private float UploadFoodContextData(string settingsBlobUri, bool firstPass)
{
var serviceConfig = new DecisionServiceConfiguration(settingsBlobUri);
if (firstPass)
{
serviceConfig.PollingForModelPeriod = TimeSpan.MinValue;
this.OnlineTrainerReset();
}
using (var service = DecisionService.Create <FoodContext>(serviceConfig))
{
if (!firstPass)
{
Thread.Sleep(10000);
}
string uniqueKey = "scratch-key-gal";
string[] locations = { "HealthyTown", "LessHealthyTown" };
var rg = new Random(uniqueKey.GetHashCode());
int numActions = 3; // ["Hamburger deal 1", "Hamburger deal 2" (better), "Salad deal"]
var csv = new StringBuilder();
int counterCorrect = 0;
int counterTotal = 0;
var header = "Location,Action,Reward";
csv.AppendLine(header);
// number of iterations
for (int i = 0; i < 10000 * locations.Length; i++)
{
// randomly select a location
int iL = rg.Next(0, locations.Length);
string location = locations[iL];
DateTime timeStamp = DateTime.UtcNow;
string key = uniqueKey + Guid.NewGuid().ToString();
FoodContext currentContext = new FoodContext();
currentContext.UserLocation = location;
currentContext.Actions = Enumerable.Range(1, numActions).ToArray();
int[] action = service.ChooseRanking(key, currentContext);
counterTotal += 1;
// We expect healthy town to get salad and unhealthy town to get the second burger (action 2)
if (location.Equals("HealthyTown") && action[0] == 3)
{
counterCorrect += 1;
}
else if (location.Equals("LessHealthyTown") && action[0] == 2)
{
counterCorrect += 1;
}
var csvLocation = location;
var csvAction = action[0].ToString();
float reward = 0;
double currentRand = rg.NextDouble();
if (location.Equals("HealthyTown"))
{
// for healthy town, buy burger 1 with probability 0.1, burger 2 with probability 0.15, salad with probability 0.6
if ((action[0] == 1 && currentRand < 0.1) ||
(action[0] == 2 && currentRand < 0.15) ||
(action[0] == 3 && currentRand < 0.6))
{
reward = 10;
}
}
else
{
// for unhealthy town, buy burger 1 with probability 0.4, burger 2 with probability 0.6, salad with probability 0.2
if ((action[0] == 1 && currentRand < 0.4) ||
(action[0] == 2 && currentRand < 0.6) ||
(action[0] == 3 && currentRand < 0.2))
{
reward = 10;
}
}
service.ReportReward(reward, key);
var newLine = string.Format("{0},{1},{2}", csvLocation, csvAction, "0");
csv.AppendLine(newLine);
System.Threading.Thread.Sleep(1);
}
return((float)counterCorrect / counterTotal);
}
}
public static IReadOnlyCollection <FoodFeature> GetFeaturesFromContext(FoodContext context)
{
return(context.ActionDependentFeatures);
}