MBeanClientInterceptor

java.lang.Object
- org.springframework.jmx.access.MBeanClientInterceptor

All Implemented Interfaces:

Aware, BeanClassLoaderAware, DisposableBean, InitializingBean

Direct Known Subclasses:

MBeanProxyFactoryBean
```
public class MBeanClientInterceptor
extends java.lang.Object
implements BeanClassLoaderAware, InitializingBean, DisposableBean
```
org.aopalliance.intercept.MethodInterceptor that routes calls to an MBean running on the supplied MBeanServerConnection. Works for both local and remote MBeanServerConnections.
By default, the MBeanClientInterceptor will connect to the MBeanServer and cache MBean metadata at startup. This can be undesirable when running against a remote MBeanServer that may not be running when the application starts. Through setting the connectOnStartup property to "false", you can defer this process until the first invocation against the proxy.
This functionality is usually used through MBeanProxyFactoryBean. See the javadoc of that class for more information.

Since:

1.2

Author:

Rob Harrop, Juergen Hoeller

See Also:

MBeanProxyFactoryBean, setConnectOnStartup(boolean)

Nested Class Summary

Nested Classes
Modifier and Type Class and Description

private static class MBeanClientInterceptor.MethodCacheKey
Simple wrapper class around a method name and its signature.

Nested Classes
Modifier and Type	Class and Description
`private static class`	`MBeanClientInterceptor.MethodCacheKey` Simple wrapper class around a method name and its signature.

Field Summary

Fields
Modifier and Type	Field and Description
`private java.lang.String`	`agentId`
`private java.util.Map<java.lang.String,javax.management.MBeanAttributeInfo>`	`allowedAttributes`
`private java.util.Map<MBeanClientInterceptor.MethodCacheKey,javax.management.MBeanOperationInfo>`	`allowedOperations`
`private java.lang.ClassLoader`	`beanClassLoader`
`private boolean`	`connectOnStartup`
`private ConnectorDelegate`	`connector`
`private java.util.Map<java.lang.String,?>`	`environment`
`private javax.management.MBeanServerInvocationHandler`	`invocationHandler`
`protected Log`	`logger` Logger available to subclasses
`private java.lang.Class<?>`	`managementInterface`
`private javax.management.ObjectName`	`objectName`
`private java.lang.Object`	`preparationMonitor`
`private boolean`	`refreshOnConnectFailure`
`private javax.management.MBeanServerConnection`	`server`
`private javax.management.MBeanServerConnection`	`serverToUse`
`private javax.management.remote.JMXServiceURL`	`serviceUrl`
`private java.util.Map<java.lang.reflect.Method,java.lang.String[]>`	`signatureCache`
`private boolean`	`useStrictCasing`

Constructor Summary

Constructors
Constructor and Description

MBeanClientInterceptor()

