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Java Source Code / Java Documentation » Sevlet Container » apache tomcat 6.0.14 » org.apache.tomcat.util.threads   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    org.apache.tomcat.util.threads.ThreadPool ThreadPool public class ThreadPool (Code) A thread pool that is trying to copy the apache process management. Should we remove this in favor of Doug Lea's thread package? author:    Gal Shachor author:    Yoav Shapira Inner Class :public static class MonitorRunnable implements Runnable Inner Class :public static class ControlRunnable implements Runnable Inner Class :public static interface ThreadPoolListener Field Summary final public static  int MAX_SPARE_THREADS      final public static  int MAX_THREADS      final public static  int MAX_THREADS_MIN      final public static  int MIN_SPARE_THREADS      final public static  int WORK_WAIT_TIMEOUT      protected  int currentThreadCount      protected  int currentThreadsBusy      protected  boolean isDaemon      protected  Vector listeners      protected  int maxSpareThreads      protected  int maxThreads      protected  int minSpareThreads      protected  MonitorRunnable monitor      protected  String name      protected  ControlRunnable[] pool      protected  int sequence      Sequence. protected  boolean stopThePool      protected  int threadPriority      Thread priority. protected  Hashtable threads      The threads that are part of the pool. Constructor Summary public   ThreadPool()      Constructor. Method Summary public  void addThread(Thread t, ControlRunnable cr)      public  void addThreadPoolListener(ThreadPoolListener tpl)      protected  void adjustLimits()      protected synchronized  void checkSpareControllers()      Called by the monitor thread to harvest idle threads. public static  ThreadPool createThreadPool(boolean jmx)      Create a ThreadPool instance. Parameters:   jmx - UNUSED ThreadPool instance. public  int getCurrentThreadCount()      public  int getCurrentThreadsBusy()      public  boolean getDaemon()      public static  int getDebug()      public  int getMaxSpareThreads()      public  int getMaxThreads()      public  int getMinSpareThreads()      public  MonitorRunnable getMonitor()      public  String getName()      public  int getSequence()      public  String[] getThreadParam()      Return an array with the current "param" ( XXX better name ? ) of each thread. public  int getThreadPriority()      Returns the priority level of current and future threads in this pool. public  String[] getThreadStatus()      Return an array with the status of each thread. public  Enumeration getThreads()      public  int incSequence()      public  boolean isDaemon()       void log(String s)      protected synchronized  void notifyThreadEnd(ControlRunnable c)      Inform the pool that the specific thread finish. protected  void openThreads(int toOpen)      Create missing threads. public  void removeThread(Thread t)      protected synchronized  void returnController(ControlRunnable c)      Returns the thread to the pool. public  void run(Runnable r)      public  void runIt(ThreadPoolRunnable r)      Executes a given Runnable on a thread in the pool, block if needed. public  void setDaemon(boolean b)      The default is true - the created threads will be in daemon mode. public  void setMaxSpareThreads(int maxSpareThreads)      public  void setMaxThreads(int maxThreads)      public  void setMinSpareThreads(int minSpareThreads)      public  void setName(String name)      public synchronized  void setThreadPriority(int threadPriority)      Sets the thread priority for current and future threads in this pool. public synchronized  void shutdown()      public synchronized  void start()      public  String threadStatusString()      Debug display of the stage of each thread. Field Detail MAX_SPARE_THREADS final public static int MAX_SPARE_THREADS(Code) MAX_THREADS final public static int MAX_THREADS(Code) MAX_THREADS_MIN final public static int MAX_THREADS_MIN(Code) MIN_SPARE_THREADS final public static int MIN_SPARE_THREADS(Code) WORK_WAIT_TIMEOUT final public static int WORK_WAIT_TIMEOUT(Code) currentThreadCount protected int currentThreadCount(Code) currentThreadsBusy protected int currentThreadsBusy(Code) isDaemon protected boolean isDaemon(Code) listeners protected Vector listeners(Code) maxSpareThreads protected int