Examples with LedgerMetadataListener org.apache.bookkeeper.proto.BookkeeperInternalCallbacks.LedgerMetadataListener used on opensource projects

Example 6 with LedgerMetadataListener

use of org.apache.bookkeeper.proto.BookkeeperInternalCallbacks.LedgerMetadataListener in project bookkeeper by apache.

the class AbstractZkLedgerManagerTest method testLedgerMetadataListenerOnLedgerDeletedEvent.

@Test
public void testLedgerMetadataListenerOnLedgerDeletedEvent() throws Exception {
    long ledgerId = System.currentTimeMillis();
    String ledgerStr = String.valueOf(ledgerId);
    LinkedBlockingQueue<Optional<LedgerMetadata>> changes = new LinkedBlockingQueue<>();
    LedgerMetadataListener listener = (ledgerId1, metadata) -> changes.add(Optional.ofNullable(metadata));
    metadata.setVersion(new LongVersion(1234L));
    Stat stat = mock(Stat.class);
    when(stat.getVersion()).thenReturn(1234);
    when(stat.getCtime()).thenReturn(metadata.getCtime());
    mockZkGetData(ledgerStr, true, KeeperException.Code.OK.intValue(), metadata.serialize(), stat);
    ledgerManager.registerLedgerMetadataListener(ledgerId, listener);
    assertTrue(ledgerManager.listeners.containsKey(ledgerId));
    // the listener will be notified with first get
    LedgerMetadata change1 = changes.take().get();
    assertEquals(metadata, change1);
    verify(mockZk, times(1)).getData(anyString(), any(Watcher.class), any(DataCallback.class), any());
    // the watcher is registered for receiving watched event
    assertTrue(watchers.containsKey(ledgerStr));
    // notify the watcher event
    notifyWatchedEvent(EventType.NodeDeleted, KeeperState.SyncConnected, ledgerStr);
    // the listener should be removed from listener set and a null change is notified.
    Optional<LedgerMetadata> change2 = changes.take();
    assertFalse(change2.isPresent());
    // no more `getData` is called.
    verify(mockZk, times(1)).getData(anyString(), any(Watcher.class), any(DataCallback.class), any());
    // listener is automatically unregistered after a ledger is deleted.
    assertFalse(ledgerManager.listeners.containsKey(ledgerId));
}

Example 7 with LedgerMetadataListener

use of org.apache.bookkeeper.proto.BookkeeperInternalCallbacks.LedgerMetadataListener in project bookkeeper by apache.

the class AbstractZkLedgerManagerTest method testLedgerMetadataListenerOnSessionExpired.

@Test
public void testLedgerMetadataListenerOnSessionExpired() throws Exception {
    long ledgerId = System.currentTimeMillis();
    String ledgerStr = String.valueOf(ledgerId);
    LinkedBlockingQueue<LedgerMetadata> changes = new LinkedBlockingQueue<>();
    LedgerMetadataListener listener = (ledgerId1, metadata) -> changes.add(metadata);
    metadata.setVersion(new LongVersion(1234L));
    Stat stat = mock(Stat.class);
    when(stat.getVersion()).thenReturn(1234);
    when(stat.getCtime()).thenReturn(metadata.getCtime());
    mockZkGetData(ledgerStr, true, KeeperException.Code.OK.intValue(), metadata.serialize(), stat);
    ledgerManager.registerLedgerMetadataListener(ledgerId, listener);
    // the listener will be notified with first get
    LedgerMetadata change1 = changes.take();
    assertEquals(metadata, change1);
    verify(mockZk, times(1)).getData(anyString(), any(Watcher.class), any(DataCallback.class), any());
    // the watcher is registered for receiving watched event
    assertTrue(watchers.containsKey(ledgerStr));
    Set<Watcher> watcherSet1 = watchers.get(ledgerStr);
    assertEquals(1, watcherSet1.size());
    Watcher registeredWatcher1 = watcherSet1.stream().findFirst().get();
    // simulate session expired
    notifyWatchedEvent(EventType.None, KeeperState.Expired, ledgerStr);
    // ledger manager will retry to read metadata again
    LedgerMetadata change2 = changes.take();
    assertEquals(metadata, change2);
    verify(mockZk, times(2)).getData(anyString(), any(Watcher.class), any(DataCallback.class), any());
    // the watcher is registered for receiving watched event
    assertTrue(watchers.containsKey(ledgerStr));
    Set<Watcher> watcherSet2 = watchers.get(ledgerStr);
    assertEquals(1, watcherSet2.size());
    Watcher registeredWatcher2 = watcherSet2.stream().findFirst().get();
    assertSame(registeredWatcher1, registeredWatcher2);
}

Example 8 with LedgerMetadataListener

use of org.apache.bookkeeper.proto.BookkeeperInternalCallbacks.LedgerMetadataListener in project bookkeeper by apache.

the class AbstractZkLedgerManagerTest method testLedgerMetadataListenerOnLedgerDeleted.

@Test
public void testLedgerMetadataListenerOnLedgerDeleted() throws Exception {
    long ledgerId = System.currentTimeMillis();
    String ledgerStr = String.valueOf(ledgerId);
    LinkedBlockingQueue<Optional<LedgerMetadata>> changes = new LinkedBlockingQueue<>();
    LedgerMetadataListener listener = (ledgerId1, metadata) -> changes.add(Optional.ofNullable(metadata));
    metadata.setVersion(new LongVersion(1234L));
    Stat stat = mock(Stat.class);
    when(stat.getVersion()).thenReturn(1234);
    when(stat.getCtime()).thenReturn(metadata.getCtime());
    mockZkGetData(ledgerStr, true, KeeperException.Code.OK.intValue(), metadata.serialize(), stat);
    ledgerManager.registerLedgerMetadataListener(ledgerId, listener);
    assertTrue(ledgerManager.listeners.containsKey(ledgerId));
    // the listener will be notified with first get
    LedgerMetadata change1 = changes.take().get();
    assertEquals(metadata, change1);
    verify(mockZk, times(1)).getData(anyString(), any(Watcher.class), any(DataCallback.class), any());
    // the watcher is registered for receiving watched event
    assertTrue(watchers.containsKey(ledgerStr));
    // mock get data to simulate an ledger is deleted
    mockZkGetData(ledgerStr, true, KeeperException.Code.NONODE.intValue(), null, null);
    // notify the watcher event
    notifyWatchedEvent(EventType.NodeDataChanged, KeeperState.SyncConnected, ledgerStr);
    // the listener should be removed from listener set and not receive an updated metadata anymore
    Optional<LedgerMetadata> change2 = changes.take();
    assertFalse(change2.isPresent());
    assertFalse(ledgerManager.listeners.containsKey(ledgerId));
    // verify scheduler: the listener is only triggered once
    verify(scheduler, times(1)).submit(any(Runnable.class));
    verify(scheduler, times(0)).schedule(any(Runnable.class), anyLong(), any(TimeUnit.class));
    // no watcher is registered
    assertFalse(watchers.containsKey(ledgerStr));
}