Examples of net.sf.katta.operation.master.MasterOperation

net.sf.katta.operation.master.MasterOperation
An operation carried out by the master node. If an {@link InterruptedException} is thrown during the operations{@link #execute(MasterContext)} method (which can happen during master changeor zookeeper reconnect) the operation can either catch and handle or rethrow it. Rethrowing it will lead to complete reexecution of the operation.

  public void testPublishMaster() throws Exception {
    Master master1 = mock(Master.class);
    Master master2 = mock(Master.class);
    when(master1.getMasterName()).thenReturn("master1");
    when(master2.getMasterName()).thenReturn("master2");
    MasterOperation operation = mock(MasterOperation.class);
    _protocol.addMasterOperation(operation);


    MasterQueue queue = _protocol.publishMaster(master1);
    assertNotNull(queue);
    assertNotNull(_protocol.getMasterMD());

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  }


  @Test(timeout = 15000)
  public void testWatchDogMechanism() throws Exception {
    final MasterQueue queue = new MasterQueue(_zk.getZkClient(), getRootPath());
    MasterOperation masterOperation = mock(MasterOperation.class);
    queue.add(masterOperation);


    List<OperationId> operationIds = new ArrayList<OperationId>();
    operationIds.add(new OperationId("node1", "e1"));

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  @Test(timeout = 15000)
  public void testKeepStateBetweenExecutionAndCompletion() throws Exception {
    final MasterQueue queue = new MasterQueue(_zk.getZkClient(), getRootPath());


    MasterOperation masterOperation = new StatefulMasterOperation();
    queue.add(masterOperation);


    masterOperation = queue.peek();
    masterOperation.execute(mock(MasterContext.class), Collections.EMPTY_LIST);


    queue.moveOperationToWatching(masterOperation, Collections.EMPTY_LIST);
    assertEquals(1, queue.getWatchdogs().size());
    masterOperation = queue.getWatchdogs().get(0).getOperation();
    masterOperation.nodeOperationsComplete(mock(MasterContext.class), Collections.EMPTY_LIST);
  }

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  @Test(timeout = 15000)
  public void testWatchDogCleanup() throws Exception {
    ZkClient zkClientSpy = spy(_zk.getZkClient());
    MasterQueue queue = new MasterQueue(zkClientSpy, getRootPath());
    MasterOperation masterOperation = mock(MasterOperation.class);
    String elementName = queue.add(masterOperation);


    List<OperationId> operationIds = new ArrayList<OperationId>();
    operationIds.add(new OperationId("node1", "e1"));

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    Master master = new Master(_zk.getInteractionProtocol(), false);
    Node node = Mocks.mockNode();// leave safe mode
    _protocol.publishNode(node, new NodeMetaData("node1"));
    master.start();


    MasterOperation operation1 = mock(MasterOperation.class, withSettings().serializable());
    MasterOperation operation2 = mock(MasterOperation.class, withSettings().serializable());


    SerializableCountDownLatchAnswer answer = new SerializableCountDownLatchAnswer(2);
    when(operation1.getExecutionInstruction((List<MasterOperation>) notNull()))
            .thenReturn(ExecutionInstruction.EXECUTE);
    when(operation2.getExecutionInstruction((List<MasterOperation>) notNull()))
            .thenReturn(ExecutionInstruction.EXECUTE);
    when(operation1.execute((MasterContext) notNull(), (List<MasterOperation>) notNull())).thenAnswer(answer);
    when(operation2.execute((MasterContext) notNull(), (List<MasterOperation>) notNull())).thenAnswer(answer);
    _protocol.addMasterOperation(operation1);
    _protocol.addMasterOperation(operation2);
    answer.getCountDownLatch().await();


    master.shutdown();

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  protected final MasterContext _context = new MasterContext(_protocol, Mocks.mockMaster(),
          new DefaultDistributionPolicy(), _queue);


  @Test(timeout = 10000)
  public void testSafeMode() throws Exception {
    final MasterOperation operation = mockOperation(ExecutionInstruction.EXECUTE);
    when(_queue.peek()).thenReturn(operation).thenAnswer(new SleepingAnswer());
    when(_protocol.getLiveNodes()).thenReturn(EMPTY_LIST);


    long safeModeMaxTime = 200;
    OperatorThread operatorThread = new OperatorThread(_context, safeModeMaxTime);

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    operatorThread.join();
  }


  @Test(timeout = 10000)
  public void testOperationExecution() throws Exception {
    final MasterOperation masterOperation1 = mockOperation(ExecutionInstruction.EXECUTE);
    final MasterOperation masterOperation2 = mockOperation(ExecutionInstruction.EXECUTE);
    final MasterOperation masterOperation3 = mockOperation(ExecutionInstruction.EXECUTE);
    when(_queue.peek()).thenReturn(masterOperation1).thenReturn(masterOperation2).thenReturn(masterOperation3)
            .thenAnswer(new SleepingAnswer());


    when(_protocol.getLiveNodes()).thenReturn(Arrays.asList("node1"));
    long safeModeMaxTime = 200;

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    String nodeName = "node1";
    when(_protocol.getLiveNodes()).thenReturn(Arrays.asList(nodeName));
    List<OperationId> operationIds = new ArrayList<OperationId>();
    operationIds.add(new OperationId(nodeName, "e1"));


    final MasterOperation leaderOperation = mock(MasterOperation.class);
    when(leaderOperation.execute(_context, EMPTY_LIST)).thenReturn(operationIds);
    setupExecutionInstruction(leaderOperation, ExecutionInstruction.EXECUTE);
    when(_queue.peek()).thenReturn(leaderOperation).thenAnswer(new SleepingAnswer());


    when(_protocol.isNodeOperationQueued(operationIds.get(0))).thenReturn(false);
    OperationWatchdog watchdog = mock(OperationWatchdog.class);

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    }, TimeUnit.SECONDS, 30);
  }


  @Test(timeout = 10000)
  public void testOperationLocks_CancelLockedOperation() throws Exception {
    final MasterOperation leaderOperation1 = mock(MasterOperation.class);
    final MasterOperation leaderOperation2 = mock(MasterOperation.class);
    ExecutionInstruction lockInstruction = MasterOperation.ExecutionInstruction.CANCEL;


    runLockSituation(leaderOperation1, leaderOperation2, lockInstruction);
    verify(leaderOperation2, times(0)).execute(_context, EMPTY_LIST);
  }

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    verify(leaderOperation2, times(0)).execute(_context, EMPTY_LIST);
  }


  @Test(timeout = 10000)
  public void testOperationLocks_SuspendLockedTask() throws Exception {
    final MasterOperation leaderOperation1 = mock(MasterOperation.class);
    final MasterOperation leaderOperation2 = mock(MasterOperation.class);


    ExecutionInstruction lockInstruction = MasterOperation.ExecutionInstruction.ADD_TO_QUEUE_TAIL;
    runLockSituation(leaderOperation1, leaderOperation2, lockInstruction);
    verify(leaderOperation2, times(0)).execute(_context, EMPTY_LIST);
    verify(_queue, times(1)).add(leaderOperation2);

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Related Classes of net.sf.katta.operation.master.MasterOperation

net.sf.katta.master.MasterZkTest

net.sf.katta.master.OperatorThread

net.sf.katta.master.OperatorThreadTest

net.sf.katta.protocol.InteractionProtocolTest

net.sf.katta.protocol.MasterQueueTest

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