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

    checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 0, 2);
    // Replay the first batch.
    checkpoint = checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 0, 2);
    checkpoint = checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 2, 2);
    checkpoint = checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 4, 2);
    assertFalse(q.resume(checkpoint).iterator().hasNext());
  }


  /**
   * Tests retrying a batch after the first one.
   */

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    CheckpointAndChangeQueue q = new CheckpointAndChangeQueue(changeSource,
        persistDir, internalFactory, clientFactory);
    q.setMaximumQueueSize(2);
    q.start(null);
    String checkpoint = null;
    checkpoint = checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 0, 2);
    // We call q.resume but do not set checkpoint forward to reflect the
    // changes from the batch.
    checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 2, 2);
    // Since we have not advanced checkpoint we replay the batch.
    checkpoint = checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 2, 2);

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    q.start(null);
    String checkpoint = null;
    checkpoint = checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 0, 2);
    // We call q.resume but do not set checkpoint forward to reflect the
    // changes from the batch.
    checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 2, 2);
    // Since we have not advanced checkpoint we replay the batch.
    checkpoint = checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 2, 2);
    checkpoint = checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 4, 2);
    assertFalse(q.resume(checkpoint).iterator().hasNext());
  }

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    checkpoint = checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 0, 2);
    // We call q.resume but do not set checkpoint forward to reflect the
    // changes from the batch.
    checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 2, 2);
    // Since we have not advanced checkpoint we replay the batch.
    checkpoint = checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 2, 2);
    checkpoint = checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 4, 2);
    assertFalse(q.resume(checkpoint).iterator().hasNext());
  }


  /**

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    // We call q.resume but do not set checkpoint forward to reflect the
    // changes from the batch.
    checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 2, 2);
    // Since we have not advanced checkpoint we replay the batch.
    checkpoint = checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 2, 2);
    checkpoint = checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 4, 2);
    assertFalse(q.resume(checkpoint).iterator().hasNext());
  }


  /**
   * Tests resuming from a checkpoint that is half way through the first batch.

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    // changes from the batch.
    checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 2, 2);
    // Since we have not advanced checkpoint we replay the batch.
    checkpoint = checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 2, 2);
    checkpoint = checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 4, 2);
    assertFalse(q.resume(checkpoint).iterator().hasNext());
  }


  /**
   * Tests resuming from a checkpoint that is half way through the first batch.
   */

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    ChangeSource changeSource = new MockChangeSource(8);
    CheckpointAndChangeQueue q = new CheckpointAndChangeQueue(changeSource,
        persistDir, internalFactory, clientFactory);
    q.setMaximumQueueSize(3);
    q.start(null);
    Iterator<CheckpointAndChange> it = q.resume(null).iterator();
    CheckpointAndChange checkpointAndChange = it.next();
    MockChangeSource.validateChange(0, checkpointAndChange.getChange());
    assertTrue(it.hasNext());
    checkpointAndChange = it.next();
    MockChangeSource.validateChange(1, checkpointAndChange.getChange());

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    assertTrue(it.hasNext());
    checkpointAndChange = it.next();
    MockChangeSource.validateChange(1, checkpointAndChange.getChange());
    assertTrue(it.hasNext());
    String checkpoint = checkChangesAndReturnLastCheckpoint(
        q.resume(checkpointAndChange.getCheckpoint().toString()), 2, 3);
    checkpoint = checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 5, 3);
    assertFalse(q.resume(checkpoint).iterator().hasNext());
  }


  /**

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    checkpointAndChange = it.next();
    MockChangeSource.validateChange(1, checkpointAndChange.getChange());
    assertTrue(it.hasNext());
    String checkpoint = checkChangesAndReturnLastCheckpoint(
        q.resume(checkpointAndChange.getCheckpoint().toString()), 2, 3);
    checkpoint = checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 5, 3);
    assertFalse(q.resume(checkpoint).iterator().hasNext());
  }


  /**
   * Tests resume for a null checkpoint when the {@link ChangeSource} is empty.

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    MockChangeSource.validateChange(1, checkpointAndChange.getChange());
    assertTrue(it.hasNext());
    String checkpoint = checkChangesAndReturnLastCheckpoint(
        q.resume(checkpointAndChange.getCheckpoint().toString()), 2, 3);
    checkpoint = checkChangesAndReturnLastCheckpoint(q.resume(checkpoint), 5, 3);
    assertFalse(q.resume(checkpoint).iterator().hasNext());
  }


  /**
   * Tests resume for a null checkpoint when the {@link ChangeSource} is empty.
   */

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