org.springframework.jmx.export

Class MBeanExporter

java.lang.Object

org.springframework.jmx.support.MBeanRegistrationSupport

org.springframework.jmx.export.MBeanExporter

All Implemented Interfaces:

Aware, BeanClassLoaderAware, BeanFactoryAware, DisposableBean, InitializingBean, MBeanExportOperations

Direct Known Subclasses:

AnnotationMBeanExporter

public class MBeanExporter
extends MBeanRegistrationSupport
implements MBeanExportOperations, BeanClassLoaderAware, BeanFactoryAware, InitializingBean, DisposableBean

JMX exporter that allows for exposing any Spring-managed bean to a JMX MBeanServer, without the need to define any JMX-specific information in the bean classes.

If a bean implements one of the JMX management interfaces, MBeanExporter can simply register the MBean with the server through its autodetection process.

If a bean does not implement one of the JMX management interfaces, MBeanExporter will create the management information using the supplied MBeanInfoAssembler.

A list of MBeanExporterListeners can be registered via the listeners property, allowing application code to be notified of MBean registration and unregistration events.

This exporter is compatible with JMX 1.2 on Java 5 and above. As of Spring 2.5, it also autodetects and exports Java 6 MXBeans.

Since:

1.2

Author:

Rob Harrop, Juergen Hoeller, Rick Evans, Mark Fisher

See Also:

setBeans(java.util.Map<java.lang.String, java.lang.Object>), setAutodetect(boolean), setAssembler(org.springframework.jmx.export.assembler.MBeanInfoAssembler), setListeners(org.springframework.jmx.export.MBeanExporterListener[]), MBeanInfoAssembler, MBeanExporterListener

Field Summary

Fields

Modifier and Type	Field and Description
static int	AUTODETECT_ALL Autodetection mode indicating that all autodetection mechanisms should be used.
static int	AUTODETECT_ASSEMBLER Autodetection mode indicating that only the MBeanInfoAssembler should be able to autodetect beans.
static int	AUTODETECT_MBEAN Autodetection mode indicating that only valid MBeans should be autodetected.
static int	AUTODETECT_NONE Autodetection mode indicating that no autodetection should be used.

Fields inherited from class org.springframework.jmx.support.MBeanRegistrationSupport

logger, REGISTRATION_FAIL_ON_EXISTING, REGISTRATION_IGNORE_EXISTING, REGISTRATION_REPLACE_EXISTING, server

Constructor Summary

Constructors

Constructor and Description
MBeanExporter()

