Adding multiple servlets into one web.xml

Question

I want to incorporate/add a Jersey project B (already working well) into a new Jersey project A, that would act as a filter/security layer. So as a basic step, I added dependency to Project B on the build path of Project A and also added the same to the Deployment Assembly in the build path. I understood from this post, that I could do so by having the servlets in the same web.xml and mapping them differently using <servlet-mapping> . I did not have any luck when I was trying to access the resource of Project B.

web.xml

<servlet>
    <servlet-name>Jersey Web Application</servlet-name>
    <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
    <init-param>
        <param-name>jersey.config.server.provider.packages</param-name>
        <param-value>org.abc.def.ba, org.pqr.xyz</param-value>
    </init-param>
    <init-param>
        <param-name>javax.ws.rs.Application</param-name>
        <param-value>org.abc.def.ba.CustomApplication</param-value>
    </init-param> 
    <load-on-startup>1</load-on-startup>
</servlet>

 <servlet-mapping>
    <servlet-name>Jersey Web Application</servlet-name>
    <url-pattern>/webapi/*</url-pattern>
</servlet-mapping>

<!-- The Servlet of Project B -->
<servlet>
    <servlet-name>Jersey Web Application 2</servlet-name>
    <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-     class>

<init-param>
        <param-name>javax.ws.rs.Application</param-name>
        <param-value> org.pqr.xyz.MyApplication</param-value>
    </init-param> 

    <!-- Register resources and providers under my.package. -->
   <init-param>
        <param-name>jersey.config.server.provider.packages</param-name>
        <param-value> org.pqr.xyz</param-value>
    </init-param>

    <!-- Register my custom provider (not needed if it's in my.package) AND LoggingFilter. -->
    <init-param>
        <param-name>jersey.config.server.provider.classnames</param-name>
        <param-value> org.pqr.xyz.mapper.ObjectMapperProvider</param-value>
    </init-param>

     <init-param>
        <param-name>com.sun.jersey.api.json.POJOMappingFeature</param-name>
        <param-value>true</param-value>
    </init-param>
    <init-param>
        <param-name>com.sun.jersey.config.property.packages</param-name>
        <param-value> org.pqr.xyzr</param-value>
    </init-param>
    <init-param>
        <param-name>com.sun.jersey.spi.container.ResourceFilters</param-name>
        <param-value>com.porterhead.rest.filter.ResourceFilterFactory</param-value>
    </init-param>
    <init-param>
        <param-name>readOnly</param-name>
        <param-value>false</param-value>
    </init-param>
    <load-on-startup>2</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>Jersey Web Application 2</servlet-name>
    <url-pattern>/rest/*</url-pattern>
</servlet-mapping>

So, when I try to access http://localhost:8080/ba/webapi/myresource, it works well. But when I try http://localhost:8080/ba/rest/newresource, I get a 404 error. I know I'm missing out something. I appreciate your guidance on this.

Answer 1

If you are using servlet 3.0, then you can use @ApplicationPath annotation to use different application paths for different resources. In case you do not want to use the annotation, you can achieve the same using web.xml as below

<web-app>
<servlet>
    <servlet-name>org.foo.rest.MyApplication</servlet-name>
</servlet>
...
<servlet-mapping>
    <servlet-name>org.foo.rest.MyApplication</servlet-name>
    <url-pattern>/resources</url-pattern>
</servlet-mapping>
...

For details please refer Jersey documentation for deployment options.