org.universAAL.middleware.context.impl
Class ContextBusImpl

java.lang.Object
  org.universAAL.middleware.bus.model.AbstractBus
      org.universAAL.middleware.context.impl.ContextBusImpl

All Implemented Interfaces:

Broker, ContextBus, MessageListener

public class ContextBusImpl
extends AbstractBus
implements ContextBus

Author:

mtazari - Saied Tazari

Field Summary

Fields inherited from class org.universAAL.middleware.bus.model.AbstractBus

aalSpaceManager, busStrategy, communicationModule, context, registry

Method Summary

void	addNewRegParams(String memberID, ContextEventPattern[] registrParams) Allows the members of the context bus to provide registration parameters; for the meaning of the provided "registration parameters" see the explanation for the input parameter registrParams.
void	assessContentSerialization(Resource content)
void	brokerContextEvent(String publisherID, ContextEvent msg) Send a Context Event through the Context Bus
protected BusStrategy	createBusStrategy(CommunicationModule commModule)
ContextEventPattern[]	getAllProvisions(String publisherID) Returns all provisions registered by all ContextPublishers on all instances of this bus in the current AAL Space.
static Object[]	getContextBusFetchParams()
void	handleSendError(ChannelMessage message, CommunicationConnectorException e) Callback for error handling
void	removeMatchingRegParams(String memberID, ContextEventPattern[] oldRegistrParams) Removes registration parameters introduced previously through ContextBus.addNewRegParams(String, ContextEventPattern[]).
static void	startModule(Container c, ModuleContext mc, Object[] contextBusShareParams, Object[] contextBusFetchParams)
static void	stopModule()
void	unregister(String memberID, BusMember m) Unregisters bus member from the bus (if the bus member with given ID exists).
void	unregister(String publisherID, ContextPublisher publisher) Unregister a Context Publisher from the Context Bus
void	unregister(String subscriberID, ContextSubscriber subscriber) Unregister a Context Subscriber from the Context Bus

Methods inherited from class org.universAAL.middleware.bus.model.AbstractBus

addRegistryListener, brokerMessage, createRegistry, dispose, getBrokerName, getBusMember, getBusMemberID, getBusMembers, getBusMembersByID, getCurrentNumberOfPeers, getPeerCard, getPeerFromBusResourceURI, getURI, init, initBrokerage, isBusResourceURI, isValidMember, messageReceived, register, removeRegistryListener, unmarshall

Methods inherited from class java.lang.Object

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

Method Detail

getContextBusFetchParams

public static Object[] getContextBusFetchParams()

assessContentSerialization

public void assessContentSerialization(Resource content)

startModule

public static void startModule(Container c,
                               ModuleContext mc,
                               Object[] contextBusShareParams,
                               Object[] contextBusFetchParams)

stopModule

public static void stopModule()

createBusStrategy

protected BusStrategy createBusStrategy(CommunicationModule commModule)

Specified by:

createBusStrategy in class AbstractBus

addNewRegParams

public void addNewRegParams(String memberID,
                            ContextEventPattern[] registrParams)

Description copied from interface: ContextBus

Allows the members of the context bus to provide registration parameters; for the meaning of the provided "registration parameters" see the explanation for the input parameter registrParams.

Specified by:

addNewRegParams in interface ContextBus

Parameters:

memberID - The ID of the subscriber or publisher registered to the context bus

registrParams - If the memberID refers to a context subscriber, registrParams will be interpreted as the patterns of the context events to which the subscriber wants to subscribe, and if the memberID refers to a context publisher, it will be interpreted as the patterns of the context events that the publisher will publish

getAllProvisions

public ContextEventPattern[] getAllProvisions(String publisherID)

Description copied from interface: ContextBus

Returns all provisions registered by all ContextPublishers on all instances of this bus in the current AAL Space. Only ContextPublishers are allowed to call this method, hence they must provide their member-ID so that the bus can check this.

Specified by:

getAllProvisions in interface ContextBus

removeMatchingRegParams

public void removeMatchingRegParams(String memberID,
                                    ContextEventPattern[] oldRegistrParams)

Description copied from interface: ContextBus

Removes registration parameters introduced previously through ContextBus.addNewRegParams(String, ContextEventPattern[]).

Specified by:

removeMatchingRegParams in interface ContextBus

brokerContextEvent

public void brokerContextEvent(String publisherID,
                               ContextEvent msg)

Description copied from interface: ContextBus

Send a Context Event through the Context Bus

Specified by:

brokerContextEvent in interface ContextBus

Parameters:

publisherID - ID of the Publisher registered to the context bus

msg - Context Event to forward through the bus

unregister

public void unregister(String publisherID,
                       ContextPublisher publisher)

Description copied from interface: ContextBus

Unregister a Context Publisher from the Context Bus

Specified by:

unregister in interface ContextBus

Parameters:

publisherID - ID of the Publisher registered to the context bus

publisher - The Publisher to unregister.

unregister

public void unregister(String subscriberID,
                       ContextSubscriber subscriber)

Description copied from interface: ContextBus

Unregister a Context Subscriber from the Context Bus

Specified by:

unregister in interface ContextBus

Parameters:

subscriberID - ID of the Subscriber registered to the context bus

subscriber - The Subscriber to unregister.

unregister

public void unregister(String memberID,
                       BusMember m)

Description copied from class: AbstractBus

Unregisters bus member from the bus (if the bus member with given ID exists).

Overrides:

unregister in class AbstractBus

handleSendError

public void handleSendError(ChannelMessage message,
                            CommunicationConnectorException e)

Description copied from interface: MessageListener

Callback for error handling

Specified by:

handleSendError in interface MessageListener