org.openqa.jetty.util.jmx

Class ModelMBeanImpl

java.lang.Object

org.openqa.jetty.util.jmx.ModelMBeanImpl

All Implemented Interfaces:

DynamicMBean, MBeanRegistration, ModelMBean, ModelMBeanNotificationBroadcaster, NotificationBroadcaster, PersistentMBean

Direct Known Subclasses:

ConfigurationMBean, LifeCycleMBean

public class ModelMBeanImpl
extends Object
implements ModelMBean, MBeanRegistration

Model MBean Implementation. This implementation of the JMX Model MBean API is designed to allow easy creation of Model MBeans. From minimal descriptions of operations and attributes, reflection is used to determine the full signature and ResourceBundles are used to determine other meta data. This class is normally used in one of the following patterns:

• As a base class for a real MBean that contains the actual attributes and operations of the MBean. Such an Object is only usable in a JMX environment.
• As a proxy MBean to another non-JMX object. The attributes and operations of the proxied object are defined in the MBean. This pattern is used when an existing non-JMX objects API is to be exposed as an MBean.
• As a base class for a proxy MBean. The attributes and oepration of the MBean are implemented by the derived class but delegate to one or more other objects. This pattern is used if existing objects are to be managed by JMX, but a new management API needs to be defined.

Version:

$Revision: 1.18 $

Author:

Greg Wilkins (gregw)

Field Summary

Fields

Modifier and Type	Field and Description
protected ModelMBeanInfoSupport	_beanInfo
static int	IMPACT_ACTION
static int	IMPACT_ACTION_INFO
static int	IMPACT_INFO
static int	IMPACT_UNKOWN
static String	INT
static String[]	NO_PARAMS
static String	OBJECT
static boolean	ON_MBEAN
static boolean	ON_OBJECT
static boolean	READ_ONLY
static boolean	READ_WRITE
static String	STRING

Constructor Summary

Constructors

Constructor and Description
ModelMBeanImpl() MBean Constructor.
ModelMBeanImpl(Object proxyObject) Proxy MBean Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
void	addAttributeChangeNotificationListener(NotificationListener listener, String name, Object handback)
void	addNotificationListener(NotificationListener listener, NotificationFilter filter, Object handback)
void	defineAttribute(ModelMBeanAttributeInfo attrInfo) Define an attribute.
void	defineAttribute(String name) Define an attribute on the managed object.
void	defineAttribute(String name, boolean writable) Define an attribute on the managed object.
void	defineAttribute(String name, boolean writable, boolean onMBean) Define an attribute on the managed object.
protected void	defineManagedResource() Define the Managed Resource.
void	defineOperation(ModelMBeanOperationInfo opInfo) Define an operation.
void	defineOperation(String name, int impact) Define an operation on the managed object.
void	defineOperation(String name, String[] signature, int impact) Define an operation on the managed object.
void	defineOperation(String name, String[] signature, int impact, boolean onMBean) Define an operation on the managed object.
protected void	destroyComponentMBeans(Map map) Unregister mbeans for already registered components
Object	getAttribute(String name)
AttributeList	getAttributes(String[] names)
String	getBaseObjectName()
protected ObjectName[]	getComponentMBeans(Object[] components, Map map) Get Component MBeans.
static String	getDefaultDomain()
Object	getManagedResource()
MBeanInfo	getMBeanInfo()
MBeanServer	getMBeanServer()
MBeanNotificationInfo[]	getNotificationInfo()
ObjectName	getObjectName()
Object	invoke(String name, Object[] params, String[] signature)
void	load()
static ModelMBean	mbeanFor(Object o) Create MBean for Object.
protected ObjectName	newObjectName(MBeanServer server) Create a new ObjectName.
void	postDeregister() Post Deregister.
void	postRegister(Boolean ok)
void	preDeregister()
ObjectName	preRegister(MBeanServer server, ObjectName oName) Pre registration notification.
void	removeAttributeChangeNotificationListener(NotificationListener listener, String name)
void	removeNotificationListener(NotificationListener listener)
void	sendAttributeChangeNotification(Attribute oldAttr, Attribute newAttr)
void	sendAttributeChangeNotification(AttributeChangeNotification notify)
void	sendNotification(Notification notify)
void	sendNotification(String notify)
void	setAttribute(Attribute attr)
AttributeList	setAttributes(AttributeList attrs)
void	setBaseObjectName(String s)
static void	setDefaultDomain(String d)
void	setManagedResource(Object proxyObject, String type)
void	setModelMBeanInfo(ModelMBeanInfo info) Not Supported.
void	store()
ObjectName	uniqueObjectName(MBeanServer server, Object object, String objectName)
ObjectName	uniqueObjectName(MBeanServer server, String objectName) Add an id clause to a JMX object name.

