Package org.springframework.jmx.export.assembler

Class MetadataMBeanInfoAssembler

java.lang.Object

org.springframework.jmx.export.assembler.AbstractMBeanInfoAssembler

org.springframework.jmx.export.assembler.AbstractReflectiveMBeanInfoAssembler

org.springframework.jmx.export.assembler.MetadataMBeanInfoAssembler

All Implemented Interfaces:

InitializingBean, AutodetectCapableMBeanInfoAssembler, MBeanInfoAssembler

public class MetadataMBeanInfoAssembler
extends AbstractReflectiveMBeanInfoAssembler
implements AutodetectCapableMBeanInfoAssembler, InitializingBean

Implementation of the MBeanInfoAssembler interface that reads the management interface information from source level metadata.

Uses the JmxAttributeSource strategy interface, so that metadata can be read using any supported implementation. Out of the box, Spring provides an implementation based on annotations: AnnotationJmxAttributeSource.

Since:

1.2

Author:

Rob Harrop, Juergen Hoeller, Jennifer Hickey

See Also:

• setAttributeSource(org.springframework.jmx.export.metadata.JmxAttributeSource)
• AnnotationJmxAttributeSource

Field Summary

Fields inherited from class org.springframework.jmx.export.assembler.AbstractReflectiveMBeanInfoAssembler

ATTRIBUTE_OPERATION_VISIBILITY, FIELD_CLASS, FIELD_CURRENCY_TIME_LIMIT, FIELD_DEFAULT, FIELD_DISPLAY_NAME, FIELD_GET_METHOD, FIELD_LOG, FIELD_LOG_FILE, FIELD_METRIC_CATEGORY, FIELD_METRIC_TYPE, FIELD_PERSIST_LOCATION, FIELD_PERSIST_NAME, FIELD_PERSIST_PERIOD, FIELD_PERSIST_POLICY, FIELD_ROLE, FIELD_SET_METHOD, FIELD_UNITS, FIELD_VISIBILITY, ROLE_GETTER, ROLE_OPERATION, ROLE_SETTER

Constructor Summary

Constructors

Constructor	Description
MetadataMBeanInfoAssembler()	Create a new MetadataMBeanInfoAssembler which needs to be configured through the setAttributeSource(org.springframework.jmx.export.metadata.JmxAttributeSource) method.
MetadataMBeanInfoAssembler(JmxAttributeSource attributeSource)	Create a new MetadataMBeanInfoAssembler for the given JmxAttributeSource.

Method Summary

Modifier and Type	Method	Description
void	afterPropertiesSet()	Invoked by the containing BeanFactory after it has set all bean properties and satisfied BeanFactoryAware, ApplicationContextAware etc.
protected void	checkManagedBean(Object managedBean)	Throws an IllegalArgumentException if it encounters a JDK dynamic proxy.
protected String	getAttributeDescription(PropertyDescriptor propertyDescriptor, String beanKey)	Creates a description for the attribute corresponding to this property descriptor.
protected String	getDescription(Object managedBean, String beanKey)	Reads managed resource description from the source level metadata.
protected ModelMBeanNotificationInfo[]	getNotificationInfo(Object managedBean, String beanKey)	Reads the ManagedNotification metadata from the Class of the managed resource and generates and returns the corresponding ModelMBeanNotificationInfo metadata.
protected String	getOperationDescription(Method method, String beanKey)	Retrieves the description for the supplied Method from the metadata.
protected MBeanParameterInfo[]	getOperationParameters(Method method, String beanKey)	Reads MBeanParameterInfo from the ManagedOperationParameter attributes attached to a method.
boolean	includeBean(Class<?> beanClass, String beanName)	Used for autodetection of beans.
protected boolean	includeOperation(Method method, String beanKey)	Votes on the inclusion of an operation.
protected boolean	includeReadAttribute(Method method, String beanKey)	Vote on the inclusion of an attribute accessor.
protected boolean	includeWriteAttribute(Method method, String beanKey)	Votes on the inclusion of an attribute mutator.
protected void	populateAttributeDescriptor(Descriptor desc, Method getter, Method setter, String beanKey)	Adds descriptor fields from the ManagedAttribute attribute or the ManagedMetric attribute to the attribute descriptor.
protected void	populateMBeanDescriptor(Descriptor desc, Object managedBean, String beanKey)	Adds descriptor fields from the ManagedResource attribute to the MBean descriptor.
protected void	populateOperationDescriptor(Descriptor desc, Method method, String beanKey)	Adds descriptor fields from the ManagedAttribute attribute to the attribute descriptor.
void	setAttributeSource(JmxAttributeSource attributeSource)	Set the JmxAttributeSource implementation to use for reading the metadata from the bean class.

