com.sun.slamd.loadvariance
Class LoadVarianceTestJobClass

java.lang.Object
  java.lang.Thread
      com.sun.slamd.job.JobClass
          com.sun.slamd.loadvariance.LoadVarianceJobClass
              com.sun.slamd.loadvariance.LoadVarianceTestJobClass

All Implemented Interfaces:

java.lang.Runnable

public class LoadVarianceTestJobClass

extends LoadVarianceJobClass

This class defines a very simple SLAMD job that can be used to test load variance algorithms. It does not generate any actual load, but rather simply has each thread increment a counter at regular intervals so that the graph created from that statistic should have the desired appearance.

Field Summary

static java.lang.String

STAT_TRACKER_COUNTER_INCREMENTS The display name of the stat tracker that will be incremented to define the overall shape of the load definition.

Fields inherited from class com.sun.slamd.loadvariance.LoadVarianceJobClass

DEFAULT_IDLE_SLEEP_DURATION, PARAM_LOAD_DEFINITION

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

LoadVarianceTestJobClass()
The default constructor used to create a new instance of the search thread.

Method Summary

void	doProcessing() Performs the actual processing for this job.
void	doShutdown() Performs any processing that should be done at the very end of execution after all actual processing has completed.
void	doStartup() Performs any processing that should be done at the very beginning of execution before any actual processing is performed.
java.lang.String	getJobCategoryName() Retrieves the name of the category in which this job class exists.
java.lang.String	getJobDescription() Retrieves a description of the job performed by this job thread.
java.lang.String	getJobName() Retrieves the name of the job performed by this job thread.
ParameterList	getParameterStubs() Retrieve a parameter list that can be used to determine all of the customizeable options that are available for this job.
StatTracker[]	getStatTrackers() Retrieves the stat trackers that are maintained for this job thread.
StatTracker[]	getStatTrackerStubs(java.lang.String clientID, java.lang.String threadID, int collectionInterval) Retrieves the set of stat trackers that will be maintained by this job class.
void	initializeClient(java.lang.String clientID, ParameterList parameters) Initializes all of the instance variables that correspond to job parameters.
void	initializeThread(java.lang.String clientID, java.lang.String threadID, int collectionInterval, ParameterList parameters) Initializes this job thread to be used to actually run the job on the client.
void	validateJobInfo(int numClients, int threadsPerClient, int threadStartupDelay, java.util.Date startTime, java.util.Date stopTime, int duration, int collectionInterval, ParameterList parameters) Provides a means of validating the information used to schedule the job, including the scheduling information and list of parameters.

Methods inherited from class com.sun.slamd.loadvariance.LoadVarianceJobClass

getIdleSleepDuration, getVariableLoadParameterStub, initializeVariableLoad, loopVarianceDefinition, runJob, setIdleSleepDuration, setLoopVarianceDefinition, shouldPauseOrStop, validateLoadDefinition

Methods inherited from class com.sun.slamd.job.JobClass

destroy, enableRealTimeStats, finalizeClient, finalizeJob, finalizeThread, getActiveThreadCount, getClientID, getClientNumber, getClientSideJob, getClientSideParameterStubs, getCollectionInterval, getJobID, getScheduledDuration, getShouldStopTime, getStatReporter, getThreadID, getThreadNumber, indicateCompletedWithErrors, indicateStoppedDueToError, initializeJob, initializeJobThread, isDeprecated, isRunning, logMessage, overrideCollectionInterval, overrideNumClients, overrideThreadsPerClient, providesParameterTest, run, setClientNumber, setClientSideJob, setThreadNumber, shouldStop, stackTraceToString, startJob, stopAndWait, stopJob, stopRequested, testJobParameters, writeVerbose

Methods inherited from class java.lang.Thread

activeCount, checkAccess, countStackFrames, currentThread, dumpStack, enumerate, getContextClassLoader, getName, getPriority, getThreadGroup, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setName, setPriority, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

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

Field Detail

STAT_TRACKER_COUNTER_INCREMENTS

public static final java.lang.String STAT_TRACKER_COUNTER_INCREMENTS

The display name of the stat tracker that will be incremented to define the overall shape of the load definition.

See Also:

Constant Field Values

Constructor Detail

LoadVarianceTestJobClass

public LoadVarianceTestJobClass()

The default constructor used to create a new instance of the search thread. The only thing it should do is to invoke the superclass constructor. All other initialization should be performed in the initialize method.

Method Detail

getJobName

public java.lang.String getJobName()

Retrieves the name of the job performed by this job thread.

Specified by:

getJobName in class JobClass

Returns:

The name of the job performed by this job thread.

getJobDescription

public java.lang.String getJobDescription()

Retrieves a description of the job performed by this job thread.

