Package org.apache.commons.modeler.modules

Class MbeansSource

java.lang.Object

org.apache.commons.modeler.modules.ModelerSource

org.apache.commons.modeler.modules.MbeansSource

All Implemented Interfaces:

MbeansSourceMBean

public class MbeansSource
extends ModelerSource
implements MbeansSourceMBean

This will create mbeans based on a config file. The format is an extended version of MLET. Classloading. We don't support any explicit classloader tag. A ClassLoader is just an mbean ( it can be the standard MLetMBean or a custom one ). XXX add a special attribute to reference the loader mbean, XXX figure out how to deal with private loaders

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	MbeansSource.ArgsInfo

Field Summary

Fields

Modifier and Type	Field	Description
private Document	document
(package private) long	lastUpdate
(package private) static boolean	loaderLoaded
(package private) boolean	loading
private static org.apache.commons.logging.Log	log
(package private) List	mbeans
private HashMap	object2Node
(package private) Registry	registry
(package private) String	type
(package private) long	updateInterval

Fields inherited from class org.apache.commons.modeler.modules.ModelerSource

location, source

Constructor Summary

Constructors

Constructor	Description
MbeansSource()

Method Summary

Modifier and Type	Method	Description
void	destroy()
void	execute()
String	getLocation()
List	getMBeans()	Return the list of mbeans created by this source.
Object	getSource()
void	init()	Call the init method on all mbeans.
void	load()	Load the mbeans from the source.
List	loadDescriptors(Registry registry, String location, String type, Object source)	Load data, returns a list of items.
private MbeansSource.ArgsInfo	processArg(Node mbeanN)
private void	processAttribute(MBeanServer server, Node descN, String objectName)
void	save()	Store the mbeans.
void	setLocation(String loc)
void	setRegistry(Registry reg)
void	setSource(Object source)	Set the source to be used to load the mbeans
void	setType(String type)	Used if a single component is loaded
void	start()
void	stop()
void	updateField(ObjectName oname, String name, Object value)	Callback from the BaseMBean to notify that an attribute has changed.

Methods inherited from class org.apache.commons.modeler.modules.ModelerSource

getInputStream, store

Methods inherited from class java.lang.Object

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

Field Details

log

private static org.apache.commons.logging.Log log

registry

Registry registry

type

String type

loading

boolean loading

mbeans

List mbeans

loaderLoaded

static boolean loaderLoaded

document

private Document document

object2Node

private HashMap object2Node

lastUpdate

long lastUpdate

updateInterval

long updateInterval

Constructor Details

MbeansSource

public MbeansSource()

Method Details

setRegistry

public void setRegistry(Registry reg)

setLocation

public void setLocation(String loc)

setType

public void setType(String type)

Used if a single component is loaded

Parameters:

type -

setSource

public void setSource(Object source)

Description copied from interface: MbeansSourceMBean

Set the source to be used to load the mbeans

Specified by:

setSource in interface MbeansSourceMBean

Parameters:

source - File or URL

getSource

public Object getSource()

Specified by:

getSource in interface MbeansSourceMBean

getLocation

public String getLocation()

getMBeans

public List getMBeans()

Return the list of mbeans created by this source. It can be used to implement runtime services.

Specified by:

getMBeans in interface MbeansSourceMBean

Returns:

List of ObjectName

loadDescriptors

public List loadDescriptors(Registry registry,
 String location,
 String type,
 Object source)
                     throws Exception

Description copied from class: ModelerSource

Load data, returns a list of items.

Overrides:

loadDescriptors in class ModelerSource

Parameters:

registry -

location -

type -

source - Introspected object or some other source

Throws:

Exception

start

public void start()
           throws Exception

Throws:

Exception

stop

public void stop()
          throws Exception

Throws:

Exception

init

public void init()
          throws Exception

Description copied from interface: MbeansSourceMBean

Call the init method on all mbeans. Will call load if not done already

Specified by:

init in interface MbeansSourceMBean

Throws:

Exception

destroy

public void destroy()
             throws Exception

Throws:

Exception

load

public void load()
          throws Exception

Description copied from interface: MbeansSourceMBean

Load the mbeans from the source. Called automatically on init()

Specified by:

load in interface MbeansSourceMBean

Throws:

Exception

execute

public void execute()
             throws Exception

Throws:

Exception

updateField

public void updateField(ObjectName oname,
 String name,
 Object value)

Description copied from class: ModelerSource

Callback from the BaseMBean to notify that an attribute has changed. Can be used to implement persistence.

Overrides:

updateField in class ModelerSource

Parameters:

oname -

name -

value -

save

public void save()

Store the mbeans. XXX add a background thread to store it periodically

Specified by:

save in interface MbeansSourceMBean

processAttribute

private void processAttribute(MBeanServer server,
 Node descN,
 String objectName)

processArg

private MbeansSource.ArgsInfo processArg(Node mbeanN)