1 /* 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package com.sun.xml.internal.ws.api.server; 27 28 import java.util.concurrent.Executor; 29 30 /** 31 * ContainerResolver based on {@link ThreadLocal}. 32 * <p> 33 * The ThreadLocalContainerResolver is the default implementation available 34 * from the ContainerResolver using {@link ContainerResolver#getDefault()}. Code 35 * sections that run with a Container must use the following pattern: 36 * <pre> 37 * public void m() { 38 * Container old = ContainerResolver.getDefault().enterContainer(myContainer); 39 * try { 40 * // ... method body 41 * } finally { 42 * ContainerResolver.getDefault().exitContainer(old); 43 * } 44 * } 45 * </pre> 46 * @since 2.2.7 47 */ 48 public class ThreadLocalContainerResolver extends ContainerResolver { 49 private ThreadLocal<Container> containerThreadLocal = new ThreadLocal<Container>() { 50 @Override 51 protected Container initialValue() { 52 return Container.NONE; 53 } 54 }; 55 56 public Container getContainer() { 57 return containerThreadLocal.get(); 58 } 59 60 /** 61 * Enters container 62 * @param container Container to set 63 * @return Previous container; must be remembered and passed to exitContainer 64 */ 65 public Container enterContainer(Container container) { 66 Container old = containerThreadLocal.get(); 67 containerThreadLocal.set(container); 68 return old; 69 } 70 71 /** 72 * Exits container 73 * @param old Container returned from enterContainer 74 */ 75 public void exitContainer(Container old) { 76 containerThreadLocal.set(old); 77 } 78 79 /** 80 * Used by {@link com.sun.xml.internal.ws.api.pipe.Engine} to wrap asynchronous {@link com.sun.xml.internal.ws.api.pipe.Fiber} executions 81 * @param container Container 82 * @param ex Executor to wrap 83 * @return an Executor that will set the container during executions of Runnables 84 */ 85 public Executor wrapExecutor(final Container container, final Executor ex) { 86 if (ex == null) 87 return null; 88 89 return new Executor() { 90 @Override 91 public void execute(final Runnable command) { 92 ex.execute(new Runnable() { 93 @Override 94 public void run() { 95 Container old = enterContainer(container); 96 try { 97 command.run(); 98 } finally { 99 exitContainer(old); 100 } 101 } 102 }); 103 } 104 }; 105 } 106 }