| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.hadoop.yarn.webapp.util; |
| |
| import com.sun.jersey.api.client.Client; |
| import com.sun.jersey.api.client.ClientHandlerException; |
| import com.sun.jersey.api.client.ClientResponse; |
| import com.sun.jersey.api.client.UniformInterfaceException; |
| import com.sun.jersey.api.client.WebResource; |
| import javax.ws.rs.core.MediaType; |
| |
| import com.sun.jersey.api.json.JSONJAXBContext; |
| import com.sun.jersey.api.json.JSONMarshaller; |
| import org.apache.hadoop.conf.Configuration; |
| import org.codehaus.jettison.json.JSONObject; |
| |
| import java.io.StringWriter; |
| |
| /** |
| * This class contains several utility function which could be used to generate |
| * Restful calls to RM/NM/AHS. |
| * |
| */ |
| public final class YarnWebServiceUtils { |
| |
| private YarnWebServiceUtils() {} |
| |
| /** |
| * Utility function to get NodeInfo by calling RM WebService. |
| * @param conf the configuration |
| * @param nodeId the nodeId |
| * @return a JSONObject which contains the NodeInfo |
| * @throws ClientHandlerException if there is an error |
| * processing the response. |
| * @throws UniformInterfaceException if the response status |
| * is 204 (No Content). |
| */ |
| public static JSONObject getNodeInfoFromRMWebService(Configuration conf, |
| String nodeId) throws ClientHandlerException, |
| UniformInterfaceException { |
| Client webServiceClient = Client.create(); |
| String webAppAddress = WebAppUtils.getRMWebAppURLWithScheme(conf); |
| |
| WebResource webResource = webServiceClient.resource(webAppAddress); |
| |
| ClientResponse response = webResource.path("ws").path("v1") |
| .path("cluster").path("nodes") |
| .path(nodeId).accept(MediaType.APPLICATION_JSON) |
| .get(ClientResponse.class); |
| return response.getEntity(JSONObject.class); |
| } |
| |
| @SuppressWarnings("rawtypes") |
| public static String toJson(Object nsli, Class klass) throws Exception { |
| StringWriter sw = new StringWriter(); |
| JSONJAXBContext ctx = new JSONJAXBContext(klass); |
| JSONMarshaller jm = ctx.createJSONMarshaller(); |
| jm.marshallToJSON(nsli, sw); |
| return sw.toString(); |
| } |
| } |