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Java Source Code / Java Documentation » Portal » Open Portal » com.sun.portal.search.autoclassify 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   java.lang.Thread
      com.sun.portal.search.autoclassify.HeartBeat

HeartBeat
public class HeartBeat extends Thread (Code)

Title: HeartBeat

Description: This object is used to simulate using pid to avoid multiple instance running in native program. A heartbeat will periodically touch his lockfile. A new heartbeat object with same lockfile will exame the existence of the lockfile when it was constructed. If the lockfile was exist, it will exame the lastmodified of the file with two beattime period. When the timestamp got changed, it will throw exception. Otherwise it will take over the ownership of the lockfile.

Copyright: Copyright (c) 2002

Company: Sun Microsystems


author:
   Allen Chiang
version:
   1.0


Field Summary
public static  longbeatTime
     A default beattime.

Constructor Summary
public  HeartBeat(String lockFileName)
    

Method Summary
public  voidStop()
    
public  voidrun()
    

Field Detail
beatTime
public static long beatTime(Code)
A default beattime. Default to 5 seconds.




Constructor Detail
HeartBeat
public HeartBeat(String lockFileName) throws HeartBeatFailureException(Code)
Create a heartbeat action by given lockfile
Parameters:
  lockFileName - A lockfile used in this heartbeat object
throws:
  Exception - Exception caused by opening the lockfile or another heartbeat is running on thelockfile.




Method Detail
Stop
public void Stop()(Code)
Stop the heartbeat action



run
public void run()(Code)
Start the heartbeat action



Fields inherited from java.lang.Thread
final public static int MAX_PRIORITY(Code)(Java Doc)
final public static int MIN_PRIORITY(Code)(Java Doc)
final public static int NORM_PRIORITY(Code)(Java Doc)

Methods inherited from java.lang.Thread
public static int activeCount()(Code)(Java Doc)
final public void checkAccess()(Code)(Java Doc)
native public int countStackFrames()(Code)(Java Doc)
native public static Thread currentThread()(Code)(Java Doc)
public void destroy()(Code)(Java Doc)
public static void dumpStack()(Code)(Java Doc)
public static int enumerate(Thread tarray)(Code)(Java Doc)
public static Map<Thread, StackTraceElement[]> getAllStackTraces()(Code)(Java Doc)
public ClassLoader getContextClassLoader()(Code)(Java Doc)
public static UncaughtExceptionHandler getDefaultUncaughtExceptionHandler()(Code)(Java Doc)
public long getId()(Code)(Java Doc)
final public String getName()(Code)(Java Doc)
final public int getPriority()(Code)(Java Doc)
public StackTraceElement[] getStackTrace()(Code)(Java Doc)
public State getState()(Code)(Java Doc)
final public ThreadGroup getThreadGroup()(Code)(Java Doc)
public UncaughtExceptionHandler getUncaughtExceptionHandler()(Code)(Java Doc)
native public static boolean holdsLock(Object obj)(Code)(Java Doc)
public void interrupt()(Code)(Java Doc)
public static boolean interrupted()(Code)(Java Doc)
final native public boolean isAlive()(Code)(Java Doc)
final public boolean isDaemon()(Code)(Java Doc)
public boolean isInterrupted()(Code)(Java Doc)
final public synchronized void join(long millis) throws InterruptedException(Code)(Java Doc)
final public synchronized void join(long millis, int nanos) throws InterruptedException(Code)(Java Doc)
final public void join() throws InterruptedException(Code)(Java Doc)
final public void resume()(Code)(Java Doc)
public void run()(Code)(Java Doc)
public void setContextClassLoader(ClassLoader cl)(Code)(Java Doc)
final public void setDaemon(boolean on)(Code)(Java Doc)
public static void setDefaultUncaughtExceptionHandler(UncaughtExceptionHandler eh)(Code)(Java Doc)
final public void setName(String name)(Code)(Java Doc)
final public void setPriority(int newPriority)(Code)(Java Doc)
public void setUncaughtExceptionHandler(UncaughtExceptionHandler eh)(Code)(Java Doc)
native public static void sleep(long millis) throws InterruptedException(Code)(Java Doc)
public static void sleep(long millis, int nanos) throws InterruptedException(Code)(Java Doc)
public synchronized void start()(Code)(Java Doc)
final public void stop()(Code)(Java Doc)
final public synchronized void stop(Throwable obj)(Code)(Java Doc)
final public void suspend()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
native public static void yield()(Code)(Java Doc)

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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