org.apache.hadoop.mapred.TaskUmbilicalProtocol#org.apache.hadoop.mapred.Counters.Counter源码实例Demo

@SuppressWarnings("deprecation")
private void checkLegacyNames(Counters counters) {
  assertEquals("New name", 1, counters.findCounter(
      TaskCounter.class.getName(), "MAP_INPUT_RECORDS").getValue());
  assertEquals("Legacy name", 1, counters.findCounter(
      "org.apache.hadoop.mapred.Task$Counter",
      "MAP_INPUT_RECORDS").getValue());
  assertEquals("Legacy enum", 1,
      counters.findCounter(Task.Counter.MAP_INPUT_RECORDS).getValue());

  assertEquals("New name", 1, counters.findCounter(
      JobCounter.class.getName(), "DATA_LOCAL_MAPS").getValue());
  assertEquals("Legacy name", 1, counters.findCounter(
      "org.apache.hadoop.mapred.JobInProgress$Counter",
      "DATA_LOCAL_MAPS").getValue());
  assertEquals("Legacy enum", 1,
      counters.findCounter(JobInProgress.Counter.DATA_LOCAL_MAPS).getValue());

  assertEquals("New name", 1, counters.findCounter(
      FileSystemCounter.class.getName(), "FILE_BYTES_READ").getValue());
  assertEquals("New name and method", 1, counters.findCounter("file",
      FileSystemCounter.BYTES_READ).getValue());
  assertEquals("Legacy name", 1, counters.findCounter(
      "FileSystemCounters",
      "FILE_BYTES_READ").getValue());
}
 

@Test
public void testFileSystemGroupIteratorConcurrency() {
  Counters counters = new Counters();
  // create 2 filesystem counter groups
  counters.findCounter("fs1", FileSystemCounter.BYTES_READ).increment(1);
  counters.findCounter("fs2", FileSystemCounter.BYTES_READ).increment(1);
  
  // Iterate over the counters in this group while updating counters in
  // the group
  Group group = counters.getGroup(FileSystemCounter.class.getName());
  Iterator<Counter> iterator = group.iterator();
  counters.findCounter("fs3", FileSystemCounter.BYTES_READ).increment(1);
  assertTrue(iterator.hasNext());
  iterator.next();
  counters.findCounter("fs3", FileSystemCounter.BYTES_READ).increment(1);
  assertTrue(iterator.hasNext());
  iterator.next();
}
 

@SuppressWarnings("rawtypes")
@Test
public void testFrameworkCounter() {
  GroupFactory groupFactory = new GroupFactoryForTest();
  FrameworkGroupFactory frameworkGroupFactory = 
      groupFactory.newFrameworkGroupFactory(JobCounter.class);
  Group group = (Group) frameworkGroupFactory.newGroup("JobCounter");
  
  FrameworkCounterGroup counterGroup = 
      (FrameworkCounterGroup) group.getUnderlyingGroup();

  org.apache.hadoop.mapreduce.Counter count1 = 
      counterGroup.findCounter(JobCounter.NUM_FAILED_MAPS.toString());
  Assert.assertNotNull(count1);
  
  // Verify no exception get thrown when finding an unknown counter
  org.apache.hadoop.mapreduce.Counter count2 = 
      counterGroup.findCounter("Unknown");
  Assert.assertNull(count2);
}
 

@SuppressWarnings("deprecation")
private void checkLegacyNames(Counters counters) {
  assertEquals("New name", 1, counters.findCounter(
      TaskCounter.class.getName(), "MAP_INPUT_RECORDS").getValue());
  assertEquals("Legacy name", 1, counters.findCounter(
      "org.apache.hadoop.mapred.Task$Counter",
      "MAP_INPUT_RECORDS").getValue());
  assertEquals("Legacy enum", 1,
      counters.findCounter(Task.Counter.MAP_INPUT_RECORDS).getValue());

  assertEquals("New name", 1, counters.findCounter(
      JobCounter.class.getName(), "DATA_LOCAL_MAPS").getValue());
  assertEquals("Legacy name", 1, counters.findCounter(
      "org.apache.hadoop.mapred.JobInProgress$Counter",
      "DATA_LOCAL_MAPS").getValue());
  assertEquals("Legacy enum", 1,
      counters.findCounter(JobInProgress.Counter.DATA_LOCAL_MAPS).getValue());

