Examples of org.springframework.batch.core.Step

org.springframework.batch.core.Step
Batch domain interface representing the configuration of a step. As with the {@link Job}, a {@link Step} is meant toexplicitly represent the configuration of a step by a developer, but also the ability to execute the step. @author Dave Syer

    reader.setFailures("2");
    writer.setFailures("4");


    factory.setSkipLimit(1);


    Step step = factory.getObject();


    step.execute(stepExecution);


    assertEquals(1, stepExecution.getSkipCount());


    // writer did not skip "2" as it never made it to writer, only "4" did
    assertTrue(reader.getRead().contains("4"));
    assertFalse(writer.getCommitted().contains("4"));


    // failure on "4" tripped the skip limit so we never got to "5"
    List<String> expectedOutput = Arrays.asList(StringUtils.commaDelimitedListToStringArray("1,3"));
    assertEquals(expectedOutput, writer.getCommitted());
    assertStepExecutionsAreEqual(stepExecution, repository.getLastStepExecution(jobExecution.getJobInstance(), step
        .getName()));
  }

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    writer.setFailures("4");


    factory.setSkipLimit(3);
    factory.setSkippableExceptionClasses(getExceptionMap(Exception.class));


    Step step = factory.getObject();


    step.execute(stepExecution);
    assertEquals(BatchStatus.FAILED, stepExecution.getStatus());


    assertEquals(3, stepExecution.getSkipCount());
    assertEquals(2, stepExecution.getReadSkipCount());
    assertEquals(1, stepExecution.getWriteSkipCount());
    assertEquals(2, stepExecution.getReadCount());


    // writer did not skip "2" as it never made it to writer, only "4" did
    assertFalse(reader.getRead().contains("2"));
    assertTrue(reader.getRead().contains("4"));


    // only "1" was ever committed
    List<String> expectedOutput = Arrays.asList(StringUtils.commaDelimitedListToStringArray("1"));
    assertEquals(expectedOutput, writer.getCommitted());
    assertStepExecutionsAreEqual(stepExecution, repository.getLastStepExecution(jobExecution.getJobInstance(), step
        .getName()));
  }

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      }
    } });
    factory.setCommitInterval(2);
    factory.setSkipLimit(2);


    Step step = factory.getObject();


    step.execute(stepExecution);


    // 1,3 skipped inside a committed chunk. 5 tripped the skip
    // limit but it was skipped in a chunk that rolled back, so
    // it will re-appear on a restart and the listener is not called.
    assertEquals(2, listenerCalls.size());

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        throw new RuntimeException("oops");
      }
    } });
    factory.setSkippableExceptionClasses(getExceptionMap(Exception.class));


    Step step = factory.getObject();


    step.execute(stepExecution);
    assertEquals(BatchStatus.FAILED, stepExecution.getStatus());
    assertEquals("oops", stepExecution.getFailureExceptions().get(0).getCause().getMessage());


    // listeners are called only once chunk is about to commit, so
    // listener failure does not affect other statistics
    assertEquals(2, stepExecution.getReadSkipCount());
    // but we didn't get as far as the write skip in the scan:
    assertEquals(0, stepExecution.getWriteSkipCount());
    assertEquals(2, stepExecution.getSkipCount());
    assertStepExecutionsAreEqual(stepExecution, repository.getLastStepExecution(jobExecution.getJobInstance(), step
        .getName()));
  }

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        throw new RuntimeException("oops");
      }
    } });
    factory.setSkippableExceptionClasses(getExceptionMap(Exception.class));


    Step step = factory.getObject();


    step.execute(stepExecution);
    assertEquals(BatchStatus.FAILED, stepExecution.getStatus());
    assertEquals("oops", stepExecution.getFailureExceptions().get(0).getCause().getMessage());
    assertEquals(1, stepExecution.getSkipCount());
    assertEquals(0, stepExecution.getReadSkipCount());
    assertEquals(1, stepExecution.getWriteSkipCount());
    assertStepExecutionsAreEqual(stepExecution, repository.getLastStepExecution(jobExecution.getJobInstance(), step
        .getName()));
  }

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  }


  @Test
  public void testNoInputNoListeners() throws Exception{
    reader = new FailingListItemReader(new ArrayList<String>());
    Step step = builder.chunk(25).reader(reader).processor(processor).writer(writer).listener((ItemReadListener<String>) readListener).build();


    runStep(step);


    assertEquals(BatchStatus.COMPLETED, stepExecution.getStatus());
    assertEquals(0, processor.count);

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    writer.setFailures("4");


    factory.setSkipLimit(4);


    Step step = factory.getObject();


    step.execute(stepExecution);
    assertEquals(4, stepExecution.getSkipCount());
    assertEquals(3, stepExecution.getReadSkipCount());
    assertEquals(1, stepExecution.getWriteSkipCount());


    // skipped 2,3,4,5
    List<String> expectedOutput = Arrays.asList(StringUtils.commaDelimitedListToStringArray("1,6"));
    assertEquals(expectedOutput, writer.getCommitted());


    // reader exceptions should not cause rollback, 1 writer exception
    // causes 2 rollbacks
    assertEquals(2, stepExecution.getRollbackCount());
    assertStepExecutionsAreEqual(stepExecution, repository.getLastStepExecution(jobExecution.getJobInstance(), step
        .getName()));
  }

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    assertEquals(0, stepExecution.getWriteSkipCount());
  }


  @Test
  public void testSimpleScenarioNoListeners() throws Exception{
    Step step = builder.chunk(25).reader(reader).processor(processor).writer(writer).build();


    runStep(step);


    assertEquals(BatchStatus.COMPLETED, stepExecution.getStatus());
    assertEquals(0, stepExecution.getProcessSkipCount());

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    }
  }


  @Test
  public void testSimpleScenarioNoProcessor() throws Exception{
    Step step = builder.chunk(25).reader(reader).writer(writer).listener((ItemReadListener<String>) readListener).build();


    runStep(step);


    assertEquals(BatchStatus.COMPLETED, stepExecution.getStatus());
    assertEquals(0, stepExecution.getProcessSkipCount());

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  }


  @Test
  public void testProcessorFilteringNoListeners() throws Exception{
    processor.filter = true;
    Step step = builder.chunk(25).reader(reader).processor(processor).writer(writer).listener((ItemReadListener<String>) readListener).build();


    runStep(step);


    int count = 0;
    for (String curItem : writer.results) {

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