiter"; |
| String clientId0 = "test-session-expired-for-lock-waiter-0"; |
| String clientId1 = "test-session-expired-for-lock-waiter-1"; |
| |
| createLockPath(zkc.get(), lockPath); |
| |
| final ZKSessionLock lock0 = new ZKSessionLock(zkc0, lockPath, clientId0, lockStateExecutor); |
| lock0.tryLock(Long.MAX_VALUE, TimeUnit.MILLISECONDS); |
| assertEquals(State.CLAIMED, lock0.getLockState()); |
| List<String> children = getLockWaiters(zkc0, lockPath); |
| assertEquals(1, children.size()); |
| assertEquals(lock0.getLockId(), Await.result(asyncParseClientID(zkc0.get(), lockPath, children.get(0)))); |
| |
| final ZKSessionLock lock1 = new ZKSessionLock(zkc, lockPath, clientId1, lockStateExecutor); |
| final CountDownLatch lock1DoneLatch = new CountDownLatch(1); |
| |
| Thread lock1Thread = new Thread(new Runnable() { |
| @Override |
| public void run() { |
| try { |
| lock1.tryLock(Long.MAX_VALUE, TimeUnit.MILLISECONDS); |
| } catch (OwnershipAcquireFailedException oafe) { |
| lock1DoneLatch.countDown(); |
| } catch (LockingException e) { |
| logger.error("Failed on locking lock1 : ", e); |
| } |
| } |
| }, "lock1-thread"); |
| lock1Thread.start(); |
| |
| // check lock1 is waiting for lock0 |
| children = awaitWaiters(2, zkc, lockPath); |
| |
| assertEquals(2, children.size()); |
| assertEquals(State.CLAIMED, lock0.getLockState()); |
| assertEquals(lock0.getLockId(), Await.result(asyncParseClientID(zkc0.get(), lockPath, children.get(0)))); |
| awaitState(State.WAITING, lock1); |
| assertEquals(lock1.getLockId(), Await.result(asyncParseClientID(zkc.get(), lockPath, children.get(1)))); |
| |
| // expire lock1 |
| ZooKeeperClientUtils.expireSession(zkc, zkServers, sessionTimeoutMs); |
| |
| lock1DoneLatch.countDown(); |
| lock1Thread.join(); |
| assertEquals(State.CLAIMED, lock0.getLockState()); |
| assertEquals(State.CLOSED, lock1.getLockState()); |
| children = getLockWaiters(zkc0, lockPath); |
| assertEquals(1, children.size()); |
| assertEquals(lock0.getLockId(), Await.result(asyncParseClientID(zkc0.get(), lockPath, children.get(0)))); |
| } |
| |
| public void awaitState(State state, ZKSessionLock lock) throws InterruptedException { |
| while (lock.getLockState() != state) { |
| Thread.sleep(50); |
| } |
| } |
| |
| public List<String> awaitWaiters(int waiters, ZooKeeperClient zkc, String lockPath) throws Exception { |
| List<String> children = getLockWaiters(zkc, lockPath); |
| while (children.size() < waiters) { |
| Thread.sleep(50); |
| children = getLockWaiters(zkc, lockPath); |
| } |
| return children; |
| } |
| |
| @Test(timeout = 60000) |
| public void testLockUseSameClientIdButDifferentSessions0() throws Exception { |
| testLockUseSameClientIdButDifferentSessions(true); |
| } |
| |
| @Test(timeout = 60000) |
| public void testLockUseSameClientIdButDifferentSessions1() throws Exception { |
| testLockUseSameClientIdButDifferentSessions(false); |
| } |
| |
| private void testLockUseSameClientIdButDifferentSessions(boolean isUnlock) throws Exception { |
| String lockPath = "/test-lock-use-same-client-id-but-different-sessions-" + isUnlock + System.currentTimeMillis(); |
| String clientId = "test-lock-use-same-client-id-but-different-sessions"; |
| |
| createLockPath(zkc.get(), lockPath); |
| |
