org.directwebremoting.impl.JettyContainerAbstraction Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of dwr Show documentation

DWR is easy Ajax for Java. It makes it simple to call Java code directly from Javascript. It gets rid of almost all the boiler plate code between the web browser and your Java code.

There is a newer version: 3.0.2-RELEASE

Show newest version

/*
 * 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.http.HttpServletRequest;

import org.directwebremoting.extend.ContainerAbstraction;
import org.directwebremoting.extend.ServerLoadMonitor;
import org.directwebremoting.extend.Sleeper;

/**
 * An abstraction of the servlet container that is specific to Jetty
 * @author Joe Walker [joe at getahead dot ltd dot uk]
 */
public class JettyContainerAbstraction implements ContainerAbstraction
{
    /* (non-Javadoc)
     * @see org.directwebremoting.dwrp.ContainerAbstraction#isNativeEnvironment(javax.servlet.ServletConfig)
     */
    public boolean isNativeEnvironment(ServletConfig servletConfig)
    {
        String serverInfo = servletConfig.getServletContext().getServerInfo();
        if (serverInfo.startsWith("jetty-"))
        {
            try
            {
                int version = Integer.parseInt(serverInfo.substring(6, 7));
                if (version >= 6)
                {
                    return true;
                }
            }
            catch (NumberFormatException ex)
            {
                // ignore
            }
        }

        return false;
    }

    /* (non-Javadoc)
     * @see org.directwebremoting.dwrp.ContainerAbstraction#createSleeper(javax.servlet.http.HttpServletRequest)
     */
    public Sleeper createSleeper(HttpServletRequest request)
    {
        return new JettyContinuationSleeper(request);
    }

    /* (non-Javadoc)
     * @see org.directwebremoting.dwrp.ContainerAbstraction#getServerLoadMonitorImplementation()
     */
    public Class getServerLoadMonitorImplementation()
    {
        return ThreadDroppingServerLoadMonitor.class;
    }
}