未调用ContainerRequestFilter方法

Question

I've just started learning how to code REST web services, and I've been stuck with this for several days now. I'm coding an example application with header-based filtering, using Jersey 2 and deployed on Tomee-plus 1.7.2. No matter what I try, the ContainerRequestFilter's filter method is never called.

// TestRequestFilter.java
import javax.ws.rs.container.ContainerRequestContext;
import javax.ws.rs.container.ContainerRequestFilter;
import javax.ws.rs.container.PreMatching;
import javax.ws.rs.ext.Provider;

@Provider
@PreMatching
public class TestRequestFilter implements ContainerRequestFilter
{
    private final static Logger log = Logger.getLogger(DemoRESTRequestFilter.class.getName());

    @Override
    public void filter(ContainerRequestContext requestCtx) throws IOException
    {
        System.out.println("FILTER-REQUEST");
    }
}

My web.xml file is empty save for the required headers. The behavior right now is: the filter is recognised as @Provider and instantiated as normal, the test web service I have (just a GET returning an empty Response) can be called normally, but the filter method is never called.

Things I've tried and their effects:

• Declare the filter in a class extending Application: Error on deployment.
• Register the filter in a class extending ResourceConfig: Filter is instantiated twice, but filter method is still not called.
• Use the classes from the com.sun.jersey.spi.container package: No effect.
• Add an authentication annotation (@RolesAllowed, @PermitAll,...) to the WS method: No effect.
• Add disabled=true to cfx-rs.properties in server configuration: Deployed service cannot be found at usual URL.
• Add this to web.xml : No effect.

 <servlet> <servlet-name>CongressAppWS</servlet-name> <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class> <init-param> <param-name>org.glassfish.jersey.spi.container.ContainerRequestFilters</param-name> <param-value>com.s4w.congressapp.auth.DemoRESTRequestFilter;com.s4w.congressapp.auth.DemoRESTResponseFilter</param-value> </init-param> <init-param> <param-name>jersey.config.server.provider.packages</param-name> <param-value>com.s4w.congressapp.auth;com.s4w.congressapp.resources</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> 

• Using com.sun.jersey.spi.container prefix instead of org.glassfish.jersey.spi.container in previous code: No effect.

I'm honestly running out of options here. Every time I try something new, either there is no effect or everything stops working. Any help?

Answer 1

I found an alternative to ContainerRequestFilter that actually works! It's javax.servlet.Filter . Extending from this class, all I had to do was annotate it with the following code and the filtering mechanism works like a charm.

@WebFilter(filterName = "AuthenticationFilter", urlPatterns = { "/*" })

Answer 2

The reason for this is that ContainerRequestFilter is part JAX-RS 2.0, but TomEE 1.7.X comes with JAX-RS 1.1. You'll either have to upgrade TomEE to 7.0.0+ or use a different Server (eg Glassfish).