org.apache.hadoop.tools.rumen

Class Hadoop20JHParser

java.lang.Object

org.apache.hadoop.tools.rumen.Hadoop20JHParser

All Implemented Interfaces:

Closeable, AutoCloseable, JobHistoryParser

public class Hadoop20JHParser
extends Object
implements JobHistoryParser

JobHistoryParser to parse job histories for hadoop 0.20 (META=1).

Constructor Summary

Constructors

Constructor and Description
Hadoop20JHParser(InputStream input)
Hadoop20JHParser(org.apache.hadoop.util.LineReader reader)

Method Summary

Modifier and Type	Method and Description
static boolean	canParse(InputStream input) Can this parser parse the input?
void	close()
org.apache.hadoop.mapreduce.jobhistory.HistoryEvent	nextEvent() Get the next HistoryEvent

Methods inherited from class java.lang.Object

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

Constructor Detail

Hadoop20JHParser

public Hadoop20JHParser(InputStream input)
                 throws IOException

Throws:

IOException

Hadoop20JHParser

public Hadoop20JHParser(org.apache.hadoop.util.LineReader reader)
                 throws IOException

Throws:

IOException

Method Detail

canParse

public static boolean canParse(InputStream input)
                        throws IOException

Can this parser parse the input?

Parameters:

input -

Returns:

Whether this parser can parse the input.

Throws:

IOException - We will deem a stream to be a good 0.20 job history stream if the first line is exactly "Meta VERSION=\"1\" ."

nextEvent

public org.apache.hadoop.mapreduce.jobhistory.HistoryEvent nextEvent()

Description copied from interface: JobHistoryParser

Get the next HistoryEvent

Specified by:

nextEvent in interface JobHistoryParser

Returns:

the next HistoryEvent. If no more events left, return null.

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Throws:

IOException