Java Doc for TimestampSubscription.java in  » Science » Cougaar12_4 » org » cougaar » core » blackboard » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Science » Cougaar12_4 » org.cougaar.core.blackboard 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   org.cougaar.core.blackboard.Subscription
      org.cougaar.core.blackboard.TimestampSubscription

TimestampSubscription
public class TimestampSubscription extends Subscription (Code)
A Subscription that tracks UniqueObject publishAdd and most recent publishChange timestamps.

These timestamps are not persisted, and upon rehydration the creation time of the objects will be the agent restart time.
See Also:   Subscriber
See Also:    required system property that must be enabled
See Also:   TimestampSubscription.getTimestampEntry
See Also:    access to the (UID, TimestampEntry) timestamp data




Constructor Summary
public  TimestampSubscription(UnaryPredicate p)
     Equivalent tonew TimestampSubscription(p, true).
public  TimestampSubscription(UnaryPredicate p, boolean isShared)
    

Method Summary
public  booleanapply(Envelope envelope)
    
public  longgetCreationTime(UID uid)
    
public  longgetModificationTime(UID uid)
    
public  TimestampEntrygetTimestampEntry(UID uid)
     Get the TimestampEntry for the local blackboard object with the given UID.

The object must match this subscription's predicate.

The timestamps are measured in milliseconds, and matches the transaction close times of the subscriber that performed the "publishAdd()" or "publishChange()".

This method is thread-safe to allow multiple clients to access the underlying (UID, TimestampEntry) map.

protected  voidprivateAdd(Object o, boolean isVisible)
    
protected  voidprivateChange(Object o, List changes, boolean isVisible)
    
protected  voidprivateRemove(Object o, boolean isVisible)
    
protected  voidresetChanges()
    


Constructor Detail
TimestampSubscription
public TimestampSubscription(UnaryPredicate p)(Code)
Equivalent tonew TimestampSubscription(p, true).



TimestampSubscription
public TimestampSubscription(UnaryPredicate p, boolean isShared)(Code)

Parameters:
  p - the predicate should only accept UniqueObjects; all non-UniqueObjects and UniqueObjects with null UIDs are ignored.
Parameters:
  isShared - if true, removals are done immediately,otherwise they are done at the end of the plugin'stransaction.




Method Detail
apply
public boolean apply(Envelope envelope)(Code)



getCreationTime
public long getCreationTime(UID uid)(Code)

See Also:   TimestampSubscription.getTimestampEntry
See Also:    get the creation time



getModificationTime
public long getModificationTime(UID uid)(Code)

See Also:   TimestampSubscription.getTimestampEntry
See Also:    get the modification time



getTimestampEntry
public TimestampEntry getTimestampEntry(UID uid)(Code)
Get the TimestampEntry for the local blackboard object with the given UID.

The object must match this subscription's predicate.

The timestamps are measured in milliseconds, and matches the transaction close times of the subscriber that performed the "publishAdd()" or "publishChange()".

This method is thread-safe to allow multiple clients to access the underlying (UID, TimestampEntry) map. The map is also updated during the subscriber's transaction. Multiple calls to "getTimestampEntry()", even within the same subscriber transaction, may return different results. the TimestampEntry, or null if not known.




privateAdd
protected void privateAdd(Object o, boolean isVisible)(Code)



privateChange
protected void privateChange(Object o, List changes, boolean isVisible)(Code)



privateRemove
protected void privateRemove(Object o, boolean isVisible)(Code)



resetChanges
protected void resetChanges()(Code)



Fields inherited from org.cougaar.core.blackboard.Subscription
protected boolean myHasChanged(Code)(Java Doc)
final protected UnaryPredicate predicate(Code)(Java Doc)
protected Subscriber subscriber(Code)(Java Doc)

Methods inherited from org.cougaar.core.blackboard.Subscription
public boolean apply(Envelope envelope)(Code)(Java Doc)
final protected void checkTransactionOK(String s)(Code)(Java Doc)
boolean conditionalAdd(Object o, boolean isVisible)(Code)(Java Doc)
boolean conditionalChange(Object o, List changes, boolean isVisible)(Code)(Java Doc)
boolean conditionalRemove(Object o, boolean isVisible)(Code)(Java Doc)
public void fill(Envelope envelope)(Code)(Java Doc)
public String getName()(Code)(Java Doc)
final public Subscriber getSubscriber()(Code)(Java Doc)
final public boolean hasChanged()(Code)(Java Doc)
abstract protected void privateAdd(Object o, boolean isVisible)(Code)(Java Doc)
final protected boolean privateApply(Envelope envelope)(Code)(Java Doc)
abstract protected void privateChange(Object o, List changes, boolean isVisible)(Code)(Java Doc)
abstract protected void privateRemove(Object o, boolean isVisible)(Code)(Java Doc)
protected void resetChanges()(Code)(Java Doc)
final protected void setChanged(boolean changed)(Code)(Java Doc)
final void setIsInitialized()(Code)(Java Doc)
final void setSubscriber(Subscriber s)(Code)(Java Doc)
final protected void subscriberSignalExternalActivity()(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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