Constructors
Constructor and Description
`MBeanClientInterceptor()`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`afterPropertiesSet()` Prepares the `MBeanServerConnection` if the "connectOnStartup" is turned on (which it is by default).
`private java.lang.Object`	`convertDataArrayToTargetArray(java.lang.Object[] array, java.lang.Class<?> targetClass)`
`private java.util.Collection<?>`	`convertDataArrayToTargetCollection(java.lang.Object[] array, java.lang.Class<?> collectionType, java.lang.Class<?> elementType)`
`protected java.lang.Object`	`convertResultValueIfNecessary(java.lang.Object result, MethodParameter parameter)` Convert the given result object (from attribute access or operation invocation) to the specified target class for returning from the proxy method.
`void`	`destroy()` Invoked by a BeanFactory on destruction of a singleton.
`protected java.lang.Object`	`doInvoke(MethodInvocation invocation)` Route the invocation to the configured managed resource.
`java.util.Map<java.lang.String,?>`	`getEnvironment()` Allow Map access to the environment to be set for the connector, with the option to add or override specific entries.
`protected java.lang.Class<?>`	`getManagementInterface()` Return the management interface of the target MBean, or `null` if none specified.
`protected java.lang.Object`	`handleConnectFailure(MethodInvocation invocation, java.lang.Exception ex)` Refresh the connection and retry the MBean invocation if possible.
`java.lang.Object`	`invoke(MethodInvocation invocation)` Route the invocation to the configured managed resource..
`private java.lang.Object`	`invokeAttribute(java.beans.PropertyDescriptor pd, MethodInvocation invocation)`
`private java.lang.Object`	`invokeOperation(java.lang.reflect.Method method, java.lang.Object[] args)` Routes a method invocation (not a property get/set) to the corresponding operation on the managed resource.
`protected boolean`	`isPrepared()` Return whether this client interceptor has already been prepared, i.e.
`void`	`prepare()` Ensures that an `MBeanServerConnection` is configured and attempts to detect a local connection if one is not supplied.
`private void`	`retrieveMBeanInfo()` Loads the management interface info for the configured MBean into the caches.
`void`	`setAgentId(java.lang.String agentId)` Set the agent id of the `MBeanServer` to locate.
`void`	`setBeanClassLoader(java.lang.ClassLoader beanClassLoader)` Callback that supplies the bean `class loader` to a bean instance.
`void`	`setConnectOnStartup(boolean connectOnStartup)` Set whether or not the proxy should connect to the `MBeanServer` at creation time ("true") or the first time it is invoked ("false").
`void`	`setEnvironment(java.util.Map<java.lang.String,?> environment)` Specify the environment for the JMX connector.
`void`	`setManagementInterface(java.lang.Class<?> managementInterface)` Set the management interface of the target MBean, exposing bean property setters and getters for MBean attributes and conventional Java methods for MBean operations.
`void`	`setObjectName(java.lang.Object objectName)` Set the `ObjectName` of the MBean which calls are routed to, as `ObjectName` instance or as `String`.
`void`	`setRefreshOnConnectFailure(boolean refreshOnConnectFailure)` Set whether to refresh the MBeanServer connection on connect failure.
`void`	`setServer(javax.management.MBeanServerConnection server)` Set the `MBeanServerConnection` used to connect to the MBean which all invocations are routed to.
`void`	`setServiceUrl(java.lang.String url)` Set the service URL of the remote `MBeanServer`.
`void`	`setUseStrictCasing(boolean useStrictCasing)` Set whether to use strict casing for attributes.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - logger
```
protected final Log logger
```
    Logger available to subclasses
  - server
```
private javax.management.MBeanServerConnection server
```
  - serviceUrl
```
private javax.management.remote.JMXServiceURL serviceUrl
```
  - environment
```
private java.util.Map<java.lang.String,?> environment
```
  - agentId
```
private java.lang.String agentId
```
  - connectOnStartup
```
private boolean connectOnStartup
```
  - refreshOnConnectFailure
```
private boolean refreshOnConnectFailure
```
  - objectName
```
private javax.management.ObjectName objectName
```
  - useStrictCasing
```
private boolean useStrictCasing
```
  - managementInterface
```
private java.lang.Class<?> managementInterface
```
  - beanClassLoader
```
private java.lang.ClassLoader beanClassLoader
```
  - connector
```
private final ConnectorDelegate connector
```
  - serverToUse
```
private javax.management.MBeanServerConnection serverToUse
```
  - invocationHandler
```
private javax.management.MBeanServerInvocationHandler invocationHandler
```
  - allowedAttributes
```
private java.util.Map<java.lang.String,javax.management.MBeanAttributeInfo> allowedAttributes
```
  - allowedOperations
```
private java.util.Map<MBeanClientInterceptor.MethodCacheKey,javax.management.MBeanOperationInfo> allowedOperations
```
  - signatureCache
```
private final java.util.Map<java.lang.reflect.Method,java.lang.String[]> signatureCache
```
  - preparationMonitor
```
private final java.lang.Object preparationMonitor
```
- Constructor Detail
  - MBeanClientInterceptor
```
public MBeanClientInterceptor()
```
- Method Detail
  - setServer
```
public void setServer(javax.management.MBeanServerConnection server)
```
    Set the MBeanServerConnection used to connect to the MBean which all invocations are routed to.
  - setServiceUrl
```
public void setServiceUrl(java.lang.String url)
                   throws java.net.MalformedURLException
```
    Set the service URL of the remote MBeanServer.
    
    Throws:
    
    java.net.MalformedURLException
  - setEnvironment
```
public void setEnvironment(java.util.Map<java.lang.String,?> environment)
```
    Specify the environment for the JMX connector.
    
