grizzlywebcontainerfactory.java

来自「resetful样式的ws样例,一种面向资源的webservices服务」· Java 代码 · 共 144 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.
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 * 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
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 * 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.api.container.grizzly;

import com.sun.grizzly.http.SelectorThread;
import com.sun.grizzly.http.servlet.ServletAdapter;
import com.sun.jersey.api.container.ContainerException;
import com.sun.jersey.api.core.ClasspathResourceConfig;
import com.sun.jersey.spi.container.servlet.ServletContainer;
import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.util.Map;
import javax.servlet.Servlet;

/**
 * Factory for creating and starting Grizzly {@link SelectorThread} instances
 * for deploying a Servlet.
 * 
 * @author [e-mail]
 */
public final class GrizzlyWebContainerFactory {
    
    private GrizzlyWebContainerFactory() {}
    
    public static SelectorThread create(String u) throws IOException {
        if (u == null)
            throw new IllegalArgumentException("The URI must not be null");

        return create(URI.create(u));
    }
    
    public static SelectorThread create(String u, Map<String, String> initParams) throws IOException {
        if (u == null)
            throw new IllegalArgumentException("The URI must not be null");
        
        return create(URI.create(u), initParams);
    }
    
    public static SelectorThread create(URI u) throws IOException {
        return create(u, ServletContainer.class);
    }
        
    public static SelectorThread create(URI u, 
            Map<String, String> initParams) throws IOException {
        return create(u, ServletContainer.class, initParams);
    }
    
    public static SelectorThread create(String u, Class<? extends Servlet> c) throws IOException {
        if (u == null)
            throw new IllegalArgumentException("The URI must not be null");

        return create(URI.create(u), c);
    }
    
    public static SelectorThread create(String u, Class<? extends Servlet> c,
            Map<String, String> initParams) throws IOException {
        if (u == null)
            throw new IllegalArgumentException("The URI must not be null");

        return create(URI.create(u), c, initParams);
    }
    
    public static SelectorThread create(URI u, Class<? extends Servlet> c) throws IOException {
        return create(u, c, null);
    }
    
    public static SelectorThread create(URI u, Class<? extends Servlet> c, 
            Map<String, String> initParams) throws IOException {
        
        ServletAdapter adapter = new ServletAdapter();
        if (initParams == null) {
            adapter.addInitParameter(ClasspathResourceConfig.PROPERTY_CLASSPATH, 
                     System.getProperty("java.class.path").replace(File.pathSeparatorChar, ';'));
        } else {
            for (Map.Entry<String, String> e : initParams.entrySet()) {
                adapter.addInitParameter(e.getKey(), e.getValue());
            }
        }
        
        adapter.setServletInstance(getInstance(c));
        
        String path = u.getPath();
        if (path == null)
            throw new IllegalArgumentException("The URI path, of the URI " + u + 
                    ", must be non-null");
        else if (path.length() == 0)
            throw new IllegalArgumentException("The URI path, of the URI " + u + 
                    ", must be present");
        else if (path.charAt(0) != '/')
            throw new IllegalArgumentException("The URI path, of the URI " + u + 
                    ". must start with a '/'");
        
        if (path.length() > 1) {
            if (path.endsWith("/"))
                path = path.substring(0, path.length() - 1);
            adapter.setContextPath(path);
        }
        
        return GrizzlyServerFactory.create(u, adapter);
    }    
    
     private static Servlet getInstance(Class<? extends Servlet> c){        
         try{                              
             return c.newInstance();
         } catch (Exception e) {
             throw new ContainerException(e);
         }   
     }     
}