org.powertac.visualizer.service_ptac

Class MessageDispatcher

java.lang.Object

org.powertac.visualizer.service_ptac.MessageDispatcher

All Implemented Interfaces:

org.powertac.common.interfaces.VisualizerMessageListener, NewObjectListener

@Service
public class MessageDispatcher
extends Object
implements org.powertac.common.interfaces.VisualizerMessageListener, NewObjectListener

ADAPTED FROM broker core

Routes incoming messages to broker components, and outgoing messages to the server. Components must register for specific message types with the broker, which passes the registrations to this router. For this to work, registered components must implement a handleMessage(msg) method that takes the specified type as its single argument.

Author:

Jurica Babic, Govert Buijs, Erik Kemperman

Constructor Summary

Constructors

Constructor and Description
MessageDispatcher()

Method Summary

Modifier and Type	Method and Description
void	afterPropertiesSet()
static Object	dispatch(Object target, String methodName, Object... args) Dispatches a call to methodName inside target based on the type of message.
void	handleNewObject(Object obj)
void	receiveMessage(Object message)
void	registerAllHandlers()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MessageDispatcher

public MessageDispatcher()

Method Detail

afterPropertiesSet

@PostConstruct
public void afterPropertiesSet()
                                       throws Exception

Throws:

Exception

receiveMessage

public void receiveMessage(Object message)

Specified by:

receiveMessage in interface org.powertac.common.interfaces.VisualizerMessageListener

handleNewObject

public void handleNewObject(Object obj)

Specified by:

handleNewObject in interface NewObjectListener

dispatch

public static Object dispatch(Object target,
                              String methodName,
                              Object... args)

Dispatches a call to methodName inside target based on the type of message. Allows polymorphic method dispatch without the use of visitor or double dispatch schemes, which produce nasty couplings with domain types.

Note that this scheme finds only exact matches between types of arguments and declared types of formal parameters for declared or inherited methods. So it will not call a method with formal parameter types of (Transaction, List) if the actual arguments are (Transaction, ArrayList).

registerAllHandlers

public void registerAllHandlers()