mirror of git://gcc.gnu.org/git/gcc.git
86 lines
3.7 KiB
Java
86 lines
3.7 KiB
Java
/* Current.java --
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Copyright (C) 2005 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package org.omg.PortableInterceptor;
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import org.omg.CORBA.portable.IDLEntity;
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/**
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* <p>
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* The portable interceptor Current (PICurrent) contains multiple slots where an
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* interceptor can rememeber the request - specific values between subsequent
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* calls of the interceptor methods. In multithreaded environment, it is not
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* possible just to store such data in the interceptor object fields.
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* </p>
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* <p>
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* On the client side, it is possible to set the initial slot values by
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* modifying slots on the Current, returend by ORB.resolve_initial_references
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* ("PICurrent"). The returned value is narrowed with the
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* {@link CurrentHelper#narrow}. On the subsequent invocation, made from the
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* same thread, the interceptors will see the initial slot values as they were
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* set using this approach.
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* </p>
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* <p>
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* There are no way to set the initial values for the server side interceptors,
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* the default values (Any with typecode TCKind.tk_null) should be always
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* assumed.
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* </p>
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* <p>
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* Since an Interceptor is running in a thread, it is running with a thread
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* context and there is a PICurrent on that context. If the Interceptor calls
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* ORB.resolve_initial_references ("PICurrent"), it gets the PICurrent within
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* its thread scope. This PICurrent is different than the request scope
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* PICurrent that the Interceptor obtains via calls to the Client- or Server-
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* RequestInfo object.
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* </p>
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* <p>
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* On the client side the PICurrent can be used to detect the recursive
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* invocations, performed by interceptors. If one of the interceptors makes call
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* via the same ORB, this call is then showed to all interceptors, including the
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* interceptor that made it. To avoid infinite recursion, the during each call
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* this interceptor can set some "recursion flag" into one of the slots of the
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* PICurrent. If the flag is set on the entry point, this indicates a recursive
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* call of that request.
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* </p>
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*/
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public interface Current extends CurrentOperations,
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org.omg.CORBA.Current,
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IDLEntity
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{
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}
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