/*
* Copyright © 2014 Cask Data, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package co.cask.cdap.client;
import co.cask.cdap.client.config.ClientConfig;
import co.cask.cdap.client.exception.UnAuthorizedAccessTokenException;
import co.cask.cdap.client.util.RESTClient;
import co.cask.cdap.common.http.HttpMethod;
import co.cask.cdap.common.http.HttpResponse;
import co.cask.cdap.common.http.ObjectResponse;
import co.cask.cdap.proto.ServiceMeta;
import java.io.IOException;
import java.net.URL;
import javax.inject.Inject;
/**
* Provides ways to interact with CDAP User Services.
*/
public class ServiceClient {
private final RESTClient restClient;
private final ClientConfig config;
@Inject
public ServiceClient(ClientConfig config) {
this.config = config;
this.restClient = RESTClient.create(config);
}
/**
* Gets information about a service.
*
* @param appId ID of the application that the service belongs to
* @param serviceId ID of the service
* @return {@link ServiceMeta} representing the service.
* @throws IOException if a network error occurred
* @throws UnAuthorizedAccessTokenException if the request is not authorized successfully in the gateway server
*/
public ServiceMeta get(String appId, String serviceId) throws IOException, UnAuthorizedAccessTokenException {
URL url = config.resolveURL(String.format("apps/%s/services/%s", appId, serviceId));
HttpResponse response = restClient.execute(HttpMethod.GET, url, config.getAccessToken());
return ObjectResponse.fromJsonBody(response, ServiceMeta.class).getResponseObject();
}
}