org.springframework.jmx.export.assembler
Class AbstractMBeanInfoAssembler

java.lang.Object
  org.springframework.jmx.export.assembler.AbstractMBeanInfoAssembler

All Implemented Interfaces:

MBeanInfoAssembler

Direct Known Subclasses:

AbstractReflectiveMBeanInfoAssembler

public abstract class AbstractMBeanInfoAssembler
extends Object
implements MBeanInfoAssembler

Abstract implementation of the MBeanInfoAssembler interface that encapsulates the creation of a ModelMBeanInfo instance but delegates the creation of metadata to subclasses.

This class offers two flavors of Class extraction from a managed bean instance: getTargetClass(java.lang.Object), extracting the target class behind any kind of AOP proxy, and getClassToExpose(java.lang.Object), returning the class or interface that will be searched for annotations and exposed to the JMX runtime.

Since:

1.2

Author:

Rob Harrop, Juergen Hoeller

Constructor Summary

AbstractMBeanInfoAssembler()

Method Summary

protected void	checkManagedBean(Object managedBean) Check the given bean instance, throwing an IllegalArgumentException if it is not eligible for exposure with this assembler.
protected abstract ModelMBeanAttributeInfo[]	getAttributeInfo(Object managedBean, String beanKey) Get the attribute metadata for the MBean resource.
protected String	getClassName(Object managedBean, String beanKey) Get the class name of the MBean resource.
protected Class	getClassToExpose(Class beanClass) Return the class or interface to expose for the given bean class.
protected Class	getClassToExpose(Object managedBean) Return the class or interface to expose for the given bean.
protected ModelMBeanConstructorInfo[]	getConstructorInfo(Object managedBean, String beanKey) Get the constructor metadata for the MBean resource.
protected String	getDescription(Object managedBean, String beanKey) Get the description of the MBean resource.
ModelMBeanInfo	getMBeanInfo(Object managedBean, String beanKey) Create an instance of the ModelMBeanInfoSupport class supplied with all JMX implementations and populates the metadata through calls to the subclass.
protected ModelMBeanNotificationInfo[]	getNotificationInfo(Object managedBean, String beanKey) Get the notification metadata for the MBean resource.
protected abstract ModelMBeanOperationInfo[]	getOperationInfo(Object managedBean, String beanKey) Get the operation metadata for the MBean resource.
protected Class	getTargetClass(Object managedBean) Return the actual bean class of the given bean instance.
protected void	populateMBeanDescriptor(Descriptor descriptor, Object managedBean, String beanKey) Called after the ModelMBeanInfo instance has been constructed but before it is passed to the MBeanExporter.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractMBeanInfoAssembler

public AbstractMBeanInfoAssembler()

Method Detail

getMBeanInfo

public ModelMBeanInfo getMBeanInfo(Object managedBean,
                                   String beanKey)
                            throws JMException

Create an instance of the ModelMBeanInfoSupport class supplied with all JMX implementations and populates the metadata through calls to the subclass.

Specified by:

getMBeanInfo in interface MBeanInfoAssembler

Parameters:

managedBean - the bean that will be exposed (might be an AOP proxy)

beanKey - the key associated with the managed bean

Returns:

the populated ModelMBeanInfo instance

Throws:

JMException - in case of errors

See Also:

getDescription(Object, String), getAttributeInfo(Object, String), getConstructorInfo(Object, String), getOperationInfo(Object, String), getNotificationInfo(Object, String), populateMBeanDescriptor(javax.management.Descriptor, Object, String)

checkManagedBean

protected void checkManagedBean(Object managedBean)
                         throws IllegalArgumentException

Check the given bean instance, throwing an IllegalArgumentException if it is not eligible for exposure with this assembler.

Default implementation is empty, accepting every bean instance.

Parameters:

managedBean - the bean that will be exposed (might be an AOP proxy)

Throws:

IllegalArgumentException - the bean is not valid for exposure

getTargetClass

protected Class getTargetClass(Object managedBean)

Return the actual bean class of the given bean instance. This is the class exposed to description-style JMX properties.

Default implementation returns the target class for an AOP proxy, and the plain bean class else.