Methods inherited from class org.springframework.jmx.export.assembler.AbstractReflectiveMBeanInfoAssembler

applyCurrencyTimeLimit, applyDefaultCurrencyTimeLimit, createModelMBeanOperationInfo, getAttributeInfo, getClassForDescriptor, getDefaultCurrencyTimeLimit, getOperationInfo, getParameterNameDiscoverer, isExposeClassDescriptor, isUseStrictCasing, setDefaultCurrencyTimeLimit, setExposeClassDescriptor, setParameterNameDiscoverer, setUseStrictCasing

Methods inherited from class org.springframework.jmx.export.assembler.AbstractMBeanInfoAssembler

getClassName, getClassToExpose, getClassToExpose, getConstructorInfo, getMBeanInfo, getTargetClass

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.springframework.jmx.export.assembler.MBeanInfoAssembler

getMBeanInfo

Constructor Details

MetadataMBeanInfoAssembler

public MetadataMBeanInfoAssembler()

Create a new MetadataMBeanInfoAssembler which needs to be configured through the setAttributeSource(org.springframework.jmx.export.metadata.JmxAttributeSource) method.

MetadataMBeanInfoAssembler

public MetadataMBeanInfoAssembler(JmxAttributeSource attributeSource)

Create a new MetadataMBeanInfoAssembler for the given JmxAttributeSource.

Parameters:

attributeSource - the JmxAttributeSource to use

Method Details

setAttributeSource

public void setAttributeSource(JmxAttributeSource attributeSource)

Set the JmxAttributeSource implementation to use for reading the metadata from the bean class.

See Also:

• AnnotationJmxAttributeSource

afterPropertiesSet

public void afterPropertiesSet()

Description copied from interface: InitializingBean

Invoked by the containing BeanFactory after it has set all bean properties and satisfied BeanFactoryAware, ApplicationContextAware etc.

This method allows the bean instance to perform validation of its overall configuration and final initialization when all bean properties have been set.

Specified by:

afterPropertiesSet in interface InitializingBean

checkManagedBean

protected void checkManagedBean(Object managedBean)
                         throws IllegalArgumentException

Throws an IllegalArgumentException if it encounters a JDK dynamic proxy. Metadata can only be read from target classes and CGLIB proxies!

Overrides:

checkManagedBean in class AbstractMBeanInfoAssembler

Parameters:

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

Throws:

IllegalArgumentException - the bean is not valid for exposure

includeBean

public boolean includeBean(Class<?> beanClass,
 String beanName)

Used for autodetection of beans. Checks to see if the bean's class has a ManagedResource attribute. If so it will add it list of included beans.

Specified by:

includeBean in interface AutodetectCapableMBeanInfoAssembler

Parameters:

beanClass - the class of the bean

beanName - the name of the bean in the bean factory

includeReadAttribute

protected boolean includeReadAttribute(Method method,
 String beanKey)

Vote on the inclusion of an attribute accessor.

Specified by:

includeReadAttribute in class AbstractReflectiveMBeanInfoAssembler

Parameters:

method - the accessor method

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

Returns:

whether the method has the appropriate metadata

includeWriteAttribute

protected boolean includeWriteAttribute(Method method,
 String beanKey)

Votes on the inclusion of an attribute mutator.

Specified by:

includeWriteAttribute in class AbstractReflectiveMBeanInfoAssembler

Parameters:

method - the mutator method

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

Returns:

whether the method has the appropriate metadata

includeOperation

protected boolean includeOperation(Method method,
 String beanKey)

Votes on the inclusion of an operation.

