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


  @Test
  public void testReadError() throws Exception{
    reader.failCount = 10;


    Step step = builder.chunk(25).reader(reader).processor(processor).writer(writer).listener((ItemReadListener<String>) readListener).build();


    runStep(step);


    assertEquals(BatchStatus.FAILED, stepExecution.getStatus());
    assertEquals(9, processor.count);

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    writer.setFailures("4", "5");


    factory.setSkipLimit(4);
    factory.setCommitInterval(3); // includes all expected skips


    Step step = factory.getObject();


    step.execute(stepExecution);
    assertEquals(4, stepExecution.getSkipCount());
    assertEquals(2, stepExecution.getReadSkipCount());
    assertEquals(2, stepExecution.getWriteSkipCount());


    // skipped 2,3,4,5
    List<String> expectedOutput = Arrays.asList(StringUtils.commaDelimitedListToStringArray("1,6,7"));
    assertEquals(expectedOutput, writer.getCommitted());
    assertStepExecutionsAreEqual(stepExecution, repository.getLastStepExecution(jobExecution.getJobInstance(), step
        .getName()));
  }

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  @Test
  public void testProcessError() throws Exception{
    processor.failCount = 10;


    Step step = builder.chunk(25).reader(reader).processor(processor).writer(writer).listener((ItemReadListener<String>) readListener).build();


    runStep(step);


    assertEquals(BatchStatus.FAILED, stepExecution.getStatus());
    assertEquals(10, processor.count);

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  @Test
  public void testWriteError() throws Exception{
    writer.fail = true;


    Step step = builder.chunk(25).reader(reader).processor(processor).writer(writer).listener((ItemReadListener<String>) readListener).build();


    runStep(step);


    assertEquals(BatchStatus.FAILED, stepExecution.getStatus());
    assertEquals(25, processor.count);

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  }


  @Test
  public void testMultipleChunks() throws Exception{


    Step step = builder.chunk(10).reader(reader).processor(processor).writer(writer).listener((ItemReadListener<String>) readListener).build();


    runStep(step);


    assertEquals(BatchStatus.COMPLETED, stepExecution.getStatus());
    assertEquals(25, processor.count);

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    reader.setFailures("b");


    factory.setSkippableExceptionClasses(getExceptionMap(Exception.class));
    factory.setSkipLimit(1);


    Step step = factory.getObject();


    step.execute(stepExecution);


    assertEquals(1, stepExecution.getSkipCount());
    assertEquals("[a, c]", reader.getRead().toString());
    assertStepExecutionsAreEqual(stepExecution, repository.getLastStepExecution(jobExecution.getJobInstance(), step
        .getName()));
  }

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    factory.setCommitInterval(5);
    factory.setSkipLimit(3);
    factory.setSkippableExceptionClasses(getExceptionMap(Exception.class));


    Step step = factory.getObject();


    step.execute(stepExecution);
    assertEquals(BatchStatus.FAILED, stepExecution.getStatus());
    assertEquals("bad skip count", 3, stepExecution.getSkipCount());
    assertEquals("bad read skip count", 2, stepExecution.getReadSkipCount());
    assertEquals("bad write skip count", 1, stepExecution.getWriteSkipCount());


    // writer did not skip "6" as it never made it to writer, only "4" did
    assertFalse(reader.getRead().contains("6"));
    assertTrue(reader.getRead().contains("4"));


    // only "1" was ever committed
    List<String> expectedOutput = Arrays.asList(StringUtils.commaDelimitedListToStringArray("1,2,3,5,7,8,9,10,11"));
    assertEquals(expectedOutput, writer.getCommitted());
    assertStepExecutionsAreEqual(stepExecution, repository.getLastStepExecution(jobExecution.getJobInstance(), step
        .getName()));
  }

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  public void testReprocessingAfterWriterRollback() throws Exception {
    reader.setItems("1", "2", "3", "4");


    writer.setFailures("4");


    Step step = factory.getObject();
    step.execute(stepExecution);


    assertEquals(1, stepExecution.getSkipCount());
    assertEquals(2, stepExecution.getRollbackCount());


    // 1,2,3,4,3,4 - one scan until the item is
    // identified and finally skipped on the second attempt
    assertEquals("[1, 2, 3, 4, 3, 4]", processor.getProcessed().toString());
    assertStepExecutionsAreEqual(stepExecution, repository.getLastStepExecution(jobExecution.getJobInstance(), step
        .getName()));
  }

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      }
    }


    factory.setItemWriter(new TestItemListenerWriter());


    Step step = factory.getObject();
    step.execute(stepExecution);


    assertEquals(BatchStatus.COMPLETED, stepExecution.getStatus());
    for (int i = 1; i <= 6; i++) {
      assertTrue("didn't call listener " + i, listenerCalls.contains(i));
    }

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    };


    factory.setItemReader(reader);
    factory.setTaskExecutor(new ConcurrentTaskExecutor());


    Step step = factory.getObject();


    step.execute(stepExecution);


    assertTrue(opened);
    assertTrue(closed);
    assertEquals(BatchStatus.COMPLETED, stepExecution.getStatus());
  }

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