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MBeanServerConnectionFactoryBean (Spring Framework API 2.0) - Spring Framework 2.0.5 API 文档英文版

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org.springframework.jmx.support
Class MBeanServerConnectionFactoryBean

java.lang.Object
  org.springframework.jmx.support.MBeanServerConnectionFactoryBean

All Implemented Interfaces:

BeanClassLoaderAware, DisposableBean, FactoryBean, InitializingBean

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public class MBeanServerConnectionFactoryBean
extends Object
implements FactoryBean, BeanClassLoaderAware, InitializingBean, DisposableBean

FactoryBean implementation that creates an MBeanServerConnection to a remote MBeanServer exposed via a JMXServerConnector. Exposes the MBeanServer for bean references.

Since:

1.2

Author:

Rob Harrop, Juergen Hoeller

See Also:

MBeanServerFactoryBean, ConnectorServerFactoryBean

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Constructor Summary
MBeanServerConnectionFactoryBean()

 

Method Summary
void	afterPropertiesSet()           Creates a JMXConnector for the given settings and exposes the associated MBeanServerConnection.
void	destroy()           Closes the underlying JMXConnector.
Object	getObject()           Return an instance (possibly shared or independent) of the object managed by this factory.
Class	getObjectType()           Return the type of object that this FactoryBean creates, or null if not known in advance.
boolean	isSingleton()           Is the object managed by this factory a singleton?
void	setBeanClassLoader(ClassLoader classLoader)           Callback that supplies the bean class loader to a bean instance.
void	setConnectOnStartup(boolean connectOnStartup)           Set whether to connect to the server on startup.
void	setEnvironment(Properties environment)           Set the environment properties used to construct the JMXConnector as java.util.Properties (String key/value pairs).
void	setEnvironmentMap(Map environment)           Set the environment properties used to construct the JMXConnector as a Map of String keys and arbitrary Object values.
void	setServiceUrl(String url)           Set the service URL of the remote MBeanServer.

 

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

 

Constructor Detail

MBeanServerConnectionFactoryBean

public MBeanServerConnectionFactoryBean()

Method Detail

setServiceUrl

public void setServiceUrl(String url)
                   throws MalformedURLException

Set the service URL of the remote MBeanServer.

Throws:

MalformedURLException

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setEnvironment

public void setEnvironment(Properties environment)

Set the environment properties used to construct the JMXConnector as java.util.Properties (String key/value pairs).

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setEnvironmentMap

public void setEnvironmentMap(Map environment)

Set the environment properties used to construct the JMXConnector as a Map of String keys and arbitrary Object values.

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setConnectOnStartup

public void setConnectOnStartup(boolean connectOnStartup)

Set whether to connect to the server on startup. Default is "true".

Can be turned off to allow for late start of the JMX server. In this case, the JMX connector will be fetched on first access.

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setBeanClassLoader

public void setBeanClassLoader(ClassLoader classLoader)

Description copied from interface: BeanClassLoaderAware

Callback that supplies the bean class loader to a bean instance.

Invoked after the population of normal bean properties but before an initialization callback such as InitializingBean's InitializingBean.afterPropertiesSet() method or a custom init-method.

Specified by:

setBeanClassLoader in interface BeanClassLoaderAware

Parameters:

classLoader - the owning class loader; may be null in which case a default ClassLoader must be used, for example the ClassLoader obtained via ClassUtils.getDefaultClassLoader()

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afterPropertiesSet

public void afterPropertiesSet()
                        throws IOException

Creates a JMXConnector for the given settings and exposes the associated MBeanServerConnection.

Specified by:

afterPropertiesSet in interface InitializingBean

Throws:

IOException

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getObject

public Object getObject()

Description copied from interface: FactoryBean

Return an instance (possibly shared or independent) of the object managed by this factory.

As with a BeanFactory, this allows support for both the Singleton and Prototype design pattern.

If this FactoryBean is not fully initialized yet at the time of the call (for example because it is involved in a circular reference), throw a corresponding FactoryBeanNotInitializedException.

As of Spring 2.0, FactoryBeans are allowed to return null objects. The factory will consider this as normal value to be used; it will not throw a FactoryBeanNotInitializedException in this case anymore. FactoryBean implementations are encouraged to throw FactoryBeanNotInitializedException themselves now, as appropriate.

Specified by:

getObject in interface FactoryBean

Returns:

an instance of the bean (can be null)

See Also:

FactoryBeanNotInitializedException

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getObjectType

public Class getObjectType()

Description copied from interface: FactoryBean

Return the type of object that this FactoryBean creates, or null if not known in advance.

This allows one to check for specific types of beans without instantiating objects, for example on autowiring.

In the case of implementations that are creating a singleton object, this method should try to avoid singleton creation as far as possible; it should rather estimate the type in advance. For prototypes, returning a meaningful type here is advisable too.

This method can be called before this FactoryBean has been fully initialized. It must not rely on state created during initialization; of course, it can still use such state if available.

NOTE: Autowiring will simply ignore FactoryBeans that return null here. Therefore it is highly recommended to implement this method properly, using the current state of the FactoryBean.

Specified by:

getObjectType in interface FactoryBean

Returns:

the type of object that this FactoryBean creates, or null if not known at the time of the call

See Also:

ListableBeanFactory.getBeansOfType(java.lang.Class)

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isSingleton

public boolean isSingleton()

Description copied from interface: FactoryBean

Is the object managed by this factory a singleton? That is, will FactoryBean.getObject() always return the same object (a reference that can be cached)?

NOTE: If a FactoryBean indicates to hold a singleton object, the object returned from getObject() might get cached by the owning BeanFactory. Hence, do not return true unless the FactoryBean always exposes the same reference.

The singleton status of the FactoryBean itself will generally be provided by the owning BeanFactory; usually, it has to be defined as singleton there.

NOTE: This method returning false does not necessarily indicate that returned objects are independent instances. An implementation of the extended SmartFactoryBean interface may explicitly indicate independent instances through its SmartFactoryBean.isPrototype() method. Plain FactoryBean implementations which do not implement this extended interface are simply assumed to always return independent instances if the isSingleton() implementation returns false.

Specified by:

isSingleton in interface FactoryBean

Returns:

if the exposed object is a singleton

See Also:

FactoryBean.getObject(), SmartFactoryBean.isPrototype()

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destroy

public void destroy()
             throws IOException

Closes the underlying JMXConnector.

Specified by:

destroy in interface DisposableBean

Throws:

IOException

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