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Java Source Code / Java Documentation » Science » javolution 5.2 » javolution.context 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   javolution.context.Context
      javolution.context.PersistentContext

PersistentContext
public class PersistentContext extends Context (Code)

This class represents a context persistent accross multiple program executions. It is typically used to hold Reference persistent references .

How this context is loaded/saved is application specific. Although, the simplest way is to use Javolution XML serialization facility. For example:[code] import javolution.xml.XMLObjectReader; import javolution.xml.XMLObjectWriter; public void main(String[]) { // Loads persistent context (typically at start-up). XMLObjectReader reader = XMLObjectReader.newInstance(new FileInputStream("C:/persistent.xml")); PersistentContext.setCurrent(reader.read(PersistentContext.class)); ... ... // Saves persistent context for future execution. XMLObjectWriter writer = XMLObjectWriter.newInstance(new FileOutputStream("C:/persistent.xml")); writer.write(PersistentContext.getCurrent(), PersistentContext.class); }[/code]


author:
   Jean-Marie Dautelle
version:
   4.2, December 31, 2006

Inner Class :public static class Reference implements javolution.lang.Reference


Constructor Summary
public  PersistentContext()
     Default constructor.

Method Summary
protected  voidenterAction()
     Throws UnsupportedOperationException persistent context are global to all threads (singleton).
protected  voidexitAction()
     Throws UnsupportedOperationException persistent context are global to all threads (singleton).
public static  ContextgetCurrent()
     Returns the persistent context instance (singleton).
public  MapgetIdToValue()
     Returns the ID to value mapping for this persistent context.
public static  voidsetCurrent(PersistentContext ctx)
     Sets the persistent instance.


Constructor Detail
PersistentContext
public PersistentContext()(Code)
Default constructor.




Method Detail
enterAction
protected void enterAction()(Code)
Throws UnsupportedOperationException persistent context are global to all threads (singleton).



exitAction
protected void exitAction()(Code)
Throws UnsupportedOperationException persistent context are global to all threads (singleton).



getCurrent
public static Context getCurrent()(Code)
Returns the persistent context instance (singleton). the persistent context instance.



getIdToValue
public Map getIdToValue()(Code)
Returns the ID to value mapping for this persistent context. the persistent value indexed by identifiers.



setCurrent
public static void setCurrent(PersistentContext ctx)(Code)
Sets the persistent instance.
Parameters:
  ctx - the persistent instance.



Fields inherited from javolution.context.Context
final public static Context ROOT(Code)(Java Doc)

Methods inherited from javolution.context.Context
final public static Context enter(Context context)(Code)(Java Doc)
final public static Context enter(Class contextType)(Code)(Java Doc)
abstract protected void enterAction()(Code)(Java Doc)
public static Context exit()(Code)(Java Doc)
final public static void exit(Context ctx)(Code)(Java Doc)
abstract protected void exitAction()(Code)(Java Doc)
final AllocatorContext getAllocatorContext()(Code)(Java Doc)
public static Context getCurrent()(Code)(Java Doc)
final public Context getOuter()(Code)(Java Doc)
final public Thread getOwner()(Code)(Java Doc)
protected static void setCurrent(ConcurrentContext context)(Code)(Java Doc)
public String toString()(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)

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