Parameters:

managedBean - the bean instance (might be an AOP proxy)

Returns:

the bean class to expose

See Also:

AopProxyUtils.getTargetClass(java.lang.Object)

getClassToExpose

protected Class getClassToExpose(Object managedBean)

Return the class or interface to expose for the given bean. This is the class that will be searched for attributes and operations (for example, checked for annotations).

Parameters:

managedBean - the bean instance (might be an AOP proxy)

Returns:

the bean class to expose

See Also:

JmxUtils.getClassToExpose(Object)

getClassToExpose

protected Class getClassToExpose(Class beanClass)

Return the class or interface to expose for the given bean class. This is the class that will be searched for attributes and operations

Parameters:

beanClass - the bean class (might be an AOP proxy class)

Returns:

the bean class to expose

See Also:

JmxUtils.getClassToExpose(Class)

getClassName

protected String getClassName(Object managedBean,
                              String beanKey)
                       throws JMException

Get the class name of the MBean resource.

Default implementation returns a simple description for the MBean based on the class name.

Parameters:

managedBean - the bean instance (might be an AOP proxy)

beanKey - the key associated with the MBean in the beans map of the MBeanExporter

Returns:

the MBean description

Throws:

JMException - in case of errors

getDescription

protected String getDescription(Object managedBean,
                                String beanKey)
                         throws JMException

Get the description of the MBean resource.

Default implementation returns a simple description for the MBean based on the class name.

Parameters:

managedBean - the bean instance (might be an AOP proxy)

beanKey - the key associated with the MBean in the beans map of the MBeanExporter

Throws:

JMException - in case of errors

populateMBeanDescriptor

protected void populateMBeanDescriptor(Descriptor descriptor,
                                       Object managedBean,
                                       String beanKey)
                                throws JMException

Called after the ModelMBeanInfo instance has been constructed but before it is passed to the MBeanExporter.

Subclasses can implement this method to add additional descriptors to the MBean metadata. Default implementation is empty.

Parameters:

descriptor - the Descriptor for the MBean resource.

managedBean - the bean instance (might be an AOP proxy)

beanKey - the key associated with the MBean in the beans map of the MBeanExporter

Throws:

JMException - in case of errors

getConstructorInfo

protected ModelMBeanConstructorInfo[] getConstructorInfo(Object managedBean,
                                                         String beanKey)
                                                  throws JMException

Get the constructor metadata for the MBean resource. Subclasses should implement this method to return the appropriate metadata for all constructors that should be exposed in the management interface for the managed resource.

Default implementation returns an empty array of ModelMBeanConstructorInfo.

Parameters:

managedBean - the bean instance (might be an AOP proxy)

beanKey - the key associated with the MBean in the beans map of the MBeanExporter

Returns:

the constructor metadata

Throws:

JMException - in case of errors

getNotificationInfo

protected ModelMBeanNotificationInfo[] getNotificationInfo(Object managedBean,
                                                           String beanKey)
                                                    throws JMException

Get the notification metadata for the MBean resource. Subclasses should implement this method to return the appropriate metadata for all notifications that should be exposed in the management interface for the managed resource.

Default implementation returns an empty array of ModelMBeanNotificationInfo.

Parameters:

managedBean - the bean instance (might be an AOP proxy)

beanKey - the key associated with the MBean in the beans map of the MBeanExporter

Returns:

the notification metadata

Throws:

JMException - in case of errors

getAttributeInfo

protected abstract ModelMBeanAttributeInfo[] getAttributeInfo(Object managedBean,
                                                              String beanKey)
                                                       throws JMException

Get the attribute metadata for the MBean resource. Subclasses should implement this method to return the appropriate metadata for all the attributes that should be exposed in the management interface for the managed resource.

Parameters:

managedBean - the bean instance (might be an AOP proxy)

beanKey - the key associated with the MBean in the beans map of the MBeanExporter

Returns:

the attribute metadata

Throws:

JMException - in case of errors

getOperationInfo

protected abstract ModelMBeanOperationInfo[] getOperationInfo(Object managedBean,
                                                              String beanKey)
                                                       throws JMException

Get the operation metadata for the MBean resource. Subclasses should implement this method to return the appropriate metadata for all operations that should be exposed in the management interface for the managed resource.

Parameters:

managedBean - the bean instance (might be an AOP proxy)

beanKey - the key associated with the MBean in the beans map of the MBeanExporter

Returns:

the operation metadata

Throws:

JMException - in case of errors