  assertEquals("New name", 1, counters.findCounter(
      FileSystemCounter.class.getName(), "FILE_BYTES_READ").getValue());
  assertEquals("New name and method", 1, counters.findCounter("file",
      FileSystemCounter.BYTES_READ).getValue());
  assertEquals("Legacy name", 1, counters.findCounter(
      "FileSystemCounters",
      "FILE_BYTES_READ").getValue());
}
 

public Task(String jobFile, TaskAttemptID taskId, int partition) {
  this.jobFile = jobFile;
  this.taskId = taskId;
   
  this.partition = partition;
  this.taskStatus = TaskStatus.createTaskStatus(isMapTask(), this.taskId, 
                                                0.0f, 
                                                TaskStatus.State.UNASSIGNED, 
                                                "", "", "", 
                                                isMapTask() ? 
                                                  TaskStatus.Phase.MAP : 
                                                  TaskStatus.Phase.SHUFFLE, 
                                                counters);
  this.mapOutputFile.setJobId(taskId.getJobID());
  spilledRecordsCounter = counters.findCounter(Counter.SPILLED_RECORDS);
}
 

@SuppressWarnings("rawtypes")
@Test
public void testFrameworkCounter() {
  GroupFactory groupFactory = new GroupFactoryForTest();
  FrameworkGroupFactory frameworkGroupFactory = 
      groupFactory.newFrameworkGroupFactory(JobCounter.class);
  Group group = (Group) frameworkGroupFactory.newGroup("JobCounter");
  
  FrameworkCounterGroup counterGroup = 
      (FrameworkCounterGroup) group.getUnderlyingGroup();

  org.apache.hadoop.mapreduce.Counter count1 = 
      counterGroup.findCounter(JobCounter.NUM_FAILED_MAPS.toString());
  Assert.assertNotNull(count1);
  
  // Verify no exception get thrown when finding an unknown counter
  org.apache.hadoop.mapreduce.Counter count2 = 
      counterGroup.findCounter("Unknown");
  Assert.assertNull(count2);
}
 

public Counters.Counter getCounter(String group, String name) {
  Counters.Counter counter = null;
  if (counters != null) {
    counter = counters.findCounter(group, name);
    if (counter == null) {
      Group grp = counters.addGroup(group, group);
      counter = grp.addCounter(name, name, 10);
    }
  }
  return counter;
}
 

/**
 * Verify counter value works
 */
@SuppressWarnings("deprecation")
@Test
public void testCounterValue() {
  Counters counters = new Counters();
  final int NUMBER_TESTS = 100;
  final int NUMBER_INC = 10;
  final Random rand = new Random();
  for (int i = 0; i < NUMBER_TESTS; i++) {
    long initValue = rand.nextInt();
    long expectedValue = initValue;
    Counter counter = counters.findCounter("foo", "bar");
    counter.setValue(initValue);
    assertEquals("Counter value is not initialized correctly",
                 expectedValue, counter.getValue());
    for (int j = 0; j < NUMBER_INC; j++) {
      int incValue = rand.nextInt();
      counter.increment(incValue);
      expectedValue += incValue;
      assertEquals("Counter value is not incremented correctly",
                   expectedValue, counter.getValue());
    }
    expectedValue = rand.nextInt();
    counter.setValue(expectedValue);
    assertEquals("Counter value is not set correctly",
                 expectedValue, counter.getValue());
  }
}
 

@SuppressWarnings("deprecation")
@Test
public void testWriteWithLegacyNames() {
  Counters counters = new Counters();
  counters.incrCounter(Task.Counter.MAP_INPUT_RECORDS, 1);
  counters.incrCounter(JobInProgress.Counter.DATA_LOCAL_MAPS, 1);
  counters.findCounter("FileSystemCounters", "FILE_BYTES_READ").increment(1);
  
  checkLegacyNames(counters);
}
 

@SuppressWarnings("deprecation")
@Test
public void testGroupIteratorConcurrency() {
  Counters counters = new Counters();
  counters.incrCounter("group1", "counter1", 1);
  Group group = counters.getGroup("group1");
  Iterator<Counter> iterator = group.iterator();
  counters.incrCounter("group1", "counter2", 1);
  iterator.next();
}
 

