Example usage for org.apache.hadoop RandomTextWriterJob RandomTextWriterJob

Introduction

In this page you can find the example usage for org.apache.hadoop RandomTextWriterJob RandomTextWriterJob.

Prototype

RandomTextWriterJob

Source Link

Usage

From source file:org.apache.tez.mapreduce.TestMRRJobs.java

License:Apache License

@Test(timeout = 60000)
public void testRandomWriter() throws IOException, InterruptedException, ClassNotFoundException {

    LOG.info("\n\n\nStarting testRandomWriter().");
    if (!(new File(MiniTezCluster.APPJAR)).exists()) {
        LOG.info("MRAppJar " + MiniTezCluster.APPJAR + " not found. Not running test.");
        return;/*  w  ww  . j  a va2  s.c om*/
    }

    RandomTextWriterJob randomWriterJob = new RandomTextWriterJob();
    mrrTezCluster.getConfig().set(RandomTextWriterJob.TOTAL_BYTES, "3072");
    mrrTezCluster.getConfig().set(RandomTextWriterJob.BYTES_PER_MAP, "1024");
    Job job = randomWriterJob.createJob(mrrTezCluster.getConfig());
    Path outputDir = new Path(OUTPUT_ROOT_DIR, "random-output");
    FileOutputFormat.setOutputPath(job, outputDir);
    job.setSpeculativeExecution(false);
    job.setJarByClass(RandomTextWriterJob.class);
    job.setMaxMapAttempts(1); // speed up failures
    job.submit();
    String trackingUrl = job.getTrackingURL();
    String jobId = job.getJobID().toString();
    boolean succeeded = job.waitForCompletion(true);
    Assert.assertTrue(succeeded);
    Assert.assertEquals(JobStatus.State.SUCCEEDED, job.getJobState());
    Assert.assertTrue("Tracking URL was " + trackingUrl + " but didn't Match Job ID " + jobId,
            trackingUrl.endsWith(jobId.substring(jobId.lastIndexOf("_")) + "/"));

    // Make sure there are three files in the output-dir

    RemoteIterator<FileStatus> iterator = FileContext.getFileContext(mrrTezCluster.getConfig())
            .listStatus(outputDir);
    int count = 0;
    while (iterator.hasNext()) {
        FileStatus file = iterator.next();
        if (!file.getPath().getName().equals(FileOutputCommitter.SUCCEEDED_FILE_NAME)) {
            count++;
        }
    }
    Assert.assertEquals("Number of part files is wrong!", 3, count);

}

---