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1: /* Current.java -- 2: Copyright (C) 2005 Free Software Foundation, Inc. 3: 4: This file is part of GNU Classpath. 5: 6: GNU Classpath is free software; you can redistribute it and/or modify 7: it under the terms of the GNU General Public License as published by 8: the Free Software Foundation; either version 2, or (at your option) 9: any later version. 10: 11: GNU Classpath is distributed in the hope that it will be useful, but 12: WITHOUT ANY WARRANTY; without even the implied warranty of 13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14: General Public License for more details. 15: 16: You should have received a copy of the GNU General Public License 17: along with GNU Classpath; see the file COPYING. If not, write to the 18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19: 02110-1301 USA. 20: 21: Linking this library statically or dynamically with other modules is 22: making a combined work based on this library. Thus, the terms and 23: conditions of the GNU General Public License cover the whole 24: combination. 25: 26: As a special exception, the copyright holders of this library give you 27: permission to link this library with independent modules to produce an 28: executable, regardless of the license terms of these independent 29: modules, and to copy and distribute the resulting executable under 30: terms of your choice, provided that you also meet, for each linked 31: independent module, the terms and conditions of the license of that 32: module. An independent module is a module which is not derived from 33: or based on this library. If you modify this library, you may extend 34: this exception to your version of the library, but you are not 35: obligated to do so. If you do not wish to do so, delete this 36: exception statement from your version. */ 37: 38: 39: package org.omg.PortableInterceptor; 40: 41: import org.omg.CORBA.portable.IDLEntity; 42: 43: /** 44: * <p> 45: * The portable interceptor Current (PICurrent) contains multiple slots where an 46: * interceptor can rememeber the request - specific values between subsequent 47: * calls of the interceptor methods. In multithreaded environment, it is not 48: * possible just to store such data in the interceptor object fields. 49: * </p> 50: * <p> 51: * On the client side, it is possible to set the initial slot values by 52: * modifying slots on the Current, returend by ORB.resolve_initial_references 53: * ("PICurrent"). The returned value is narrowed with the 54: * {@link CurrentHelper#narrow}. On the subsequent invocation, made from the 55: * same thread, the interceptors will see the initial slot values as they were 56: * set using this approach. 57: * </p> 58: * <p> 59: * There are no way to set the initial values for the server side interceptors, 60: * the default values (Any with typecode TCKind.tk_null) should be always 61: * assumed. 62: * </p> 63: * <p> 64: * Since an Interceptor is running in a thread, it is running with a thread 65: * context and there is a PICurrent on that context. If the Interceptor calls 66: * ORB.resolve_initial_references ("PICurrent"), it gets the PICurrent within 67: * its thread scope. This PICurrent is different than the request scope 68: * PICurrent that the Interceptor obtains via calls to the Client- or Server- 69: * RequestInfo object. 70: * </p> 71: * <p> 72: * On the client side the PICurrent can be used to detect the recursive 73: * invocations, performed by interceptors. If one of the interceptors makes call 74: * via the same ORB, this call is then showed to all interceptors, including the 75: * interceptor that made it. To avoid infinite recursion, the during each call 76: * this interceptor can set some "recursion flag" into one of the slots of the 77: * PICurrent. If the flag is set on the entry point, this indicates a recursive 78: * call of that request. 79: * </p> 80: */ 81: public interface Current extends CurrentOperations, 82: org.omg.CORBA.Current, 83: IDLEntity 84: { 85: }