Examples of com.google.enterprise.connector.util.diffing.CheckpointAndChangeQueue.resume()

Package com.google.enterprise.connector.util.diffing

Class com.google.enterprise.connector.util.diffing.CheckpointAndChangeQueue

Examples of com.google.enterprise.connector.util.diffing.CheckpointAndChangeQueue.resume()

com.google.enterprise.connector.util.diffing.CheckpointAndChangeQueue.resume()
Returns an {@link Iterator} for currently available{@link CheckpointAndChange} objects that occur after the passed incheckpoint. The {@link String} form of a {@link DiffingConnectorCheckpoint}passed in is produced by calling {@link DiffingConnectorCheckpoint#toString()}. As a side effect, Objects up to and including the object with the passed in checkpoint are removed from this queue. @param checkpointString null means return all {@link CheckpointAndChange}objects and a non null value means to return {@link CheckpointAndChange} objects with checkpoints after thepassed in value. @throws IOException if error occurs while manipulating recovery state

    q.setMaximumQueueSize(5);
    q.start(null);
    String checkpoint = null;
    checkpoint = checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 0, 2);
    checkpoint = checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 2, 1);
    Iterator<CheckpointAndChange> it = q.resume(checkpoint).iterator();
    assertFalse(it.hasNext());
    checkpoint = checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 3, 2);
    it = q.resume(checkpoint).iterator();
    assertFalse(it.hasNext());
  }

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    String checkpoint = null;
    checkpoint = checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 0, 2);
    checkpoint = checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 2, 1);
    Iterator<CheckpointAndChange> it = q.resume(checkpoint).iterator();
    assertFalse(it.hasNext());
    checkpoint = checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 3, 2);
    it = q.resume(checkpoint).iterator();
    assertFalse(it.hasNext());
  }


  private String checkChangesAndReturnLastCheckpoint(List<CheckpointAndChange> list,

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    checkpoint = checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 0, 2);
    checkpoint = checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 2, 1);
    Iterator<CheckpointAndChange> it = q.resume(checkpoint).iterator();
    assertFalse(it.hasNext());
    checkpoint = checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 3, 2);
    it = q.resume(checkpoint).iterator();
    assertFalse(it.hasNext());
  }


  private String checkChangesAndReturnLastCheckpoint(List<CheckpointAndChange> list,
      int start, int count) {

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    ChangeSource changeSource = new MockChangeSource(6);
    CheckpointAndChangeQueue q = new CheckpointAndChangeQueue(changeSource,
        persistDir, internalFactory, clientFactory);
    q.setMaximumQueueSize(2);
    q.start(null);
    List<CheckpointAndChange> firstBatch = q.resume(null);
    String checkpoint = firstBatch.get(1).getCheckpoint().toString();
    List<CheckpointAndChange> secondBatch = q.resume(checkpoint);


    CheckpointAndChangeQueue q2 = new CheckpointAndChangeQueue(changeSource,
        persistDir, internalFactory, clientFactory);

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        persistDir, internalFactory, clientFactory);
    q.setMaximumQueueSize(2);
    q.start(null);
    List<CheckpointAndChange> firstBatch = q.resume(null);
    String checkpoint = firstBatch.get(1).getCheckpoint().toString();
    List<CheckpointAndChange> secondBatch = q.resume(checkpoint);


    CheckpointAndChangeQueue q2 = new CheckpointAndChangeQueue(changeSource,
        persistDir, internalFactory, clientFactory);
    q2.setMaximumQueueSize(2);
    q2.start(checkpoint);

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    CheckpointAndChangeQueue q2 = new CheckpointAndChangeQueue(changeSource,
        persistDir, internalFactory, clientFactory);
    q2.setMaximumQueueSize(2);
    q2.start(checkpoint);
    List<CheckpointAndChange> secondBatchAgain = q2.resume(checkpoint);
    assertEquals(secondBatch, secondBatchAgain);
  }


  public void testRepeatedRecoveryAtSameCheckpoint() throws IOException {
    ChangeSource changeSource = new MockChangeSource(6);

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    ChangeSource changeSource = new MockChangeSource(6);
    CheckpointAndChangeQueue q = new CheckpointAndChangeQueue(changeSource,
        persistDir, internalFactory, clientFactory);
    q.setMaximumQueueSize(2);
    q.start(null);
    List<CheckpointAndChange> firstBatch = q.resume(null);
    String checkpoint = firstBatch.get(1).getCheckpoint().toString();
    List<CheckpointAndChange> secondBatch = q.resume(checkpoint);


    CheckpointAndChangeQueue q2 = new CheckpointAndChangeQueue(changeSource,
        persistDir, internalFactory, clientFactory);

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        persistDir, internalFactory, clientFactory);
    q.setMaximumQueueSize(2);
    q.start(null);
    List<CheckpointAndChange> firstBatch = q.resume(null);
    String checkpoint = firstBatch.get(1).getCheckpoint().toString();
    List<CheckpointAndChange> secondBatch = q.resume(checkpoint);


    CheckpointAndChangeQueue q2 = new CheckpointAndChangeQueue(changeSource,
        persistDir, internalFactory, clientFactory);
    q2.setMaximumQueueSize(2);
    q2.start(checkpoint);

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    CheckpointAndChangeQueue q2 = new CheckpointAndChangeQueue(changeSource,
        persistDir, internalFactory, clientFactory);
    q2.setMaximumQueueSize(2);
    q2.start(checkpoint);
    List<CheckpointAndChange> secondBatchAgain = q2.resume(checkpoint);
    assertEquals(secondBatch, secondBatchAgain);


    CheckpointAndChangeQueue q3 = new CheckpointAndChangeQueue(changeSource,
        persistDir, internalFactory,clientFactory);
    q3.setMaximumQueueSize(2);

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    CheckpointAndChangeQueue q3 = new CheckpointAndChangeQueue(changeSource,
        persistDir, internalFactory,clientFactory);
    q3.setMaximumQueueSize(2);
    q3.start(checkpoint);
    List<CheckpointAndChange> secondBatchThrice = q3.resume(checkpoint);
    assertEquals(secondBatch, secondBatchThrice);


    CheckpointAndChangeQueue q4 = new CheckpointAndChangeQueue(changeSource,
        persistDir, internalFactory, clientFactory);
    q4.setMaximumQueueSize(2);

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