2.19. MicroProfile REST 客户端

@Path("resource")
public class TestResource {
   @Path("test")
   @GET
   String test() {
      return "test";
   }
 }

Client client = ClientBuilder.newClient();
String response = client.target("http://localhost:8081/test").request().get(String.class);

@Path("resource")
public interface TestResourceIntf {
    @Path("test")
    @GET
    public String test();
}

TestResourceIntf service = RestClientBuilder.newBuilder()
                              .baseUrl(http://localhost:8081/))
                              .build(TestResourceIntf.class);
String s = service.test();

@Path("resource")
public interface TestResourceIntf2 {
   @Path("test/{path}")mes("text/plain")
   @Produces("text/html")
   @POST
   public String test(@PathParam("path") String path, @QueryParam("query") String query, String entity);
}

POST /resource/test/p/?query=q HTTP/1.1
Accept: text/html
Content-Type: text/plain
Content-Length: 1

e

TestResourceIntf service = RestClientBuilder.newBuilder()
                              .baseUrl(http://localhost:8081/))
                              .register(MyClientResponseFilter.class)
                              .register(MyMessageBodyReader.class)
                              .build(TestResourceIntf.class);

@Path("resource")
@RegisterProvider(MyClientResponseFilter.class)
@RegisterProvider(MyMessageBodyReader.class)
public interface TestResourceIntf2 {
   @Path("test/{path}")
   @Consumes("text/plain")
   @Produces("text/html")
   @POST
   public String test(@PathParam("path") String path, @QueryParam("query") String query, String entity);
}

@POST
@Produces(MediaType.TEXT_PLAIN)
@Consumes(MediaType.TEXT_PLAIN)
String contentLang(@HeaderParam(HttpHeaders.CONTENT_LANGUAGE) String contentLanguage, String subject);

@POST
@Produces(MediaType.TEXT_PLAIN)
@Consumes(MediaType.TEXT_PLAIN)
@ClientHeaderParam(name=HttpHeaders.CONTENT_LANGUAGE, value="{getLanguage}")
String contentLang(String subject);

default String getLanguage() {
   return ...;
}

public interface ClientHeadersFactory {

/**
 * Updates the HTTP headers to send to the remote service. Note that providers
 * on the outbound processing chain could further update the headers.
 *
 * @param incomingHeaders - the map of headers from the inbound Jakarta RESTful Web Services request. This will
 * be an empty map if the associated client interface is not part of a Jakarta RESTful Web Services request.
 * @param clientOutgoingHeaders - the read-only map of header parameters specified on the
 * client interface.
 * @return a map of HTTP headers to merge with the clientOutgoingHeaders to be sent to
 * the remote service.
 */
MultivaluedMap<String, String> update(MultivaluedMap<String, String> incomingHeaders,
                                      MultivaluedMap<String, String> clientOutgoingHeaders);
}

@Path("resource")
@RegisterProvider(MyClientResponseFilter.class)
public static class TestResourceImpl {
      @Inject TestDataBase db;

      @Path("test/{path}")
      @Consumes("text/plain")
      @Produces("text/html")
      @POST
      public String test(@PathParam("path") String path, @QueryParam("query")
      String query, String entity) {
         return db.getByName(query);
      }
   }
   @Path("database")
   @RegisterRestClient
   public interface TestDataBase {

      @Path("")
      @POST
      public String getByName(String name);
   }

@Path("database")
@RegisterRestClient(baseUri="https://localhost:8080/webapp")
public interface TestDataBase {
   @Path("")
   @POST
   public String getByName(String name);
}

<fully qualified name of TestDataBase>/mp-rest/url=<URL>

com.bluemonkeydiamond.TestDatabase/mp-rest/url=https://localhost:8080/webapp