org.apache.parquet.hadoop.util

Class ContextUtil

java.lang.Object

org.apache.parquet.hadoop.util.ContextUtil

public class ContextUtil
extends Object

Utility methods to allow applications to deal with inconsistencies between MapReduce Context Objects API between hadoop-0.20 and later versions.

Constructor Summary

Constructors

Constructor and Description
ContextUtil()

Method Summary

Methods

Modifier and Type	Method and Description
static org.apache.hadoop.conf.Configuration	getConfiguration(org.apache.hadoop.mapreduce.JobContext context) Invoke getConfiguration() method on JobContext.
static org.apache.hadoop.mapreduce.Counter	getCounter(org.apache.hadoop.mapreduce.TaskAttemptContext context, String groupName, String counterName)
static boolean	hasCounterMethod(org.apache.hadoop.mapreduce.TaskAttemptContext context)
static void	incrementCounter(org.apache.hadoop.mapreduce.Counter counter, long increment)
static org.apache.hadoop.mapreduce.Counter	newGenericCounter(String name, String displayName, long value)
static org.apache.hadoop.mapreduce.JobContext	newJobContext(org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.mapreduce.JobID jobId) Creates JobContext from a JobConf and jobId using the correct constructor for based on Hadoop version.
static org.apache.hadoop.mapreduce.TaskAttemptContext	newTaskAttemptContext(org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.mapreduce.TaskAttemptID taskAttemptId) Creates TaskAttempContext from a JobConf and jobId using the correct constructor for based on Hadoop version.

Methods inherited from class java.lang.Object

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

Constructor Detail

ContextUtil

public ContextUtil()

Method Detail

newJobContext

public static org.apache.hadoop.mapreduce.JobContext newJobContext(org.apache.hadoop.conf.Configuration conf,
                                                   org.apache.hadoop.mapreduce.JobID jobId)

Creates JobContext from a JobConf and jobId using the correct constructor for based on Hadoop version. jobId could be null.

newTaskAttemptContext

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

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

newGenericCounter

public static org.apache.hadoop.mapreduce.Counter newGenericCounter(String name,
                                                    String displayName,
                                                    long value)

Returns:

with Hadoop 2 : new GenericCounter(args),
with Hadoop 1 : new Counter(args)

getConfiguration

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

Invoke getConfiguration() method on JobContext. Works with both Hadoop 1 and 2.

getCounter

public static org.apache.hadoop.mapreduce.Counter getCounter(org.apache.hadoop.mapreduce.TaskAttemptContext context,
                                             String groupName,
                                             String counterName)

hasCounterMethod

public static boolean hasCounterMethod(org.apache.hadoop.mapreduce.TaskAttemptContext context)

incrementCounter

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