Methods inherited from class java.lang.Object

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

Field Detail

IMPACT_ACTION

public static final int IMPACT_ACTION

See Also:

Constant Field Values

IMPACT_ACTION_INFO

public static final int IMPACT_ACTION_INFO

See Also:

Constant Field Values

IMPACT_INFO

public static final int IMPACT_INFO

See Also:

Constant Field Values

IMPACT_UNKOWN

public static final int IMPACT_UNKOWN

See Also:

Constant Field Values

STRING

public static final String STRING

See Also:

Constant Field Values

OBJECT

public static final String OBJECT

See Also:

Constant Field Values

INT

public static final String INT

See Also:

Constant Field Values

NO_PARAMS

public static final String[] NO_PARAMS

READ_WRITE

public static final boolean READ_WRITE

See Also:

Constant Field Values

READ_ONLY

public static final boolean READ_ONLY

See Also:

Constant Field Values

ON_MBEAN

public static final boolean ON_MBEAN

See Also:

Constant Field Values

ON_OBJECT

public static final boolean ON_OBJECT

See Also:

Constant Field Values

_beanInfo

protected ModelMBeanInfoSupport _beanInfo

Constructor Detail

ModelMBeanImpl

public ModelMBeanImpl()

MBean Constructor. No proxy object is defined. Attributes and operations are defined on this instance.

ModelMBeanImpl

public ModelMBeanImpl(Object proxyObject)

Proxy MBean Constructor.

Parameters:

proxyObject - The actual object on which attributes and operations are to be defined and called.

Method Detail

mbeanFor

public static ModelMBean mbeanFor(Object o)

Create MBean for Object. Attempts to create an MBean for the object by searching the package and class name space. For example an object of the type

   class com.acme.MyClass extends com.acme.util.BaseClass
 

Then this method would look for the following classes:

• com.acme.MyClassMBean
• com.acme.jmx.MyClassMBean
• com.acme.util.BaseClassMBean
• com.acme.util.jmx.BaseClassMBean

Parameters:

o - The object

Returns:

A new instance of an MBean for the object or null.

getDefaultDomain

public static String getDefaultDomain()

setDefaultDomain

public static void setDefaultDomain(String d)

getMBeanServer

public MBeanServer getMBeanServer()

getObjectName

public ObjectName getObjectName()

getManagedResource

public Object getManagedResource()

setManagedResource

public void setManagedResource(Object proxyObject,
                      String type)
                        throws MBeanException,
                               RuntimeOperationsException,
                               InstanceNotFoundException,
                               InvalidTargetObjectTypeException

Specified by:

setManagedResource in interface ModelMBean

Throws:

MBeanException

RuntimeOperationsException

InstanceNotFoundException

InvalidTargetObjectTypeException

defineManagedResource

protected void defineManagedResource()

Define the Managed Resource. This method is called the first time setManagedResource is called with a non-null object. It should be implemented by a derived ModelMBean to define the attributes and operations after an initial object has been set.

setModelMBeanInfo

public void setModelMBeanInfo(ModelMBeanInfo info)
                       throws MBeanException,
                              RuntimeOperationsException

Not Supported. Use RequiredModelMBean for this style of MBean creation.

Specified by:

setModelMBeanInfo in interface ModelMBean

Throws:

MBeanException

RuntimeOperationsException

defineAttribute

public void defineAttribute(String name)

Define an attribute on the managed object. The meta data is defined by looking for standard getter and setter methods. Descriptions are obtained with a call to findDescription with the attribute name.

Parameters:

name - The name of the attribute. Normal java bean capitlization is enforced on this name.

defineAttribute

public void defineAttribute(String name,
                   boolean writable)

Define an attribute on the managed object. The meta data is defined by looking for standard getter and setter methods. Descriptions are obtained with a call to findDescription with the attribute name.