| final ZKSessionLock lock0 = new ZKSessionLock(zkc0, lockPath, clientId, lockStateExecutor); |
| |
| lock0.tryLock(Long.MAX_VALUE, TimeUnit.MILLISECONDS); |
| // lock1_0 couldn't claim ownership since owner is in a different zk session. |
| final ZKSessionLock lock1_0 = new ZKSessionLock(zkc, lockPath, clientId, lockStateExecutor); |
| try { |
| lock1_0.tryLock(0, TimeUnit.MILLISECONDS); |
| fail("Should fail locking since the lock is held in a different zk session."); |
| } catch (OwnershipAcquireFailedException oafe) { |
| assertEquals(clientId, oafe.getCurrentOwner()); |
| } |
| assertEquals(State.CLOSED, lock1_0.getLockState()); |
| List<String> children = getLockWaiters(zkc0, lockPath); |
| assertEquals(1, children.size()); |
| assertEquals(lock0.getLockId(), Await.result(asyncParseClientID(zkc0.get(), lockPath, children.get(0)))); |
| |
| // lock1_1 would wait the ownership |
| final ZKSessionLock lock1_1 = new ZKSessionLock(zkc, lockPath, clientId, lockStateExecutor); |
| final CountDownLatch lock1DoneLatch = new CountDownLatch(1); |
| |
| Thread lock1Thread = new Thread(new Runnable() { |
| @Override |
| public void run() { |
| try { |
| lock1_1.tryLock(Long.MAX_VALUE, TimeUnit.MILLISECONDS); |
| lock1DoneLatch.countDown(); |
| } catch (LockingException e) { |
| logger.error("Failed on locking lock1 : ", e); |
| } |
| } |
| }, "lock1-thread"); |
| lock1Thread.start(); |
| |
| // check lock1 is waiting for lock0 |
| children = awaitWaiters(2, zkc, lockPath); |
| |
| logger.info("Found {} lock waiters : {}", children.size(), children); |
| |
| assertEquals(2, children.size()); |
| assertEquals(State.CLAIMED, lock0.getLockState()); |
| assertEquals(lock0.getLockId(), Await.result(asyncParseClientID(zkc0.get(), lockPath, children.get(0)))); |
| awaitState(State.WAITING, lock1_1); |
| assertEquals(lock1_1.getLockId(), Await.result(asyncParseClientID(zkc.get(), lockPath, children.get(1)))); |
| |
| if (isUnlock) { |
| lock0.unlock(); |
| } else { |
| ZooKeeperClientUtils.expireSession(zkc0, zkServers, sessionTimeoutMs); |
| } |
| lock1DoneLatch.await(); |
| lock1Thread.join(); |
| |
| // verification |
| if (isUnlock) { |
| assertEquals(State.CLOSED, lock0.getLockState()); |
| } else { |
| assertEquals(State.EXPIRED, lock0.getLockState()); |
| } |
| assertEquals(State.CLAIMED, lock1_1.getLockState()); |
| children = getLockWaiters(zkc, lockPath); |
| assertEquals(1, children.size()); |
| assertEquals(lock1_1.getLockId(), Await.result(asyncParseClientID(zkc.get(), lockPath, children.get(0)))); |
| |
| lock1_1.unlock(); |
| } |
| |
| @Test(timeout = 60000) |
| public void testLockWithMultipleSiblingWaiters() throws Exception { |
| String lockPath = "/test-lock-with-multiple-sibling-waiters"; |
| String clientId = "client-id"; |
| |
| createLockPath(zkc.get(), lockPath); |
| |
| final ZKSessionLock lock0 = new ZKSessionLock(zkc, lockPath, clientId, lockStateExecutor); |
| final ZKSessionLock lock1 = new ZKSessionLock(zkc, lockPath, clientId, lockStateExecutor); |
| final ZKSessionLock lock2 = new ZKSessionLock(zkc, lockPath, clientId, lockStateExecutor); |
| |
| lock0.tryLock(Long.MAX_VALUE, TimeUnit.MILLISECONDS); |
| lock1.tryLock(Long.MAX_VALUE, TimeUnit.MILLISECONDS); |
| lock2.tryLock(Long.MAX_VALUE, TimeUnit.MILLISECONDS); |
| |
| List<String> children = awaitWaiters(3, zkc, lockPath); |
