ParkNPark.tests
Class FaultInjector

java.lang.Object
  java.lang.Thread
      ParkNPark.tests.FaultInjector

All Implemented Interfaces:

Runnable

public class FaultInjector
extends Thread

Fault injector background thread that injects random faults into the servers. This fault injector presently implements the following faults:

• Server killing
• Server database connection hosing

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Thread

Thread.State, Thread.UncaughtExceptionHandler

Field Summary

protected boolean	exit Our thread exit flag
protected int	faultInjectionMaxDelay The maximum delay of the fault injection in milliseconds
protected int	faultInjectionMinDelay The minimum delay of the fault injection in milliseconds
protected NameService	nameService Instance of our common name service management object

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

FaultInjector(NameService nameService, int faultInjectionMinDelay, int faultInjectionMaxDelay)
Creates a new fault injector using the given NameService helper object

Method Summary

void	beginExit() Tells this thread to begin its graceful shutdown
void	run() Runs the fault injector

Methods inherited from class java.lang.Thread

activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getAllStackTraces, getContextClassLoader, getDefaultUncaughtExceptionHandler, getId, getName, getPriority, getStackTrace, getState, getThreadGroup, getUncaughtExceptionHandler, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setDefaultUncaughtExceptionHandler, setName, setPriority, setUncaughtExceptionHandler, 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

nameService

protected NameService nameService

Instance of our common name service management object

exit

protected boolean exit

Our thread exit flag

faultInjectionMinDelay

protected int faultInjectionMinDelay

The minimum delay of the fault injection in milliseconds

faultInjectionMaxDelay

protected int faultInjectionMaxDelay

The maximum delay of the fault injection in milliseconds

Constructor Detail

FaultInjector

public FaultInjector(NameService nameService,
                     int faultInjectionMinDelay,
                     int faultInjectionMaxDelay)

Creates a new fault injector using the given NameService helper object

Parameters:

nameService - The NameService helper object to query the running servers from

faultInjectionMinDelay - The minimum delay of the fault injector in milliseconds

faultInjectionMinDelay - The maximum delay of the fault injector in milliseconds

Method Detail

beginExit

public void beginExit()

Tells this thread to begin its graceful shutdown

run

public void run()

Runs the fault injector

Specified by:

run in interface Runnable

Overrides:

run in class Thread