Examples with TrackedInputStream org.apache.jena.hadoop.rdf.io.input.util.TrackedInputStream used on opensource projects

Example 1 with TrackedInputStream

use of org.apache.jena.hadoop.rdf.io.input.util.TrackedInputStream in project jena by apache.

the class AbstractWholeFileNodeTupleReader method initialize.

@Override
public void initialize(InputSplit genericSplit, TaskAttemptContext context) throws IOException {
    LOG.debug("initialize({}, {})", genericSplit, context);
    // Assuming file split
    if (!(genericSplit instanceof FileSplit))
        throw new IOException("This record reader only supports FileSplit inputs");
    FileSplit split = (FileSplit) genericSplit;
    // Configuration
    Configuration config = context.getConfiguration();
    this.ignoreBadTuples = config.getBoolean(RdfIOConstants.INPUT_IGNORE_BAD_TUPLES, true);
    if (this.ignoreBadTuples)
        LOG.warn("Configured to ignore bad tuples, parsing errors will be logged and further parsing aborted but no user visible errors will be thrown.  Consider setting {} to false to disable this behaviour", RdfIOConstants.INPUT_IGNORE_BAD_TUPLES);
    // Figure out what portion of the file to read
    if (split.getStart() > 0)
        throw new IOException("This record reader requires a file split which covers the entire file");
    final Path file = split.getPath();
    long totalLength = file.getFileSystem(context.getConfiguration()).getFileStatus(file).getLen();
    CompressionCodecFactory factory = new CompressionCodecFactory(config);
    this.compressionCodecs = factory.getCodec(file);
    LOG.info(String.format("Got split with start %d and length %d for file with total length of %d", new Object[] { split.getStart(), split.getLength(), totalLength }));
    if (totalLength > split.getLength())
        throw new IOException("This record reader requires a file split which covers the entire file");
    // Open the file and prepare the input stream
    FileSystem fs = file.getFileSystem(config);
    FSDataInputStream fileIn = fs.open(file);
    this.length = split.getLength();
    if (this.compressionCodecs != null) {
        // Compressed input
        input = new TrackedInputStream(this.compressionCodecs.createInputStream(fileIn));
    } else {
        // Uncompressed input
        input = new TrackedInputStream(fileIn);
    }
    // Set up background thread for parser
    iter = this.getPipedIterator();
    this.stream = this.getPipedStream(iter, this.input);
    RDFParserBuilder builder = RdfIOUtils.createRDFParserBuilder(context, file);
    Runnable parserRunnable = this.createRunnable(this, this.input, stream, this.getRdfLanguage(), builder);
    this.parserThread = new Thread(parserRunnable);
    this.parserThread.setDaemon(true);
    this.parserThread.start();
}