001: /*
002: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003: *
004: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005: *
006: * The contents of this file are subject to the terms of either the GNU
007: * General Public License Version 2 only ("GPL") or the Common Development
008: * and Distribution License("CDDL") (collectively, the "License"). You
009: * may not use this file except in compliance with the License. You can obtain
010: * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
011: * or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
012: * language governing permissions and limitations under the License.
013: *
014: * When distributing the software, include this License Header Notice in each
015: * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
016: * Sun designates this particular file as subject to the "Classpath" exception
017: * as provided by Sun in the GPL Version 2 section of the License file that
018: * accompanied this code. If applicable, add the following below the License
019: * Header, with the fields enclosed by brackets [] replaced by your own
020: * identifying information: "Portions Copyrighted [year]
021: * [name of copyright owner]"
022: *
023: * Contributor(s):
024: *
025: * If you wish your version of this file to be governed by only the CDDL or
026: * only the GPL Version 2, indicate your decision by adding "[Contributor]
027: * elects to include this software in this distribution under the [CDDL or GPL
028: * Version 2] license." If you don't indicate a single choice of license, a
029: * recipient has the option to distribute your version of this file under
030: * either the CDDL, the GPL Version 2 or to extend the choice of license to
031: * its licensees as provided above. However, if you add GPL Version 2 code
032: * and therefore, elected the GPL Version 2 license, then the option applies
033: * only if the new code is made subject to such option by the copyright
034: * holder.
035: */
036:
037: package com.sun.xml.ws.api.server;
038:
039: import com.sun.istack.NotNull;
040:
041: /**
042: * This class determines an instance of {@link Container} for the runtime.
043: * It applies for both server and client runtimes(for e.g in Servlet could
044: * be accessing a Web Service). Always call {@link #setInstance} when the
045: * application's environment is initailized and a Container instance should
046: * be associated with an application.
047: *
048: * A client that is invoking a web service may be running in a
049: * container(for e.g servlet). T
050: *
051: * <p>
052: * ContainerResolver uses a static field to keep the instance of the resolver object.
053: * Typically appserver may set its custom container resolver using the static method
054: * {@link #setInstance(ContainerResolver)}
055: *
056: * @author Jitendra Kotamraju
057: */
058: public abstract class ContainerResolver {
059:
060: private static final ContainerResolver NONE = new ContainerResolver() {
061: public Container getContainer() {
062: return Container.NONE;
063: }
064: };
065:
066: private static volatile ContainerResolver theResolver = NONE;
067:
068: /**
069: * Sets the custom container resolver which can be used to get client's
070: * {@link Container}.
071: *
072: * @param resolver container resolver
073: */
074: public static void setInstance(ContainerResolver resolver) {
075: if (resolver == null)
076: resolver = NONE;
077: theResolver = resolver;
078: }
079:
080: /**
081: * Returns the container resolver which can be used to get client's {@link Container}.
082: *
083: * @return container resolver instance
084: */
085: public static @NotNull
086: ContainerResolver getInstance() {
087: return theResolver;
088: }
089:
090: /**
091: * Returns the default container resolver which can be used to get {@link Container}.
092: *
093: * @return default container resolver
094: */
095: public static ContainerResolver getDefault() {
096: return NONE;
097: }
098:
099: /**
100: * Returns the {@link Container} context in which client is running.
101: *
102: * @return container instance for the client
103: */
104: public abstract @NotNull
105: Container getContainer();
106:
107: }
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