| |
| assertEquals(3, children.size()); |
| assertEquals(State.CLAIMED, lock0.getLockState()); |
| assertEquals(State.CLAIMED, lock1.getLockState()); |
| assertEquals(State.CLAIMED, lock2.getLockState()); |
| |
| lock0.unlock(); |
| lock1.unlock(); |
| lock2.unlock(); |
| } |
| |
| /** |
| * Immediate lock and unlock first lock |
| * @throws Exception |
| */ |
| @Test(timeout = 60000) |
| public void testLockWhenSiblingUseDifferentLockId0() throws Exception { |
| testLockWhenSiblingUseDifferentLockId(0, true); |
| } |
| |
| /** |
| * Immediate lock and expire first lock |
| * @throws Exception |
| */ |
| @Test(timeout = 60000) |
| public void testLockWhenSiblingUseDifferentLockId1() throws Exception { |
| testLockWhenSiblingUseDifferentLockId(0, false); |
| } |
| |
| /** |
| * Wait Lock and unlock lock0_0 and lock1 |
| * @throws Exception |
| */ |
| @Test(timeout = 60000) |
| public void testLockWhenSiblingUseDifferentLockId2() throws Exception { |
| testLockWhenSiblingUseDifferentLockId(Long.MAX_VALUE, true); |
| } |
| |
| /** |
| * Wait Lock and expire first & third lock |
| * @throws Exception |
| */ |
| @Test(timeout = 60000) |
| public void testLockWhenSiblingUseDifferentLockId3() throws Exception { |
| testLockWhenSiblingUseDifferentLockId(Long.MAX_VALUE, false); |
| } |
| |
| private void testLockWhenSiblingUseDifferentLockId(long timeout, final boolean isUnlock) throws Exception { |
| String lockPath = "/test-lock-when-sibling-use-different-lock-id-" + timeout |
| + "-" + isUnlock + "-" + System.currentTimeMillis(); |
| String clientId0 = "client-id-0"; |
| String clientId1 = "client-id-1"; |
| |
| createLockPath(zkc.get(), lockPath); |
| |
| final ZKSessionLock lock0_0 = new ZKSessionLock(zkc0, lockPath, clientId0, lockStateExecutor); |
| final ZKSessionLock lock0_1 = new ZKSessionLock(zkc0, lockPath, clientId0, lockStateExecutor); |
| final ZKSessionLock lock1 = new ZKSessionLock(zkc, lockPath, clientId1, lockStateExecutor); |
| |
| lock0_0.tryLock(Long.MAX_VALUE, TimeUnit.MILLISECONDS); |
| |
| // lock1 wait for the lock ownership. |
| final CountDownLatch lock1DoneLatch = new CountDownLatch(1); |
| Thread lock1Thread = new Thread(new Runnable() { |
| @Override |
| public void run() { |
| try { |
| lock1.tryLock(Long.MAX_VALUE, TimeUnit.MILLISECONDS); |
| lock1DoneLatch.countDown(); |
| } catch (LockingException e) { |
| logger.error("Failed on locking lock1 : ", e); |
| } |
| } |
| }, "lock1-thread"); |
| lock1Thread.start(); |
| |
| // check lock1 is waiting for lock0_0 |
| List<String> children = awaitWaiters(2, zkc, lockPath); |
| |
| assertEquals(2, children.size()); |
| assertEquals(State.CLAIMED, lock0_0.getLockState()); |
| assertEquals(lock0_0.getLockId(), Await.result(asyncParseClientID(zkc0.get(), lockPath, children.get(0)))); |
| awaitState(State.WAITING, lock1); |
| assertEquals(lock1.getLockId(), Await.result(asyncParseClientID(zkc.get(), lockPath, children.get(1)))); |
| |
| final CountDownLatch lock0DoneLatch = new CountDownLatch(1); |
| final AtomicReference<String> ownerFromLock0 = new AtomicReference<String>(null); |
| Thread lock0Thread = null; |
| if (timeout == 0) { |
| try { |
| lock0_1.tryLock(0, TimeUnit.MILLISECONDS); |
| fail("Should fail on locking if sibling is using differnt lock id."); |
