Java EE 8 Design Patterns and Best Practices

Implementing the client API

Now, in order to send an asynchronous request using the reactive programming, we create an example of the JAX-RS client API. In the following code, we can see an example of the client API:

public class ClientAPI{    private static final String URL = "http://localhost:8080/asyncRestService/resources/upload";    private static final String FILE_PATH = "test.pdf";    public static void main( String[] args ) {        Client client = ClientBuilder.newClient();        WebTarget target = client.target(URL);        try {            CompletionStage<String> csf = target.request()                    .rx()                    .post(Entity.entity(new FileInputStream(new                     File(FILE_PATH)),"application/pdf"),String.class);            csf.whenCompleteAsync((path, err)->{                if( Objects.isNull( err ) )                    System.out.println( ...