com.quadrique.jbuildingblocks.core.process
Class JbbProcessMemoryWatchdog

java.lang.Object
  java.lang.Thread
      com.quadrique.jbuildingblocks.core.process.JbbProcessMemoryWatchdog

All Implemented Interfaces:

Runnable

public class JbbProcessMemoryWatchdog
extends Thread

This thread keeps track of the memory consumption of the current process and it makes sure that the Garbage collector is called.

Nested Class Summary

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

Thread.State, Thread.UncaughtExceptionHandler

Field Summary

static int	POLICY_IS_CALL_GC_FOR_EACH_DELTA_T
static int	POLICY_IS_CALL_GC_IF_FREE_MEMORY_DELTA_IS_LESS_THAN_THRESHOLD
static int	POLICY_IS_CALL_GC_IF_FREE_MEMORY_IS_LESS_THAN_THRESHOLD
static int	POLICY_IS_CALL_GC_IF_MEMORY_USED_DELTA_IS_ABOVE_THRESHOLD
static int	POLICY_IS_CALL_GC_IF_MEMORY_USED_IS_ABOVE_THRESHOLD

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

JbbProcessMemoryWatchdog(int zPollingInterval, int zPolicy, int zThreshold)
constructor

Method Summary

void	run()
void	stopExecution()

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

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

POLICY_IS_CALL_GC_FOR_EACH_DELTA_T

public static final int POLICY_IS_CALL_GC_FOR_EACH_DELTA_T

See Also:

Constant Field Values

POLICY_IS_CALL_GC_IF_MEMORY_USED_IS_ABOVE_THRESHOLD

public static final int POLICY_IS_CALL_GC_IF_MEMORY_USED_IS_ABOVE_THRESHOLD

See Also:

Constant Field Values

POLICY_IS_CALL_GC_IF_MEMORY_USED_DELTA_IS_ABOVE_THRESHOLD

public static final int POLICY_IS_CALL_GC_IF_MEMORY_USED_DELTA_IS_ABOVE_THRESHOLD

See Also:

Constant Field Values

POLICY_IS_CALL_GC_IF_FREE_MEMORY_IS_LESS_THAN_THRESHOLD

public static final int POLICY_IS_CALL_GC_IF_FREE_MEMORY_IS_LESS_THAN_THRESHOLD

See Also:

Constant Field Values

POLICY_IS_CALL_GC_IF_FREE_MEMORY_DELTA_IS_LESS_THAN_THRESHOLD

public static final int POLICY_IS_CALL_GC_IF_FREE_MEMORY_DELTA_IS_LESS_THAN_THRESHOLD

See Also:

Constant Field Values

Constructor Detail

JbbProcessMemoryWatchdog

public JbbProcessMemoryWatchdog(int zPollingInterval,
                                int zPolicy,
                                int zThreshold)
                         throws Exception

constructor

Parameters:

zPolicy - POLICY_IS_CALL_GC_FOR_EACH_DELTA_T to call the GC at regular interval, POLICY_IS_CALL_GC_IF_MEMORY_USED_IS_ABOVE_THRESHOLD...

zPollingInterval - the polling interval in number of seconds (> 60s)

zThreshold - use 0 if zPolicy is POLICY_IS_CALL_GC_FOR_EACH_DELTA_T, the threshold value in number of bytes otherwise

Throws:

Exception

Method Detail

run

public void run()

Specified by:

run in interface Runnable

Overrides:

run in class Thread

stopExecution

public void stopExecution()