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.stormbench.trident.functions;
  
  import com.google.common.collect.ImmutableMap;
  import com.intel.hibench.common.streaming.metrics.KafkaReporter;
  import com.intel.hibench.common.streaming.metrics.LatencyReporter;
  import com.intel.hibench.stormbench.util.StormBenchConfig;
  import org.apache.storm.trident.operation.MapFunction;
  import org.apache.storm.trident.tuple.TridentTuple;
  import org.apache.storm.tuple.Values;
  
  
  public class Identity implements MapFunction {
  
    private final StormBenchConfig config;
  
    public Identity(StormBenchConfig config) {
      this.config = config;
    }
  
    @Override
    public Values execute(TridentTuple tridentTuple) {
      ImmutableMap<String, String> kv = (ImmutableMap<String, String>) tridentTuple.getValue(0);
      LatencyReporter reporter = new KafkaReporter(config.reporterTopic, config.brokerList);
      reporter.report(Long.parseLong(kv.keySet().iterator().next()),
          System.currentTimeMillis());
      return new Values(kv);
    }
  }
  