Jersey Request Filter only on certain URI

Question

I am trying to do some validation on requests coming into my service using the ContainerRequestFilter. Everything is working fine, however there is one problem

Answer 1

@PreMatching does not work together with @NameBinding, because the resource class/method is not yet known in pre-matching phase. I solved this issue by removing @PreMatching from the filter and using binding priority. See ResourceConfig.register(Object component, int bindingPriority).

Filters to be executed before the resource simply get a higher priority.

Answer 2

I assume that You are using Jersey 2.x (implementation for JAX-RS 2.0 API).

You have two ways to achieve Your goal.

1. Use Name bindings:

---

1.1 Create custom annotation annotated with @NameBinding:

@NameBinding
@Target({ElementType.METHOD, ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
public @interface AnnotationForResourceOne {}

1.2. Create filter with Your annotation:

@Provider
@AnnotationForResourceOne
public class ResourceOneFilter implements ContainerRequestFilter {
...
}

1.3. And bind created filter with selected resource method:

@Path("/resources")
public class Resources {
    @GET
    @Path("/resourceOne")
    @AnnotationForResourceOne
    public String getResourceOne() {...}
}

2. Use DynamicFeature:

---

2.1. Create filter:

public class ResourceOneFilter implements ContainerRequestFilter {
...
}

2.2. Implement javax.ws.rs.container.DynamicFeature interface:

@Provider
public class MaxAgeFeature implements DynamicFeature {
    public void configure(ResourceInfo ri, FeatureContext ctx) {
        if(resourceShouldBeFiltered(ri)){
            ResourceOneFilter filter = new ResourceOneFilter();
            ctx.register(filter);
        }
    }
}

In this scenario:

• filter is not annotated with @Provider annotation;
• configure(...) method is invoked for every resource method;
• ctx.register(filter) binds filter with resource method;

Answer 3

When we use @NameBinding we need to remove @PreMatching annotation from the Filter. @PreMatching causes all the requests go through the filter.