maxSpareThreads(Code) maxThreads protected int maxThreads(Code) minSpareThreads protected int minSpareThreads(Code) monitor protected MonitorRunnable monitor(Code) name protected String name(Code) Name of the threadpool pool protected ControlRunnable[] pool(Code) sequence protected int sequence(Code) Sequence. stopThePool protected boolean stopThePool(Code) threadPriority protected int threadPriority(Code) Thread priority. threads protected Hashtable threads(Code) The threads that are part of the pool. Key is Thread, value is the ControlRunnable Constructor Detail ThreadPool public ThreadPool()(Code) Constructor. Method Detail addThread public void addThread(Thread t, ControlRunnable cr)(Code) addThreadPoolListener public void addThreadPoolListener(ThreadPoolListener tpl)(Code) adjustLimits protected void adjustLimits()(Code) checkSpareControllers protected synchronized void checkSpareControllers()(Code) Called by the monitor thread to harvest idle threads. createThreadPool public static ThreadPool createThreadPool(boolean jmx)(Code) Create a ThreadPool instance. Parameters:   jmx - UNUSED ThreadPool instance. If JMX support is requested, you need tocall register() in order to set a name. getCurrentThreadCount public int getCurrentThreadCount()(Code) getCurrentThreadsBusy public int getCurrentThreadsBusy()(Code) getDaemon public boolean getDaemon()(Code) getDebug public static int getDebug()(Code) getMaxSpareThreads public int getMaxSpareThreads()(Code) getMaxThreads public int getMaxThreads()(Code) getMinSpareThreads public int getMinSpareThreads()(Code) getMonitor public MonitorRunnable getMonitor()(Code) getName public String getName()(Code) getSequence public int getSequence()(Code) getThreadParam public String[] getThreadParam()(Code) Return an array with the current "param" ( XXX better name ? ) of each thread. This is typically the last request. The params of all threads getThreadPriority public int getThreadPriority()(Code) Returns the priority level of current and future threads in this pool. The priority getThreadStatus public String[] getThreadStatus()(Code) Return an array with the status of each thread. The status indicates the current request processing stage ( for tomcat ) or whatever the thread is doing ( if the application using TP provide this info ) The status of all threads getThreads public Enumeration getThreads()(Code) incSequence public int incSequence()(Code) isDaemon public boolean isDaemon()(Code) log void log(String s)(Code) notifyThreadEnd protected synchronized void notifyThreadEnd(ControlRunnable c)(Code) Inform the pool that the specific thread finish. Called by the ControlRunnable.run() when the runnable throws an exception. openThreads protected void openThreads(int toOpen)(Code) Create missing threads. Parameters:   toOpen - Total number of threads we'll have open removeThread public void removeThread(Thread t)(Code) returnController protected synchronized void returnController(ControlRunnable c)(Code) Returns the thread to the pool. Called by threads as they are becoming idel. run public void run(Runnable r)(Code) runIt public void runIt(ThreadPoolRunnable r)(Code) Executes a given Runnable on a thread in the pool, block if needed. setDaemon public void setDaemon(boolean b)(Code) The default is true - the created threads will be in daemon mode. If set to false, the control thread will not be daemon - and will keep the process alive. setMaxSpareThreads public void setMaxSpareThreads(int maxSpareThreads)(Code) setMaxThreads public void setMaxThreads(int maxThreads)(Code) setMinSpareThreads public void setMinSpareThreads(int minSpareThreads)(Code) setName public void setName(String name)(Code) setThreadPriority public synchronized void setThreadPriority(int threadPriority)(Code) Sets the thread priority for current and future threads in this pool. Parameters:   threadPriority - The new priority throws:   IllegalArgumentException - If the specifiedpriority is less than Thread.MIN_PRIORITY ormore than Thread.MAX_PRIORITY shutdown public synchronized void shutdown()(Code) Stop the thread pool start public synchronized void start()(Code) threadStatusString public String threadStatusString()(Code) Debug display of the stage of each thread. The return is html style, for display in the console ( it can be easily parsed too ). The thread status display 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)