CODEWITHSUNDEEP
google-app-engine
wangyif2
wangyif2

Reputation: 2863

Servlet mapping with annotation does not get resolved by Google App Engine Dev Server

Instead of servlet mapping in the web.xml, i'm trying to use annotation to map the servlet to urls as follows:

import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebServlet(name = "GuestbookServlet", urlPatterns = "/guestbook")
public class GuestbookServlet extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp)
            throws IOException {
        resp.setContentType("text/plain");
        resp.getWriter().println("Hello, world");
    }
}

And I have also declared the 3.0 spec for servlet in web.xml:

<?xml version="1.0" encoding="UTF-8"?>
<web-app
    xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
    version="3.0"
    metadata-complete="false">

</web-app>

However, when I run it on my local environment the response returned is 404.

It works however if I just map the servlets in the web.xml. What am I doing wrong? Does GAE still not support 3.0 specs?

Upvotes: 0

Views: 2074

Answers (3)

Julien
Julien

Reputation: 3873

Servlet 3.1 are now supported on AppEngine.

... In addition to support for an updated JDK and Jetty 9 with Servlet 3.1 specs...

Announcement: https://cloudplatform.googleblog.com/2017/06/Google-App-Engine-standard-now-supports-Java-8.html

Here is a code example

Upvotes: 0

Nick
Nick

Reputation: 1822

Servlet 3.0 spec is not supported by GAE/J

It's still on the roadmap: https://developers.google.com/appengine/docs/features#roadmap_features

You can star this issue to help show your support for this feature: https://code.google.com/p/googleappengine/issues/detail?id=3091

This ticket has been opened a lonnnggg time though.

Upvotes: 5

rickz
rickz

Reputation: 4474

When I run the following JSP code,

Server info == <%=application.getServerInfo()%><br/>
Major==<%=application.getMajorVersion()%><br/>
Minor==<%=application.getMinorVersion()%><br/>
JSP version is <%= JspFactory.getDefaultFactory().getEngineInfo().getSpecificationVersion()%><br/>

I see

Server info == Google App Engine/Google App Engine/1.8.1 Major==2 Minor==5 JSP version is 2.1

You could run it for yourself.

Upvotes: 0

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