defaultservercontextbuilder.java

来自「反向的AJAX。最大的特性是我们成为反向的Ajax。DWR1.x允许你用java」· Java 代码 · 共 66 行

/*
 * Copyright 2005 Joe Walker
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.directwebremoting.impl;

import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;

import org.directwebremoting.Container;
import org.directwebremoting.ServerContext;
import org.directwebremoting.ServerContextFactory.ServerContextBuilder;
import org.directwebremoting.util.Logger;

/**
 * A ServerContextBuilder that creates DefaultServerContexts.
 * @author Joe Walker [joe at getahead dot ltd dot uk]
 */
public class DefaultServerContextBuilder implements ServerContextBuilder
{
    /* (non-Javadoc)
     * @see ServerContextBuilder#set(javax.servlet.ServletConfig, javax.servlet.ServletContext, org.directwebremoting.Container)
     */
    public void set(ServletConfig config, ServletContext context, Container container)
    {
        try
        {
            ServerContext ec = new DefaultServerContext(config, context, container);
            context.setAttribute(ATTRIBUTE_SERVER_CONTEXT, ec);
        }
        catch (Exception ex)
        {
            log.fatal("Failed to create an ExecutionContext", ex);
        }
    }

    /* (non-Javadoc)
     * @see org.directwebremoting.ServerContextBuilder#get()
     */
    public ServerContext get(ServletContext context)
    {
        return (ServerContext) context.getAttribute(ATTRIBUTE_SERVER_CONTEXT);
    }

    /**
     * The attribute under which we publish the ServerContext
     */
    private static final String ATTRIBUTE_SERVER_CONTEXT = "org.directwebremoting.impl.ServerContext";

    /**
     * The log stream
     */
    private static final Logger log = Logger.getLogger(DefaultServerContextBuilder.class);
}