org.lsst.ccs.services

Class MessagingService

java.lang.Object

org.lsst.ccs.services.MessagingService

All Implemented Interfaces:

Dispatcher.Listener, ServiceLifecycle, AgentService

public class MessagingService
extends Object
implements AgentService, ServiceLifecycle, Dispatcher.Listener

An AgentService that manages the underlying messaging service.

Author:

The LSST CCS Team

Constructor Summary

Constructors

Constructor and Description
MessagingService()

Method Summary

Modifier and Type	Method and Description
void	afterBuild()
String	getAgentServiceName() Get the name of this service.
AgentMessagingLayer	getMessagingAccess() Returns AgentMessagingLayer used by this Agent.
boolean	isConnectedToTheBuses() Returns true once the Agent has been connected to the buses.
void	onEvent(Dispatcher.Event event)
void	preBuild()
void	preStart() Called from the enclosing Subsystem when org.lsst.ccs.Subsystem#start() has been called.
boolean	startForAgent(AgentInfo agentInfo) This method is invoked after an agent service is created to see if this service is to be started for the tiven Agent.

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.ServiceLifecycle

afterInit, afterStart, preInit, preShutdown

Constructor Detail

MessagingService

public MessagingService()

Method Detail

getAgentServiceName

public String getAgentServiceName()

Description copied from interface: AgentService

Get the name of this service. This name will be used to add the given service to the lookup tree.

Specified by:

getAgentServiceName in interface AgentService

Returns:

the AgentService name.

startForAgent

public boolean startForAgent(AgentInfo agentInfo)

Description copied from interface: AgentService

This method is invoked after an agent service is created to see if this service is to be started for the tiven Agent.

Specified by:

startForAgent in interface AgentService

Returns:

true if the service is to be added to the given agent.

preBuild

public void preBuild()

Specified by:

preBuild in interface ServiceLifecycle

afterBuild

public void afterBuild()

Specified by:

afterBuild in interface ServiceLifecycle

preStart

public void preStart()

Description copied from interface: ServiceLifecycle

Called from the enclosing Subsystem when org.lsst.ccs.Subsystem#start() has been called.

The preceding lifecycle step is HasLifecycle.postInit()

The following lifecycle step is HasLifecycle.start() At the time it is called :

• the PhaseState is INITIALIZING
• connection with the messaging layer is effective, the enclosing subsystem has started StatusHeartBeat publication

Specified by:

preStart in interface ServiceLifecycle

getMessagingAccess

public AgentMessagingLayer getMessagingAccess()

Returns AgentMessagingLayer used by this Agent. The returned instance is used by the Agent internally, and can also be used by the client code to publish messages on the buses.

Returns:

AgentMessagingLayer used by this Agent

isConnectedToTheBuses

public boolean isConnectedToTheBuses()

Returns true once the Agent has been connected to the buses.

Returns:

True if the Agent has been connected to the buses.

onEvent

public void onEvent(Dispatcher.Event event)

Specified by:

onEvent in interface Dispatcher.Listener