@Test
public void testFilesystemCounter() {
  GroupFactory groupFactory = new GroupFactoryForTest();
  Group fsGroup = groupFactory.newFileSystemGroup();

  org.apache.hadoop.mapreduce.Counter count1 = 
      fsGroup.findCounter("ANY_BYTES_READ");
  Assert.assertNotNull(count1);
  
  // Verify no exception get thrown when finding an unknown counter
  org.apache.hadoop.mapreduce.Counter count2 = 
      fsGroup.findCounter("Unknown");
  Assert.assertNull(count2);
}
 

private void validateCounters() throws IOException {
  Counters counters = job.running_.getCounters();
  assertNotNull("Counters", counters);
  Group group = counters.getGroup("UserCounters");
  assertNotNull("Group", group);
  Counter counter = group.getCounterForName("InputLines");
  assertNotNull("Counter", counter);
  assertEquals(3, counter.getCounter());
}
 

@SuppressWarnings("deprecation")
@Test
public void testWriteWithLegacyNames() {
  Counters counters = new Counters();
  counters.incrCounter(Task.Counter.MAP_INPUT_RECORDS, 1);
  counters.incrCounter(JobInProgress.Counter.DATA_LOCAL_MAPS, 1);
  counters.findCounter("FileSystemCounters", "FILE_BYTES_READ").increment(1);
  
  checkLegacyNames(counters);
}
 

@SuppressWarnings("deprecation")
@Test
public void testGroupIteratorConcurrency() {
  Counters counters = new Counters();
  counters.incrCounter("group1", "counter1", 1);
  Group group = counters.getGroup("group1");
  Iterator<Counter> iterator = group.iterator();
  counters.incrCounter("group1", "counter2", 1);
  iterator.next();
}
 

protected OldCombinerRunner(Class<? extends Reducer<K,V,K,V>> cls,
                            JobConf conf,
                            Counters.Counter inputCounter,
                            TaskReporter reporter) {
  super(inputCounter, conf, reporter);
  combinerClass = cls;
  keyClass = (Class<K>) job.getMapOutputKeyClass();
  valueClass = (Class<V>) job.getMapOutputValueClass();
  comparator = (RawComparator<K>) job.getOutputKeyComparator();
}
 

private void validateCounters() throws IOException {
  Counters counters = job.running_.getCounters();
  assertNotNull("Counters", counters);
  Group group = counters.getGroup("UserCounters");
  assertNotNull("Group", group);
  Counter counter = group.getCounterForName("InputLines");
  assertNotNull("Counter", counter);
  assertEquals(3, counter.getCounter());
}
 

protected static void setCounterValue(@Nullable Counter counter, long value) {
    if (counter != null) {
        synchronized (counter) {
            counter.setValue(value);
        }
    }
}
 

protected static void incrCounter(@Nullable Counter counter, long incr) {
    if (counter != null) {
        synchronized (counter) {
            counter.increment(incr);
        }
    }
}
 

protected static void setCounterValue(@Nullable Counter counter, long value) {
    if (counter != null) {
        synchronized (counter) {
            counter.setValue(value);
        }
    }
}
 

protected static void incrCounter(@Nullable Counter counter, long incr) {
    if (counter != null) {
        synchronized (counter) {
            counter.increment(incr);
        }
    }
}
 

NewCombinerRunner(Class reducerClass,
                  JobConf job,
                  org.apache.hadoop.mapreduce.TaskAttemptID taskId,
                  org.apache.hadoop.mapreduce.TaskAttemptContext context,
                  Counters.Counter inputCounter,
                  TaskReporter reporter,
                  org.apache.hadoop.mapreduce.OutputCommitter committer) {
  super(inputCounter, job, reporter);
  this.reducerClass = reducerClass;
  this.taskId = taskId;
  keyClass = (Class<K>) context.getMapOutputKeyClass();
  valueClass = (Class<V>) context.getMapOutputValueClass();
  comparator = (RawComparator<K>) context.getSortComparator();
  this.committer = committer;
}
 

protected static void incrCounter(@Nullable Counter counter, long incr) {
    if (counter != null) {
        synchronized (counter) {
            counter.increment(incr);
        }
    }
}
 

