1 /* 2 * Copyright (c) 1997, 2012, 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 com.sun.istack.internal.NotNull; 29 30 /** 31 * This class determines an instance of {@link Container} for the runtime. 32 * It applies for both server and client runtimes(for e.g in Servlet could 33 * be accessing a Web Service). 34 * 35 * A client that is invoking a web service may be running in a 36 * container(for e.g servlet). T 37 * 38 * <p> 39 * ContainerResolver uses a static field to keep the instance of the resolver object. 40 * Typically appserver may set its custom container resolver using the static method 41 * {@link #setInstance(ContainerResolver)} 42 * 43 * @author Jitendra Kotamraju 44 */ 45 public abstract class ContainerResolver { 46 47 private static final ThreadLocalContainerResolver DEFAULT = new ThreadLocalContainerResolver(); 48 49 private static volatile ContainerResolver theResolver = DEFAULT; 50 51 /** 52 * Sets the custom container resolver which can be used to get client's 53 * {@link Container}. 54 * 55 * @param resolver container resolver 56 */ 57 public static void setInstance(ContainerResolver resolver) { 58 if(resolver==null) 59 resolver = DEFAULT; 60 theResolver = resolver; 61 } 62 63 /** 64 * Returns the container resolver which can be used to get client's {@link Container}. 65 * 66 * @return container resolver instance 67 */ 68 public static @NotNull ContainerResolver getInstance() { 69 return theResolver; 70 } 71 72 /** 73 * Returns the default container resolver which can be used to get {@link Container}. 74 * 75 * @return default container resolver 76 */ 77 public static ThreadLocalContainerResolver getDefault() { 78 return DEFAULT; 79 } 80 81 /** 82 * Returns the {@link Container} context in which client is running. 83 * 84 * @return container instance for the client 85 */ 86 public abstract @NotNull Container getContainer(); 87 88 }