datafu.hourglass.mapreduce
Class DistributedCacheHelper

java.lang.Object
  datafu.hourglass.mapreduce.DistributedCacheHelper

public class DistributedCacheHelper
extends java.lang.Object

Methods for working with the Hadoop distributed cache.

Author:

"Matthew Hayes"

Constructor Summary

DistributedCacheHelper()

Method Summary

static java.lang.Object	readObject(org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.fs.Path path) Deserializes an object from a path in HDFS.
static void	writeObject(org.apache.hadoop.conf.Configuration conf, java.lang.Object obj, org.apache.hadoop.fs.Path path) Serializes an object to a path in HDFS and adds the file to the distributed cache.

Methods inherited from class java.lang.Object

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

Constructor Detail

DistributedCacheHelper

public DistributedCacheHelper()

Method Detail

readObject

public static java.lang.Object readObject(org.apache.hadoop.conf.Configuration conf,
                                          org.apache.hadoop.fs.Path path)
                                   throws java.io.IOException

Deserializes an object from a path in HDFS.

Parameters:

conf - Hadoop configuration

path - Path to deserialize from

Returns:

Deserialized object

Throws:

java.io.IOException

writeObject

public static void writeObject(org.apache.hadoop.conf.Configuration conf,
                               java.lang.Object obj,
                               org.apache.hadoop.fs.Path path)
                        throws java.io.IOException

Serializes an object to a path in HDFS and adds the file to the distributed cache.

Parameters:

conf - Hadoop configuration

obj - Object to serialize

path - Path to serialize object to

Throws:

java.io.IOException