Method Summary

Modifier and Type	Method and Description
protected DynamicMBean	adaptMBeanIfPossible(Object bean) Build an adapted MBean for the given bean instance, if possible.
void	afterPropertiesSet() Start bean registration automatically when deployed in an ApplicationContext.
protected ModelMBean	createAndConfigureMBean(Object managedResource, String beanKey) Creates an MBean that is configured with the appropriate management interface for the supplied managed resource.
protected ModelMBean	createModelMBean() Create an instance of a class that implements ModelMBean.
void	destroy() Unregisters all beans that this exported has exposed via JMX when the enclosing ApplicationContext is destroyed.
protected ObjectName	getObjectName(Object bean, String beanKey) Retrieve the ObjectName for a bean.
protected boolean	isBeanDefinitionLazyInit(ListableBeanFactory beanFactory, String beanName) Return whether the specified bean definition should be considered as lazy-init.
protected boolean	isMBean(Class<?> beanClass) Determine whether the given bean class qualifies as an MBean as-is.
protected void	onRegister(ObjectName objectName) Called when an MBean is registered.
protected void	onUnregister(ObjectName objectName) Called when an MBean is unregistered.
protected ObjectName	registerBeanNameOrInstance(Object mapValue, String beanKey) Registers an individual bean with the MBeanServer.
protected void	registerBeans() Registers the defined beans with the MBeanServer.
ObjectName	registerManagedResource(Object managedResource) Register the supplied resource with JMX.
void	registerManagedResource(Object managedResource, ObjectName objectName) Register the supplied resource with JMX.
void	setAllowEagerInit(boolean allowEagerInit) Specify whether to allow eager initialization of candidate beans when autodetecting MBeans in the Spring application context.
void	setAssembler(MBeanInfoAssembler assembler) Set the implementation of the MBeanInfoAssembler interface to use for this exporter.
void	setAutodetect(boolean autodetect) Set whether to autodetect MBeans in the bean factory that this exporter runs in.
void	setAutodetectMode(int autodetectMode) Set the autodetection mode to use.
void	setAutodetectModeName(String constantName) Set the autodetection mode to use by name.
void	setBeanClassLoader(ClassLoader classLoader) Callback that supplies the bean class loader to a bean instance.
void	setBeanFactory(BeanFactory beanFactory) This callback is only required for resolution of bean names in the "beans" Map and for autodetection of MBeans (in the latter case, a ListableBeanFactory is required).
void	setBeans(Map<String,Object> beans) Supply a Map of beans to be registered with the JMX MBeanServer.
void	setEnsureUniqueRuntimeObjectNames(boolean ensureUniqueRuntimeObjectNames) Indicates whether Spring should ensure that ObjectNames generated by the configured ObjectNamingStrategy for runtime-registered MBeans (registerManagedResource(java.lang.Object)) should get modified: to ensure uniqueness for every instance of a managed Class.
void	setExcludedBeans(String[] excludedBeans) Set the list of names for beans that should be excluded from autodetection.
void	setExposeManagedResourceClassLoader(boolean exposeManagedResourceClassLoader) Indicates whether or not the managed resource should be exposed on the thread context ClassLoader before allowing any invocations on the MBean to occur.
void	setListeners(MBeanExporterListener[] listeners) Set the MBeanExporterListeners that should be notified of MBean registration and unregistration events.
void	setNamingStrategy(ObjectNamingStrategy namingStrategy) Set the implementation of the ObjectNamingStrategy interface to use for this exporter.
void	setNotificationListenerMappings(Map<?,? extends NotificationListener> listeners) Set the NotificationListeners to register with the MBeanServer.
void	setNotificationListeners(NotificationListenerBean[] notificationListeners) Set the NotificationListenerBeans containing the NotificationListeners that will be registered with the MBeanServer.
void	unregisterManagedResource(ObjectName objectName) Remove the specified MBean from the underlying MBeanServer registry.

Methods inherited from class org.springframework.jmx.support.MBeanRegistrationSupport

doRegister, doUnregister, getRegisteredObjectNames, getServer, onRegister, setRegistrationBehavior, setRegistrationBehaviorName, setRegistrationPolicy, setServer, unregisterBeans

Methods inherited from class java.lang.Object

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

Field Detail

AUTODETECT_NONE

public static final int AUTODETECT_NONE

Autodetection mode indicating that no autodetection should be used.

See Also:

Constant Field Values

AUTODETECT_MBEAN

public static final int AUTODETECT_MBEAN

Autodetection mode indicating that only valid MBeans should be autodetected.

See Also:

Constant Field Values

AUTODETECT_ASSEMBLER

public static final int AUTODETECT_ASSEMBLER

Autodetection mode indicating that only the MBeanInfoAssembler should be able to autodetect beans.

See Also:

Constant Field Values

AUTODETECT_ALL

public static final int AUTODETECT_ALL

Autodetection mode indicating that all autodetection mechanisms should be used.

See Also:

Constant Field Values

Constructor Detail

MBeanExporter

public MBeanExporter()

Method Detail

setBeans

public void setBeans(Map<String,Object> beans)

Supply a Map of beans to be registered with the JMX MBeanServer.

The String keys are the basis for the creation of JMX object names. By default, a JMX ObjectName will be created straight from the given key. This can be customized through specifying a custom NamingStrategy.

Both bean instances and bean names are allowed as values. Bean instances are typically linked in through bean references. Bean names will be resolved as beans in the current factory, respecting lazy-init markers (that is, not triggering initialization of such beans).

Parameters:

beans - Map with JMX names as keys and bean instances or bean names as values

See Also:

setNamingStrategy(org.springframework.jmx.export.naming.ObjectNamingStrategy), KeyNamingStrategy, ObjectName.ObjectName(String)

setAutodetect

public void setAutodetect(boolean autodetect)

Set whether to autodetect MBeans in the bean factory that this exporter runs in. Will also ask an AutodetectCapableMBeanInfoAssembler if available.

