RESTful Java Web Services - Second Edition

Asynchronous RESTful web service client

This section describes the usage of the asynchronous JAX-RS API on the client for calling the RESTful web APIs.

To invoke a REST API asynchronously on the client, you use javax.ws.rs.client.AsyncInvoker. The AsyncInvoker instance is obtained from the call of the Invocation.Builder.async() method, as shown in the following code:

//Other imports are omitted for brevity import javax.ws.rs.client.AsyncInvoker; import javax.ws.rs.client.Client; import javax.ws.rs.client.WebTarget; import javax.ws.rs.core.GenericType; import javax.ws.rs.core.Response; String BASE_URI = "http://localhost:8080/hr-services/webresources"; Client client = ClientBuilder.newClient(); WebTarget webTarget = client.target(BASE_URI).path("hr").path("departments"); ...