Java Doc for WatchedControllers.java in  » Database-JDBC-Connection-Pool » sequoia-2.10.9 » org » continuent » sequoia » driver » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database JDBC Connection Pool » sequoia 2.10.9 » org.continuent.sequoia.driver   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    org.continuent.sequoia.driver.WatchedControllers WatchedControllers public class WatchedControllers (Code) Provides a list of controllers and maintains their state (up or down), launching appropriatly methods from callback given callback instance. To each controller is associated a lastTimeSeen value corresponding to the last time the controller responded to a ping. Their state is updated each time the lastTimeSeen value is accessed (read or written). At init time, all controllers are considered as up (responding to pings). Controllers can also be forced as 'no more responding to pings' (ie. down) author:    Gilles Rayrat version:    1.0 Field Summary final  HashMap allControllersAndStates       ControllerStateChangedCallback callback       int controllerTimeout      Constructor Summary public   WatchedControllers(ControllerInfo[] controllers, long initTime, int controllerTimeout, ControllerStateChangedCallback callback)      Method Summary public  void addController(ControllerInfo controller, int index, long lastTimeSeen)      final public  Iterator getControllerIterator()      Returns a 'safe' read-only iterator on controllers' ControllerInfo. Creates a copy of the controller hashmap keys and returns a iterator on it. public  int getOriginalIndexOf(ControllerInfo controller)      public  void lookForDeadControllers(long currentTime)      Updates all controllers state according to the given time. Iterates through the controller list and (if the controller was not already considered as down) if the lastTimeSeen value is older than the given time minus WatchedControllers.controllerTimeout , the controller will the be considered as failing, and ControllerStateChangedCallback.onControllerDown(ControllerInfo) will be called. public  void removeController(ControllerInfo controller)      public synchronized  void setControllerDown(ControllerInfo ctrl)      Forces the given controller to be considered as down. If the given controller was already down, does nothing. public  void setControllerResponsed(ControllerInfo ctrl, long newTime)      public  String toString()      Field Detail allControllersAndStates final HashMap allControllersAndStates(Code) All controllers with their corresponding state callback ControllerStateChangedCallback callback(Code) Actions to take when a controller goes down or back-alive controllerTimeout int controllerTimeout(Code) Delay after which a controller will be considered as failing if it did not respond to pings Constructor Detail WatchedControllers public WatchedControllers(ControllerInfo[] controllers, long initTime, int controllerTimeout, ControllerStateChangedCallback callback)(Code) Creates a new list of watched controllers with the given list of controllers and an initial lastTimeSeen value. Parameters:   controllers - list of all controllers identified by theirControllerInfo Parameters:   initTime - initial lastTimeSeen value, typicallySystem.currentTimeMillis() Parameters:   callback - Callback implementation to call when a controller statechanges Parameters:   controllerTimeout - delay after which a controller will be consideredas failing if it did not respond to pings Method Detail addController public void addController(ControllerInfo controller, int index, long lastTimeSeen)(Code) NOT IMPLEMENTED YET Adds a controller to the list and associates the given lastTimeSeenValue to it. Note that this function is not used for now, but is present for future dynamic controller addition This operation is thread-safe, thus can slow-down other concurrent operations like WatchedControllers.removeController(ControllerInfo) , WatchedControllers.setControllerResponsed(ControllerInfo,long) , getControllerIterator final public Iterator getControllerIterator()(Code) Returns a 'safe' read-only iterator on controllers' ControllerInfo. Creates a copy of the controller hashmap keys and returns a iterator on it. This way, the iterator will not be affected by hashmap operations getOriginalIndexOf public int getOriginalIndexOf(ControllerInfo controller)(Code) Returns the given controllers index in the original list Parameters:   controller - the controller to get index of original index of the given controller lookForDeadControllers public void lookForDeadControllers(long currentTime)(Code) Updates all controllers state according to the given time. Iterates through the controller list and (if the controller was not already considered as down) if the lastTimeSeen value is older than the given time minus WatchedControllers.controllerTimeout , the controller will the be considered as failing, and ControllerStateChangedCallback.onControllerDown(ControllerInfo) will be called. removeController public void removeController(ControllerInfo controller)(Code) NOT IMPLEMENTED YET Removes the selected controller from the list of controllers to watch Parameters:   controller - controller to remove See Also:   WatchedControllers.addController(ControllerInfo,long) setControllerDown public synchronized void setControllerDown(ControllerInfo ctrl)(Code) Forces the given controller to be considered as down. If the given controller was already down, does nothing. Otherwise, marks it as dead and calls ControllerStateChangedCallback.onControllerDown(ControllerInfo) setControllerResponsed public void setControllerResponsed(ControllerInfo ctrl, long newTime)(Code) Associates given lastTimeSeen value to specified controller and update its state: if the controller was considered as down, calls the ControllerStateChangedCallback.onControllerUp(ControllerInfo) See Also:   ControllerStateChangedCallback toString public String toString()(Code) 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)