Example usage for org.springframework.batch.integration.chunk ChunkProcessorChunkHandler ChunkProcessorChunkHandler

Introduction

In this page you can find the example usage for org.springframework.batch.integration.chunk ChunkProcessorChunkHandler ChunkProcessorChunkHandler.

Prototype

ChunkProcessorChunkHandler

Source Link

Usage

From source file:es.fcs.batch.integration.chunk.MyRemoteChunkHandlerFactoryBean.java

/**
 * Builds a {@link ChunkHandler} from the {@link ChunkProcessor} extracted from the {@link #setStep(TaskletStep)
 * step} provided. Also modifies the step to send chunks to the chunk handler via the
 * {@link #setChunkWriter(ItemWriter) chunk writer}.
 * //from   w w  w  .  ja  va2  s . c  o  m
 * @see FactoryBean#getObject()
 */
public ChunkProcessor<T> getObject() throws Exception {

    if (stepContributionSource == null) {
        Assert.state(chunkWriter instanceof StepContributionSource,
                "The chunk writer must be a StepContributionSource or else the source must be provided explicitly");
        stepContributionSource = (StepContributionSource) chunkWriter;
    }

    Assert.state(step instanceof TaskletStep, "Step [" + step.getName() + "] must be a TaskletStep");
    logger.debug("Converting TaskletStep with name=" + step.getName());

    Tasklet tasklet = getTasklet((TaskletStep) step);
    Assert.state(tasklet instanceof ChunkOrientedTasklet<?>,
            "Tasklet must be ChunkOrientedTasklet in step=" + step.getName());

    ChunkProcessor<T> chunkProcessor = getChunkProcessor((ChunkOrientedTasklet<?>) tasklet);
    Assert.state(chunkProcessor != null,
            "ChunkProcessor must be accessible in Tasklet in step=" + step.getName());

    //      System.out.println("====="+chunkWriter.getClass());
    //      setField(chunkWriter, "chunkProcessor", chunkProcessor);
    //      if (Proxy.isProxyClass(chunkWriter.getClass())){
    //         InvocationHandler ih = Proxy.getInvocationHandler(chunkWriter);
    //         Class[] cls = new Class[]{ChunkProcessor.class};
    //         Method m = MyChunkMessageChannelItemWriter.class.getMethod("setChunkProcessor", cls);
    //         try {
    //            ih.invoke(chunkWriter, m, new Object[]{chunkProcessor});
    //         } catch (Throwable e) {
    //            // TODO Auto-generated catch block
    //            e.printStackTrace();
    //         }
    //      } else {
    //         ((MyChunkMessageChannelItemWriter<T>)chunkWriter).setChunkProcessor(chunkProcessor);
    //      }
    ItemWriter<T> itemWriter = getItemWriter(chunkProcessor);
    Assert.state(!(itemWriter instanceof ChunkMessageChannelItemWriter<?>),
            "Cannot adapt step [" + step.getName()
                    + "] because it already has a remote chunk writer.  Use a local writer in the step.");

    replaceChunkProcessor((ChunkOrientedTasklet<?>) tasklet, chunkWriter, stepContributionSource);
    if (chunkWriter instanceof StepExecutionListener) {
        step.registerStepExecutionListener((StepExecutionListener) chunkWriter);
    }

    ChunkProcessorChunkHandler<T> handler = new ChunkProcessorChunkHandler<T>();
    setNonBuffering(chunkProcessor);
    handler.setChunkProcessor(chunkProcessor);
    // TODO: create step context for the processor in case it has
    // scope="step" dependencies
    handler.afterPropertiesSet();

    return chunkProcessor;

}

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From source file:org.springframework.batch.integration.chunk.RemoteChunkHandlerFactoryBean.java

/**
 * Builds a {@link ChunkHandler} from the {@link ChunkProcessor} extracted from the {@link #setStep(TaskletStep)
 * step} provided. Also modifies the step to send chunks to the chunk handler via the
 * {@link #setChunkWriter(ItemWriter) chunk writer}.
 * //  ww w . ja va  2 s  .  co  m
 * @see FactoryBean#getObject()
 */
public ChunkHandler<T> getObject() throws Exception {

    if (stepContributionSource == null) {
        Assert.state(chunkWriter instanceof StepContributionSource,
                "The chunk writer must be a StepContributionSource or else the source must be provided explicitly");
        stepContributionSource = (StepContributionSource) chunkWriter;
    }

    Assert.state(step instanceof TaskletStep, "Step [" + step.getName() + "] must be a TaskletStep");
    if (logger.isDebugEnabled()) {
        logger.debug("Converting TaskletStep with name=" + step.getName());
    }

    Tasklet tasklet = getTasklet((TaskletStep) step);
    Assert.state(tasklet instanceof ChunkOrientedTasklet<?>,
            "Tasklet must be ChunkOrientedTasklet in step=" + step.getName());

    ChunkProcessor<T> chunkProcessor = getChunkProcessor((ChunkOrientedTasklet<?>) tasklet);
    Assert.state(chunkProcessor != null,
            "ChunkProcessor must be accessible in Tasklet in step=" + step.getName());

    ItemWriter<T> itemWriter = getItemWriter(chunkProcessor);
    Assert.state(!(itemWriter instanceof ChunkMessageChannelItemWriter<?>),
            "Cannot adapt step [" + step.getName()
                    + "] because it already has a remote chunk writer.  Use a local writer in the step.");

    replaceChunkProcessor((ChunkOrientedTasklet<?>) tasklet, chunkWriter, stepContributionSource);
    if (chunkWriter instanceof StepExecutionListener) {
        step.registerStepExecutionListener((StepExecutionListener) chunkWriter);
    }

    ChunkProcessorChunkHandler<T> handler = new ChunkProcessorChunkHandler<T>();
    setNonBuffering(chunkProcessor);
    handler.setChunkProcessor(chunkProcessor);
    // TODO: create step context for the processor in case it has
    // scope="step" dependencies
    handler.afterPropertiesSet();

    return handler;

}

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