Example usage for org.springframework.batch.item.util FileUtils setUpOutputFile

Introduction

In this page you can find the example usage for org.springframework.batch.item.util FileUtils setUpOutputFile.

Prototype

public static void setUpOutputFile(File file, boolean restarted, boolean append, boolean overwriteOutputFile) 

Source Link

Document

Set up output file for batch processing.

Usage

From source file:org.springframework.batch.item.xml.StaxEventItemWriter.java

/**
 * Helper method for opening output source at given file position
 *///from   w w  w  .j  av a 2s .co m
private void open(long position) {

    File file;
    FileOutputStream os = null;
    FileChannel fileChannel = null;

    try {
        file = resource.getFile();
        FileUtils.setUpOutputFile(file, restarted, false, overwriteOutput);
        Assert.state(resource.exists(), "Output resource must exist");
        os = new FileOutputStream(file, true);
        fileChannel = os.getChannel();
        channel = os.getChannel();
        setPosition(position);
    } catch (IOException ioe) {
        throw new DataAccessResourceFailureException("Unable to write to file resource: [" + resource + "]",
                ioe);
    }

    XMLOutputFactory outputFactory = createXmlOutputFactory();

    if (outputFactory.isPropertySupported("com.ctc.wstx.automaticEndElements")) {
        // If the current XMLOutputFactory implementation is supplied by
        // Woodstox >= 3.2.9 we want to disable its
        // automatic end element feature (see:
        // http://jira.codehaus.org/browse/WSTX-165) per
        // http://jira.spring.io/browse/BATCH-761).
        outputFactory.setProperty("com.ctc.wstx.automaticEndElements", Boolean.FALSE);
    }
    if (outputFactory.isPropertySupported("com.ctc.wstx.outputValidateStructure")) {
        // On restart we don't write the root element so we have to disable
        // structural validation (see:
        // http://jira.spring.io/browse/BATCH-1681).
        outputFactory.setProperty("com.ctc.wstx.outputValidateStructure", Boolean.FALSE);
    }

    try {
        final FileChannel channel = fileChannel;
        if (transactional) {
            TransactionAwareBufferedWriter writer = new TransactionAwareBufferedWriter(channel, new Runnable() {
                @Override
                public void run() {
                    closeStream();
                }
            });

            writer.setEncoding(encoding);
            writer.setForceSync(forceSync);
            bufferedWriter = writer;
        } else {
            bufferedWriter = new BufferedWriter(new OutputStreamWriter(os, encoding));
        }
        delegateEventWriter = createXmlEventWriter(outputFactory, bufferedWriter);
        eventWriter = new NoStartEndDocumentStreamWriter(delegateEventWriter);
        initNamespaceContext(delegateEventWriter);
        if (!restarted) {
            startDocument(delegateEventWriter);
            if (forceSync) {
                channel.force(false);
            }
        }
    } catch (XMLStreamException xse) {
        throw new DataAccessResourceFailureException("Unable to write to file resource: [" + resource + "]",
                xse);
    } catch (UnsupportedEncodingException e) {
        throw new DataAccessResourceFailureException(
                "Unable to write to file resource: [" + resource + "] with encoding=[" + encoding + "]", e);
    } catch (IOException e) {
        throw new DataAccessResourceFailureException("Unable to write to file resource: [" + resource + "]", e);
    }
}

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