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Java Source Code / Java Documentation » Cache » OSCache » com.opensymphony.oscache.base   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    com.opensymphony.oscache.base.EntryUpdateState EntryUpdateState public class EntryUpdateState (Code) Holds the state of a Cache Entry that is in the process of being (re)generated. This is not synchronized; the synchronization must be handled by the calling classes. author:    Chris Miller author:    Author: $ version:    Revision: $ Field Summary final public static  int NOT_YET_UPDATING      final public static  int UPDATE_CANCELLED      final public static  int UPDATE_COMPLETE      final public static  int UPDATE_IN_PROGRESS       int state      Method Summary public  int cancelUpdate()      Updates the state to UPDATE_CANCELLED. public  int completeUpdate()      Updates the state to UPDATE_COMPLETE. public synchronized  int decrementUsageCounter()      Decrements the usage counter by one. public synchronized  int getUsageCounter()      public synchronized  int incrementUsageCounter()      public  boolean isAwaitingUpdate()      This is the initial state when an instance this object is first created. public  boolean isCancelled()      The thread that was responsible for updating the cache entry (ie, the thread that managed to grab the update lock) has decided to give up responsibility for performing the update. public  boolean isComplete()      The update of the cache entry has been completed. public  boolean isUpdating()      The cache entry is currently being generated by the thread that got hold of the update lock. public  int startUpdate()      Attempt to change the state to UPDATE_IN_PROGRESS. Field Detail NOT_YET_UPDATING final public static int NOT_YET_UPDATING(Code) The initial state when this object is first created UPDATE_CANCELLED final public static int UPDATE_CANCELLED(Code) Update cancelled state UPDATE_COMPLETE final public static int UPDATE_COMPLETE(Code) Update complete state UPDATE_IN_PROGRESS final public static int UPDATE_IN_PROGRESS(Code) Update in progress state state int state(Code) Current update state Method Detail cancelUpdate public int cancelUpdate()(Code) Updates the state to UPDATE_CANCELLED. This should only be called by the thread that managed to get the update lock. the counter value after the operation completed completeUpdate public int completeUpdate()(Code) Updates the state to UPDATE_COMPLETE. This should only be called by the thread that managed to get the update lock. the counter value after the operation completed decrementUsageCounter public synchronized int decrementUsageCounter()(Code) Decrements the usage counter by one. This method may only be called when the usage number is greater than zero the counter value after the decrement getUsageCounter public synchronized int getUsageCounter()(Code) Gets the current usage counter value a positive number. incrementUsageCounter public synchronized int incrementUsageCounter()(Code) Increments the usage counter by one the counter value after the increment isAwaitingUpdate public boolean isAwaitingUpdate()(Code) This is the initial state when an instance this object is first created. It indicates that a cache entry needs updating, but no thread has claimed responsibility for updating it yet. isCancelled public boolean isCancelled()(Code) The thread that was responsible for updating the cache entry (ie, the thread that managed to grab the update lock) has decided to give up responsibility for performing the update. OSCache will notify any other threads that are waiting on the update so one of them can take over the responsibility. isComplete public boolean isComplete()(Code) The update of the cache entry has been completed. isUpdating public boolean isUpdating()(Code) The cache entry is currently being generated by the thread that got hold of the update lock. startUpdate public int startUpdate()(Code) Attempt to change the state to UPDATE_IN_PROGRESS. Calls to this method must be synchronized on the EntryUpdateState instance. the counter value after the operation completed 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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