Register Olingo servlet without web.xml

Is it possible to use the @WebServlet annotation with Olingo? I want to avoid creating the entries in our web.xml:

<servlet>
    <servlet-name>CarServiceServlet</servlet-name>
    <servlet-class>org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet</servlet-class>
    <init-param>
        <param-name>javax.ws.rs.Application</param-name>
        <param-value>org.apache.olingo.odata2.core.rest.app.ODataApplication</param-value>
    </init-param>
    <init-param>
        <param-name>org.apache.olingo.odata2.service.factory</param-name>
        <param-value>com.sample.CarServiceFactory</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>CarServiceServlet</servlet-name>
    <url-pattern>/CarService.svc/*</url-pattern>
</servlet-mapping>

The code is taken from the olingo-sample repository. Perhaps there is a way like @WebInitParams to create the init parameters, but what I have to annotate - the class X extends ODataServiceFactory? Does it work generelly?

EDIT: I am using Olingo V2 and Tomcat 8.

Solution

Sure you can do it with the annotation. You will have to create a class that extends from CXFNonSpringJaxrsServlet and pass the init parameters in @WebServlet annotation.

Following is the code that replicates your web.xml.

package com.sample;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebInitParam;
import javax.servlet.annotation.WebServlet;

import org.apache.cxf.jaxrs.servlet.CXFNonSpringJaxrsServlet;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author Shiva Saxena
 *
 */
@WebServlet(name = "CarServiceServlet", value = "/CarService.svc/*", initParams = {
    @WebInitParam(name = "javax.ws.rs.Application", value = "org.apache.olingo.odata2.core.rest.app.ODataApplication"),
    @WebInitParam(name = "org.apache.olingo.odata2.service.factory", value = "com.sample.CarServiceFactory") })
public class MyServlet extends CXFNonSpringJaxrsServlet {

    Logger logger = LoggerFactory.getLogger(MyServlet.class);

    private static final long serialVersionUID = -5663461069269732798L;

    @Override
    public void service(ServletRequest req, ServletResponse res) throws ServletException, IOException {

        // It is not necessory to override this function.Its here just for logging and better understanding 
        logger.info("Call intercepted by:" + this.getClass().getName());
        super.service(req, res);
    }

}