Java Doc for MessageReader.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.MessageReader

All known Subclasses:   org.cougaar.mts.base.MessageReaderDelegateImplBase,  org.cougaar.mts.base.MessageReaderImpl,
MessageReader
public interface MessageReader (Code)
This is the first station in the receiver for serializling LinkProtocols. MessageWriter and MessageReader allow aspect authors to examine and filter the serialized data stream.

Aspect implementers must either call the package-access addFilter AttribuedMessage method or use pushValue("Filter", className) to get the MessageWriter and MessageReader delegates to be attached. Each message has the aspect chain built for it and the target's aspect chain is governed by the list as given by the sender. Normally the attribute is added in the DestinationLink's forwardMessage or addAttributes method.

The previous stop is MessageWriter on the sending side. The next stop is MessageDeliverer.
See Also:   AttributedMessage.addFilter(Object)
See Also:   Attributes.pushValue(StringObject)
See Also:   SendLink
See Also:   SendQueue
See Also:   Router
See Also:   DestinationQueue
See Also:   DestinationLink
See Also:   MessageWriter
See Also:   MessageDeliverer
See Also:   ReceiveLink
See Also:   Javadoc contributions from George Mount.





Method Summary
 voidfinalizeAttributes(AttributedMessage msg)
     Called during deserialization of an AttributedMessage after the message attributes have been read.
 voidfinishInput()
     Called during AttributedMessage deserialization after the message body has been read.
 InputStreamgetObjectInputStream(ObjectInput in)
     Called by AttributedMessage during deserialization.
 voidpostProcess()
     Called after finishInput in the AttributedMessage deserialization.
 voidpreProcess()
     Called by AttributedMessage during deserialization before getObjectInputStream and after finalizeAttributes.



Method Detail
finalizeAttributes
void finalizeAttributes(AttributedMessage msg)(Code)
Called during deserialization of an AttributedMessage after the message attributes have been read. Gives the MessageReader the opportunity to view and modify the message attributes.
Parameters:
  msg - The message for which this MessageReader is designated.
See Also:   MessageReader.preProcess()



finishInput
void finishInput() throws java.io.IOException(Code)
Called during AttributedMessage deserialization after the message body has been read.
throws:
  java.io.IOException - The stream could be cached so an IOException can be thrown here.
See Also:   MessageReader.getObjectInputStream(ObjectInput)



getObjectInputStream
InputStream getObjectInputStream(ObjectInput in) throws java.io.IOException, ClassNotFoundException(Code)
Called by AttributedMessage during deserialization. The stream is used to read the serialized message body. The returned InputStream is usually a filtered stream that modifies the contents as they are being read.
Parameters:
  in - The next innermost stream in the nesting. An InputStream to be used for serialization of the message.
See Also:   MessageReader.preProcess
See Also:   MessageReader.finishInput



postProcess
void postProcess()(Code)
Called after finishInput in the AttributedMessage deserialization.
See Also:   MessageReader.finishInput()



preProcess
void preProcess()(Code)
Called by AttributedMessage during deserialization before getObjectInputStream and after finalizeAttributes.
See Also:   MessageReader.finalizeAttributes(AttributedMessage)
See Also:   MessageReader.getObjectInputStream(ObjectInput)



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