Embedded Jetty 9

Question

I dont understand how i can rewrite this code used with jetty 6 for jetty 9 :

import org.mortbay.jetty.*;
import org.mortbay.jetty.nio.SelectChannelConnector;
import org.mortbay.jetty.webapp.WebAppContext;

public class ApplLauncher {
    public static void main(String[] args) {
        Server server = new Server();

        Connector connector = new SelectChannelConnector();
        connector.setPort(8080);
        server.addConnector(connector);

        WebAppContext root = new WebAppContext("C:\\Users\\OZKA\\IdeaProjects\\projectname\\projectname\\web", "/");
        root.setWelcomeFiles(new String[]{"index.html"});
        //root.addServlet(new ServletHolder(new TestServlet()), "/test");

        server.setHandlers(new Handler[]{root});

        try {
            server.start();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

}

The code above works fine and response the static content from the web folder and servlets, mapped in web.xml. Here is my attempts to use embeded jetty 9:

import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.webapp.WebAppContext;
import org.eclipse.jetty.server.handler.ResourceHandler;
import org.eclipse.jetty.server.handler.HandlerList;
import org.eclipse.jetty.server.Handler;


public class ApplLauncher {
    public static void main(String[] args) {
        System.out.println("Hello from ScalaSbt Web Project");
        Server server = new Server(8080);
        WebAppContext webapp = new WebAppContext("D:\\Dev\\Scala\\ScalaTestProject\\web\\", "/");
        ResourceHandler resource_handler = new ResourceHandler();
        resource_handler.setWelcomeFiles(new String[]{ "index.html" });
        HandlerList handlers = new HandlerList();
        handlers.setHandlers(new Handler[] { resource_handler, webapp});
        server.setHandler(handlers);
        try {
            server.start();
            server.join();
        }
        catch(Exception ex) {
            ex.printStackTrace();
        }
    }

}

The server is starting, but index.html request throws error:

"java.lang.NoSuchMethodError: javax.servlet.http.HttpServletRequest.isAsyncStarted()Z"

I tried to find a working example in Google, but found nothing useful. Official samples and documentation is very confusing and I do not understand how i can use embeded jetty version 9.

How are you building and running this app? From your code it looks like you might be using SBT? In which case, could you show us your build.sbt file? — andersschuller, Feb 02 '14 at 11:47
I just run AppLauncher in the Idea IDE, SBT using for manage dependencies only. — , Feb 02 '14 at 11:53

score 8 · Accepted Answer · answered Feb 02 '14 at 12:36

8

Error message clearly indicates that you have wrong version of Servlet API in your classpath.

Check your dependencies, you probably have pre-3.0 Servlet API somewhere, it should be removed.

answered Feb 02 '14 at 12:36

axtavt

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thanks a lot, i deleted in ProjectSettings/Modules/Dependencies javax-servlet api 2.4 and the server displays my index page. – Feb 02 '14 at 13:02

score 1 · Answer 2 · answered Feb 16 '16 at 21:21

If you are using Gradle the execute

gradle dependencies

analyze the dependency tree and exclude the 'servlet-api' dependencies with version less than 3.0. You can do the following to exclude

compile ('javax.servlet:jsp-api:2.0'){
    exclude module : 'servlet-api'
}

There can be multiple dependencies which further include servlet-api-2.x. Exclude all those

score 0 · Answer 3 · answered Sep 22 '15 at 11:54

Adding on what @axtavt said: if you are using maven add the following depedency:

 <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>servlet-api</artifactId>
        <version>3.0-alpha-1</version>
        <scope>provided</scope>
 </dependency>

Also do a mvn dependency:tree |grep servlet and double-check that you do not have servlet-api:2.x imported.

Embedded Jetty 9

3 Answers3