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org.omg.PortableInterceptor

Interface Current

All Superinterfaces:
Current, CurrentOperations, CurrentOperations, IDLEntity, Object, Serializable
Known Implementing Classes:
gnuIcCurrent
public interface Current
extends CurrentOperations, Current, IDLEntity
The portable interceptor Current (PICurrent) contains multiple slots where an interceptor can rememeber the request - specific values between subsequent calls of the interceptor methods. In multithreaded environment, it is not possible just to store such data in the interceptor object fields.

On the client side, it is possible to set the initial slot values by modifying slots on the Current, returend by ORB.resolve_initial_references ("PICurrent"). The returned value is narrowed with the CurrentHelper.narrow(Object). On the subsequent invocation, made from the same thread, the interceptors will see the initial slot values as they were set using this approach.

There are no way to set the initial values for the server side interceptors, the default values (Any with typecode TCKind.tk_null) should be always assumed.

Since an Interceptor is running in a thread, it is running with a thread context and there is a PICurrent on that context. If the Interceptor calls ORB.resolve_initial_references ("PICurrent"), it gets the PICurrent within its thread scope. This PICurrent is different than the request scope PICurrent that the Interceptor obtains via calls to the Client- or Server- RequestInfo object.

On the client side the PICurrent can be used to detect the recursive invocations, performed by interceptors. If one of the interceptors makes call via the same ORB, this call is then showed to all interceptors, including the interceptor that made it. To avoid infinite recursion, the during each call this interceptor can set some "recursion flag" into one of the slots of the PICurrent. If the flag is set on the entry point, this indicates a recursive call of that request.

Methods inherited from interface org.omg.PortableInterceptor.CurrentOperations

get_slot, set_slot

Methods inherited from interface org.omg.CORBA.Object

_create_request, _create_request, _duplicate, _get_domain_managers, _get_interface_def, _get_policy, _hash, _is_a, _is_equivalent, _non_existent, _release, _request, _set_policy_override
Current.java -- Copyright (C) 2005 Free Software Foundation, Inc. This file is part of GNU Classpath. GNU Classpath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Classpath is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Classpath; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version.

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