Parameters:

name - The name of the attribute. Normal java bean capitlization is enforced on this name.

writable - If false, do not look for a setter.

defineAttribute

public void defineAttribute(String name,
                   boolean writable,
                   boolean onMBean)

Define an attribute on the managed object. The meta data is defined by looking for standard getter and setter methods. Descriptions are obtained with a call to findDescription with the attribute name.

Parameters:

name - The name of the attribute. Normal java bean capitlization is enforced on this name.

writable - If false, do not look for a setter.

onMBean - .

defineAttribute

public void defineAttribute(ModelMBeanAttributeInfo attrInfo)

Define an attribute. Explicit definition of an attribute. Reflection is used to locate the actual getter and setter methods.

Parameters:

attrInfo - ModelMBeanAttributeInfo.

defineOperation

public void defineOperation(String name,
                   int impact)

Define an operation on the managed object. Defines an operation with no parameters. Refection is used to determine the return type and the description is found with a call to findDescription on "name()".

Parameters:

name - Name of the method call

impact - Impact as defined in MBeanOperationInfo

defineOperation

public void defineOperation(String name,
                   String[] signature,
                   int impact)

Define an operation on the managed object. Defines an operation with parameters. Refection is used to determine find the method and it's return type. The description of the method is found with a call to findDescription on "name(signature)". The name and description of each parameter is found with a call to findDescription with "name(partialSignature", the returned description is for the last parameter of the partial signature and is assumed to start with the parameter name, followed by a colon.

Parameters:

name - The name of the method call.

signature - The types of the operation parameters.

impact - Impact as defined in MBeanOperationInfo

defineOperation

public void defineOperation(String name,
                   String[] signature,
                   int impact,
                   boolean onMBean)

Define an operation on the managed object. Defines an operation with parameters. Refection is used to determine find the method and it's return type. The description of the method is found with a call to findDescription on "name(signature)". The name and description of each parameter is found with a call to findDescription with "name(partialSignature", the returned description is for the last parameter of the partial signature and is assumed to start with the parameter name, followed by a colon.

Parameters:

name - The name of the method call.

signature - The types of the operation parameters.

impact - Impact as defined in MBeanOperationInfo

onMBean - true if the operation is defined on the mbean

defineOperation

public void defineOperation(ModelMBeanOperationInfo opInfo)

Define an operation. Explicit definition of an operation. Reflection is used to locate method called.

Parameters:

opInfo -

getMBeanInfo

public MBeanInfo getMBeanInfo()

Specified by:

getMBeanInfo in interface DynamicMBean

getAttribute

public Object getAttribute(String name)
                    throws AttributeNotFoundException,
                           MBeanException,
                           ReflectionException

Specified by:

getAttribute in interface DynamicMBean

Throws:

AttributeNotFoundException

MBeanException

ReflectionException

getAttributes

public AttributeList getAttributes(String[] names)

Specified by:

getAttributes in interface DynamicMBean

setAttribute

public void setAttribute(Attribute attr)
                  throws AttributeNotFoundException,
                         InvalidAttributeValueException,
                         MBeanException,
                         ReflectionException

Specified by:

setAttribute in interface DynamicMBean

Throws:

AttributeNotFoundException

InvalidAttributeValueException

MBeanException

ReflectionException

setAttributes

public AttributeList setAttributes(AttributeList attrs)

Specified by:

setAttributes in interface DynamicMBean

invoke

public Object invoke(String name,
            Object[] params,
            String[] signature)
              throws MBeanException,
                     ReflectionException

Specified by:

invoke in interface DynamicMBean

Throws:

MBeanException

ReflectionException

load

public void load()
          throws MBeanException,
                 RuntimeOperationsException,
                 InstanceNotFoundException

Specified by:

load in interface PersistentMBean

Throws:

MBeanException

RuntimeOperationsException

InstanceNotFoundException

store

public void store()
           throws MBeanException,
                  RuntimeOperationsException,
                  InstanceNotFoundException

Specified by:

store in interface PersistentMBean

Throws:

MBeanException

RuntimeOperationsException

InstanceNotFoundException

addNotificationListener

public void addNotificationListener(NotificationListener listener,
                           NotificationFilter filter,
                           Object handback)
                             throws IllegalArgumentException

Specified by:

addNotificationListener in interface NotificationBroadcaster

Throws:

IllegalArgumentException

getNotificationInfo

public MBeanNotificationInfo[] getNotificationInfo()

