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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
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tree976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/org/omg/PortableInterceptor/Current.java
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+/* 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. */
+
+
+package org.omg.PortableInterceptor;
+
+import org.omg.CORBA.portable.IDLEntity;
+
+/**
+ * <p>
+ * 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.
+ * </p>
+ * <p>
+ * 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
+ * {@link CurrentHelper#narrow}. On the subsequent invocation, made from the
+ * same thread, the interceptors will see the initial slot values as they were
+ * set using this approach.
+ * </p>
+ * <p>
+ * 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.
+ * </p>
+ * <p>
+ * 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.
+ * </p>
+ * <p>
+ * 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.
+ * </p>
+ */
+public interface Current extends CurrentOperations,
+ org.omg.CORBA.Current,
+ IDLEntity
+{
+}