Examples of it.polito.appeal.traci.MultiQuery

it.polito.appeal.traci.MultiQuery
Represents a set of {@link Query}s to run as a whole, i.e. within a single SUMO request and response message. This may significantly reduce the execution time, because the TCP overhead is distributed along all the queries (JUnit tests show a performance increase of ~20x in an Intel T7300 dual core CPU with Linux 2.6.38).
When the queries are added to this class with {@link #add(Query)}, they can be executed with {@link #run()}. @author Enrico Gueli <enrico.gueli@polito.it>

    conn.nextSimStep(); // to clear already read values
    
    start = System.currentTimeMillis();
    for (int r = 0; r < RETRIES; r++) {
      Map<String, Vehicle> vehicles = conn.getVehicleRepository().getAll();
      MultiQuery multi = conn.makeMultiQuery();
      for (Vehicle vehicle : vehicles.values()) {
        multi.add(vehicle.queryReadPosition());
      }
      multi.add(conn.getVehicleRepository().getQuery());
      multi.run();
      conn.nextSimStep();
    }
    long elapsedMulti = System.currentTimeMillis() - start;
    System.out.println("MultiQuery queries: " + elapsedMulti + " ms");

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//    ValueReadQuery<Double> meanSpeed = detector.queryReadLastStepMeanSpeed();
    ValueReadQuery<Integer> vehicleNum = detector.queryReadLastStepVehicleNumber();
//    ValueReadQuery<Set<Vehicle>> vehicles = detector.queryReadLastStepVehicles();
    
    MultiQuery batch = conn.makeMultiQuery();
//    batch.add(meanSpeed);
    batch.add(vehicleNum);
//    batch.add(vehicles);
    
    
    for (int t=0; t<100; t++) {
      conn.nextSimStep();
    }
    
    batch.run();
//    System.out.println(""
//        + ":   " + meanSpeed.get() 
//        + "    " + vehicleNum.get()
//        + "    " + vehicles.get());

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    assertEquals(LOCATION_LOCAL.getY(), out.getY(), 1e-5);
  }
  
  @Test
  public void testMultiConvert() throws IOException {
    MultiQuery mq = conn.makeMultiQuery();
    
    PositionConversionQuery conv1 = conn.queryPositionConversion();
    conv1.setPositionToConvert(LOCATION_LOCAL, true);
    mq.add(conv1);


    PositionConversionQuery conv2 = conn.queryPositionConversion();
    Point2D loc2 = new Point2D.Double(LOCATION_LOCAL.getX() + 5, LOCATION_LOCAL.getY() + 5);
    conv2.setPositionToConvert(loc2, false);
    mq.add(conv2);
    
    mq.run();
    
    Point2D out1 = conv1.get();
    Point2D out2 = conv2.get();


    assertEquals(LOCATION_GEO.getX(), out1.getX(), 1e-5);

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    conn.nextSimStep(); // to clear already read values
    
    start = System.currentTimeMillis();
    for (int r = 0; r < RETRIES; r++) {
      Map<String, Vehicle> vehicles = conn.getVehicleRepository().getAll();
      MultiQuery multi = conn.makeMultiQuery();
      for (Vehicle vehicle : vehicles.values()) {
        multi.add(vehicle.queryReadPosition());
      }
      multi.add(conn.getVehicleRepository().getQuery());
      multi.run();
      conn.nextSimStep();
    }
    long elapsedMulti = System.currentTimeMillis() - start;
    log.info("MultiQuery queries: " + elapsedMulti + " ms");

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Related Classes of it.polito.appeal.traci.MultiQuery

it.polito.appeal.traci.protocol.RequestMessage

it.polito.appeal.traci.protocol.ResponseMessage

it.polito.appeal.traci.test.PositionConvertionTest

it.polito.appeal.traci.test.TraCITest

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