Specified by:

getNotificationInfo in interface NotificationBroadcaster

removeNotificationListener

public void removeNotificationListener(NotificationListener listener)
                                throws ListenerNotFoundException

Specified by:

removeNotificationListener in interface NotificationBroadcaster

Throws:

ListenerNotFoundException

addAttributeChangeNotificationListener

public void addAttributeChangeNotificationListener(NotificationListener listener,
                                          String name,
                                          Object handback)
                                            throws MBeanException,
                                                   RuntimeOperationsException,
                                                   IllegalArgumentException

Specified by:

addAttributeChangeNotificationListener in interface ModelMBeanNotificationBroadcaster

Throws:

MBeanException

RuntimeOperationsException

IllegalArgumentException

removeAttributeChangeNotificationListener

public void removeAttributeChangeNotificationListener(NotificationListener listener,
                                             String name)
                                               throws MBeanException,
                                                      RuntimeOperationsException,
                                                      ListenerNotFoundException

Specified by:

removeAttributeChangeNotificationListener in interface ModelMBeanNotificationBroadcaster

Throws:

MBeanException

RuntimeOperationsException

ListenerNotFoundException

sendAttributeChangeNotification

public void sendAttributeChangeNotification(Attribute oldAttr,
                                   Attribute newAttr)
                                     throws MBeanException,
                                            RuntimeOperationsException

Specified by:

sendAttributeChangeNotification in interface ModelMBeanNotificationBroadcaster

Throws:

MBeanException

RuntimeOperationsException

sendAttributeChangeNotification

public void sendAttributeChangeNotification(AttributeChangeNotification notify)
                                     throws MBeanException,
                                            RuntimeOperationsException

Specified by:

sendAttributeChangeNotification in interface ModelMBeanNotificationBroadcaster

Throws:

MBeanException

RuntimeOperationsException

sendNotification

public void sendNotification(String notify)
                      throws MBeanException,
                             RuntimeOperationsException

Specified by:

sendNotification in interface ModelMBeanNotificationBroadcaster

Throws:

MBeanException

RuntimeOperationsException

sendNotification

public void sendNotification(Notification notify)
                      throws MBeanException,
                             RuntimeOperationsException

Specified by:

sendNotification in interface ModelMBeanNotificationBroadcaster

Throws:

MBeanException

RuntimeOperationsException

newObjectName

protected ObjectName newObjectName(MBeanServer server)

Create a new ObjectName. Return a new object name. The default implementation is the results of uniqueObjectName(baseObjectName), if baseObjectName is not set, then the results of uniqueObjectName(defaultDomain+":");

Returns:

The Object name

setBaseObjectName

public void setBaseObjectName(String s)

getBaseObjectName

public String getBaseObjectName()

preRegister

public ObjectName preRegister(MBeanServer server,
                     ObjectName oName)

Pre registration notification. If this method is specialized by a derived class that may set the objectName, then it should call this implementation with the new objectName.

Specified by:

preRegister in interface MBeanRegistration

Parameters:

server -

oName -

Returns:

The ObjectName to use.

postRegister

public void postRegister(Boolean ok)

Specified by:

postRegister in interface MBeanRegistration

preDeregister

public void preDeregister()

Specified by:

preDeregister in interface MBeanRegistration

postDeregister

public void postDeregister()

Post Deregister. This implementation destroys this MBean and it cannot be used again.

Specified by:

postDeregister in interface MBeanRegistration

uniqueObjectName

public ObjectName uniqueObjectName(MBeanServer server,
                          String objectName)

Add an id clause to a JMX object name. Used to make unique objectnames when there are no other distinguishing attributes. If the passed object name ends with '=', just a unique ID is added. Otherwise and classname= clause is added.

Parameters:

objectName -

Returns:

objectName with id= class.

uniqueObjectName

public ObjectName uniqueObjectName(MBeanServer server,
                          Object object,
                          String objectName)

getComponentMBeans

protected ObjectName[] getComponentMBeans(Object[] components,
                              Map map)

Get Component MBeans. Creates, registers and deregisters MBeans for an array of components. On each call the passed map is used to determine components that have already been registers and those that need to be deregistered.

Parameters:

components - the components.

map - A map of previously registered components to object name. If null is passed, a default map for the mbean is used.

Returns:

An array of ObjectNames for each component.

destroyComponentMBeans

protected void destroyComponentMBeans(Map map)

Unregister mbeans for already registered components

Parameters:

map -