001/* Current.java -- 002 Copyright (C) 2005 Free Software Foundation, Inc. 003 004This file is part of GNU Classpath. 005 006GNU Classpath is free software; you can redistribute it and/or modify 007it under the terms of the GNU General Public License as published by 008the Free Software Foundation; either version 2, or (at your option) 009any later version. 010 011GNU Classpath is distributed in the hope that it will be useful, but 012WITHOUT ANY WARRANTY; without even the implied warranty of 013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014General Public License for more details. 015 016You should have received a copy of the GNU General Public License 017along with GNU Classpath; see the file COPYING. If not, write to the 018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 01902110-1301 USA. 020 021Linking this library statically or dynamically with other modules is 022making a combined work based on this library. Thus, the terms and 023conditions of the GNU General Public License cover the whole 024combination. 025 026As a special exception, the copyright holders of this library give you 027permission to link this library with independent modules to produce an 028executable, regardless of the license terms of these independent 029modules, and to copy and distribute the resulting executable under 030terms of your choice, provided that you also meet, for each linked 031independent module, the terms and conditions of the license of that 032module. An independent module is a module which is not derived from 033or based on this library. If you modify this library, you may extend 034this exception to your version of the library, but you are not 035obligated to do so. If you do not wish to do so, delete this 036exception statement from your version. */ 037 038 039package org.omg.PortableInterceptor; 040 041import org.omg.CORBA.portable.IDLEntity; 042 043/** 044 * <p> 045 * The portable interceptor Current (PICurrent) contains multiple slots where an 046 * interceptor can rememeber the request - specific values between subsequent 047 * calls of the interceptor methods. In multithreaded environment, it is not 048 * possible just to store such data in the interceptor object fields. 049 * </p> 050 * <p> 051 * On the client side, it is possible to set the initial slot values by 052 * modifying slots on the Current, returend by ORB.resolve_initial_references 053 * ("PICurrent"). The returned value is narrowed with the 054 * {@link CurrentHelper#narrow}. On the subsequent invocation, made from the 055 * same thread, the interceptors will see the initial slot values as they were 056 * set using this approach. 057 * </p> 058 * <p> 059 * There are no way to set the initial values for the server side interceptors, 060 * the default values (Any with typecode TCKind.tk_null) should be always 061 * assumed. 062 * </p> 063 * <p> 064 * Since an Interceptor is running in a thread, it is running with a thread 065 * context and there is a PICurrent on that context. If the Interceptor calls 066 * ORB.resolve_initial_references ("PICurrent"), it gets the PICurrent within 067 * its thread scope. This PICurrent is different than the request scope 068 * PICurrent that the Interceptor obtains via calls to the Client- or Server- 069 * RequestInfo object. 070 * </p> 071 * <p> 072 * On the client side the PICurrent can be used to detect the recursive 073 * invocations, performed by interceptors. If one of the interceptors makes call 074 * via the same ORB, this call is then showed to all interceptors, including the 075 * interceptor that made it. To avoid infinite recursion, the during each call 076 * this interceptor can set some "recursion flag" into one of the slots of the 077 * PICurrent. If the flag is set on the entry point, this indicates a recursive 078 * call of that request. 079 * </p> 080 */ 081public interface Current extends CurrentOperations, 082 org.omg.CORBA.Current, 083 IDLEntity 084{ 085}