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 }