Examples with ReentrantLock java.util.concurrent.locks.ReentrantLock used on opensource projects

Example 71 with ReentrantLock

use of java.util.concurrent.locks.ReentrantLock in project sling by apache.

the class TestOakSyncTokenService method testTwoNodesOneLeaving.

@Test
public void testTwoNodesOneLeaving() throws Exception {
    logger.info("testTwoNodesOneLeaving: start");
    String slingId2 = UUID.randomUUID().toString();
    DummyTopologyView two1 = TestHelper.newView(true, slingId1, slingId1, slingId1, slingId2);
    Lock lock1 = new ReentrantLock();
    OakBacklogClusterSyncService cs1 = OakBacklogClusterSyncService.testConstructorAndActivate(new SimpleCommonsConfig(), idMapService1, new DummySlingSettingsService(slingId1), factory1);
    ViewStateManager vsm1 = ViewStateManagerFactory.newViewStateManager(lock1, cs1);
    DummyListener l = new DummyListener();
    vsm1.bind(l);
    vsm1.handleActivated();
    vsm1.handleNewView(two1);
    cs1.triggerBackgroundCheck();
    assertEquals(0, l.countEvents());
    DescriptorHelper.setDiscoveryLiteDescriptor(factory1, new DiscoveryLiteDescriptorBuilder().setFinal(true).me(1).seq(1).activeIds(1).deactivatingIds(2));
    cs1.triggerBackgroundCheck();
    assertEquals(0, l.countEvents());
    // make an assertion that the background runnable is at this stage - even with
    // a 2sec sleep - waiting for the deactivating instance to disappear
    logger.info("testTwoNodesOneLeaving: sync service should be waiting for backlog to disappear");
    Thread.sleep(2000);
    BackgroundCheckRunnable backgroundCheckRunnable = cs1.backgroundCheckRunnable;
    assertNotNull(backgroundCheckRunnable);
    assertFalse(backgroundCheckRunnable.isDone());
    assertFalse(backgroundCheckRunnable.cancelled());
    // release the deactivating instance by removing it from the clusterView
    logger.info("testTwoNodesOneLeaving: freeing backlog - sync service should finish up");
    DescriptorHelper.setDiscoveryLiteDescriptor(factory1, new DiscoveryLiteDescriptorBuilder().setFinal(true).me(1).seq(2).activeIds(1));
    cs1.triggerBackgroundCheck();
    // now give this thing 2 sec to settle
    Thread.sleep(2000);
    // after that, the backgroundRunnable should be done and no events stuck in vsm
    backgroundCheckRunnable = cs1.backgroundCheckRunnable;
    assertNotNull(backgroundCheckRunnable);
    assertFalse(backgroundCheckRunnable.cancelled());
    assertTrue(backgroundCheckRunnable.isDone());
    assertEquals(0, vsm1.waitForAsyncEvents(1000));
    logger.info("testTwoNodesOneLeaving: setting up 2nd node");
    Lock lock2 = new ReentrantLock();
    IdMapService idMapService2 = IdMapService.testConstructor(new SimpleCommonsConfig(), new DummySlingSettingsService(slingId2), factory2);
    OakBacklogClusterSyncService cs2 = OakBacklogClusterSyncService.testConstructorAndActivate(new SimpleCommonsConfig(), idMapService2, new DummySlingSettingsService(slingId2), factory2);
    ViewStateManager vsm2 = ViewStateManagerFactory.newViewStateManager(lock2, cs2);
    cs1.triggerBackgroundCheck();
    cs2.triggerBackgroundCheck();
    assertEquals(1, l.countEvents());
    DescriptorHelper.setDiscoveryLiteDescriptor(factory2, new DiscoveryLiteDescriptorBuilder().setFinal(true).me(2).seq(3).activeIds(1, 2));
    cs1.triggerBackgroundCheck();
    cs2.triggerBackgroundCheck();
    assertEquals(1, l.countEvents());
    DescriptorHelper.setDiscoveryLiteDescriptor(factory1, new DiscoveryLiteDescriptorBuilder().setFinal(true).me(1).seq(3).activeIds(1, 2));
    cs1.triggerBackgroundCheck();
    cs2.triggerBackgroundCheck();
    assertEquals(1, l.countEvents());
    vsm2.handleActivated();
    assertTrue(idMapService1.waitForInit(5000));
    assertTrue(idMapService2.waitForInit(5000));
    DummyTopologyView two2 = TestHelper.newView(two1.getLocalClusterSyncTokenId(), two1.getLocalInstance().getClusterView().getId(), true, slingId1, slingId1, slingId1, slingId2);
    vsm2.handleNewView(two2);
    cs1.triggerBackgroundCheck();
    cs1.triggerBackgroundCheck();
    cs2.triggerBackgroundCheck();
    cs2.triggerBackgroundCheck();
    assertEquals(0, vsm1.waitForAsyncEvents(1000));
    assertEquals(1, l.countEvents());
    logger.info("testTwoNodesOneLeaving: removing instance2 from the view - even though vsm1 didn't really know about it, it should send a TOPOLOGY_CHANGING - we leave it as deactivating for now...");
    DummyTopologyView oneLeaving = two1.clone();
    oneLeaving.removeInstance(slingId2);
    DescriptorHelper.setDiscoveryLiteDescriptor(factory1, new DiscoveryLiteDescriptorBuilder().setFinal(true).me(1).seq(1).activeIds(1).deactivatingIds(2));
    vsm1.handleNewView(oneLeaving);
    cs1.triggerBackgroundCheck();
    cs2.triggerBackgroundCheck();
    // wait for TOPOLOGY_CHANGING to be received by vsm1
    assertEquals(0, vsm1.waitForAsyncEvents(5000));
    assertEquals(2, l.countEvents());
    logger.info("testTwoNodesOneLeaving: marking instance2 as no longer deactivating, so vsm1 should now send a TOPOLOGY_CHANGED");
    DescriptorHelper.setDiscoveryLiteDescriptor(factory1, new DiscoveryLiteDescriptorBuilder().setFinal(true).me(1).seq(2).activeIds(1).inactiveIds(2));
    cs1.triggerBackgroundCheck();
    cs2.triggerBackgroundCheck();
    // wait for TOPOLOGY_CHANGED to be received by vsm1
    assertEquals(0, vsm1.waitForAsyncEvents(5000));
    RepositoryTestHelper.dumpRepo(factory1);
    assertEquals(3, l.countEvents());
}