This feature is turned off by default. Explicitly specify true here to enable autodetection.

See Also:

setAssembler(org.springframework.jmx.export.assembler.MBeanInfoAssembler), AutodetectCapableMBeanInfoAssembler, isMBean(java.lang.Class<?>)

setAutodetectMode

public void setAutodetectMode(int autodetectMode)

Set the autodetection mode to use.

Throws:

IllegalArgumentException - if the supplied value is not one of the AUTODETECT_ constants

See Also:

setAutodetectModeName(String), AUTODETECT_ALL, AUTODETECT_ASSEMBLER, AUTODETECT_MBEAN, AUTODETECT_NONE

setAutodetectModeName

public void setAutodetectModeName(String constantName)

Set the autodetection mode to use by name.

Throws:

IllegalArgumentException - if the supplied value is not resolvable to one of the AUTODETECT_ constants or is null

See Also:

setAutodetectMode(int), AUTODETECT_ALL, AUTODETECT_ASSEMBLER, AUTODETECT_MBEAN, AUTODETECT_NONE

setAllowEagerInit

public void setAllowEagerInit(boolean allowEagerInit)

Specify whether to allow eager initialization of candidate beans when autodetecting MBeans in the Spring application context.

Default is "false", respecting lazy-init flags on bean definitions. Switch this to "true" in order to search lazy-init beans as well, including FactoryBean-produced objects that haven't been initialized yet.

setAssembler

public void setAssembler(MBeanInfoAssembler assembler)

Set the implementation of the MBeanInfoAssembler interface to use for this exporter. Default is a SimpleReflectiveMBeanInfoAssembler.

The passed-in assembler can optionally implement the AutodetectCapableMBeanInfoAssembler interface, which enables it to participate in the exporter's MBean autodetection process.

See Also:

SimpleReflectiveMBeanInfoAssembler, AutodetectCapableMBeanInfoAssembler, MetadataMBeanInfoAssembler, setAutodetect(boolean)

setNamingStrategy

public void setNamingStrategy(ObjectNamingStrategy namingStrategy)

Set the implementation of the ObjectNamingStrategy interface to use for this exporter. Default is a KeyNamingStrategy.

See Also:

KeyNamingStrategy, MetadataNamingStrategy

setListeners

public void setListeners(MBeanExporterListener[] listeners)

Set the MBeanExporterListeners that should be notified of MBean registration and unregistration events.

See Also:

MBeanExporterListener

setExcludedBeans

public void setExcludedBeans(String[] excludedBeans)

Set the list of names for beans that should be excluded from autodetection.

setEnsureUniqueRuntimeObjectNames

public void setEnsureUniqueRuntimeObjectNames(boolean ensureUniqueRuntimeObjectNames)

Indicates whether Spring should ensure that ObjectNames generated by the configured ObjectNamingStrategy for runtime-registered MBeans (registerManagedResource(java.lang.Object)) should get modified: to ensure uniqueness for every instance of a managed Class.

The default value is true.

See Also:

registerManagedResource(java.lang.Object), JmxUtils.appendIdentityToObjectName(javax.management.ObjectName, Object)

setExposeManagedResourceClassLoader

public void setExposeManagedResourceClassLoader(boolean exposeManagedResourceClassLoader)

Indicates whether or not the managed resource should be exposed on the thread context ClassLoader before allowing any invocations on the MBean to occur.

The default value is true, exposing a SpringModelMBean which performs thread context ClassLoader management. Switch this flag off to expose a standard JMX RequiredModelMBean.

setNotificationListeners

public void setNotificationListeners(NotificationListenerBean[] notificationListeners)

Set the NotificationListenerBeans containing the NotificationListeners that will be registered with the MBeanServer.

See Also:

setNotificationListenerMappings(java.util.Map), NotificationListenerBean

setNotificationListenerMappings

public void setNotificationListenerMappings(Map<?,? extends NotificationListener> listeners)

Set the NotificationListeners to register with the MBeanServer.

The key of each entry in the Map is a String representation of the ObjectName or the bean name of the MBean the listener should be registered for. Specifying an asterisk (*) for a key will cause the listener to be associated with all MBeans registered by this class at startup time.

The value of each entry is the NotificationListener to register. For more advanced options such as registering NotificationFilters and handback objects see setNotificationListeners(NotificationListenerBean[]).

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()

setBeanFactory

public void setBeanFactory(BeanFactory beanFactory)

This callback is only required for resolution of bean names in the "beans" Map and for autodetection of MBeans (in the latter case, a ListableBeanFactory is required).

Specified by:

setBeanFactory in interface BeanFactoryAware

Parameters:

beanFactory - owning BeanFactory (never null). The bean can immediately call methods on the factory.

See Also:

setBeans(java.util.Map<java.lang.String, java.lang.Object>), setAutodetect(boolean)

afterPropertiesSet

public void afterPropertiesSet()

Start bean registration automatically when deployed in an ApplicationContext.

Specified by:

afterPropertiesSet in interface InitializingBean

See Also:

registerBeans()

destroy

public void destroy()

Unregisters all beans that this exported has exposed via JMX when the enclosing ApplicationContext is destroyed.

Specified by:

destroy in interface DisposableBean

registerManagedResource

public ObjectName registerManagedResource(Object managedResource)
                                   throws MBeanExportException

Description copied from interface: MBeanExportOperations

Register the supplied resource with JMX. If the resource is not a valid MBean already, Spring will generate a management interface for it. The exact interface generated will depend on the implementation and its configuration. This call also generates an ObjectName for the managed resource and returns this to the caller.

Specified by:

registerManagedResource in interface MBeanExportOperations

Parameters:

managedResource - the resource to expose via JMX

Returns:

the ObjectName under which the resource was exposed

Throws:

MBeanExportException - if Spring is unable to generate an ObjectName or register the MBean

registerManagedResource

public void registerManagedResource(Object managedResource,
                                    ObjectName objectName)
                             throws MBeanExportException

Description copied from interface: MBeanExportOperations

Register the supplied resource with JMX. If the resource is not a valid MBean already, Spring will generate a management interface for it. The exact interface generated will depend on the implementation and its configuration.

Specified by:

registerManagedResource in interface MBeanExportOperations

Parameters:

managedResource - the resource to expose via JMX

objectName - the ObjectName under which to expose the resource

Throws:

MBeanExportException - if Spring is unable to register the MBean

unregisterManagedResource

public void unregisterManagedResource(ObjectName objectName)

Description copied from interface: MBeanExportOperations

Remove the specified MBean from the underlying MBeanServer registry.

Specified by:

unregisterManagedResource in interface MBeanExportOperations

Parameters:

objectName - the ObjectName of the resource to remove

registerBeans

protected void registerBeans()

Registers the defined beans with the MBeanServer.

Each bean is exposed to the MBeanServer via a ModelMBean. The actual implemetation of the ModelMBean interface used depends on the implementation of the ModelMBeanProvider interface that is configured. By default the RequiredModelMBean class that is supplied with all JMX implementations is used.

The management interface produced for each bean is dependent on the MBeanInfoAssembler implementation being used. The ObjectName given to each bean is dependent on the implementation of the ObjectNamingStrategy interface being used.

isBeanDefinitionLazyInit

protected boolean isBeanDefinitionLazyInit(ListableBeanFactory beanFactory,
                                           String beanName)

Return whether the specified bean definition should be considered as lazy-init.

Parameters:

beanFactory - the bean factory that is supposed to contain the bean definition

beanName - the name of the bean to check

See Also:

ConfigurableListableBeanFactory.getBeanDefinition(java.lang.String), BeanDefinition.isLazyInit()

registerBeanNameOrInstance

protected ObjectName registerBeanNameOrInstance(Object mapValue,
                                                String beanKey)
                                         throws MBeanExportException

Registers an individual bean with the MBeanServer.

