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Java Source Code / Java Documentation » 6.0 JDK Modules » j2me » com.sun.jump.message

Source Cross Reference Class Diagram Java Document (Java Doc)

com.sun.jump.message .JUMPMessageDispatcher

All known Subclasses:   com.sun.jumpimpl.process .JUMPMessageDispatcherImpl,
JUMPMessageDispatcher
public interface JUMPMessageDispatcher (Code)
JUMPMessageDispatcher is a high-level construct used to read messages from underlying message queues and distribute them to listeners.

Method Summary
public void cancelRegistration(Object registrationToken)
     Removes the registration for the message type.
public Object registerDirect(String messageType)
     Registers the message type for direct receipt via waitForMessage().
public Object registerHandler(String messageType, JUMPMessageHandler handler)
     Registers the message handler for the message type.
public JUMPMessage waitForMessage(String messageType, long timeout)
     Blocks and waits for a message of type messageType.

Method Detail
cancelRegistration
public void cancelRegistration(Object registrationToken) throws IOException(Code)
Removes the registration for the message type. This applies to direct registrations as well as handler registrations.
throws:
  IOException - if there is a problem canceling theregistration.
throws:
  IllegalStateException - if the registrationTokenhas already been canceled.

registerDirect
public Object registerDirect(String messageType) throws JUMPMessageDispatcherTypeException, IOException(Code)
Registers the message type for direct receipt via waitForMessage(). This is akin to a reservation of the type before blocking on incoming messages. opaque object that represents the registration. The token can beused to cancel the registaration usingJUMPMessageDispatcher.cancelRegistration(Object)
throws:
  JUMPMessageDispatcherTypeException - if there is already anexisting handler registration for the message type.
throws:
  IOException - if there is a problem registering for themessage type.

registerHandler
public Object registerHandler(String messageType, JUMPMessageHandler handler) throws JUMPMessageDispatcherTypeException, IOException(Code)
Registers the message handler for the message type. This starts a daemon thread which will persist until all handlers for the message type have been cancelled. opaque object that represents the registration. The token can beused to cancel the registaration usingJUMPMessageDispatcher.cancelRegistration(Object)
throws:
  JUMPMessageDispatcherTypeException - if the message type wasregistered via registerDirect().
throws:
  IOException - if there is a problem registering for themessage type.

waitForMessage
public JUMPMessage waitForMessage(String messageType, long timeout) throws JUMPMessageDispatcherTypeException, JUMPTimedOutException, IOException(Code)
Blocks and waits for a message of type messageType.
throws:
  JUMPMessageDispatcherTypeException - if there is alreadyan existing handler registration for the message type, or if it has notbeen registered via registerDirect().
throws:
  JUMPTimedOutException -
throws:
  JUMPUnblockedException -
throws:
  IOException -

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