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 JDK 1.5+ 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

Modifier and Type	Field and Description
private JmxAttributeSource	attributeSource

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 and 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 and Description
void	afterPropertiesSet() Invoked by a BeanFactory after it has set all bean properties supplied (and satisfied BeanFactoryAware and ApplicationContextAware).
protected void	checkManagedBean(java.lang.Object managedBean) Throws an IllegalArgumentException if it encounters a JDK dynamic proxy.
protected java.lang.String	getAttributeDescription(java.beans.PropertyDescriptor propertyDescriptor, java.lang.String beanKey) Creates a description for the attribute corresponding to this property descriptor.
protected java.lang.String	getDescription(java.lang.Object managedBean, java.lang.String beanKey) Reads managed resource description from the source level metadata.
protected javax.management.modelmbean.ModelMBeanNotificationInfo[]	getNotificationInfo(java.lang.Object managedBean, java.lang.String beanKey) Reads the ManagedNotification metadata from the Class of the managed resource and generates and returns the corresponding ModelMBeanNotificationInfo metadata.
protected java.lang.String	getOperationDescription(java.lang.reflect.Method method, java.lang.String beanKey) Retrieves the description for the supplied Method from the metadata.
protected javax.management.MBeanParameterInfo[]	getOperationParameters(java.lang.reflect.Method method, java.lang.String beanKey) Reads MBeanParameterInfo from the ManagedOperationParameter attributes attached to a method.
private boolean	hasManagedAttribute(java.lang.reflect.Method method) Checks to see if the given Method has the ManagedAttribute attribute.
private boolean	hasManagedMetric(java.lang.reflect.Method method) Checks to see if the given Method has the ManagedMetric attribute.
private boolean	hasManagedOperation(java.lang.reflect.Method method) Checks to see if the given Method has the ManagedOperation attribute.
boolean	includeBean(java.lang.Class<?> beanClass, java.lang.String beanName) Used for autodetection of beans.
protected boolean	includeOperation(java.lang.reflect.Method method, java.lang.String beanKey) Votes on the inclusion of an operation.
protected boolean	includeReadAttribute(java.lang.reflect.Method method, java.lang.String beanKey) Vote on the inclusion of an attribute accessor.
protected boolean	includeWriteAttribute(java.lang.reflect.Method method, java.lang.String beanKey) Votes on the inclusion of an attribute mutator.
private void	populateAttributeDescriptor(javax.management.Descriptor desc, ManagedAttribute gma, ManagedAttribute sma)
protected void	populateAttributeDescriptor(javax.management.Descriptor desc, java.lang.reflect.Method getter, java.lang.reflect.Method setter, java.lang.String beanKey) Adds descriptor fields from the ManagedAttribute attribute or the ManagedMetric attribute to the attribute descriptor.
protected void	populateMBeanDescriptor(javax.management.Descriptor desc, java.lang.Object managedBean, java.lang.String beanKey) Adds descriptor fields from the ManagedResource attribute to the MBean descriptor.
private void	populateMetricDescriptor(javax.management.Descriptor desc, ManagedMetric metric)
protected void	populateOperationDescriptor(javax.management.Descriptor desc, java.lang.reflect.Method method, java.lang.String beanKey) Adds descriptor fields from the ManagedAttribute attribute to the attribute descriptor.
private int	resolveIntDescriptor(int getter, int setter) Determines which of two int values should be used as the value for an attribute descriptor.
private java.lang.Object	resolveObjectDescriptor(java.lang.Object getter, java.lang.Object setter) Locates the value of a descriptor based on values attached to both the getter and setter methods.
private java.lang.String	resolveStringDescriptor(java.lang.String getter, java.lang.String setter) Locates the value of a descriptor based on values attached to both the getter and setter methods.
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

Field Detail

attributeSource

private JmxAttributeSource attributeSource

Constructor Detail

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 Detail

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 a BeanFactory after it has set all bean properties supplied (and satisfied BeanFactoryAware and ApplicationContextAware).

