java.lang.Object
- org.springframework.jmx.support.MBeanRegistrationSupport

Direct Known Subclasses:
ConnectorServerFactoryBean, MBeanExporter
```
public class MBeanRegistrationSupport
extends Object
```
Provides supporting infrastructure for registering MBeans with an MBeanServer. The behavior when encountering an existing MBean at a given ObjectName is fully configurable allowing for flexible registration settings.
All registered MBeans are tracked and can be unregistered by calling the #unregisterBeans() method.
Sub-classes can receive notifications when an MBean is registered or unregistered by overriding the onRegister(ObjectName) and onUnregister(ObjectName) methods respectively.
By default, the registration process will fail if attempting to register an MBean using a ObjectName that is already used.
By setting the registrationPolicy property to RegistrationPolicy.IGNORE_EXISTING the registration process will simply ignore existing MBeans leaving them registered. This is useful in settings where multiple applications want to share a common MBean in a shared MBeanServer.
Setting registrationPolicy property to RegistrationPolicy.REPLACE_EXISTING will cause existing MBeans to be replaced during registration if necessary. This is useful in situations where you can't guarantee the state of your MBeanServer.
Since:
2.0
Author:
Rob Harrop, Juergen Hoeller, Phillip Webb
See Also:
setServer(javax.management.MBeanServer), setRegistrationPolicy(org.springframework.jmx.support.RegistrationPolicy), MBeanExporter

Field Summary
Fields
Modifier and Type Field Description
protected Log logger
Log instance for this class.
protected MBeanServer server
The MBeanServer instance being used to register beans.

Constructor Summary
Constructors
Constructor Description
MBeanRegistrationSupport()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected void`	`doRegister(Object mbean, ObjectName objectName)`	Actually register the MBean with the server.
`protected void`	`doUnregister(ObjectName objectName)`	Actually unregister the specified MBean from the server.
`protected ObjectName[]`	`getRegisteredObjectNames()`	Return the `ObjectNames` of all registered beans.
`MBeanServer`	`getServer()`	Return the `MBeanServer` that the beans will be registered with.
`protected void`	`onRegister(ObjectName objectName)`	Called when an MBean is registered under the given `ObjectName`.
`protected void`	`onRegister(ObjectName objectName, Object mbean)`	Called when an MBean is registered under the given `ObjectName`.
`protected void`	`onUnregister(ObjectName objectName)`	Called when an MBean is unregistered under the given `ObjectName`.
`void`	`setRegistrationPolicy(RegistrationPolicy registrationPolicy)`	The policy to use when attempting to register an MBean under an `ObjectName` that already exists.
`void`	`setServer(MBeanServer server)`	Specify the `MBeanServer` instance with which all beans should be registered.
`protected void`	`unregisterBeans()`	Unregisters all beans that have been registered by an instance of this class.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - logger
```
protected final Log logger
```
    Log instance for this class.
  - server
```
@Nullable
protected MBeanServer server
```
    The MBeanServer instance being used to register beans.
- Constructor Detail
  - MBeanRegistrationSupport
```
public MBeanRegistrationSupport()
```
- Method Detail
  - setServer
```
public void setServer(@Nullable
                      MBeanServer server)
```
    Specify the MBeanServer instance with which all beans should be registered. The MBeanExporter will attempt to locate an existing MBeanServer if none is supplied.
  - getServer
```
@Nullable
public final MBeanServer getServer()
```
    Return the MBeanServer that the beans will be registered with.
  - setRegistrationPolicy
```
public void setRegistrationPolicy(RegistrationPolicy registrationPolicy)
```
    The policy to use when attempting to register an MBean under an ObjectName that already exists.
    Parameters:
    registrationPolicy - the policy to use
    Since:
    3.2
  - doRegister
```
protected void doRegister(Object mbean,
                          ObjectName objectName)
                   throws JMException
```
    Actually register the MBean with the server. The behavior when encountering an existing MBean can be configured using setRegistrationPolicy(org.springframework.jmx.support.RegistrationPolicy).
    Parameters:
    mbean - the MBean instance
    objectName - the suggested ObjectName for the MBean
    Throws:
    JMException - if the registration failed
  - unregisterBeans
```
protected void unregisterBeans()
```
    Unregisters all beans that have been registered by an instance of this class.
  - doUnregister
```
protected void doUnregister(ObjectName objectName)
```
    Actually unregister the specified MBean from the server.
    Parameters:
    objectName - the suggested ObjectName for the MBean
  - getRegisteredObjectNames
```
protected final ObjectName[] getRegisteredObjectNames()
```
    Return the ObjectNames of all registered beans.
  - onRegister
```
protected void onRegister(ObjectName objectName,
                          Object mbean)
```
    Called when an MBean is registered under the given ObjectName. Allows subclasses to perform additional processing when an MBean is registered.
    The default implementation delegates to onRegister(ObjectName).
    Parameters:
    objectName - the actual ObjectName that the MBean was registered with
    mbean - the registered MBean instance
  - onRegister
```
protected void onRegister(ObjectName objectName)
```
    Called when an MBean is registered under the given ObjectName. Allows subclasses to perform additional processing when an MBean is registered.
    The default implementation is empty. Can be overridden in subclasses.
    Parameters:
    objectName - the actual ObjectName that the MBean was registered with
  - onUnregister
```
protected void onUnregister(ObjectName objectName)
```
    Called when an MBean is unregistered under the given ObjectName. Allows subclasses to perform additional processing when an MBean is unregistered.
    The default implementation is empty. Can be overridden in subclasses.
    Parameters:
    objectName - the ObjectName that the MBean was registered with

Modifier and Type	Field	Description
`protected Log`	`logger`	`Log` instance for this class.
`protected MBeanServer`	`server`	The `MBeanServer` instance being used to register beans.

Class MBeanRegistrationSupport

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

logger

server

Constructor Detail

MBeanRegistrationSupport

Method Detail

setServer

getServer

setRegistrationPolicy

doRegister

unregisterBeans

doUnregister

getRegisteredObjectNames

onRegister

onRegister

onUnregister