/**
 * Copyright (c) 2010 Yahoo! Inc. All rights reserved.
 *
 * 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. See accompanying
 * LICENSE file.
 */

package com.yahoo.ycsb.measurements;

import com.yahoo.ycsb.Status;
import com.yahoo.ycsb.measurements.exporter.MeasurementsExporter;

import org.HdrHistogram.Recorder;

import java.io.IOException;

/**
 * delegates to 2 measurement instances.
 * @author nitsanw
 *
 */
public class TwoInOneMeasurement extends OneMeasurement {

  final OneMeasurement thing1,thing2;
  public TwoInOneMeasurement(String name, OneMeasurement thing1,OneMeasurement thing2) {
    super(name);
    this.thing1 = thing1;
    this.thing2 = thing2;
  }

  /**
   * No need for synchronization, using CHM to deal with that
   *
   * @see com.yahoo.ycsb.OneMeasurement#reportStatus(int)
   */
  @Override
  public void reportStatus(final Status status) {
    thing1.reportStatus(status);
  }

  /**
   * It appears latency is reported in micros.
   * Using {@link Recorder} to support concurrent updates to histogram.
   *
   * @see com.yahoo.ycsb.OneMeasurement#measure(int)
   */
  @Override
  public void measure(int latencyInMicros) {
    thing1.measure(latencyInMicros);
    thing2.measure(latencyInMicros);
  }

  /**
   * This is called from a main thread, on orderly termination.
   *
   * @see com.yahoo.ycsb.measurements.OneMeasurement#exportMeasurements(com.yahoo.ycsb.measurements.exporter.MeasurementsExporter)
   */
  @Override
  public void exportMeasurements(MeasurementsExporter exporter) throws IOException {
    thing1.exportMeasurements(exporter);
    thing2.exportMeasurements(exporter);
  }

  /**
   * This is called periodically from the StatusThread. There's a single StatusThread per Client process.
   * We optionally serialize the interval to log on this opportunity.
   * @see com.yahoo.ycsb.measurements.OneMeasurement#getSummary()
   */
  @Override
  public String getSummary() {
    return thing1.getSummary() + "\n" + thing2.getSummary();
  }

}