org.jfox.ejb
Class InvocationHandlerSupport

java.lang.Object
  org.jfox.ejb.InvocationHandlerSupport

All Implemented Interfaces:

ClientInvocationHandler, java.lang.reflect.InvocationHandler, java.io.Serializable

Direct Known Subclasses:

JRMPInvocationHandler, LOCALInvocationHandler

public abstract class InvocationHandlerSupport

extends java.lang.Object

implements ClientInvocationHandler

所有的基于某个协议的 InvocationHandler 的父类

See Also:

Serialized Form

Field Summary

protected ContainerInvoker	invoker
protected ObjectId	objectId

Constructor Summary

InvocationHandlerSupport(ObjectId objectId, ContainerInvoker invoker)

Method Summary

ContainerInvoker	getInvoker()
protected static long	getMethodHash(java.lang.reflect.Method method) 得到一个 method 的 hashCode ，可以唯一的标志一个 method
ObjectId	getObjectId() 得到要访问的远程 EJBHome 或者 EJBObject 的　ObjectId
java.lang.Object	invoke(java.lang.Object proxy, java.lang.reflect.Method method, java.lang.Object[] args) 接收由 DelegateInvocationHandler 转发来的 invoke 请求 可以实现通用的 Object 方法，比如：toString, hashCode 等
protected abstract java.lang.Object	invokeBean(java.lang.Object proxy, java.lang.reflect.Method method, java.lang.Object[] args) 执行 Bean 的方法
protected abstract java.lang.Object	invokeHome(java.lang.Object proxy, java.lang.reflect.Method method, java.lang.Object[] args) 来自 EJBHome 的方法 注意：要注意拦截来自 EJBHome 的请求 比如：create，这时，服务端返回的并不是一个 EJBObject 对象， 而是这个 EJBObject 对象的 ObjectId，所以必须在这里手动生成代理对象
protected void	readObject(java.io.ObjectInputStream in)

Methods inherited from class java.lang.Object

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

Field Detail

objectId

protected ObjectId objectId

invoker

protected ContainerInvoker invoker

Constructor Detail

InvocationHandlerSupport

public InvocationHandlerSupport(ObjectId objectId,
                                ContainerInvoker invoker)

Method Detail

getObjectId

public ObjectId getObjectId()

Description copied from interface: ClientInvocationHandler

得到要访问的远程 EJBHome 或者 EJBObject 的　ObjectId

Specified by:

getObjectId in interface ClientInvocationHandler

Returns:

getInvoker

public ContainerInvoker getInvoker()

invoke

public java.lang.Object invoke(java.lang.Object proxy,
                               java.lang.reflect.Method method,
                               java.lang.Object[] args)
                        throws java.lang.Throwable

接收由 DelegateInvocationHandler 转发来的 invoke 请求 可以实现通用的 Object 方法，比如：toString, hashCode 等

Specified by:

invoke in interface java.lang.reflect.InvocationHandler

Parameters:

proxy - the proxy instance that the method was invoked on

method - the Method instance corresponding to the interface method invoked on the proxy instance. The declaring class of the Method object will be the interface that the method was declared in, which may be a superinterface of the proxy interface that the proxy class inherits the method through.

args - an array of objects containing the values of the arguments passed in the method invocation on the proxy instance, or null if interface method takes no arguments. Arguments of primitive types are wrapped in instances of the appropriate primitive wrapper class, such as java.lang.Integer or java.lang.Boolean.

Returns:

the value to return from the method invocation on the proxy instance. If the declared return type of the interface method is a primitive type, then the value returned by this method must be an instance of the corresponding primitive wrapper class; otherwise, it must be a type assignable to the declared return type. If the value returned by this method is null and the interface method's return type is primitive, then a NullPointerException will be thrown by the method invocation on the proxy instance. If the value returned by this method is otherwise not compatible with the interface method's declared return type as described above, a ClassCastException will be thrown by the method invocation on the proxy instance.

Throws:

java.lang.Throwable - the exception to throw from the method invocation on the proxy instance. The exception's type must be assignable either to any of the exception types declared in the throws clause of the interface method or to the unchecked exception types java.lang.RuntimeException or java.lang.Error. If a checked exception is thrown by this method that is not assignable to any of the exception types declared in the throws clause of the interface method, then an UndeclaredThrowableException containing the exception that was thrown by this method will be thrown by the method invocation on the proxy instance.

See Also:

UndeclaredThrowableException

invokeHome

protected abstract java.lang.Object invokeHome(java.lang.Object proxy,
                                               java.lang.reflect.Method method,
                                               java.lang.Object[] args)
                                        throws java.lang.Exception

来自 EJBHome 的方法 注意：要注意拦截来自 EJBHome 的请求 比如：create，这时，服务端返回的并不是一个 EJBObject 对象， 而是这个 EJBObject 对象的 ObjectId，所以必须在这里手动生成代理对象

Throws:

java.lang.Exception

invokeBean

protected abstract java.lang.Object invokeBean(java.lang.Object proxy,
                                               java.lang.reflect.Method method,
                                               java.lang.Object[] args)
                                        throws java.lang.Exception

执行 Bean 的方法

Throws:

java.lang.Exception

readObject

protected void readObject(java.io.ObjectInputStream in)
                   throws java.io.IOException,
                          java.lang.ClassNotFoundException

Throws:

java.io.IOException

java.lang.ClassNotFoundException

getMethodHash

protected static long getMethodHash(java.lang.reflect.Method method)

得到一个 method 的 hashCode ，可以唯一的标志一个 method

Parameters:

method -

Returns: