Java Doc for WikiBackgroundThread.java in  » Wiki-Engine » JSPWiki » com » ecyrd » jspwiki » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Wiki Engine » JSPWiki » com.ecyrd.jspwiki.util   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    java.lang.Thread       com.ecyrd.jspwiki.util.WikiBackgroundThread All known Subclasses:   com.ecyrd.jspwiki.rss.RSSThread, WikiBackgroundThread abstract public class WikiBackgroundThread extends Thread implements WikiEventListener(Code) Abstract Thread subclass that operates in the background; when it detects the WikiEngineEvent.SHUTDOWN event, it terminates itself. Subclasses of this method need only implement the method WikiBackgroundThread.backgroundTask() , instead of the normal Thread.run , and provide a constructor that passes the WikiEngine and sleep interval. This class is thread-safe. author:    Andrew Jaquith Constructor Summary public   WikiBackgroundThread(WikiEngine engine, int sleepInterval)      Constructs a new instance of this background thread with a specified sleep interval, and adds the new instance to the wiki engine's event listeners. Method Summary final public  void actionPerformed(WikiEvent event)      Listens for com.ecyrd.jspwiki.event.WikiEngineEvent.SHUTDOWN and, if detected, marks the thread for death. abstract public  void backgroundTask()      Abstract method that performs the actual work for this background thread; subclasses must implement this method. public  WikiEngine getEngine()      Returns the WikiEngine that created this background thread. final public  void run()      Runs the background thread's WikiBackgroundThread.backgroundTask() method at the interval specified at construction. The thread will initially pause for a full sleep interval before starting, after which it will execute WikiBackgroundThread.startupTask() . public  void shutdown()      Requests the shutdown of this background thread. public  void shutdownTask()      Executes a task after shutdown signal was detected. public  void startupTask()      Executes a task just after the thread's Thread.run method starts, but before the WikiBackgroundThread.backgroundTask() task executes. Constructor Detail WikiBackgroundThread public WikiBackgroundThread(WikiEngine engine, int sleepInterval)(Code) Constructs a new instance of this background thread with a specified sleep interval, and adds the new instance to the wiki engine's event listeners. Parameters:   engine - the wiki engine Parameters:   sleepInterval - the interval between invocations ofthe thread's Thread.run method, in seconds Method Detail actionPerformed final public void actionPerformed(WikiEvent event)(Code) Listens for com.ecyrd.jspwiki.event.WikiEngineEvent.SHUTDOWN and, if detected, marks the thread for death. See Also:   com.ecyrd.jspwiki.event.WikiEventListener.actionPerformed(com.ecyrd.jspwiki.event.WikiEvent) backgroundTask abstract public void backgroundTask() throws Exception(Code) Abstract method that performs the actual work for this background thread; subclasses must implement this method. getEngine public WikiEngine getEngine()(Code) Returns the WikiEngine that created this background thread. the wiki engine run final public void run()(Code) Runs the background thread's WikiBackgroundThread.backgroundTask() method at the interval specified at construction. The thread will initially pause for a full sleep interval before starting, after which it will execute WikiBackgroundThread.startupTask() . This method will cleanly terminates the thread if the it has previously been marked for death, before which it will execute WikiBackgroundThread.shutdownTask() . If any of the three methods return an exception, it will be re-thrown as a com.ecyrd.jspwiki.InternalWikiException . See Also:   java.lang.Thread.run shutdown public void shutdown()(Code) Requests the shutdown of this background thread. Note that the shutdown is not immediate. since:    2.4.92 shutdownTask public void shutdownTask() throws Exception(Code) Executes a task after shutdown signal was detected. By default, this method does nothing; override it to implement custom functionality. startupTask public void startupTask() throws Exception(Code) Executes a task just after the thread's Thread.run method starts, but before the WikiBackgroundThread.backgroundTask() task executes. By default, this method does nothing; override it to implement custom functionality. 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)