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Java Source Code / Java Documentation » Net » Terracotta » com.tc.process

Source Cross Reference Class Diagram Java Document (Java Doc)

java.lang .Object

com.tc.process .LinkedJavaProcessPollingAgent

LinkedJavaProcessPollingAgent

final public class LinkedJavaProcessPollingAgent (Code)

Creates a connection between a parent java process and it's child process.

SCENARIO: When a parent process creates a child the parent may monitor the child using various hooks. If the parent process itself dies unexpectedly (kill -9) the child process will remain alive unaware of it's parents fate.

This class is able to create a server thread on the parent and a watchdog thread on the child which periodically pages it's parent to make sure it's still alive. If the parent's heartbeat flatlines, the child's watchdog thread will call System.exit(0).

Method Summary
public static synchronized int	getChildProcessHeartbeatServerPort() Creates a server thread in the parent process posting a periodic heartbeat.
public static synchronized boolean	isAnyAppServerAlive()
public static synchronized boolean	isServerRunning()
static void	reallySleep(long millis)
public static synchronized void	shutdown()
public static synchronized void	startClientWatchdogService(int pingPort, String childClass, boolean honorShutdownMsg) Creates a watchdog service thread in the child process which receives a heartbeart from the parent process.
public static synchronized void	startClientWatchdogService(int pingPort, String childClass)
public static synchronized void	startHeartBeatServer()

Method Detail

getChildProcessHeartbeatServerPort
public static synchronized int getChildProcessHeartbeatServerPort()(Code)
	Creates a server thread in the parent process posting a periodic heartbeat. server port - must be passed to startClientWatchdogService()

isAnyAppServerAlive
public static synchronized boolean isAnyAppServerAlive()(Code)

isServerRunning
public static synchronized boolean isServerRunning()(Code)

reallySleep
static void reallySleep(long millis)(Code)

shutdown
public static synchronized void shutdown()(Code)
	Shutdown heartbeat server and send a kill signal to child processes

startClientWatchdogService
public static synchronized void startClientWatchdogService(int pingPort, String childClass, boolean honorShutdownMsg)(Code)
	Creates a watchdog service thread in the child process which receives a heartbeart from the parent process. Parameters: pingPort - - this must come from getChildProcessHeartbeatServerPort() Parameters: childClass - - used for debugging Parameters: honorShutdownMsg - - false, will ignore the destroy() method and keep this client alive after the shutdownmessage is broadcast

startClientWatchdogService
public static synchronized void startClientWatchdogService(int pingPort, String childClass)(Code)

startHeartBeatServer
public static synchronized void startHeartBeatServer()(Code)

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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