## 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:
    `org.springframework.aop.framework.AopProxyUtils#getTargetClass`

### 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