| } catch (OwnershipAcquireFailedException oafe) { |
| assertEquals(clientId0, oafe.getCurrentOwner()); |
| } |
| assertEquals(State.CLOSED, lock0_1.getLockState()); |
| children = getLockWaiters(zkc, lockPath); |
| assertEquals(2, children.size()); |
| assertEquals(State.CLAIMED, lock0_0.getLockState()); |
| assertEquals(lock0_0.getLockId(), Await.result(asyncParseClientID(zkc0.get(), lockPath, children.get(0)))); |
| assertEquals(State.WAITING, lock1.getLockState()); |
| assertEquals(lock1.getLockId(), Await.result(asyncParseClientID(zkc.get(), lockPath, children.get(1)))); |
| } else { |
| lock0Thread = new Thread(new Runnable() { |
| @Override |
| public void run() { |
| try { |
| lock0_1.tryLock(Long.MAX_VALUE, TimeUnit.MILLISECONDS); |
| if (isUnlock) { |
| lock0DoneLatch.countDown(); |
| } |
| } catch (OwnershipAcquireFailedException oafe) { |
| if (!isUnlock) { |
| ownerFromLock0.set(oafe.getCurrentOwner()); |
| lock0DoneLatch.countDown(); |
| } |
| } catch (LockingException le) { |
| logger.error("Failed on locking lock0_1 : ", le); |
| } |
| } |
| }, "lock0-thread"); |
| lock0Thread.start(); |
| |
| // check lock1 is waiting for lock0_0 |
| children = awaitWaiters(3, zkc, lockPath); |
| |
| assertEquals(3, children.size()); |
| assertEquals(State.CLAIMED, lock0_0.getLockState()); |
| assertEquals(lock0_0.getLockId(), Await.result(asyncParseClientID(zkc0.get(), lockPath, children.get(0)))); |
| awaitState(State.WAITING, lock1); |
| assertEquals(lock1.getLockId(), Await.result(asyncParseClientID(zkc.get(), lockPath, children.get(1)))); |
| awaitState(State.WAITING, lock0_1); |
| assertEquals(lock0_1.getLockId(), Await.result(asyncParseClientID(zkc0.get(), lockPath, children.get(2)))); |
| } |
| |
| if (isUnlock) { |
| lock0_0.unlock(); |
| } else { |
| ZooKeeperClientUtils.expireSession(zkc0, zkServers, sessionTimeoutMs); |
| } |
| |
| lock1DoneLatch.await(); |
| lock1Thread.join(); |
| |
| // check the state of lock0_0 |
| if (isUnlock) { |
| assertEquals(State.CLOSED, lock0_0.getLockState()); |
| } else { |
| assertEquals(State.EXPIRED, lock0_0.getLockState()); |
| } |
| |
| if (timeout == 0) { |
| children = getLockWaiters(zkc, lockPath); |
| assertEquals(1, children.size()); |
| assertEquals(State.CLAIMED, lock1.getLockState()); |
| assertEquals(lock1.getLockId(), Await.result(asyncParseClientID(zkc.get(), lockPath, children.get(0)))); |
| } else { |
| assertNotNull(lock0Thread); |
| if (!isUnlock) { |
| // both lock0_0 and lock0_1 would be expired |
| lock0DoneLatch.await(); |
| lock0Thread.join(); |
| |
| assertEquals(clientId0, ownerFromLock0.get()); |
| assertEquals(State.CLOSED, lock0_1.getLockState()); |
| |
| children = getLockWaiters(zkc, lockPath); |
| assertEquals(1, children.size()); |
| assertEquals(State.CLAIMED, lock1.getLockState()); |
| assertEquals(lock1.getLockId(), Await.result(asyncParseClientID(zkc.get(), lockPath, children.get(0)))); |
| } else { |
| children = getLockWaiters(zkc, lockPath); |
| assertEquals(2, children.size()); |
| assertEquals(State.CLAIMED, lock1.getLockState()); |
| assertEquals(lock1.getLockId(), Await.result(asyncParseClientID(zkc.get(), lockPath, children.get(0)))); |
| assertEquals(State.WAITING, lock0_1.getLockState()); |
| assertEquals(lock0_1.getLockId(), Await.result(asyncParseClientID(zkc0.get(), lockPath, children.get(1)))); |
