com.hadoop.compression.lzo.util

Class CompatibilityUtil

java.lang.Object

com.hadoop.compression.lzo.util.CompatibilityUtil

public class CompatibilityUtil
extends Object

Provides a compatibility layer for handling API incompatibilities between hadoop 1.x and 2.x via reflection.

Constructor Summary

Constructors

Constructor and Description
CompatibilityUtil()

Method Summary

Modifier and Type	Method and Description
static org.apache.hadoop.conf.Configuration	getConfiguration(org.apache.hadoop.mapreduce.JobContext context) Invokes getConfiguration() on JobContext.
static org.apache.hadoop.mapreduce.Counter	getCounter(org.apache.hadoop.mapreduce.TaskInputOutputContext context, Enum<?> counter) Invoke getCounter() on TaskInputOutputContext.
static long	getCounterValue(org.apache.hadoop.mapreduce.Counter counter) Hadoop 1 and 2 compatible counter.getValue()
static void	incrementCounter(org.apache.hadoop.mapreduce.Counter counter, long increment) Increment the counter.
static boolean	isVersion2x() Returns true whether the runtime hadoop version is 2.x, false otherwise.
static org.apache.hadoop.mapreduce.TaskAttemptContext	newTaskAttemptContext(org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.mapreduce.TaskAttemptID id) Creates TaskAttempContext from a JobConf and jobId using the correct constructor for based on the hadoop version.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CompatibilityUtil

public CompatibilityUtil()

Method Detail

isVersion2x

public static boolean isVersion2x()

Returns true whether the runtime hadoop version is 2.x, false otherwise.

Returns:

Whether the runtime hadoop version is 2.x

newTaskAttemptContext

public static org.apache.hadoop.mapreduce.TaskAttemptContext newTaskAttemptContext(org.apache.hadoop.conf.Configuration conf,
                                                                                   org.apache.hadoop.mapreduce.TaskAttemptID id)

Creates TaskAttempContext from a JobConf and jobId using the correct constructor for based on the hadoop version.

Parameters:

conf - Configuration

id - TaskAttemptID

Returns:

TaskAttemptContext

getConfiguration

public static org.apache.hadoop.conf.Configuration getConfiguration(org.apache.hadoop.mapreduce.JobContext context)

Invokes getConfiguration() on JobContext. Works with both hadoop 1 and 2.

Parameters:

context - JobContext

Returns:

Configuration

getCounter

public static org.apache.hadoop.mapreduce.Counter getCounter(org.apache.hadoop.mapreduce.TaskInputOutputContext context,
                                                             Enum<?> counter)

Invoke getCounter() on TaskInputOutputContext. Works with both Hadoop 1 and 2.

Parameters:

context - TaskInputOutputContext

counter - Mapreduce counter

Returns:

Counter

incrementCounter

public static void incrementCounter(org.apache.hadoop.mapreduce.Counter counter,
                                    long increment)

Increment the counter. Works with both Hadoop 1 and 2

Parameters:

counter - Counter

increment - Increment this counter by the given value

getCounterValue

public static long getCounterValue(org.apache.hadoop.mapreduce.Counter counter)

Hadoop 1 and 2 compatible counter.getValue()

Parameters:

counter - Counter

Returns:

Counter.getValue()