org.apache.hadoop.contrib.utils.join
Class JobBase

java.lang.Object
  org.apache.hadoop.contrib.utils.join.JobBase

All Implemented Interfaces:

Closeable, JobConfigurable, Mapper, Reducer

Direct Known Subclasses:

DataJoinMapperBase, DataJoinReducerBase

public abstract class JobBase
extends Object
implements Mapper, Reducer

A common base implementing some statics collecting mechanisms that are commonly used in a typical map/reduce job.

Field Summary

static org.apache.commons.logging.Log

LOG

Constructor Summary

JobBase()

Method Summary

protected Double	addDoubleValue(Object name, double inc) Increment the given counter by the given incremental value If the counter does not exist, one is created with value 0.
protected Long	addLongValue(Object name, long inc) Increment the given counter by the given incremental value If the counter does not exist, one is created with value 0.
void	configure(JobConf job) Initializes a new instance from a JobConf.
protected Double	getDoubleValue(Object name)
protected Long	getLongValue(Object name)
protected String	getReport() log the counters
protected void	report() log the counters
protected void	setDoubleValue(Object name, double value) Set the given counter to the given value
protected void	setLongValue(Object name, long value) Set the given counter to the given value

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.hadoop.mapred.Mapper

map

Methods inherited from interface org.apache.hadoop.mapred.Reducer

reduce

Methods inherited from interface java.io.Closeable

close

Field Detail

LOG

public static final org.apache.commons.logging.Log LOG

Constructor Detail

JobBase

public JobBase()

Method Detail

setLongValue

protected void setLongValue(Object name,
                            long value)

Set the given counter to the given value

Parameters:

name - the counter name

value - the value for the counter

setDoubleValue

protected void setDoubleValue(Object name,
                              double value)

Set the given counter to the given value

Parameters:

name - the counter name

value - the value for the counter

getLongValue

protected Long getLongValue(Object name)

Parameters:

name - the counter name

Returns:

return the value of the given counter.

getDoubleValue

protected Double getDoubleValue(Object name)

Parameters:

name - the counter name

Returns:

return the value of the given counter.

addLongValue

protected Long addLongValue(Object name,
                            long inc)

Increment the given counter by the given incremental value If the counter does not exist, one is created with value 0.

Parameters:

name - the counter name

inc - the incremental value

Returns:

the updated value.

addDoubleValue

protected Double addDoubleValue(Object name,
                                double inc)

Increment the given counter by the given incremental value If the counter does not exist, one is created with value 0.

Parameters:

name - the counter name

inc - the incremental value

Returns:

the updated value.

report

protected void report()

log the counters

getReport

protected String getReport()

log the counters

configure

public void configure(JobConf job)

Initializes a new instance from a JobConf.

Specified by:

configure in interface JobConfigurable

Parameters:

job - the configuration