org.obligate.annotations.contract.proxy
Class IndirectContractProxy

java.lang.Object
  org.obligate.annotations.contract.proxy.ContractProxy
      org.obligate.annotations.contract.proxy.IndirectContractProxy

All Implemented Interfaces:

java.lang.reflect.InvocationHandler, ContractVariables

public class IndirectContractProxy
extends ContractProxy

This class acts as a proxy for EJB calls, this has to do indirection between the external interface and the EJB interface, the reason for this is due to the issue of the slightly odd way that EJB separates the implementation from the generated interfaces. There are several different approaches that are possible including the dynamic generation of the runtime class that performs the indirection. One challenge on Remote EJBs is the addition of RemoteExceptions which must be bundled up and not passed on as such but wrapped in an unchecked exception.

Since:

23-Jan-2006

Author:

Steve Jones

Field Summary

Fields inherited from interface org.obligate.annotations.contract.proxy.ContractVariables

POSTCONDITION_ID, PRECONDITION_ID

Constructor Summary

IndirectContractProxy(java.lang.Object ejbProxy, java.lang.Class serviceInterface)
Create the proxy from the reference to the (either) EJB Remote or EJB Local interface and the external interface being promoted.

Method Summary

protected java.lang.Object

internalInvocation(java.lang.reflect.Method method, java.lang.Object[] arguments) The abstract method that needs to be implemented to perform the actual call

Methods inherited from class org.obligate.annotations.contract.proxy.ContractProxy

doValidation, invoke, toMethodCallString

Methods inherited from class java.lang.Object

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

Constructor Detail

IndirectContractProxy

public IndirectContractProxy(java.lang.Object ejbProxy,
                             java.lang.Class serviceInterface)

Create the proxy from the reference to the (either) EJB Remote or EJB Local interface and the external interface being promoted.

Parameters:

ejbProxy -

serviceInterface -

Method Detail

internalInvocation

protected java.lang.Object internalInvocation(java.lang.reflect.Method method,
                                              java.lang.Object[] arguments)
                                       throws java.lang.Throwable

Description copied from class: ContractProxy

The abstract method that needs to be implemented to perform the actual call

Specified by:

internalInvocation in class ContractProxy

Parameters:

method - the method to call

arguments - the arguments for the call

Returns:

the result of the call

Throws:

java.lang.Throwable

See Also:

ContractProxy.internalInvocation(java.lang.reflect.Method, java.lang.Object[])