Example 72 with ReentrantLock

use of java.util.concurrent.locks.ReentrantLock in project sling by apache.

the class TestSlowViewStateManager method testClusterSyncService_withConcurrency.

//TODO test takes env 10sec
@Category(Slow.class)
@Test
public void testClusterSyncService_withConcurrency() throws Exception {
    final org.apache.log4j.Logger commonsLogger = LogManager.getRootLogger().getLogger("org.apache.sling.discovery.commons.providers");
    final org.apache.log4j.Level logLevel = commonsLogger.getLevel();
    // change here to DEBUG in case of issues with this test
    commonsLogger.setLevel(Level.INFO);
    final Semaphore serviceSemaphore = new Semaphore(0);
    final Semaphore testSemaphore = new Semaphore(0);
    final ReentrantLock lock = new ReentrantLock();
    final ClusterSyncServiceWithSemaphore cs = new ClusterSyncServiceWithSemaphore(lock, serviceSemaphore);
    mgr = new ViewStateManagerImpl(lock, cs);
    final DummyListener listener = new DummyListener();
    mgr.bind(listener);
    TestHelper.assertNoEvents(listener);
    mgr.handleActivated();
    TestHelper.assertNoEvents(listener);
    final String slingId1 = UUID.randomUUID().toString();
    final String slingId2 = UUID.randomUUID().toString();
    final String slingId3 = UUID.randomUUID().toString();
    final String clusterId = UUID.randomUUID().toString();
    final DefaultClusterView cluster = new DefaultClusterView(clusterId);
    final DummyTopologyView view1 = new DummyTopologyView().addInstance(slingId1, cluster, true, true).addInstance(slingId2, cluster, false, false).addInstance(slingId3, cluster, false, false);
    final DummyTopologyView view2 = DummyTopologyView.clone(view1).removeInstance(slingId2);
    final DummyTopologyView view3 = DummyTopologyView.clone(view1).removeInstance(slingId2).removeInstance(slingId3);
    async(new Runnable() {

        public void run() {
            mgr.handleNewView(view1);
        }
    });
    Thread.sleep(1000);
    TestHelper.assertNoEvents(listener);
    assertEquals("should have one thread now waiting", 1, serviceSemaphore.getQueueLength());
    // release the first one only
    serviceSemaphore.release(1);
    Thread.sleep(1000);
    assertEvents(listener, EventHelper.newInitEvent(view1));
    mgr.handleChanging();
    assertEquals(0, mgr.waitForAsyncEvents(500));
    assertEvents(listener, EventHelper.newChangingEvent(view1));
    async(new Runnable() {

        public void run() {
            mgr.handleNewView(view2);
        }
    });
    logger.debug("run: waiting 1sec");
    Thread.sleep(1000);
    logger.debug("run: asserting no events");
    TestHelper.assertNoEvents(listener);
    assertEquals("should have one thread now waiting", 1, serviceSemaphore.getQueueLength());
    assertFalse("should not be locked", lock.isLocked());
    logger.debug("run: issuing a second event");
    // before releasing, issue another event, lets do a combination of changing/changed
    async(new Runnable() {

        public void run() {
            logger.debug("run2: calling handleChanging...");
            mgr.handleChanging();
            try {
                logger.debug("run2: done with handleChanging, acquiring testSemaphore...");
                testSemaphore.acquire();
                logger.debug("run2: calling handleNewView...");
                mgr.handleNewView(view3);
                logger.debug("run2: done with handleNewView...");
            } catch (InterruptedException e) {
                // fail
                logger.error("interrupted: " + e, e);
            }
        }
    });
    logger.debug("run: waiting 1sec");
    Thread.sleep(1000);
    int remainingAsyncEvents = mgr.waitForAsyncEvents(2000);
    logger.info("run: result of waitForAsyncEvent is: " + remainingAsyncEvents);
    assertEquals("should have one thread now waiting", 1, serviceSemaphore.getQueueLength());
    assertEquals("should be acquiring (by thread2)", 1, testSemaphore.getQueueLength());
    // releasing the testSemaphore
    testSemaphore.release();
    logger.debug("run: waiting 1sec");
    Thread.sleep(1000);
    assertEquals("should have two async events now in the queue or being sent", 2, mgr.waitForAsyncEvents(500));
    assertEquals("but should only have 1 thread actually sitting on the semaphore waiting", 1, serviceSemaphore.getQueueLength());
    logger.debug("run: releasing consistencyService");
    // release the first one only
    serviceSemaphore.release(1);
    logger.debug("run: waiting 1sec");
    Thread.sleep(1000);
    assertFalse("should not be locked", lock.isLocked());
    // this should not have triggered any event 
    TestHelper.assertNoEvents(listener);
    // then release the 2nd one
    serviceSemaphore.release(1);
    logger.debug("run: waiting 1sec");
    Thread.sleep(1000);
    logger.debug("run: asserting 1 event");
    final TopologyEvent changedEvent = EventHelper.newChangedEvent(view1, view3);
    assertEvents(listener, changedEvent);
    // back to default
    commonsLogger.setLevel(Level.INFO);
}

Example 73 with ReentrantLock

use of java.util.concurrent.locks.ReentrantLock in project sling by apache.

the class TestOakSyncTokenService method testOneNode.

@Test
public void testOneNode() throws Exception {
    logger.info("testOneNode: start");
    DummyTopologyView one = TestHelper.newView(true, slingId1, slingId1, slingId1);
    Lock lock = new ReentrantLock();
    OakBacklogClusterSyncService cs = OakBacklogClusterSyncService.testConstructorAndActivate(new SimpleCommonsConfig(), idMapService1, new DummySlingSettingsService(slingId1), factory1);
    ViewStateManager vsm = ViewStateManagerFactory.newViewStateManager(lock, cs);
    DummyListener l = new DummyListener();
    assertEquals(0, l.countEvents());
    vsm.bind(l);
    cs.triggerBackgroundCheck();
    assertEquals(0, l.countEvents());
    vsm.handleActivated();
    cs.triggerBackgroundCheck();
    assertEquals(0, l.countEvents());
    vsm.handleNewView(one);
    cs.triggerBackgroundCheck();
    assertEquals(0, l.countEvents());
    cs.triggerBackgroundCheck();
    DescriptorHelper.setDiscoveryLiteDescriptor(factory1, new DiscoveryLiteDescriptorBuilder().me(1).seq(1).activeIds(1).setFinal(true));
    assertTrue(idMapService1.waitForInit(5000));
    cs.triggerBackgroundCheck();
    assertEquals(0, vsm.waitForAsyncEvents(1000));
    assertEquals(1, l.countEvents());
    logger.info("testOneNode: end");
}

Example 74 with ReentrantLock

use of java.util.concurrent.locks.ReentrantLock in project sling by apache.

the class ClusterTest method newMgr.

private ViewStateManagerImpl newMgr() {
    ViewStateManagerImpl mgr = new ViewStateManagerImpl(new ReentrantLock(), new ClusterSyncService() {

        public void sync(BaseTopologyView view, Runnable callback) {
            callback.run();
        }

        @Override
        public void cancelSync() {
        // nothing to cancel, we're auto-run
        }
    });
    mgrList.add(mgr);
    return mgr;
}

Example 75 with ReentrantLock

use of java.util.concurrent.locks.ReentrantLock in project sling by apache.

the class TestMinEventDelayHandler method setup.

@Before
public void setup() throws Exception {
    mgr = new ViewStateManagerImpl(new ReentrantLock(), new ClusterSyncService() {

        @Override
        public void sync(BaseTopologyView view, Runnable callback) {
            callback.run();
        }

        @Override
        public void cancelSync() {
        // nothing to cancel, we're auto-run
        }
    });
    // I want randomness yes, but deterministic, for some methods at least
    defaultRandom = new Random(1234123412);
    scheduler = new DummyScheduler();
    sds = new DummyDiscoveryService();
    mgr.installMinEventDelayHandler(sds, scheduler, 1);
    final org.apache.log4j.Logger discoveryLogger = RootLogger.getLogger("org.apache.sling.discovery");
    logLevel = discoveryLogger.getLevel();
    // changed from Level.DEBUG
    discoveryLogger.setLevel(Level.INFO);
}