org.lsst.ccs.services

Class AgentVersionsService

java.lang.Object

org.lsst.ccs.services.AgentVersionsService

All Implemented Interfaces:

HasLifecycle, ServiceLifecycle, AgentService

public class AgentVersionsService
extends Object
implements AgentService, ServiceLifecycle, HasLifecycle

An Agent Service to handle information related to the distribution. This information includes versions for: - the current running agent - the toolkit it's using - the distribution it's running in This service also provides a way to verify that the current versions are supported by the cluster it's running in. This service is activated for all Agents.

Author:

The LSST CCS Team

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	AgentVersionsService.VersionCommands
static class	AgentVersionsService.VersionConstraint

Field Summary

Fields

Modifier and Type	Field and Description
static String	AGENT
static String	DISTRIBUTION
org.lsst.ccs.utilities.taitime.CCSTimeStamp	lastPublicationTimeStamp
static String	TOOLKIT
static String	VERSIONS_KEY

Constructor Summary

Constructors

Constructor and Description
AgentVersionsService()

Method Summary

Modifier and Type	Method and Description
protected Properties	extractVersionConstraintPropertiesFor(String key, Properties props)
String	getAgentServiceName() Get the name of this service.
Map<String,DistributionInfo>	getAllDistributionInfo()
CCSVersions	getCCSVersions()
KeyValueData	getCCSVersionsData()
void	preBuild()
void	preInit()
void	preShutdown()
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

Methods inherited from interface org.lsst.ccs.framework.HasLifecycle

build, init, postBuild, postInit, postShutdown, postStart, shutdown, start

Field Detail

AGENT

public static final String AGENT

See Also:

Constant Field Values

TOOLKIT

public static final String TOOLKIT

See Also:

Constant Field Values

DISTRIBUTION

public static final String DISTRIBUTION

See Also:

Constant Field Values

VERSIONS_KEY

public static final String VERSIONS_KEY

See Also:

Constant Field Values

lastPublicationTimeStamp

public volatile org.lsst.ccs.utilities.taitime.CCSTimeStamp lastPublicationTimeStamp

Constructor Detail

AgentVersionsService

public AgentVersionsService()

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

preInit

public void preInit()

Specified by:

preInit 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

preShutdown

public void preShutdown()

Specified by:

preShutdown in interface ServiceLifecycle

getCCSVersions

public CCSVersions getCCSVersions()

getCCSVersionsData

public KeyValueData getCCSVersionsData()

extractVersionConstraintPropertiesFor

protected Properties extractVersionConstraintPropertiesFor(String key,
                                                           Properties props)

getAllDistributionInfo

public Map<String,DistributionInfo> getAllDistributionInfo()