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

  /* (non-Javadoc)
   * @see org.springframework.beans.factory.FactoryBean#getObject()
   */
  @Override
  public SimpleFlow getObject() throws Exception {
    SimpleFlow flow = flowType.getConstructor(String.class).newInstance(name);


    flow.setStateTransitionComparator(stateTransitionComparator);


    List<StateTransition> updatedTransitions = new ArrayList<StateTransition>();
    for (StateTransition stateTransition : stateTransitions) {
      State state = getProxyState(stateTransition.getState());
      updatedTransitions.add(StateTransition.switchOriginAndDestination(stateTransition, state,
          getNext(stateTransition.getNext())));
    }


    flow.setStateTransitions(updatedTransitions);
    flow.afterPropertiesSet();
    return flow;


  }

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  }


  @Test
  public void testDecisionFlowWithExceptionInDecider() throws Throwable {


    SimpleFlow flow = new JsrFlow("job");
    JobExecutionDecider decider = new JobExecutionDecider() {
      @Override
      public FlowExecutionStatus decide(JobExecution jobExecution, StepExecution stepExecution) {
        assertNotNull(stepExecution);
        throw new RuntimeException("Foo");
      }
    };


    List<StateTransition> transitions = new ArrayList<StateTransition>();
    transitions.add(StateTransition.createStateTransition(new StepState(new StubStep("step1")), "decision"));
    DecisionState decision = new DecisionState(decider, "decision");
    transitions.add(StateTransition.createStateTransition(decision, "step2"));
    transitions.add(StateTransition.createStateTransition(decision, "SWITCH", "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);
    try {
      job.execute(jobExecution);
    }

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    }
  }


  @Test
  public void testGetStepExists() throws Exception {
    SimpleFlow flow = new JsrFlow("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();


    Step step = job.getStep("step2");
    assertNotNull(step);

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    assertEquals("step2", step.getName());
  }


  @Test
  public void testGetStepExistsWithPrefix() throws Exception {
    SimpleFlow flow = new JsrFlow("job");
    List<StateTransition> transitions = new ArrayList<StateTransition>();
    transitions.add(StateTransition.createStateTransition(new StepState("job.step", new StubStep("step")), "end0"));
    transitions.add(StateTransition.createEndStateTransition(new EndState(FlowExecutionStatus.COMPLETED, "end0")));
    flow.setStateTransitions(transitions);
    flow.afterPropertiesSet();
    job.setFlow(flow);
    job.setName(flow.getName());
    job.afterPropertiesSet();


    Step step = job.getStep("step");
    assertNotNull(step);
    assertEquals("step", step.getName());

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    assertEquals("step", step.getName());
  }


  @Test
  public void testGetStepNamesWithPrefix() throws Exception {
    SimpleFlow flow = new JsrFlow("job");
    List<StateTransition> transitions = new ArrayList<StateTransition>();
    transitions.add(StateTransition.createStateTransition(new StepState("job.step", new StubStep("step")), "end0"));
    transitions.add(StateTransition.createEndStateTransition(new EndState(FlowExecutionStatus.COMPLETED, "end0")));
    flow.setStateTransitions(transitions);
    flow.afterPropertiesSet();
    job.setFlow(flow);
    job.setName(flow.getName());
    job.afterPropertiesSet();


    assertEquals("[step]", job.getStepNames().toString());
  }

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    assertEquals("[step]", job.getStepNames().toString());
  }


  @Test
  public void testGetStepNotExists() throws Exception {
    SimpleFlow flow = new JsrFlow("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();


    Step step = job.getStep("foo");
    assertNull(step);

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    assertNull(step);
  }


  @Test
  public void testGetStepNotStepState() throws Exception {
    SimpleFlow flow = new JsrFlow("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();


    Step step = job.getStep("end0");
    assertNull(step);

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    assertNull(step);
  }


  @Test
  public void testGetStepNestedFlow() throws Exception {
    SimpleFlow nested = new JsrFlow("nested");
    List<StateTransition> transitions = new ArrayList<StateTransition>();
    transitions.add(StateTransition.createStateTransition(new StepState(new StubStep("step2")), "end1"));
    transitions.add(StateTransition.createEndStateTransition(new EndState(FlowExecutionStatus.COMPLETED, "end1")));
    nested.setStateTransitions(transitions);
    nested.afterPropertiesSet();


    SimpleFlow flow = new JsrFlow("job");
    transitions = new ArrayList<StateTransition>();
    transitions.add(StateTransition.createStateTransition(new StepState(new StubStep("step1")), "nested"));
    transitions.add(StateTransition.createStateTransition(new FlowState(nested, "nested"), "end0"));
    transitions.add(StateTransition.createEndStateTransition(new EndState(FlowExecutionStatus.COMPLETED, "end0")));
    flow.setStateTransitions(transitions);
    flow.afterPropertiesSet();
    job.setFlow(flow);
    job.afterPropertiesSet();


    List<String> names = new ArrayList<String>(job.getStepNames());
    Collections.sort(names);

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    assertEquals("[step1, step2]", names.toString());
  }


  @Test
  public void testGetStepSplitFlow() throws Exception {
    SimpleFlow flow = new JsrFlow("job");
    SimpleFlow flow1 = new JsrFlow("flow1");
    SimpleFlow flow2 = new JsrFlow("flow2");


    List<StateTransition> transitions = new ArrayList<StateTransition>();
    transitions.add(StateTransition.createStateTransition(new StepState(new StubStep("step1")), "end0"));
    transitions.add(StateTransition.createEndStateTransition(new EndState(FlowExecutionStatus.COMPLETED, "end0")));
    flow1.setStateTransitions(new ArrayList<StateTransition>(transitions));
    flow1.afterPropertiesSet();
    transitions = new ArrayList<StateTransition>();
    transitions.add(StateTransition.createStateTransition(new StepState(new StubStep("step2")), "end1"));
    transitions.add(StateTransition.createEndStateTransition(new EndState(FlowExecutionStatus.COMPLETED, "end1")));
    flow2.setStateTransitions(new ArrayList<StateTransition>(transitions));
    flow2.afterPropertiesSet();


    transitions = new ArrayList<StateTransition>();
    transitions.add(StateTransition.createStateTransition(new SplitState(Arrays.<Flow> asList(flow1, flow2),
        "split"), "end2"));
    transitions.add(StateTransition.createEndStateTransition(new EndState(FlowExecutionStatus.COMPLETED, "end2")));

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    job.setJobExplorer(jobExplorer);
  }


  @Test
  public void testGetSteps() throws Exception {
    SimpleFlow flow = new JsrFlow("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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