Examples of org.springframework.batch.core.job.flow.support.SimpleFlow

Package org.springframework.batch.core.job.flow.support

Examples of org.springframework.batch.core.job.flow.support.SimpleFlow

org.springframework.batch.core.job.flow.support.SimpleFlow
A {@link Flow} that branches conditionally depending on the exit status ofthe last {@link State}. The input parameters are the state transitions (in no particular order). The start state name can be specified explicitly (and must exist in the set of transitions), or computed from the existing transitions, if unambiguous. @author Dave Syer @author Michael Minella @since 2.0

    assertEquals(1, jobExecution.getStepExecutions().size());
    assertEquals(BatchStatus.STOPPED, jobExecution.getStatus());
  }


  public void testEndStateFailed() throws Exception {
    SimpleFlow flow = new JsrFlow("job");
    List<StateTransition> transitions = new ArrayList<StateTransition>();
    transitions.add(StateTransition.createStateTransition(new StepState(new StubStep("step1")), "end"));
    transitions
    .add(StateTransition.createStateTransition(new EndState(FlowExecutionStatus.FAILED, "end"), "step2"));
    transitions.add(StateTransition.createStateTransition(new StepState(new StubStep("step2")), ExitStatus.FAILED
        .getExitCode(), "end0"));
    transitions.add(StateTransition.createStateTransition(new StepState(new StubStep("step2")),
        ExitStatus.COMPLETED.getExitCode(), "end1"));
    transitions.add(StateTransition.createEndStateTransition(new EndState(FlowExecutionStatus.FAILED, "end0")));
    transitions.add(StateTransition.createEndStateTransition(new EndState(FlowExecutionStatus.COMPLETED, "end1")));
    flow.setStateTransitions(transitions);
    job.setFlow(flow);
    job.afterPropertiesSet();
    job.doExecute(jobExecution);
    assertEquals(BatchStatus.FAILED, jobExecution.getStatus());
    assertEquals(1, jobExecution.getStepExecutions().size());

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    assertEquals(1, jobExecution.getStepExecutions().size());
  }


  @Test
  public void testEndStateStoppedWithRestart() throws Exception {
    SimpleFlow flow = new JsrFlow("job");
    List<StateTransition> transitions = new ArrayList<StateTransition>();
    transitions.add(StateTransition.createStateTransition(new StepState(new StubStep("step1")), "end"));
    transitions.add(StateTransition
        .createStateTransition(new EndState(FlowExecutionStatus.STOPPED, "end"), "step2"));
    StepState step2 = new StepState(new StubStep("step2"));
    transitions.add(StateTransition.createStateTransition(step2, ExitStatus.COMPLETED.getExitCode(), "end0"));
    transitions.add(StateTransition.createStateTransition(step2, ExitStatus.FAILED.getExitCode(), "end1"));
    transitions.add(StateTransition.createEndStateTransition(new EndState(FlowExecutionStatus.COMPLETED, "end0")));
    transitions.add(StateTransition.createEndStateTransition(new EndState(FlowExecutionStatus.FAILED, "end1")));
    flow.setStateTransitions(transitions);
    job.setFlow(flow);
    job.afterPropertiesSet();


    // To test a restart we have to use the AbstractJob.execute()...
    job.execute(jobExecution);

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  }


  @Test
  public void testBranching() throws Exception {
    SimpleFlow flow = new JsrFlow("job");
    List<StateTransition> transitions = new ArrayList<StateTransition>();
    StepState step1 = new StepState(new StubStep("step1"));
    transitions.add(StateTransition.createStateTransition(step1, "step2"));
    transitions.add(StateTransition.createStateTransition(step1, "COMPLETED", "step3"));
    StepState step2 = new StepState(new StubStep("step2"));
    transitions.add(StateTransition.createStateTransition(step2, ExitStatus.COMPLETED.getExitCode(), "end0"));
    transitions.add(StateTransition.createStateTransition(step2, ExitStatus.FAILED.getExitCode(), "end1"));
    transitions.add(StateTransition.createEndStateTransition(new EndState(FlowExecutionStatus.COMPLETED, "end0")));
    transitions.add(StateTransition.createEndStateTransition(new EndState(FlowExecutionStatus.FAILED, "end1")));
    StepState step3 = new StepState(new StubStep("step3"));
    transitions.add(StateTransition.createStateTransition(step3, ExitStatus.FAILED.getExitCode(), "end2"));
    transitions.add(StateTransition.createStateTransition(step3, ExitStatus.COMPLETED.getExitCode(), "end3"));
    transitions.add(StateTransition.createEndStateTransition(new EndState(FlowExecutionStatus.FAILED, "end2")));
    transitions.add(StateTransition.createEndStateTransition(new EndState(FlowExecutionStatus.COMPLETED, "end3")));
    flow.setStateTransitions(transitions);
    job.setFlow(flow);
    job.afterPropertiesSet();
    job.doExecute(jobExecution);
    StepExecution stepExecution = getStepExecution(jobExecution, "step2");
    assertEquals(ExitStatus.COMPLETED, stepExecution.getExitStatus());

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    assertEquals(2, jobExecution.getStepExecutions().size());
  }


  @Test
  public void testBasicFlow() throws Throwable {
    SimpleFlow flow = new JsrFlow("job");
    List<StateTransition> transitions = new ArrayList<StateTransition>();
    transitions.add(StateTransition.createStateTransition(new StepState(new StubStep("step")), "end0"));
    transitions.add(StateTransition.createEndStateTransition(new EndState(FlowExecutionStatus.COMPLETED, "end0")));
    flow.setStateTransitions(transitions);
    job.setFlow(flow);
    job.execute(jobExecution);
    if (!jobExecution.getAllFailureExceptions().isEmpty()) {
      throw jobExecution.getAllFailureExceptions().get(0);
    }

