JAX-RS - Standard Client API

JAX-RS 2.0 introduced a standard JAX-RS client API. Now we don't have to use a third part API anymore. The API is based on SPI pattern so actual work is done by underlying implementation but our code is only dependent on JAX-RS API. In these tutorials, we will be using Jersey implementation.

Here's a quick code to have an idea how JAX-RS client API works

Client client = ClientBuilder.newClient();
WebTarget target = client.target("http://www.example.com/service/orders");
Response response = target.request().get();
System.out.println(response.getEntity());
response.close();
client.close();

Note, in previous examples, we have been using the same client API in our junit tests. In JUnit tests the Client is created in super class JerseyTest

Example Project

mvn tomcat7:run

After running server, we can run the JAX-RS client in separate JVM, by running main method of OrderServiceClient

Dependencies and Technologies Used:

• jersey-core-server 2.22.1: Jersey core server implementation.
• jersey-container-servlet 2.22.1: Jersey core Servlet 3.x implementation.
• jersey-test-framework-provider-jdk-http 2.22.1: Jersey Test Framework - JDK HTTP container.
• JDK 1.8
• Maven 3.0.4