Example usage for org.springframework.batch.item.support AbstractItemCountingItemStreamItemReader read

Introduction

In this page you can find the example usage for org.springframework.batch.item.support AbstractItemCountingItemStreamItemReader read.

Prototype

@Override
    public T read() throws Exception, UnexpectedInputException, ParseException 

Source Link

Usage

From source file:org.springframework.batch.core.step.item.FaultTolerantStepFactoryBeanRetryTests.java

@Test
public void testRestartAfterFailedWrite() throws Exception {

    factory.setSkipLimit(0);/*from   ww w.java 2  s  .  c om*/
    factory.setCommitInterval(3);
    AbstractItemCountingItemStreamItemReader<String> reader = new AbstractItemCountingItemStreamItemReader<String>() {

        private ItemReader<String> reader;

        @Override
        protected void doClose() throws Exception {
            reader = null;
        }

        @Override
        protected void doOpen() throws Exception {
            reader = new ListItemReader<String>(Arrays.asList("a", "b", "c", "d", "e", "f"));
        }

        @Override
        protected String doRead() throws Exception {
            return reader.read();
        }

    };
    // Need to set name or else reader will fail to open
    reader.setName("foo");
    factory.setItemReader(reader);
    factory.setStreams(new ItemStream[] { reader });
    factory.setItemWriter(new ItemWriter<String>() {
        @Override
        public void write(List<? extends String> items) throws Exception {
            if (fail && items.contains("e")) {
                throw new RuntimeException("Planned failure");
            }
            processed.addAll(items);
        }
    });
    factory.setRetryLimit(0);
    Step step = factory.getObject();

    fail = true;
    StepExecution stepExecution = new StepExecution(step.getName(), jobExecution);
    repository.add(stepExecution);
    step.execute(stepExecution);

    assertEquals(BatchStatus.FAILED, stepExecution.getStatus());
    assertEquals(4, stepExecution.getWriteCount());
    assertEquals(6, stepExecution.getReadCount());

    fail = false;
    ExecutionContext executionContext = stepExecution.getExecutionContext();
    stepExecution = new StepExecution(step.getName(), jobExecution);
    stepExecution.setExecutionContext(executionContext);
    repository.add(stepExecution);
    step.execute(stepExecution);

    assertEquals(BatchStatus.COMPLETED, stepExecution.getStatus());
    assertEquals(2, stepExecution.getWriteCount());
    assertEquals(2, stepExecution.getReadCount());
}

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