Java™ Platform
Standard Ed. 6

org.omg.CORBA.portable
Interface InvokeHandler

All Known Subinterfaces:
Tie
All Known Implementing Classes:
BindingIteratorPOA, NamingContextExtPOA, NamingContextPOA, ServantActivatorPOA, ServantLocatorPOA

public interface InvokeHandler

This interface provides a dispatching mechanism for an incoming call. It is invoked by the ORB to dispatch a request to a servant.


Method Summary
 OutputStream _invoke(String method, InputStream input, ResponseHandler handler)
          Invoked by the ORB to dispatch a request to the servant.
 

Method Detail

_invoke

OutputStream _invoke(String method,
                     InputStream input,
                     ResponseHandler handler)
                     throws SystemException
Invoked by the ORB to dispatch a request to the servant. ORB passes the method name, an InputStream containing the marshalled arguments, and a ResponseHandler which the servant uses to construct a proper reply. Only CORBA SystemException may be thrown by this method. The method must return an OutputStream created by the ResponseHandler which contains the marshalled reply. A servant must not retain a reference to the ResponseHandler beyond the lifetime of a method invocation. Servant behaviour is defined as follows:

1. Determine correct method, and unmarshal parameters from InputStream.

2. Invoke method implementation.

3. If no user exception, create a normal reply using ResponseHandler.

4. If user exception occurred, create exception reply using ResponseHandler.

5. Marshal reply into OutputStream returned by ResponseHandler.

6. Return OutputStream to ORB.

Parameters:
method - The method name.
input - The InputStream containing the marshalled arguments.
handler - The ResponseHandler which the servant uses to construct a proper reply
Returns:
The OutputStream created by the ResponseHandler which contains the marshalled reply
Throws:
SystemException - is thrown when invocation fails due to a CORBA system exception.

Java™ Platform
Standard Ed. 6

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