This method is responsible for deciding how a bean should be exposed to the MBeanServer. Specifically, if the supplied mapValue is the name of a bean that is configured for lazy initialization, then a proxy to the resource is registered with the MBeanServer so that the the lazy load behavior is honored. If the bean is already an MBean then it will be registered directly with the MBeanServer without any intervention. For all other beans or bean names, the resource itself is registered with the MBeanServer directly.

Parameters:

mapValue - the value configured for this bean in the beans map; may be either the String name of a bean, or the bean itself

beanKey - the key associated with this bean in the beans map

Returns:

the ObjectName under which the resource was registered

Throws:

MBeanExportException - if the export failed

See Also:

setBeans(java.util.Map<java.lang.String, java.lang.Object>), registerBeanInstance(java.lang.Object, java.lang.String), registerLazyInit(java.lang.String, java.lang.String)

getObjectName

protected ObjectName getObjectName(Object bean,
                                   String beanKey)
                            throws MalformedObjectNameException

Retrieve the ObjectName for a bean.

If the bean implements the SelfNaming interface, then the ObjectName will be retrieved using SelfNaming.getObjectName(). Otherwise, the configured ObjectNamingStrategy is used.

Parameters:

bean - the name of the bean in the BeanFactory

beanKey - the key associated with the bean in the beans map

Returns:

the ObjectName for the supplied bean

Throws:

MalformedObjectNameException - if the retrieved ObjectName is malformed

isMBean

protected boolean isMBean(Class<?> beanClass)

Determine whether the given bean class qualifies as an MBean as-is.

The default implementation delegates to JmxUtils.isMBean(java.lang.Class<?>), which checks for DynamicMBean classes as well as classes with corresponding "*MBean" interface (Standard MBeans) or corresponding "*MXBean" interface (Java 6 MXBeans).

Parameters:

beanClass - the bean class to analyze

Returns:

whether the class qualifies as an MBean

See Also:

JmxUtils.isMBean(Class)

adaptMBeanIfPossible

protected DynamicMBean adaptMBeanIfPossible(Object bean)
                                     throws JMException

Build an adapted MBean for the given bean instance, if possible.

The default implementation builds a JMX 1.2 StandardMBean for the target's MBean/MXBean interface in case of an AOP proxy, delegating the interface's management operations to the proxy.

Parameters:

bean - the original bean instance

Returns:

the adapted MBean, or null if not possible

Throws:

JMException

createAndConfigureMBean

protected ModelMBean createAndConfigureMBean(Object managedResource,
                                             String beanKey)
                                      throws MBeanExportException

Creates an MBean that is configured with the appropriate management interface for the supplied managed resource.

Parameters:

managedResource - the resource that is to be exported as an MBean

beanKey - the key associated with the managed bean

Throws:

MBeanExportException

See Also:

createModelMBean(), getMBeanInfo(Object, String)

createModelMBean

protected ModelMBean createModelMBean()
                               throws MBeanException

Create an instance of a class that implements ModelMBean.

This method is called to obtain a ModelMBean instance to use when registering a bean. This method is called once per bean during the registration phase and must return a new instance of ModelMBean

Returns:

a new instance of a class that implements ModelMBean

Throws:

MBeanException - if creation of the ModelMBean failed

onRegister

protected void onRegister(ObjectName objectName)

Called when an MBean is registered. Notifies all registered MBeanExporterListeners of the registration event.

Please note that if an MBeanExporterListener throws a (runtime) exception when notified, this will essentially interrupt the notification process and any remaining listeners that have yet to be notified will not (obviously) receive the MBeanExporterListener.mbeanRegistered(javax.management.ObjectName) callback.

Overrides:

onRegister in class MBeanRegistrationSupport

Parameters:

objectName - the ObjectName of the registered MBean

onUnregister

protected void onUnregister(ObjectName objectName)

Called when an MBean is unregistered. Notifies all registered MBeanExporterListeners of the unregistration event.

Please note that if an MBeanExporterListener throws a (runtime) exception when notified, this will essentially interrupt the notification process and any remaining listeners that have yet to be notified will not (obviously) receive the MBeanExporterListener.mbeanUnregistered(javax.management.ObjectName) callback.

Overrides:

onUnregister in class MBeanRegistrationSupport

Parameters:

objectName - the ObjectName of the unregistered MBean