| } |
| } |
| |
| lock1.unlock(); |
| |
| if (timeout != 0 && isUnlock) { |
| lock0DoneLatch.await(); |
| lock0Thread.join(); |
| |
| children = getLockWaiters(zkc, lockPath); |
| assertEquals(1, children.size()); |
| assertEquals(State.CLAIMED, lock0_1.getLockState()); |
| assertEquals(lock0_1.getLockId(), Await.result(asyncParseClientID(zkc0.get(), lockPath, children.get(0)))); |
| } |
| } |
| |
| @Test(timeout = 60000) |
| public void testLockWhenSiblingUseSameLockId0() throws Exception { |
| testLockWhenSiblingUseSameLockId(0, true); |
| } |
| |
| @Test(timeout = 60000) |
| public void testLockWhenSiblingUseSameLockId1() throws Exception { |
| testLockWhenSiblingUseSameLockId(0, false); |
| } |
| |
| @Test(timeout = 60000) |
| public void testLockWhenSiblingUseSameLockId2() throws Exception { |
| testLockWhenSiblingUseSameLockId(Long.MAX_VALUE, true); |
| } |
| |
| @Test(timeout = 60000) |
| public void testLockWhenSiblingUseSameLockId3() throws Exception { |
| testLockWhenSiblingUseSameLockId(Long.MAX_VALUE, false); |
| } |
| |
| private void testLockWhenSiblingUseSameLockId(long timeout, final boolean isUnlock) throws Exception { |
| String lockPath = "/test-lock-when-sibling-use-same-lock-id-" + timeout |
| + "-" + isUnlock + "-" + System.currentTimeMillis(); |
| String clientId = "client-id"; |
| |
| createLockPath(zkc.get(), lockPath); |
| |
| final ZKSessionLock lock0 = new ZKSessionLock(zkc0, lockPath, clientId, lockStateExecutor); |
| final ZKSessionLock lock1 = new ZKSessionLock(zkc0, lockPath, clientId, lockStateExecutor); |
| |
| lock0.tryLock(Long.MAX_VALUE, TimeUnit.MILLISECONDS); |
| List<String> children = getLockWaiters(zkc0, lockPath); |
| assertEquals(1, children.size()); |
| assertEquals(State.CLAIMED, lock0.getLockState()); |
| assertEquals(lock0.getLockId(), Await.result(asyncParseClientID(zkc0.get(), lockPath, children.get(0)))); |
| |
| lock1.tryLock(timeout, TimeUnit.MILLISECONDS); |
| children = getLockWaiters(zkc0, lockPath); |
| assertEquals(2, children.size()); |
| assertEquals(State.CLAIMED, lock0.getLockState()); |
| assertEquals(lock0.getLockId(), Await.result(asyncParseClientID(zkc0.get(), lockPath, children.get(0)))); |
| assertEquals(State.CLAIMED, lock1.getLockState()); |
| assertEquals(lock1.getLockId(), Await.result(asyncParseClientID(zkc0.get(), lockPath, children.get(1)))); |
| |
| if (isUnlock) { |
| lock0.unlock(); |
| assertEquals(State.CLOSED, lock0.getLockState()); |
| children = getLockWaiters(zkc0, lockPath); |
| assertEquals(1, children.size()); |
| assertEquals(State.CLAIMED, lock1.getLockState()); |
| assertEquals(lock1.getLockId(), Await.result(asyncParseClientID(zkc0.get(), lockPath, children.get(0)))); |
| lock1.unlock(); |
| } else { |
| ZooKeeperClientUtils.expireSession(zkc0, zkServers, sessionTimeoutMs); |
| final CountDownLatch latch = new CountDownLatch(1); |
| lockStateExecutor.submit(lockPath, new SafeRunnable() { |
| @Override |
| public void safeRun() { |
| latch.countDown(); |
| } |
| }); |
| latch.await(); |
| children = getLockWaiters(zkc, lockPath); |
| assertEquals(0, children.size()); |
| assertEquals(State.EXPIRED, lock0.getLockState()); |
| assertEquals(State.EXPIRED, lock1.getLockState()); |
| } |
| } |
| |
| } |
