Package org.apache.hadoop.mapred.gridmix

Class Statistics

java.lang.Object

org.apache.hadoop.mapred.gridmix.Statistics

public class Statistics
extends java.lang.Object

Component collecting the stats required by other components to make decisions. Single thread collector tries to collect the stats (currently cluster stats) and caches it internally. Components interested in these stats need to register themselves and will get notified either on every job completion event or some fixed time interval.

Field Summary

Fields

Modifier and Type	Field	Description
static org.slf4j.Logger	LOG

Constructor Summary

Constructors

Constructor	Description
Statistics(org.apache.hadoop.conf.Configuration conf, int pollingInterval, java.util.concurrent.CountDownLatch startFlag)

Method Summary

Modifier and Type	Method	Description
void	abort()
void	add(org.apache.hadoop.mapred.gridmix.Statistics.JobStats job)	Used by JobMonitor to add the completed job.
void	addClusterStatsObservers(org.apache.hadoop.mapred.gridmix.StatListener<org.apache.hadoop.mapred.gridmix.Statistics.ClusterStats> listener)
void	addJobStats(org.apache.hadoop.mapred.gridmix.Statistics.JobStats stats)	Add a submitted job for monitoring.
void	addJobStatsListeners(org.apache.hadoop.mapred.gridmix.StatListener<org.apache.hadoop.mapred.gridmix.Statistics.JobStats> listener)
static org.apache.hadoop.mapred.gridmix.Statistics.JobStats	generateJobStats(org.apache.hadoop.mapreduce.Job job, org.apache.hadoop.tools.rumen.JobStory jobdesc)	Generates a job stats.
void	join(long millis)	Wait until the service completes.
void	shutdown()
void	start()	Attempt to start the service.

Methods inherited from class java.lang.Object

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

Field Detail

LOG

public static final org.slf4j.Logger LOG

Constructor Detail

Statistics

public Statistics(org.apache.hadoop.conf.Configuration conf,
                  int pollingInterval,
                  java.util.concurrent.CountDownLatch startFlag)
           throws java.io.IOException,
                  java.lang.InterruptedException

Throws:

java.io.IOException

java.lang.InterruptedException

Method Detail

generateJobStats

public static org.apache.hadoop.mapred.gridmix.Statistics.JobStats generateJobStats(org.apache.hadoop.mapreduce.Job job,
                                                                                    org.apache.hadoop.tools.rumen.JobStory jobdesc)

Generates a job stats.

addJobStats

public void addJobStats(org.apache.hadoop.mapred.gridmix.Statistics.JobStats stats)

Add a submitted job for monitoring.

add

public void add(org.apache.hadoop.mapred.gridmix.Statistics.JobStats job)

Used by JobMonitor to add the completed job.

addClusterStatsObservers

public void addClusterStatsObservers(org.apache.hadoop.mapred.gridmix.StatListener<org.apache.hadoop.mapred.gridmix.Statistics.ClusterStats> listener)

addJobStatsListeners

public void addJobStatsListeners(org.apache.hadoop.mapred.gridmix.StatListener<org.apache.hadoop.mapred.gridmix.Statistics.JobStats> listener)

start

public void start()

Attempt to start the service.

join

public void join(long millis)
          throws java.lang.InterruptedException

Wait until the service completes. It is assumed that either a shutdown or abort() has been requested.

Throws:

java.lang.InterruptedException

shutdown

public void shutdown()

abort

public void abort()