Over a million developers have joined DZone.

Dynamic Provider Registration in JAX-RS

Wondering if it's possible to register providers dynamically in JEE? The answer is yes, it is possible! Read on to find out how it's done.

· Java Zone

What every Java engineer should know about microservices: Reactive Microservices Architecture.  Brought to you in partnership with Lightbend.

The DynamicFeature class in JAX-RS (2.0) allows you to register providers:

  • Dynamically i.e. without any pre-defined binding strategy (e.g. annotations).
  • Based on criteria i.e. to help decide which provider to bind to which JAX-RS resource(s).

The JAX-RS implementation detects and executes the DynamicFeature implementations at deployment time

Here is an example where we instruct the JAX-RS runtime to dynamically bind the AuthenticationFilter (a JAX-RS post construct filter) to be applied when a PUT is invoked on UserResource (which is a JAX-RS resource class):

public class DynamicFilter implements DynamicFeature {
  public void configure(ResourceInfo resInfo, FeatureContext ctx) {
    if (UserResource.class.equals(resInfo.getResourceClass()) &&
      resInfo.getResourceMethod().getName().contains("PUT")) {


Criteria are provided by ResourceInfo, and they're based on two attributes:

  • The resource class
  • The resource method


Dynamic registration is achieved using FeatureContext, whose register method can be used to bind the provider.


  • @Provider is needed for automatic discovery by the JAX-RS runtime.
  • Applicable for: filters, interceptors and  any Feature
  • In case of filters, the following applicability criteria apply
    • Post matching (@PreMatching filters excluded).
    • Server side filters i.e. ClientRequestFilter and ClientResponseFilter cannot be registered using this method.
  • Once used, it overrides other bindings (static or using @NameBinding).

Microservices for Java, explained. Revitalize your legacy systems (and your career) with Reactive Microservices Architecture, a free O'Reilly book. Brought to you in partnership with Lightbend.

java ee ,java ,jax-rs ,dynamic provider ,registration

Published at DZone with permission of Abhishek Gupta, DZone MVB. See the original article here.

Opinions expressed by DZone contributors are their own.

The best of DZone straight to your inbox.

Please provide a valid email address.

Thanks for subscribing!

Awesome! Check your inbox to verify your email so you can start receiving the latest in tech news and resources.

{{ parent.title || parent.header.title}}

{{ parent.tldr }}

{{ parent.urlSource.name }}