Specified by:

getJobDescription in class JobClass

Returns:

A description of the job performed by this job thread.

getJobCategoryName

public java.lang.String getJobCategoryName()

Retrieves the name of the category in which this job class exists. This is used to help arrange the job classes in the administrative interface.

Overrides:

getJobCategoryName in class JobClass

Returns:

The name of the category in which this job class exists.

getParameterStubs

public ParameterList getParameterStubs()

Retrieve a parameter list that can be used to determine all of the customizeable options that are available for this job.

Specified by:

getParameterStubs in class JobClass

Returns:

A parameter list that can be used to determine all of the customizeable options that are available for this job.

getStatTrackerStubs

public StatTracker[] getStatTrackerStubs(java.lang.String clientID,
                                         java.lang.String threadID,
                                         int collectionInterval)

Retrieves the set of stat trackers that will be maintained by this job class. The stat trackers returned by this method do not have to actually contain any statistics -- the display name and stat tracker class should be the only information that callers of this method should rely upon. Note that this list can be different from the list of statistics actually collected by the job in some cases (e.g., if the job may not return all the stat trackers it advertises in all cases, or if the job may return stat trackers that it did not advertise), but it is a possibility that only the stat trackers returned by this method will be accessible for some features in the SLAMD server.

Specified by:

getStatTrackerStubs in class JobClass

Parameters:

clientID - The client ID that should be used for the returned stat trackers.

threadID - The thread ID that should be used for the returned stat trackers.

collectionInterval - The collection interval that should be used for the returned stat trackers.

Returns:

The set of stat trackers that will be maintained by this job class.

getStatTrackers

public StatTracker[] getStatTrackers()

Retrieves the stat trackers that are maintained for this job thread.

Specified by:

getStatTrackers in class JobClass

Returns:

The stat trackers that are maintained for this job thread.

validateJobInfo

public void validateJobInfo(int numClients,
                            int threadsPerClient,
                            int threadStartupDelay,
                            java.util.Date startTime,
                            java.util.Date stopTime,
                            int duration,
                            int collectionInterval,
                            ParameterList parameters)
                     throws InvalidValueException

Provides a means of validating the information used to schedule the job, including the scheduling information and list of parameters.

Overrides:

validateJobInfo in class JobClass

Parameters:

numClients - The number of clients that should be used to run the job.

threadsPerClient - The number of threads that should be created on each client to run the job.

threadStartupDelay - The delay in milliseconds that should be used when starting the client threads.

startTime - The time that the job should start running.

stopTime - The time that the job should stop running.

duration - The maximum length of time in seconds that the job should be allowed to run.

collectionInterval - The collection interval that should be used when gathering statistics for the job.

parameters - The set of parameters provided to this job that can be used to customize its behavior.

Throws:

InvalidValueException - If the provided information is not appropriate for running this job.

initializeClient

public void initializeClient(java.lang.String clientID,
                             ParameterList parameters)
                      throws UnableToRunException

Initializes all of the instance variables that correspond to job parameters.

Overrides:

initializeClient in class JobClass

Parameters:

clientID - The client ID for the current client.

parameters - The set of parameters that have been defined for this job.

Throws:

UnableToRunException - If any part of the initialization fails.

initializeThread

public void initializeThread(java.lang.String clientID,
                             java.lang.String threadID,
                             int collectionInterval,
                             ParameterList parameters)
                      throws UnableToRunException

Initializes this job thread to be used to actually run the job on the client. The provided parameter list should be processed to customize the behavior of this job thread, and any other initialization that needs to be done in order for the job to run should be performed here as well.

Specified by:

initializeThread in class JobClass

Parameters:

clientID - The client ID for this job thread.

threadID - The thread ID for this job thread.

collectionInterval - The length of time in seconds to use as the statistics collection interval.

parameters - The set of parameters provided to this job that can be used to customize its behavior.

Throws:

UnableToRunException - If a problem occurs that prevents the thread from being able to run properly.

doStartup

public void doStartup()

Performs any processing that should be done at the very beginning of execution before any actual processing is performed. This should include starting all stat trackers for the job.

Specified by:

doStartup in class LoadVarianceJobClass

doShutdown

public void doShutdown()

Performs any processing that should be done at the very end of execution after all actual processing has completed. This should include stopping all stat trackers for the job.

Specified by:

doShutdown in class LoadVarianceJobClass

doProcessing

public void doProcessing()

Performs the actual processing for this job. It should periodically call the shouldPauseOrStop method and if it returns true then this method should exit.

Specified by:

doProcessing in class LoadVarianceJobClass