PATCH http verb support for CXF RS.

Issue

• We have developed a simple echo restful service that accept a request with the PATCH http verb. In order to accomplish it we created a custom PATCH annotation (because JAX-RS 2.0 specification does not support it).
• Below the annotation definition

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

import javax.ws.rs.HttpMethod;

@Target({ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
@HttpMethod("PATCH")
public @interface PATCH {
}

• This annotation is being used as

This annotation has been used to annotate the service interface:

import javax.ws.rs.Consumes;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;

public interface Exposure {

    @PATCH
    @Consumes(MediaType.APPLICATION_JSON)
    @Produces(MediaType.APPLICATION_JSON)
    @Path("/tenant")
    public EchoResponse echoTenant(EchoRequest request);


}

• However in logs we are getting following WARN message.

12:47:09,295 | WARN  | qtp1417018680-70 | Response                         | 86 - org.eclipse.jetty.aggregate.jetty-all-server - 8.1.19.v20160209 | Committed before 501 Method PATCH is not defined in RFC 2068 and is not supported by the Servlet API 
12:47:09,295 | WARN  | qtp1417018680-70 | ServletHandler                   | 86 - org.eclipse.jetty.aggregate.jetty-all-server - 8.1.19.v20160209 | Error Processing URI: /cxf/multitenancy/tenant/ - (java.lang.IllegalStateException) Committed