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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For further API reference and developer documentation, see Java SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

Copyright 2008 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.


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