cz.cuni.amis.pogamut.base.agent.jmx.adapter

Class AgentMBeanAdapter<T extends IAgent>

java.lang.Object

cz.cuni.amis.pogamut.base.agent.jmx.adapter.AgentMBeanAdapter<T>

All Implemented Interfaces:

IAgentMBeanAdapter

Direct Known Subclasses:

Agent3DMBeanAdapter

public class AgentMBeanAdapter<T extends IAgent>
extends Object
implements IAgentMBeanAdapter

Class for exporting arbitrary agents as managed MBeans.

Author:

Ik

Field Summary

Fields

Modifier and Type	Field and Description
static String	AGENT_NAME_FLAG_NAME
static String	AGENT_STATE_FLAG_NAME

Constructor Summary

Constructors

Constructor and Description
AgentMBeanAdapter(T agent, ObjectName objectName, MBeanServer mbs)

Method Summary

Methods

Modifier and Type	Method and Description
protected T	getAgent()
String	getComponentId() Returns id of the agent - unique across the JVMs.
String	getName() Returns human readable name.
ObjectName	getObjectName(String domain) Returns JMX object name of the MBean.
IAgentState	getState() Returns the state of the agent (whether it's running / dead / etc.).
void	kill() Stops the agent (unconditionally), closing whatever connection it may have, this method must be non-blocking + interrupting all the communication, logic or whatever threads the agent may have.
void	pause() This should pause the the agent.
void	resume() This should resume the logic of the agent.
void	start() Attempt to launch the agent.
void	stop() Attempt to stop the agent, usually meaning dropping all running flags and see whether it will stop automatically.

Methods inherited from class java.lang.Object

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

Field Detail

AGENT_STATE_FLAG_NAME

public static final String AGENT_STATE_FLAG_NAME

See Also:

Constant Field Values

AGENT_NAME_FLAG_NAME

public static final String AGENT_NAME_FLAG_NAME

See Also:

Constant Field Values

Constructor Detail

AgentMBeanAdapter

public AgentMBeanAdapter(T agent,
                 ObjectName objectName,
                 MBeanServer mbs)
                  throws MalformedObjectNameException,
                         InstanceAlreadyExistsException,
                         MBeanRegistrationException,
                         NotCompliantMBeanException

Throws:

MalformedObjectNameException

InstanceAlreadyExistsException

MBeanRegistrationException

NotCompliantMBeanException

Method Detail

getAgent

protected T getAgent()

getObjectName

public ObjectName getObjectName(String domain)
                         throws MalformedObjectNameException

Description copied from interface: IAgentMBeanAdapter

Returns JMX object name of the MBean.

Specified by:

getObjectName in interface IAgentMBeanAdapter

Parameters:

domain - jmx domain

Returns:

name under which the MBean should be exported

Throws:

MalformedObjectNameException

getComponentId

public String getComponentId()

Description copied from interface: IAgentMBeanAdapter

Returns id of the agent - unique across the JVMs.

Specified by:

getComponentId in interface IAgentMBeanAdapter

Returns:

getState

public IAgentState getState()

Description copied from interface: IAgentMBeanAdapter

Returns the state of the agent (whether it's running / dead / etc.).

Note that the type AgentState wraps two things:

• AgentStateType that describes the type of the state (init, running, paused, etc.)
• String description of the state

Specified by:

getState in interface IAgentMBeanAdapter

Returns:

start

public void start()
           throws AgentException

Description copied from interface: IAgentMBeanAdapter

Attempt to launch the agent. If it does not throw an exception, agent has been successfully started, also the state of the agent state is changed into Running state.

Specified by:

start in interface IAgentMBeanAdapter

Throws:

AgentException

pause

public void pause()
           throws AgentException

Description copied from interface: IAgentMBeanAdapter

This should pause the the agent. If it does not throw an exception, agent has been successfully started, also the state of the agent state is changed into Paused state.

If your agent can't be paused, throw OperationNotSupportedException.

Specified by:

pause in interface IAgentMBeanAdapter

Throws:

AgentException

resume

public void resume()
            throws AgentException

Description copied from interface: IAgentMBeanAdapter

This should resume the logic of the agent. If it does not throw an exception, agent has been successfully resumed, also the state of the agent state is changed into Running state.

If your agent can't be paused therefore can't be resumed, throw OperationNotSupportedException.

Specified by:

resume in interface IAgentMBeanAdapter

Throws:

AgentException

stop

public void stop()
          throws AgentException

Description copied from interface: IAgentMBeanAdapter

Attempt to stop the agent, usually meaning dropping all running flags and see whether it will stop automatically. This method may be blocking. If it does not throw the exception, the agent has been successfully stopped, also the state of the agent is changed into End state.

If the stop can not complete - it must automatically call kill() method.

Specified by:

stop in interface IAgentMBeanAdapter

Throws:

AgentException

kill

public void kill()

Description copied from interface: IAgentMBeanAdapter

Stops the agent (unconditionally), closing whatever connection it may have, this method must be non-blocking + interrupting all the communication, logic or whatever threads the agent may have.

After calling kill() method, the only method that may be called is getState() to examine state of the agent.

This also equals to "exception happened outside the agent" and "IFatalErrorEvent should be propagated inside the agent"

Specified by:

kill in interface IAgentMBeanAdapter

getName

public String getName()

Description copied from interface: IAgentMBeanAdapter

Returns human readable name. getDisplayName is set by agent and doesn't have to be unique, while getName is machine assigned and is unique.

Specified by:

getName in interface IAgentMBeanAdapter