Specified by:

includeOperation in class AbstractReflectiveMBeanInfoAssembler

Parameters:

method - the operation method

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

Returns:

whether the method has the appropriate metadata

getDescription

protected String getDescription(Object managedBean,
 String beanKey)

Reads managed resource description from the source level metadata. Returns an empty String if no description can be found.

Overrides:

getDescription in class AbstractMBeanInfoAssembler

Parameters:

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

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

getAttributeDescription

protected String getAttributeDescription(PropertyDescriptor propertyDescriptor,
 String beanKey)

Creates a description for the attribute corresponding to this property descriptor. Attempts to create the description using metadata from either the getter or setter attributes, otherwise uses the property name.

Overrides:

getAttributeDescription in class AbstractReflectiveMBeanInfoAssembler

Parameters:

propertyDescriptor - the PropertyDescriptor for the attribute

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

Returns:

the description for the attribute

getOperationDescription

protected String getOperationDescription(Method method,
 String beanKey)

Retrieves the description for the supplied Method from the metadata. Uses the method name is no description is present in the metadata.

Overrides:

getOperationDescription in class AbstractReflectiveMBeanInfoAssembler

Parameters:

method - the operation method

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

Returns:

the description for the operation

getOperationParameters

protected MBeanParameterInfo[] getOperationParameters(Method method,
 String beanKey)

Reads MBeanParameterInfo from the ManagedOperationParameter attributes attached to a method. Returns an empty array of MBeanParameterInfo if no attributes are found.

Overrides:

getOperationParameters in class AbstractReflectiveMBeanInfoAssembler

Parameters:

method - the Method to get the parameter information for

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

Returns:

the MBeanParameterInfo array

getNotificationInfo

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

Reads the ManagedNotification metadata from the Class of the managed resource and generates and returns the corresponding ModelMBeanNotificationInfo metadata.

Overrides:

getNotificationInfo in class AbstractMBeanInfoAssembler

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

populateMBeanDescriptor

protected void populateMBeanDescriptor(Descriptor desc,
 Object managedBean,
 String beanKey)

Adds descriptor fields from the ManagedResource attribute to the MBean descriptor. Specifically, adds the currencyTimeLimit, persistPolicy, persistPeriod, persistLocation and persistName descriptor fields if they are present in the metadata.

Overrides:

populateMBeanDescriptor in class AbstractReflectiveMBeanInfoAssembler

Parameters:

desc - 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

See Also:

• AbstractReflectiveMBeanInfoAssembler.setDefaultCurrencyTimeLimit(Integer)
• AbstractReflectiveMBeanInfoAssembler.applyDefaultCurrencyTimeLimit(javax.management.Descriptor)

populateAttributeDescriptor

protected void populateAttributeDescriptor(Descriptor desc,
 @Nullable
 Method getter,
 @Nullable
 Method setter,
 String beanKey)

Adds descriptor fields from the ManagedAttribute attribute or the ManagedMetric attribute to the attribute descriptor.

Overrides:

populateAttributeDescriptor in class AbstractReflectiveMBeanInfoAssembler

Parameters:

desc - the attribute descriptor

getter - the accessor method for the attribute

setter - the mutator method for the attribute

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

See Also:

• AbstractReflectiveMBeanInfoAssembler.setDefaultCurrencyTimeLimit(Integer)
• AbstractReflectiveMBeanInfoAssembler.applyDefaultCurrencyTimeLimit(javax.management.Descriptor)

populateOperationDescriptor

protected void populateOperationDescriptor(Descriptor desc,
 Method method,
 String beanKey)

Adds descriptor fields from the ManagedAttribute attribute to the attribute descriptor. Specifically, adds the currencyTimeLimit descriptor field if it is present in the metadata.

Overrides:

populateOperationDescriptor in class AbstractReflectiveMBeanInfoAssembler

Parameters:

desc - the operation descriptor

method - the method corresponding to the operation

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

See Also:

• AbstractReflectiveMBeanInfoAssembler.setDefaultCurrencyTimeLimit(Integer)
• AbstractReflectiveMBeanInfoAssembler.applyDefaultCurrencyTimeLimit(javax.management.Descriptor)