mx4j.server

Class ReflectionMBeanInvoker

java.lang.Object

mx4j.server.ReflectionMBeanInvoker

All Implemented Interfaces:

MBeanInvoker

Direct Known Subclasses:

CachingReflectionMBeanInvoker

public class ReflectionMBeanInvoker
extends java.lang.Object
implements MBeanInvoker

Stateless MBeanInvoker that uses reflection to invoke on MBean instances.

Version:

$Revision: 1.6 $

Field Summary

Fields

Modifier and Type	Field and Description
protected static java.lang.Object[]	EMPTY_ARGS A zero-length Object[] that indicates a parameterless argument list of a method
protected static java.lang.String[]	EMPTY_PARAMS A zero-length String[] that indicates a parameterless signature of a method.

Constructor Summary

Constructors

Constructor and Description
ReflectionMBeanInvoker()

Method Summary

Modifier and Type	Method and Description
protected java.lang.Object	doInvoke(MBeanMetaData metadata, java.lang.String method, java.lang.String[] signature, java.lang.Object[] args) Centralizes exception handling necessary to convert exceptions thrown by MBean's methods to JMX exceptions.
java.lang.Object	getAttribute(MBeanMetaData metadata, java.lang.String attribute) Returns the value of the specified attribute.
protected java.lang.String	getMethodForAttribute(javax.management.MBeanAttributeInfo attribute, boolean forRead) Returns the method name for the given attribute.
protected javax.management.MBeanAttributeInfo	getStandardAttributeInfo(MBeanMetaData metadata, java.lang.String attribute, boolean forWrite) Returns the MBeanAttributeInfo for the given attribute, or null if the attribute is not a management attribute.
protected java.lang.reflect.Method	getStandardManagementMethod(MBeanMetaData metadata, java.lang.String name, java.lang.String[] signature) Returns a java.lang.reflect.Method object for the given method name and signature.
protected javax.management.MBeanOperationInfo	getStandardOperationInfo(MBeanMetaData metadata, java.lang.String method, java.lang.String[] signature) Returns the MBeanOperationInfo for the given operation, or null if the operation is not a management operation.
java.lang.Object	invoke(MBeanMetaData metadata, java.lang.String method, java.lang.String[] params, java.lang.Object[] args) Invokes the specified operation on the MBean instance
protected java.lang.Object	invokeImpl(MBeanMetaData metadata, java.lang.String method, java.lang.String[] signature, java.lang.Object[] args) Performs the actual invocation of the MBean's method.
void	setAttribute(MBeanMetaData metadata, javax.management.Attribute attribute) Sets the value of the specified attribute.

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY_PARAMS

protected static final java.lang.String[] EMPTY_PARAMS

A zero-length String[] that indicates a parameterless signature of a method.

EMPTY_ARGS

protected static final java.lang.Object[] EMPTY_ARGS

A zero-length Object[] that indicates a parameterless argument list of a method

Constructor Detail

ReflectionMBeanInvoker

public ReflectionMBeanInvoker()

Method Detail

invoke

public java.lang.Object invoke(MBeanMetaData metadata,
                               java.lang.String method,
                               java.lang.String[] params,
                               java.lang.Object[] args)
                        throws javax.management.MBeanException,
                               javax.management.ReflectionException

Description copied from interface: MBeanInvoker

Invokes the specified operation on the MBean instance

Specified by:

invoke in interface MBeanInvoker

Throws:

javax.management.MBeanException

javax.management.ReflectionException

getAttribute

public java.lang.Object getAttribute(MBeanMetaData metadata,
                                     java.lang.String attribute)
                              throws javax.management.MBeanException,
                                     javax.management.AttributeNotFoundException,
                                     javax.management.ReflectionException

Description copied from interface: MBeanInvoker

Returns the value of the specified attribute.

Specified by:

getAttribute in interface MBeanInvoker

Throws:

javax.management.MBeanException

javax.management.AttributeNotFoundException

javax.management.ReflectionException

setAttribute

public void setAttribute(MBeanMetaData metadata,
                         javax.management.Attribute attribute)
                  throws javax.management.MBeanException,
                         javax.management.AttributeNotFoundException,
                         javax.management.InvalidAttributeValueException,
                         javax.management.ReflectionException

Description copied from interface: MBeanInvoker

Sets the value of the specified attribute.

Specified by:

setAttribute in interface MBeanInvoker

Throws:

javax.management.MBeanException

javax.management.AttributeNotFoundException

javax.management.InvalidAttributeValueException

javax.management.ReflectionException

doInvoke

protected java.lang.Object doInvoke(MBeanMetaData metadata,
                                    java.lang.String method,
                                    java.lang.String[] signature,
                                    java.lang.Object[] args)
                             throws javax.management.ReflectionException,
                                    javax.management.MBeanException,
                                    mx4j.server.ReflectionMBeanInvoker.BadArgumentException

Centralizes exception handling necessary to convert exceptions thrown by MBean's methods to JMX exceptions. Delegates the actual invocation to invokeImpl(mx4j.server.MBeanMetaData, java.lang.String, java.lang.String[], java.lang.Object[])

Throws:

javax.management.ReflectionException

javax.management.MBeanException

mx4j.server.ReflectionMBeanInvoker.BadArgumentException

invokeImpl

protected java.lang.Object invokeImpl(MBeanMetaData metadata,
                                      java.lang.String method,
                                      java.lang.String[] signature,
                                      java.lang.Object[] args)
                               throws java.lang.Throwable

Performs the actual invocation of the MBean's method. Exceptions thrown by the MBean's methods should not be catched, since doInvoke(mx4j.server.MBeanMetaData, java.lang.String, java.lang.String[], java.lang.Object[]) takes care of converting them to JMX exceptions.

Throws:

java.lang.Throwable

getStandardOperationInfo

protected javax.management.MBeanOperationInfo getStandardOperationInfo(MBeanMetaData metadata,
                                                                       java.lang.String method,
                                                                       java.lang.String[] signature)

Returns the MBeanOperationInfo for the given operation, or null if the operation is not a management operation.

getStandardAttributeInfo

protected javax.management.MBeanAttributeInfo getStandardAttributeInfo(MBeanMetaData metadata,
                                                                       java.lang.String attribute,
                                                                       boolean forWrite)

Returns the MBeanAttributeInfo for the given attribute, or null if the attribute is not a management attribute.

getMethodForAttribute

protected java.lang.String getMethodForAttribute(javax.management.MBeanAttributeInfo attribute,
                                                 boolean forRead)

Returns the method name for the given attribute.

getStandardManagementMethod

protected java.lang.reflect.Method getStandardManagementMethod(MBeanMetaData metadata,
                                                               java.lang.String name,
                                                               java.lang.String[] signature)
                                                        throws javax.management.ReflectionException

Returns a java.lang.reflect.Method object for the given method name and signature.

Throws:

javax.management.ReflectionException