    See Also:
    
    JMXConnectorFactory.connect(javax.management.remote.JMXServiceURL, java.util.Map)
  - getEnvironment
```
public java.util.Map<java.lang.String,?> getEnvironment()
```
    Allow Map access to the environment to be set for the connector, with the option to add or override specific entries.
    Useful for specifying entries directly, for example via "environment[myKey]". This is particularly useful for adding or overriding entries in child bean definitions.
  - setAgentId
```
public void setAgentId(java.lang.String agentId)
```
    Set the agent id of the MBeanServer to locate.
    Default is none. If specified, this will result in an attempt being made to locate the attendant MBeanServer, unless the "serviceUrl" property has been set.
    
    See Also:
    
    Specifying the empty String indicates the platform MBeanServer.
  - setConnectOnStartup
```
public void setConnectOnStartup(boolean connectOnStartup)
```
    Set whether or not the proxy should connect to the MBeanServer at creation time ("true") or the first time it is invoked ("false"). Default is "true".
  - setRefreshOnConnectFailure
```
public void setRefreshOnConnectFailure(boolean refreshOnConnectFailure)
```
    Set whether to refresh the MBeanServer connection on connect failure. Default is "false".
    Can be turned on to allow for hot restart of the JMX server, automatically reconnecting and retrying in case of an IOException.
  - setObjectName
```
public void setObjectName(java.lang.Object objectName)
                   throws javax.management.MalformedObjectNameException
```
    Set the ObjectName of the MBean which calls are routed to, as ObjectName instance or as String.
    
    Throws:
    
    javax.management.MalformedObjectNameException
  - setUseStrictCasing
```
public void setUseStrictCasing(boolean useStrictCasing)
```
    Set whether to use strict casing for attributes. Enabled by default.
    When using strict casing, a JavaBean property with a getter such as getFoo() translates to an attribute called Foo. With strict casing disabled, getFoo() would translate to just foo.
  - setManagementInterface
```
public void setManagementInterface(java.lang.Class<?> managementInterface)
```
    Set the management interface of the target MBean, exposing bean property setters and getters for MBean attributes and conventional Java methods for MBean operations.
  - getManagementInterface
```
protected final java.lang.Class<?> getManagementInterface()
```
    Return the management interface of the target MBean, or null if none specified.
  - setBeanClassLoader
```
public void setBeanClassLoader(java.lang.ClassLoader beanClassLoader)
```
    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:
    
    beanClassLoader - the owning class loader; may be null in which case a default ClassLoader must be used, for example the ClassLoader obtained via ClassUtils.getDefaultClassLoader()
  - afterPropertiesSet
```
public void afterPropertiesSet()
```
    Prepares the MBeanServerConnection if the "connectOnStartup" is turned on (which it is by default).
    
    Specified by:
    
    afterPropertiesSet in interface InitializingBean
  - prepare
```
public void prepare()
```
    Ensures that an MBeanServerConnection is configured and attempts to detect a local connection if one is not supplied.
  - retrieveMBeanInfo
```
private void retrieveMBeanInfo()
                        throws MBeanInfoRetrievalException
```
    Loads the management interface info for the configured MBean into the caches. This information is used by the proxy when determining whether an invocation matches a valid operation or attribute on the management interface of the managed resource.
    
    Throws:
    
    MBeanInfoRetrievalException
  - isPrepared
```
protected boolean isPrepared()
```
    Return whether this client interceptor has already been prepared, i.e. has already looked up the server and cached all metadata.
  - invoke
```
public java.lang.Object invoke(MethodInvocation invocation)
                        throws java.lang.Throwable
```
    Route the invocation to the configured managed resource..
    
    Parameters:
    
    invocation - the MethodInvocation to re-route
    
    Returns:
    
    the value returned as a result of the re-routed invocation
    
    Throws:
    
    java.lang.Throwable - an invocation error propagated to the user
    
    See Also:
    
    doInvoke(MethodInvocation), handleConnectFailure(MethodInvocation, java.lang.Exception)
  - handleConnectFailure
```
protected java.lang.Object handleConnectFailure(MethodInvocation invocation,
                                                java.lang.Exception ex)
                                         throws java.lang.Throwable
```
    Refresh the connection and retry the MBean invocation if possible.
    If not configured to refresh on connect failure, this method simply rethrows the original exception.
    