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  }


  @Test
  public void testDecisionFlow() throws Throwable {


    SimpleFlow flow = new JsrFlow("job");
    Decider decider = new Decider() {


      @Override
      public String decide(javax.batch.runtime.StepExecution[] executions)
          throws Exception {
        assertNotNull(executions);
        return "SWITCH";
      }
    };


    List<StateTransition> transitions = new ArrayList<StateTransition>();
    transitions.add(StateTransition.createStateTransition(new StepState(new StubStep("step1")), "decision"));
    StepState decision = new StepState(new StubDecisionStep("decision", decider));
    transitions.add(StateTransition.createStateTransition(decision, "SWITCH", "step3"));
    transitions.add(StateTransition.createStateTransition(decision, "step2"));
    StepState step2 = new StepState(new StubStep("step2"));
    transitions.add(StateTransition.createStateTransition(step2, ExitStatus.COMPLETED.getExitCode(), "end0"));
    transitions.add(StateTransition.createStateTransition(step2, ExitStatus.FAILED.getExitCode(), "end1"));
    transitions.add(StateTransition.createEndStateTransition(new EndState(FlowExecutionStatus.COMPLETED, "end0")));
    transitions.add(StateTransition.createEndStateTransition(new EndState(FlowExecutionStatus.FAILED, "end1")));
    StepState step3 = new StepState(new StubStep("step3"));
    transitions.add(StateTransition.createStateTransition(step3, ExitStatus.FAILED.getExitCode(), "end2"));
    transitions.add(StateTransition.createStateTransition(step3, ExitStatus.COMPLETED.getExitCode(), "end3"));
    transitions.add(StateTransition.createEndStateTransition(new EndState(FlowExecutionStatus.FAILED, "end2")));
    transitions.add(StateTransition.createEndStateTransition(new EndState(FlowExecutionStatus.COMPLETED, "end3")));
    flow.setStateTransitions(transitions);


    job.setFlow(flow);
    job.doExecute(jobExecution);


    StepExecution stepExecution = getStepExecution(jobExecution, "step3");

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    fb.setJobRepository(new JobRepositorySupport());
    fb.setStartLimit(5);
    fb.setListeners(new StepListener[] { new StepExecutionListenerSupport() });
    fb.setTaskExecutor(new SyncTaskExecutor());


    fb.setFlow(new SimpleFlow("foo"));


    Object step = fb.getObject();
    assertTrue(step instanceof FlowStep);
    Object handler = ReflectionTestUtils.getField(step, "flow");
    assertTrue(handler instanceof SimpleFlow);

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      return new DummyStep();
    }


    @Bean
    public SimpleFlow simpleFlow() {
      SimpleFlow simpleFlow = new SimpleFlow("simpleFlow");
      List<StateTransition> transitions = new ArrayList<StateTransition>();
      transitions.add(StateTransition.createStateTransition(new StepState(dummyStep()), "end0"));
      transitions.add(StateTransition.createEndStateTransition(new EndState(FlowExecutionStatus.COMPLETED, "end0")));
      simpleFlow.setStateTransitions(transitions);
      return simpleFlow;
    }

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  protected Flow flow() {
    if (!dirty) {
      // optimization in case this method is called consecutively
      return flow;
    }
    flow = new SimpleFlow(name);
    // optimization for flows that only have one state that itself is a flow:
    if (currentState instanceof FlowState && states.size() == 1) {
      return ((FlowState) currentState).getFlows().iterator().next();
    }
    addDanglingEndStates();

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    jobExecution = jobRepository.createJobExecution("job", new JobParameters());
  }


  @Test
  public void testGetSteps() throws Exception {
    SimpleFlow flow = new SimpleFlow("job");
    List<StateTransition> transitions = new ArrayList<StateTransition>();
    transitions.add(StateTransition.createStateTransition(new StepState(new StubStep("step1")), "step2"));
    transitions.add(StateTransition.createStateTransition(new StepState(new StubStep("step2")), "end0"));
    transitions.add(StateTransition.createEndStateTransition(new EndState(FlowExecutionStatus.COMPLETED, "end0")));
    flow.setStateTransitions(transitions);
    flow.afterPropertiesSet();
    job.setFlow(flow);
    job.afterPropertiesSet();
    assertEquals(2, job.getStepNames().size());
  }

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    assertEquals(2, job.getStepNames().size());
  }


  @Test
  public void testTwoSteps() throws Exception {
    SimpleFlow flow = new SimpleFlow("job");
    List<StateTransition> transitions = new ArrayList<StateTransition>();
    transitions.add(StateTransition.createStateTransition(new StepState(new StubStep("step1")), "step2"));
    StepState step2 = new StepState(new StubStep("step2"));
    transitions.add(StateTransition.createStateTransition(step2, ExitStatus.FAILED.getExitCode(), "end0"));
    transitions.add(StateTransition.createStateTransition(step2, ExitStatus.COMPLETED.getExitCode(), "end1"));
    transitions.add(StateTransition.createEndStateTransition(new EndState(FlowExecutionStatus.FAILED, "end0")));
    transitions.add(StateTransition.createEndStateTransition(new EndState(FlowExecutionStatus.COMPLETED, "end1")));
    flow.setStateTransitions(transitions);
    job.setFlow(flow);
    job.afterPropertiesSet();
    job.doExecute(jobExecution);
    StepExecution stepExecution = getStepExecution(jobExecution, "step2");
    assertEquals(ExitStatus.COMPLETED, stepExecution.getExitStatus());

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