org.directwebremoting.server.servlet3.Servlet30ContainerAbstraction Maven / Gradle / Ivy

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DWR is easy Ajax for Java. It makes it simple to call Java code directly from Javascript. It gets rid of almost all the boilerplate code between the web browser and your Java code. This version 4.0.2 works with Jakarta Servlet 4.0.2.

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package org.directwebremoting.server.servlet3;

import java.io.IOException;

import jakarta.servlet.ServletConfig;
import jakarta.servlet.ServletContext;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;

import org.directwebremoting.extend.ContainerAbstraction;
import org.directwebremoting.extend.RealScriptSession;
import org.directwebremoting.extend.ScriptConduit;
import org.directwebremoting.extend.ServerLoadMonitor;
import org.directwebremoting.extend.Sleeper;
import org.directwebremoting.impl.DefaultServerLoadMonitor;
import org.directwebremoting.impl.ThreadWaitSleeper;

/**
 * An abstraction of the servlet container that just follows the standards
 * @author Joe Walker [joe at getahead dot ltd dot uk]
 */
public class Servlet30ContainerAbstraction implements ContainerAbstraction
{
    /* (non-Javadoc)
     * @see org.directwebremoting.dwrp.ContainerAbstraction#isNativeEnvironment(jakarta.servlet.ServletConfig)
     */
    public boolean isNativeEnvironment(ServletConfig servletConfig)
    {
        ServletContext ctx = servletConfig.getServletContext();
        return ctx.getMajorVersion() >= 3 && ctx.getEffectiveMajorVersion() >= 3;
    }

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

    /* (non-Javadoc)
     * @see org.directwebremoting.extend.ContainerAbstraction#isResponseCompleted(jakarta.servlet.http.HttpServletRequest)
     */
    public boolean handleResumedRequest(HttpServletRequest request)
    {
        return false;
    }

    /* (non-Javadoc)
     * @see org.directwebremoting.extend.ContainerAbstraction#createSleeper(jakarta.servlet.http.HttpServletRequest, jakarta.servlet.http.HttpServletResponse, org.directwebremoting.extend.RealScriptSession, org.directwebremoting.extend.ScriptConduit)
     */
    public Sleeper createSleeper(HttpServletRequest request, HttpServletResponse response, RealScriptSession scriptSession, ScriptConduit conduit) throws IOException
    {
        if (request.isAsyncSupported()) {
            return new Servlet30Sleeper(request, response, scriptSession, conduit);
        } else {
            return new ThreadWaitSleeper(response, scriptSession, conduit);
        }
    }
}