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.

  }


  @Test(timeout = 10000)
  public void testInterruptedException_Operation() throws Exception {
    when(_protocol.getLiveNodes()).thenReturn(Arrays.asList("node1"));
    final MasterOperation masterOperation = mockOperation(ExecutionInstruction.EXECUTE);
    when(masterOperation.execute(_context, EMPTY_LIST)).thenThrow(new InterruptedException());
    when(_queue.peek()).thenReturn(masterOperation);
    OperatorThread operatorThread = new OperatorThread(_context, 50);
    operatorThread.start();
    operatorThread.join();
  }

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  @Test(timeout = 1000000)
  public void testInterruptedException_Operation_Zk() throws Exception {
    when(_protocol.getLiveNodes()).thenReturn(Arrays.asList("node1"));
    ZkInterruptedException zkInterruptedException = mock(ZkInterruptedException.class);
    final MasterOperation masterOperation = mockOperation(ExecutionInstruction.EXECUTE);
    when(masterOperation.execute(_context, EMPTY_LIST)).thenThrow(zkInterruptedException);
    when(_queue.peek()).thenReturn(masterOperation);
    OperatorThread operatorThread = new OperatorThread(_context, 50);
    operatorThread.start();
    operatorThread.join();
  }

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    operatorThread.interrupt();
    operatorThread.join();
  }


  private MasterOperation mockOperation(ExecutionInstruction instruction) throws Exception {
    MasterOperation masterOperation = mock(MasterOperation.class);
    when(masterOperation.getExecutionInstruction((List<MasterOperation>) notNull())).thenReturn(instruction);
    return masterOperation;
  }

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      while (true) {
        try {
          // TODO jz: poll only for a certain amount of time and then execute a
          // global check operation ?
          MasterOperation operation = _queue.peek();
          List<OperationId> nodeOperationIds = null;
          try {
            List<MasterOperation> runningOperations = _registry.getRunningOperations();
            ExecutionInstruction instruction = operation.getExecutionInstruction(runningOperations);
            nodeOperationIds = executeOperation(operation, instruction, runningOperations);
          } catch (Exception e) {
            ExceptionUtil.rethrowInterruptedException(e);
            LOG.error("failed to execute " + operation, e);
          }

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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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