resourcemethoddispatcherfactory.java

来自「resetful样式的ws样例,一种面向资源的webservices服务」· Java 代码 · 共 94 行

/*
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
 * 
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://jersey.dev.java.net/CDDL+GPL.html
 * or jersey/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 * 
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at jersey/legal/LICENSE.txt.
 * Sun designates this particular file as subject to the "Classpath" exception
 * as provided by Sun in the GPL Version 2 section of the License file that
 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
 * identifying information: "Portions Copyrighted [year]
 * [name of copyright owner]"
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 * 
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package com.sun.jersey.impl.application;

import com.sun.jersey.api.model.AbstractResourceMethod;
import com.sun.jersey.impl.ImplMessages;
import com.sun.jersey.impl.model.method.dispatch.ResourceMethodDispatchProvider;
import com.sun.jersey.spi.dispatch.RequestDispatcher;
import com.sun.jersey.spi.service.ServiceFinder;
import com.sun.jersey.spi.template.TemplateProcessor;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.LinkedList;
import java.util.Set;
import java.util.logging.Logger;

/**
 *
 * @author [e-mail]
 */
public final class ResourceMethodDispatcherFactory {
    private static final Logger LOGGER = Logger.getLogger(ResourceMethodDispatcherFactory.class.getName());
    
    private final Set<ResourceMethodDispatchProvider> dispatchers;
    
    public ResourceMethodDispatcherFactory(ComponentProviderCache componentProviderCache) {
        dispatchers = componentProviderCache.getProvidersAndServices(
                ResourceMethodDispatchProvider.class);
    }

    // TemplateContext
    
    public Set<ResourceMethodDispatchProvider> getDispatchers() {
        return dispatchers;
    }
    
    public RequestDispatcher getDispatcher(AbstractResourceMethod abstractResourceMethod) {
        for (ResourceMethodDispatchProvider rmdp : dispatchers) {
            try {
                RequestDispatcher d = rmdp.create(abstractResourceMethod);
                if (d != null)
                    return d;
            } catch (Exception e) {
                StringWriter sw = new StringWriter();
                
                sw.write(ImplMessages.ERROR_PROCESSING_METHOD(
                        abstractResourceMethod.getMethod(), 
                        rmdp.getClass().getName()));
                PrintWriter pw = new PrintWriter(sw);
                e.printStackTrace(pw);
                pw.flush();
                
                LOGGER.severe(sw.toString());
            }
        }
        
        return null;        
    }
}