This method allows the bean instance to perform initialization only possible when all bean properties have been set and to throw an exception in the event of misconfiguration.

Specified by:

afterPropertiesSet in interface InitializingBean

checkManagedBean

protected void checkManagedBean(java.lang.Object managedBean)
                         throws java.lang.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:

java.lang.IllegalArgumentException - the bean is not valid for exposure

includeBean

public boolean includeBean(java.lang.Class<?> beanClass,
                           java.lang.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(java.lang.reflect.Method method,
                                       java.lang.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(java.lang.reflect.Method method,
                                        java.lang.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(java.lang.reflect.Method method,
                                   java.lang.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

hasManagedAttribute

private boolean hasManagedAttribute(java.lang.reflect.Method method)

Checks to see if the given Method has the ManagedAttribute attribute.

hasManagedMetric

private boolean hasManagedMetric(java.lang.reflect.Method method)

Checks to see if the given Method has the ManagedMetric attribute.

hasManagedOperation

private boolean hasManagedOperation(java.lang.reflect.Method method)

Checks to see if the given Method has the ManagedOperation attribute.

Parameters:

method - the method to check

getDescription

protected java.lang.String getDescription(java.lang.Object managedBean,
                                          java.lang.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 java.lang.String getAttributeDescription(java.beans.PropertyDescriptor propertyDescriptor,
                                                   java.lang.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 java.lang.String getOperationDescription(java.lang.reflect.Method method,
                                                   java.lang.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 javax.management.MBeanParameterInfo[] getOperationParameters(java.lang.reflect.Method method,
                                                                       java.lang.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 javax.management.modelmbean.ModelMBeanNotificationInfo[] getNotificationInfo(java.lang.Object managedBean,
                                                                                       java.lang.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(javax.management.Descriptor desc,
                                       java.lang.Object managedBean,
                                       java.lang.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(javax.management.Descriptor desc,
                                           java.lang.reflect.Method getter,
                                           java.lang.reflect.Method setter,
                                           java.lang.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)

populateAttributeDescriptor

private void populateAttributeDescriptor(javax.management.Descriptor desc,
                                         ManagedAttribute gma,
                                         ManagedAttribute sma)

populateMetricDescriptor

private void populateMetricDescriptor(javax.management.Descriptor desc,
                                      ManagedMetric metric)

populateOperationDescriptor

protected void populateOperationDescriptor(javax.management.Descriptor desc,
                                           java.lang.reflect.Method method,
                                           java.lang.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)

resolveIntDescriptor

private int resolveIntDescriptor(int getter,
                                 int setter)

Determines which of two int values should be used as the value for an attribute descriptor. In general, only the getter or the setter will be have a non-negative value so we use that value. In the event that both values are non-negative, we use the greater of the two. This method can be used to resolve any int valued descriptor where there are two possible values.

Parameters:

getter - the int value associated with the getter for this attribute

setter - the int associated with the setter for this attribute

resolveObjectDescriptor

private java.lang.Object resolveObjectDescriptor(java.lang.Object getter,
                                                 java.lang.Object setter)

Locates the value of a descriptor based on values attached to both the getter and setter methods. If both have values supplied then the value attached to the getter is preferred.

Parameters:

getter - the Object value associated with the get method

setter - the Object value associated with the set method

Returns:

the appropriate Object to use as the value for the descriptor

resolveStringDescriptor

private java.lang.String resolveStringDescriptor(java.lang.String getter,
                                                 java.lang.String setter)

Locates the value of a descriptor based on values attached to both the getter and setter methods. If both have values supplied then the value attached to the getter is preferred. The supplied default value is used to check to see if the value associated with the getter has changed from the default.

Parameters:

getter - the String value associated with the get method

setter - the String value associated with the set method

Returns:

the appropriate String to use as the value for the descriptor