org.springframework.jmx.support
Class JmxUtils

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

public abstract class JmxUtils
extends Object

Collection of generic utility methods to support Spring JMX. Includes a convenient method to locate an MBeanServer.

Since:

1.2

Author:

Rob Harrop, Juergen Hoeller

Field Summary

static String

IDENTITY_OBJECT_NAME_KEY The key used when extending an existing ObjectName with the identity hash code of its corresponding managed resource.

Constructor Summary

JmxUtils()

Method Summary

static ObjectName	appendIdentityToObjectName(ObjectName objectName, Object managedResource) Append an additional key/value pair to an existing ObjectName with the key being the static value identity and the value being the identity hash code of the managed resource being exposed on the supplied ObjectName.
static String	getAttributeName(PropertyDescriptor property, boolean useStrictCasing) Return the JMX attribute name to use for the given JavaBeans property.
static Class	getClassToExpose(Class beanClass) Return the class or interface to expose for the given bean class.
static Class	getClassToExpose(Object managedBean) Return the class or interface to expose for the given bean.
static String[]	getMethodSignature(Method method) Create a String[] representing the signature of a method.
static boolean	isMBean(Class beanClass) Check whether the supplied Class is a valid MBean resource.
static MBeanServer	locateMBeanServer() Attempt to find a locally running MBeanServer.
static MBeanServer	locateMBeanServer(String agentId) Attempt to find a locally running MBeanServer.
static Class[]	parameterInfoToTypes(MBeanParameterInfo[] paramInfo) Convert an array of MBeanParameterInfo into an array of Class instances corresponding to the parameters.

Methods inherited from class java.lang.Object

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

Field Detail

IDENTITY_OBJECT_NAME_KEY

public static final String IDENTITY_OBJECT_NAME_KEY

The key used when extending an existing ObjectName with the identity hash code of its corresponding managed resource.

See Also:

Constant Field Values

Constructor Detail

JmxUtils

public JmxUtils()

Method Detail

locateMBeanServer

public static MBeanServer locateMBeanServer()
                                     throws MBeanServerNotFoundException

Attempt to find a locally running MBeanServer. Fails if no MBeanServer can be found. Logs a warning if more than one MBeanServer found, returning the first one from the list.

Returns:

the MBeanServer if found

Throws:

MBeanServerNotFoundException - if no MBeanServer could be found

See Also:

MBeanServerFactory.findMBeanServer(java.lang.String)

locateMBeanServer

public static MBeanServer locateMBeanServer(String agentId)
                                     throws MBeanServerNotFoundException

Attempt to find a locally running MBeanServer. Fails if no MBeanServer can be found. Logs a warning if more than one MBeanServer found, returning the first one from the list.

Parameters:

agentId - the agent identifier of the MBeanServer to retrieve. If this parameter is null, all registered MBeanServers are considered.

Returns:

the MBeanServer if found

Throws:

MBeanServerNotFoundException - if no MBeanServer could be found

See Also:

MBeanServerFactory.findMBeanServer(String)

parameterInfoToTypes

public static Class[] parameterInfoToTypes(MBeanParameterInfo[] paramInfo)
                                    throws ClassNotFoundException

Convert an array of MBeanParameterInfo into an array of Class instances corresponding to the parameters.

Throws:

ClassNotFoundException

getMethodSignature

public static String[] getMethodSignature(Method method)

Create a String[] representing the signature of a method. Each element in the array is the fully qualified class name of the corresponding argument in the methods signature.

getAttributeName

public static String getAttributeName(PropertyDescriptor property,
                                      boolean useStrictCasing)

Return the JMX attribute name to use for the given JavaBeans property.

When using strict casing, a JavaBean property with a getter method such as getFoo() translates to an attribute called Foo. With strict casing disabled, getFoo() would translate to just foo.

Parameters:

property - the JavaBeans property descriptor

useStrictCasing - whether to use strict casing

Returns:

the JMX attribute name to use

isMBean

public static boolean isMBean(Class beanClass)

Check whether the supplied Class is a valid MBean resource.

Parameters:

beanClass - the class of the bean to test

getClassToExpose

public static Class getClassToExpose(Object managedBean)

Return the class or interface to expose for the given bean. This is the class that will be searched for attributes and operations (for example, checked for annotations).

Default implementation returns the target class for a CGLIB proxy, and the class of the given bean else (for a JDK proxy or a plain bean class).

Parameters:

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

Returns:

the bean class to expose

See Also:

AopUtils.isCglibProxy(Object), Advised.getTargetSource(), TargetSource.getTargetClass()

getClassToExpose

public static Class getClassToExpose(Class beanClass)

Return the class or interface to expose for the given bean class. This is the class that will be searched for attributes and operations (for example, checked for annotations).

Default implementation returns the superclass for a CGLIB proxy, and the given bean class else (for a JDK proxy or a plain bean class).

Parameters:

beanClass - the bean class (might be an AOP proxy class)

Returns:

the bean class to expose

See Also:

AopUtils.isCglibProxyClass(Class)

appendIdentityToObjectName

public static ObjectName appendIdentityToObjectName(ObjectName objectName,
                                                    Object managedResource)
                                             throws MalformedObjectNameException

Append an additional key/value pair to an existing ObjectName with the key being the static value identity and the value being the identity hash code of the managed resource being exposed on the supplied ObjectName. This can be used to provide a unique ObjectName for each distinct instance of a particular bean or class. Useful when generating ObjectNames at runtime for a set of managed resources based on the template value supplied by a ObjectNamingStrategy.

Throws:

MalformedObjectNameException