Java Doc for DestinationLink.java in  » Science » Cougaar12_4 » org » cougaar » mts » base » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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


org.cougaar.mts.base.DestinationLink

All known Subclasses:   org.cougaar.mts.base.DestinationLinkDelegateImplBase,
DestinationLink
public interface DestinationLink (Code)
The fifth station for outgoing messages. Each LinkProtocol has its own DestinationLink implementation class. DestinationLinks are made by the protocols, acting as factories.

The previous station is DestinationQueue. If the protocol uses Java serialization, the next station is MessageWriter. If there is no serialization, MessageDeliverer on the receiving side is the next stop.
See Also:   LinkProtocol
See Also:   SendLink
See Also:   SendQueue
See Also:   Router
See Also:   DestinationQueue
See Also:   MessageWriter
See Also:   MessageReader
See Also:   MessageDeliverer
See Also:   ReceiveLink
See Also:   Javadoc contributions from George Mount.





Method Summary
 voidaddMessageAttributes(MessageAttributes attrs)
     Allows the DestinationLink to add attributes before forwarding the message.
 intcost(AttributedMessage message)
     This method returns a simple measure of the cost of sending the given message via the associated transport.
 MessageAttributesforwardMessage(AttributedMessage message)
     This method is used to request the associated transport to do its thing with the given message.
 MessageAddressgetDestination()
     Return the target/destination of this link.
 ClassgetProtocolClass()
    
 ObjectgetRemoteReference()
    
 booleanisValid()
     Is this link currently legitimate and functional? The default is true for loopback and would ordinarily be true for remote calls if the stub (or whatever) is accessible.
 booleanretryFailedMessage(AttributedMessage message, int retryCount)
     Ask Link whether or not further retries should be attempted.



Method Detail
addMessageAttributes
void addMessageAttributes(MessageAttributes attrs)(Code)
Allows the DestinationLink to add attributes before forwarding the message.
See Also:   DestinationQueue.dispatchNextMessage(AttributedMessage)



cost
int cost(AttributedMessage message)(Code)
This method returns a simple measure of the cost of sending the given message via the associated transport. Only called during processing of messages in DestinationQueueImpl.
See Also:   DestinationQueue.dispatchNextMessage(AttributedMessage)
See Also:   LinkSelectionPolicy
See Also:   MinCostLinkSelectionPolicy



forwardMessage
MessageAttributes forwardMessage(AttributedMessage message) throws UnregisteredNameException, NameLookupException, CommFailureException, MisdeliveredMessageException(Code)
This method is used to request the associated transport to do its thing with the given message. Only called during processing of messages in DestinationQueueImpl.
See Also:   DestinationQueue.dispatchNextMessage(AttributedMessage)



getDestination
MessageAddress getDestination()(Code)
Return the target/destination of this link.



getProtocolClass
Class getProtocolClass()(Code)
the class of corresponding LinkProtocol.



getRemoteReference
Object getRemoteReference()(Code)
Return some form of remote reference for the destination, if it has one (rmi server stub, smtp url, CORBA ior, etc)



isValid
boolean isValid()(Code)
Is this link currently legitimate and functional? The default is true for loopback and would ordinarily be true for remote calls if the stub (or whatever) is accessible. Aspects can alter this behavior, for example to disable unencrypted rmi. This method in invoked on every loaded link before the link selection policy is run; the policy will not see invalid links at all. As a side-effect, cost() will not always be run (as it was before 11_0).



retryFailedMessage
boolean retryFailedMessage(AttributedMessage message, int retryCount)(Code)
Ask Link whether or not further retries should be attempted.



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