Java Doc for SingleRemoveSynchronizedAddLock.java in  » Sevlet-Container » apache-tomcat-6.0.14 » org » apache » catalina » tribes » transport » bio » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Sevlet Container » apache tomcat 6.0.14 » org.apache.catalina.tribes.transport.bio.util   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    org.apache.catalina.tribes.transport.bio.util.SingleRemoveSynchronizedAddLock SingleRemoveSynchronizedAddLock public class SingleRemoveSynchronizedAddLock (Code) The class SingleRemoveSynchronizedAddLock implement locking for accessing the queue by a single remove thread and multiple add threads. A thread is only allowed to be either the remove or an add thread. The lock can either be owned by the remove thread or by a single add thread. If the remove thread tries to get the lock, but the queue is empty, it will block (poll) until an add threads adds an entry to the queue and releases the lock. If the remove thread and add threads compete for the lock and an add thread releases the lock, then the remove thread will get the lock first. The remove thread removes all entries in the queue at once and proceeses them without further polling the queue. The lock is not reentrant, in the sense, that all threads must release an owned lock before competing for the lock again! author:    Rainer Jung author:    Peter Rossbach version:    1.1 Constructor Summary public   SingleRemoveSynchronizedAddLock()      public   SingleRemoveSynchronizedAddLock(boolean dataAvailable)      Method Summary public synchronized  void abortRemove()      public synchronized  long getAddWaitTimeout()      public synchronized  long getRemoveWaitTimeout()      public synchronized  boolean isAddLocked()      Check if an add thread owns the lock. public synchronized  boolean isDataAvailable()      Check if the locked object has data available i.e. public synchronized  boolean isRemoveLocked()      Check if the remove thread owns the lock. public synchronized  boolean isRemovePolling()      Check if the remove thread is polling. public synchronized  void lockAdd()      Acquires the lock by an add thread and sets the add flag. public synchronized  boolean lockRemove()      Acquires the lock by the remove thread and sets the remove flag. public synchronized  void setAddWaitTimeout(long timeout)      public synchronized  void setRemoveWaitTimeout(long timeout)      public synchronized  void unlockAdd(boolean dataAvailable)      Releases the lock by an add thread and reset the remove flag. public synchronized  void unlockRemove()      Releases the lock by the remove thread and reset the add flag. Constructor Detail SingleRemoveSynchronizedAddLock public SingleRemoveSynchronizedAddLock()(Code) SingleRemoveSynchronizedAddLock public SingleRemoveSynchronizedAddLock(boolean dataAvailable)(Code) Method Detail abortRemove public synchronized void abortRemove()(Code) Abort any polling remover thread getAddWaitTimeout public synchronized long getAddWaitTimeout()(Code) Value of addWaitTimeout getRemoveWaitTimeout public synchronized long getRemoveWaitTimeout()(Code) Value of removeWaitTimeout isAddLocked public synchronized boolean isAddLocked()(Code) Check if an add thread owns the lock. True iff an add thread owns the lock. isDataAvailable public synchronized boolean isDataAvailable()(Code) Check if the locked object has data available i.e. the remover can stop poling and get the lock. True iff the lock Object has data available. isRemoveLocked public synchronized boolean isRemoveLocked()(Code) Check if the remove thread owns the lock. True iff the remove thread owns the lock. isRemovePolling public synchronized boolean isRemovePolling()(Code) Check if the remove thread is polling. True iff the remove thread is polling. lockAdd public synchronized void lockAdd()(Code) Acquires the lock by an add thread and sets the add flag. If any add thread or the remove thread already acquired the lock this add thread will block until the lock is released. lockRemove public synchronized boolean lockRemove()(Code) Acquires the lock by the remove thread and sets the remove flag. If any add thread already acquired the lock or the queue is empty, the remove thread will block until the lock is released and the queue is not empty. setAddWaitTimeout public synchronized void setAddWaitTimeout(long timeout)(Code) Set value of addWaitTimeout setRemoveWaitTimeout public synchronized void setRemoveWaitTimeout(long timeout)(Code) Set value of removeWaitTimeout unlockAdd public synchronized void unlockAdd(boolean dataAvailable)(Code) Releases the lock by an add thread and reset the remove flag. If the reader thread is polling, notify it. unlockRemove public synchronized void unlockRemove()(Code) Releases the lock by the remove thread and reset the add flag. Notify all waiting add threads, that the lock has been released by the remove thread. 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)