Example usage for org.springframework.batch.core.step.item ChunkMonitor resetOffset

Introduction

In this page you can find the example usage for org.springframework.batch.core.step.item ChunkMonitor resetOffset.

Prototype

public void resetOffset() 

Source Link

Usage

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

private void scan(final StepContribution contribution, final Chunk<I> inputs, final Chunk<O> outputs,
        ChunkMonitor chunkMonitor, boolean recovery) throws Exception {

    @SuppressWarnings("unchecked")
    final UserData<O> data = (UserData<O>) inputs.getUserData();

    if (logger.isDebugEnabled()) {
        if (recovery) {
            logger.debug("Scanning for failed item on recovery from write: " + inputs);
        } else {/*  w w  w .  j ava  2 s. c  om*/
            logger.debug("Scanning for failed item on write: " + inputs);
        }
    }
    if (outputs.isEmpty() || inputs.isEmpty()) {
        data.scanning(false);
        inputs.setBusy(false);
        chunkMonitor.resetOffset();
        return;
    }

    Chunk<I>.ChunkIterator inputIterator = inputs.iterator();
    Chunk<O>.ChunkIterator outputIterator = outputs.iterator();

    List<O> items = Collections.singletonList(outputIterator.next());
    inputIterator.next();
    try {
        writeItems(items);
        // If successful we are going to return and allow
        // the driver to commit...
        doAfterWrite(items);
        contribution.incrementWriteCount(1);
        inputIterator.remove();
        outputIterator.remove();
    } catch (Exception e) {
        try {
            doOnWriteError(e, items);
        } finally {
            Throwable cause = e;
            if (e instanceof StepListenerFailedException) {
                cause = e.getCause();
            }

            if (!shouldSkip(itemWriteSkipPolicy, cause, -1) && !rollbackClassifier.classify(cause)) {
                inputIterator.remove();
                outputIterator.remove();
            } else {
                checkSkipPolicy(inputIterator, outputIterator, cause, contribution, recovery);
            }
            if (rollbackClassifier.classify(cause)) {
                throw (Exception) cause;
            }
        }
    }
    chunkMonitor.incrementOffset();
    if (outputs.isEmpty()) {
        data.scanning(false);
        inputs.setBusy(false);
        chunkMonitor.resetOffset();
    }
}

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