    Parameters:
    
    invocation - the invocation that failed
    
    ex - the exception raised on remote invocation
    
    Returns:
    
    the result value of the new invocation, if succeeded
    
    Throws:
    
    java.lang.Throwable - an exception raised by the new invocation, if it failed as well
    
    See Also:
    
    setRefreshOnConnectFailure(boolean), doInvoke(MethodInvocation)
  - doInvoke
```
protected java.lang.Object doInvoke(MethodInvocation invocation)
                             throws java.lang.Throwable
```
    Route the invocation to the configured managed resource. Correctly routes JavaBean property access to MBeanServerConnection.get/setAttribute and method invocation to MBeanServerConnection.invoke.
    
    Parameters:
    
    invocation - the MethodInvocation to re-route
    
    Returns:
    
    the value returned as a result of the re-routed invocation
    
    Throws:
    
    java.lang.Throwable - an invocation error propagated to the user
  - invokeAttribute
```
private java.lang.Object invokeAttribute(java.beans.PropertyDescriptor pd,
                                         MethodInvocation invocation)
                                  throws javax.management.JMException,
                                         java.io.IOException
```
    Throws:
    
    javax.management.JMException
    
    java.io.IOException
  - invokeOperation
```
private java.lang.Object invokeOperation(java.lang.reflect.Method method,
                                         java.lang.Object[] args)
                                  throws javax.management.JMException,
                                         java.io.IOException
```
    Routes a method invocation (not a property get/set) to the corresponding operation on the managed resource.
    
    Parameters:
    
    method - the method corresponding to operation on the managed resource.
    
    args - the invocation arguments
    
    Returns:
    
    the value returned by the method invocation.
    
    Throws:
    
    javax.management.JMException
    
    java.io.IOException
  - convertResultValueIfNecessary
```
protected java.lang.Object convertResultValueIfNecessary(java.lang.Object result,
                                                         MethodParameter parameter)
```
    Convert the given result object (from attribute access or operation invocation) to the specified target class for returning from the proxy method.
    
    Parameters:
    
    result - the result object as returned by the MBeanServer
    
    parameter - the method parameter of the proxy method that's been invoked
    
    Returns:
    
    the converted result object, or the passed-in object if no conversion is necessary
  - convertDataArrayToTargetArray
```
private java.lang.Object convertDataArrayToTargetArray(java.lang.Object[] array,
                                                       java.lang.Class<?> targetClass)
                                                throws java.lang.NoSuchMethodException
```
    Throws:
    
    java.lang.NoSuchMethodException
  - convertDataArrayToTargetCollection
```
private java.util.Collection<?> convertDataArrayToTargetCollection(java.lang.Object[] array,
                                                                   java.lang.Class<?> collectionType,
                                                                   java.lang.Class<?> elementType)
                                                            throws java.lang.NoSuchMethodException
```
    Throws:
    
    java.lang.NoSuchMethodException
  - destroy
```
public void destroy()
```
    Description copied from interface: DisposableBean
    
    Invoked by a BeanFactory on destruction of a singleton.
    
    Specified by:
    
    destroy in interface DisposableBean

Class MBeanClientInterceptor

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

logger

server

serviceUrl

environment

agentId

connectOnStartup

refreshOnConnectFailure

objectName

useStrictCasing

managementInterface

beanClassLoader

connector

serverToUse

invocationHandler

allowedAttributes

allowedOperations

signatureCache

preparationMonitor

Constructor Detail

MBeanClientInterceptor

Method Detail

setServer

setServiceUrl

setEnvironment

getEnvironment

setAgentId

setConnectOnStartup

setRefreshOnConnectFailure

setObjectName

setUseStrictCasing

setManagementInterface

getManagementInterface

setBeanClassLoader

afterPropertiesSet

prepare

retrieveMBeanInfo

isPrepared

invoke

handleConnectFailure

doInvoke

invokeAttribute

invokeOperation

convertResultValueIfNecessary

convertDataArrayToTargetArray

convertDataArrayToTargetCollection

destroy