code: /*
   * 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 com.intel.hibench.flinkbench.microbench;
  
  import com.intel.hibench.flinkbench.datasource.StreamBase;
  import com.intel.hibench.flinkbench.util.FlinkBenchConfig;
  
  import org.apache.flink.api.common.functions.MapFunction;
  import org.apache.flink.api.common.functions.RichMapFunction;
  import org.apache.flink.api.common.state.ValueState;
  import org.apache.flink.api.common.state.ValueStateDescriptor;
  import org.apache.flink.api.common.typeinfo.TypeHint;
  import org.apache.flink.api.common.typeinfo.TypeInformation;
  import org.apache.flink.api.java.tuple.Tuple2;
  import org.apache.flink.configuration.Configuration;
  import org.apache.flink.streaming.api.datastream.DataStream;
  import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
  
  import com.intel.hibench.common.streaming.metrics.KafkaReporter;
  import com.intel.hibench.common.streaming.UserVisitParser;
  
  public class WordCount extends StreamBase {
  
    @Override
    public void processStream(final FlinkBenchConfig config) throws Exception {
      final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
      env.setBufferTimeout(config.bufferTimeout);
      env.enableCheckpointing(config.checkpointDuration);
      createDataStream(config);
      DataStream<Tuple2<String, String>> dataStream = env.addSource(getDataStream());
      dataStream
          .map(new MapFunction<Tuple2<String, String>, Tuple2<String, Tuple2<String, Integer>>>() {
            @Override
            public Tuple2<String, Tuple2<String, Integer>> map(Tuple2<String, String> input) throws Exception {
              String ip = UserVisitParser.parse(input.f1).getIp();
              //map record to <browser, <timeStamp, 1>> type
              return new Tuple2<String, Tuple2<String, Integer>>(ip, new Tuple2<String, Integer>(input.f0, 1));
            }
          })
          .keyBy(0)
          .map(new RichMapFunction<Tuple2<String, Tuple2<String, Integer>>, Tuple2<String, Tuple2<String, Integer>>>() {
            private transient ValueState<Integer> sum;
  
            @Override
            public Tuple2<String, Tuple2<String, Integer>> map(Tuple2<String, Tuple2<String, Integer>> input) throws Exception {
              int currentSum = sum.value();
              currentSum += input.f1.f1;
              sum.update(currentSum);
              KafkaReporter kafkaReporter = new KafkaReporter(config.reportTopic, config.brokerList);
              kafkaReporter.report(Long.parseLong(input.f1.f0), System.currentTimeMillis());
              return new Tuple2<String, Tuple2<String, Integer>>(input.f0, new Tuple2<String, Integer>(input.f1.f0, currentSum));
            }
  
            @Override
            public void open(Configuration config) {
              ValueStateDescriptor<Integer> descriptor =
                  new ValueStateDescriptor<Integer>(
                      "count", // the state name
                      TypeInformation.of(new TypeHint<Integer>() {
                      }), // type information
                      0); // default value of the state, if nothing was set
              sum = getRuntimeContext().getState(descriptor);
            }
          });
      env.execute("Word Count Job");
    }
  }
  