MRApps extends Apps { public static String getJobFile(Configuration conf, String user, org.apache.hadoop.mapreduce.JobID jobId) { Path jobFile = new Path(MRApps.getStagingAreaDir(conf, user), jobId.toString() + Path.SEPARATOR + MRJobConfig.JOB_CONF_FILE); return jobFile.toString(); }  static String toString(JobId jid); static JobId toJobID(String jid); static String toString(TaskId tid); static TaskId toTaskID(String tid); static String toString(TaskAttemptId taid); static TaskAttemptId toTaskAttemptID(String taid); static String taskSymbol(TaskType type); static TaskType taskType(String symbol); static TaskAttemptStateUI taskAttemptState(String attemptStateStr); static TaskStateUI taskState(String taskStateStr); @SuppressWarnings("deprecation") static void setClasspath(Map<String, String> environment,
      Configuration conf); static void setJobClassLoader(Configuration conf); static Path getStagingAreaDir(Configuration conf, String user); static String getJobFile(Configuration conf, String user, 
      org.apache.hadoop.mapreduce.JobID jobId); static Path getEndJobCommitSuccessFile(Configuration conf, String user,
      JobId jobId); static Path getEndJobCommitFailureFile(Configuration conf, String user,
      JobId jobId); static Path getStartJobCommitFile(Configuration conf, String user,
      JobId jobId); static void setupDistributedCache( 
      Configuration conf, 
      Map<String, LocalResource> localResources); static void addLog4jSystemProperties(
      String logLevel, long logSize, int numBackups, List<String> vargs); static void setEnvFromInputString(Map<String, String> env,
      String envString, Configuration conf); @Public @Unstable static void addToEnvironment(Map<String, String> environment,
      String variable, String value, Configuration conf); static String crossPlatformifyMREnv(Configuration conf, Environment env); static final Log LOG; }
@Test (timeout = 120000) public void testGetJobFileWithUser() { Configuration conf = new Configuration(); conf.set(MRJobConfig.MR_AM_STAGING_DIR, "/my/path/to/staging"); String jobFile = MRApps.getJobFile(conf, "dummy-user", new JobID("dummy-job", 12345)); assertNotNull("getJobFile results in null.", jobFile); assertEquals("jobFile with specified user is not as expected.", "/my/path/to/staging/dummy-user/.staging/job_dummy-job_12345/job.xml", jobFile); }