org.lsst.ccs.messaging

Class StateBundleAggregator

java.lang.Object

org.lsst.ccs.messaging.StateBundleAggregator

All Implemented Interfaces:

AgentPresenceListener, MessageListener, StatusMessageListener

public class StateBundleAggregator
extends Object
implements StatusMessageListener, AgentPresenceListener

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	StateBundleAggregator.Observer

Constructor Summary

Constructors

Constructor and Description
StateBundleAggregator(AgentMessagingLayer messagingLayer)

Method Summary

Modifier and Type	Method and Description
void	addObserver(StateBundleAggregator.Observer o)
void	addOrigin(String origin)
void	connecting(AgentInfo... agents) Indicates that the list of agents represented by agents is present on the buses.
void	deleteObserver(StateBundleAggregator.Observer o)
void	disconnecting(AgentInfo agent) Indicates that the agent represented by agent has left the buses.
StateBundle	getState(String origin)
Map<String,StateBundle>	getStates()
void	notifyObservers(String origin, StateBundle old, StateBundle change)
void	onStatusMessage(StatusMessage msg) Called when a status message is received.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.lsst.ccs.messaging.AgentPresenceListener

connected, disconnected

Constructor Detail

StateBundleAggregator

public StateBundleAggregator(AgentMessagingLayer messagingLayer)

Method Detail

addOrigin

public void addOrigin(String origin)

onStatusMessage

public void onStatusMessage(StatusMessage msg)

Description copied from interface: StatusMessageListener

Called when a status message is received. The implementation should be thread-safe: the framework makes no guarantees on what thread this method will be called on, and it can be called concurrently for several messages. The implementation should also return immediately : any blocking operations should be scheduled on a separate thread.

Specified by:

onStatusMessage in interface StatusMessageListener

Parameters:

msg - Status bus message to be processed.

addObserver

public void addObserver(StateBundleAggregator.Observer o)

deleteObserver

public void deleteObserver(StateBundleAggregator.Observer o)

notifyObservers

public void notifyObservers(String origin,
                            StateBundle old,
                            StateBundle change)

getState

public StateBundle getState(String origin)

getStates

public Map<String,StateBundle> getStates()

connecting

public void connecting(AgentInfo... agents)

Description copied from interface: AgentPresenceListener

Indicates that the list of agents represented by agents is present on the buses. This method is invoked when the listener is added with all the agents that are already connected. At this point not all services on the connecting agents are guaranteed to have completely started. This method should be used only to receive a notification that an agent is connecting. For a guarantee that an agent information is fully present, please use the #connected methods. The implementation should return immediately : any blocking operations should be scheduled on a separate thread.

Specified by:

connecting in interface AgentPresenceListener

disconnecting

public void disconnecting(AgentInfo agent)

Description copied from interface: AgentPresenceListener

Indicates that the agent represented by agent has left the buses. The implementation should return immediately : any blocking operations should be scheduled on a separate thread.

Specified by:

disconnecting in interface AgentPresenceListener