@Override
public Counter getCounter(String group, String name)
{
  Counters.Counter counter = null;
  if (counters != null) {
    counter = counters.findCounter(group, name);
  }

  return counter;
}
 

@Override
public Counter getCounter(Enum<?> key)
{
  Counters.Counter counter = null;
  if (counters != null) {
    counter = counters.findCounter(key);
  }

  return counter;
}
 

@Override
public List<HadoopCounterKeyValuePair> getAllCounters() throws IOException {
	List<HadoopCounterKeyValuePair> result = new ArrayList<HadoopCounterKeyValuePair>();
	for (Counters.Group group : job.getCounters()) {
		for (Counter counter : group) {
			result.add(new HadoopCounterKeyValuePair(counter.getName(), group.getName(), counter.getValue()));
		}
	}
	return result;
}
 

@SuppressWarnings("deprecation")
private static void parseAndAddJobCounters(Map<String, String> job, String counters) {
    try {
        Counters counterGroups = Counters.fromEscapedCompactString(counters);
        for (Group otherGroup : counterGroups) {
            Group group = counterGroups.getGroup(otherGroup.getName());
            for (Counter otherCounter : otherGroup) {
                Counter counter = group.getCounterForName(otherCounter.getName());
                job.put(otherCounter.getName(), String.valueOf(counter.getValue()));
            }
        }
    } catch (ParseException e) {
       LOG.warn("Failed to parse job counters", e);
    }
}
 

public ReduceValuesIterator (KeyValuesReader in,
    Progressable reporter,
    Counter reduceInputValueCounter)
        throws IOException {
  this.reduceInputValueCounter = reduceInputValueCounter;
  this.in = in;
  this.reporter = reporter;
}
 

CombinerRunner(Counters.Counter inputCounter,
               JobConf job,
               TaskReporter reporter) {
  this.inputCounter = inputCounter;
  this.job = job;
  this.reporter = reporter;
}
 

public IndexRecord spill(JobConf job, FSDataOutputStream out,
    Class<K> keyClass, Class<V> valClass, CompressionCodec codec,
    Counter spillCounter) throws IOException {
  IFile.Writer<K, V> writer = null;
  IndexRecord rec = new IndexRecord();
  long segmentStart = out.getPos();
  try {
    writer = new Writer<K, V>(job, out, keyClass, valClass, codec,
        spillCounter);
    // spill directly
    KeyValueSpillIterator kvSortedArray = this.getKeyValueSpillIterator();
    MemoryBlockIndex memBlkIdx = kvSortedArray.next();
    while (memBlkIdx != null) {
      int pos = memBlkIdx.getIndex();
      MemoryBlock memBlk = memBlkIdx.getMemoryBlock();
      writer.append(kvbuffer, memBlk.offsets[pos], memBlk.keyLenArray[pos],
          memBlk.valueLenArray[pos]);
      memBlkIdx = kvSortedArray.next();
    }
  } finally {
    // close the writer
    if (null != writer)
      writer.close();
  }
  rec.startOffset = segmentStart;
  rec.rawLength = writer.getRawLength();
  rec.partLength = writer.getCompressedLength();
  writer = null;
  return rec;
}
 

public void testCommandLine() throws IOException
{
  try {
    try {
      OUTPUT_DIR.getAbsoluteFile().delete();
    } catch (Exception e) {
    }

    createInput();
    boolean mayExit = false;

    // During tests, the default Configuration will use a local mapred
    // So don't specify -config or -cluster
    StreamJob job = new StreamJob(genArgs(), mayExit);      
    job.go();
    File outFile = new File(OUTPUT_DIR, "part-00000").getAbsoluteFile();
    String output = StreamUtil.slurp(outFile);
    outFile.delete();
    assertEquals(outputExpect, output);
    
    Counters counters = job.running_.getCounters();
    assertNotNull("Counters", counters);
    Group group = counters.getGroup("UserCounters");
    assertNotNull("Group", group);
    Counter counter = group.getCounterForName("InputLines");
    assertNotNull("Counter", counter);
    assertEquals(3, counter.getCounter());
  } finally {
    File outFileCRC = new File(OUTPUT_DIR, ".part-00000.crc").getAbsoluteFile();
    INPUT_FILE.delete();
    outFileCRC.delete();
    OUTPUT_DIR.getAbsoluteFile().delete();
  }
}