001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements.  See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership.  The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the
007     * "License"); you may not use this file except in compliance
008     * with the License.  You may obtain a copy of the License at
009     *
010     *     http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing, software
013     * distributed under the License is distributed on an "AS IS" BASIS,
014     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    
019    package org.apache.hadoop.yarn.util.timeline;
020    
021    import java.io.IOException;
022    import java.net.InetSocketAddress;
023    
024    import org.apache.hadoop.classification.InterfaceAudience.Public;
025    import org.apache.hadoop.classification.InterfaceStability.Evolving;
026    import org.apache.hadoop.conf.Configuration;
027    import org.apache.hadoop.io.Text;
028    import org.apache.hadoop.security.SecurityUtil;
029    import org.apache.hadoop.yarn.conf.YarnConfiguration;
030    import org.apache.hadoop.yarn.webapp.YarnJacksonJaxbJsonProvider;
031    import org.codehaus.jackson.JsonGenerationException;
032    import org.codehaus.jackson.map.JsonMappingException;
033    import org.codehaus.jackson.map.ObjectMapper;
034    
035    /**
036     * The helper class for the timeline module.
037     * 
038     */
039    @Public
040    @Evolving
041    public class TimelineUtils {
042    
043      private static ObjectMapper mapper;
044    
045      static {
046        mapper = new ObjectMapper();
047        YarnJacksonJaxbJsonProvider.configObjectMapper(mapper);
048      }
049    
050      /**
051       * Serialize a POJO object into a JSON string not in a pretty format
052       * 
053       * @param o
054       *          an object to serialize
055       * @return a JSON string
056       * @throws IOException
057       * @throws JsonMappingException
058       * @throws JsonGenerationException
059       */
060      public static String dumpTimelineRecordtoJSON(Object o)
061          throws JsonGenerationException, JsonMappingException, IOException {
062        return dumpTimelineRecordtoJSON(o, false);
063      }
064    
065      /**
066       * Serialize a POJO object into a JSON string
067       * 
068       * @param o
069       *          an object to serialize
070       * @param pretty
071       *          whether in a pretty format or not
072       * @return a JSON string
073       * @throws IOException
074       * @throws JsonMappingException
075       * @throws JsonGenerationException
076       */
077      public static String dumpTimelineRecordtoJSON(Object o, boolean pretty)
078          throws JsonGenerationException, JsonMappingException, IOException {
079        if (pretty) {
080          return mapper.writerWithDefaultPrettyPrinter().writeValueAsString(o);
081        } else {
082          return mapper.writeValueAsString(o);
083        }
084      }
085    
086      public static InetSocketAddress getTimelineTokenServiceAddress(
087          Configuration conf) {
088        InetSocketAddress timelineServiceAddr = null;
089        if (YarnConfiguration.useHttps(conf)) {
090          timelineServiceAddr = conf.getSocketAddr(
091              YarnConfiguration.TIMELINE_SERVICE_WEBAPP_HTTPS_ADDRESS,
092              YarnConfiguration.DEFAULT_TIMELINE_SERVICE_WEBAPP_HTTPS_ADDRESS,
093              YarnConfiguration.DEFAULT_TIMELINE_SERVICE_WEBAPP_HTTPS_PORT);
094        } else {
095          timelineServiceAddr = conf.getSocketAddr(
096              YarnConfiguration.TIMELINE_SERVICE_WEBAPP_ADDRESS,
097              YarnConfiguration.DEFAULT_TIMELINE_SERVICE_WEBAPP_ADDRESS,
098              YarnConfiguration.DEFAULT_TIMELINE_SERVICE_WEBAPP_PORT);
099        }
100        return timelineServiceAddr;
101      }
102    
103      public static Text buildTimelineTokenService(Configuration conf) {
104        InetSocketAddress timelineServiceAddr =
105            getTimelineTokenServiceAddress(conf);
106        return SecurityUtil.buildTokenService(timelineServiceAddr);
107      }
108    }