/// <inheritdoc />
public async Task Execute(IJobExecutionContext context)
{
_logger.LogInformation("Dakar Rally simulation started!");
await Task.Delay(3000);
while (!context.CancellationToken.IsCancellationRequested)
{
_logger.LogInformation("Dakar Rally simulator background service is doing background work.");
using IServiceScope scope = _serviceProvider.CreateScope();
DakarRallyDbContext dbContext = scope.ServiceProvider.GetRequiredService <DakarRallyDbContext>();
var race = await dbContext.Set <Race>()
.SingleOrDefaultAsync(x => x.Status == RaceStatus.Running, context.CancellationToken);
if (race != null)
{
await SimulateOneHour(race, dbContext);
}
await Task.Delay(2000);
}
_logger.LogInformation("Dakar Rally simulation finished!");
await Task.CompletedTask;
}
/// <summary>
/// Ensures that the in-memory database is created.
/// </summary>
/// <param name="builder">The application builder.</param>
/// <returns>The same application builder.</returns>
internal static IApplicationBuilder EnsureDatabaseCreated(this IApplicationBuilder builder)
{
using IServiceScope serviceScope = builder.ApplicationServices.CreateScope();
using DakarRallyDbContext dbContext = serviceScope.ServiceProvider.GetRequiredService <DakarRallyDbContext>();
dbContext.Database.EnsureCreated();
dbContext.SeedDatabase();
return(builder);
}
/// <summary>
/// Simulates one hour of race time.
/// </summary>
/// <param name="race">The race that is currently running.</param>
/// <param name="dbContext">The database context.</param>
private async Task SimulateOneHour(Race race, DakarRallyDbContext dbContext)
{
List <Vehicle> vehicles = await dbContext.Set <Vehicle>()
.Include(x => x.RepairmentLength)
.Include(x => x.Speed)
.Include(x => x.MalfunctionProbability)
.Include(x => x.Malfunctions)
.Where(x => x.RaceId == race.Id)
.ToListAsync();
VehicleStatus[] completeStatuses = { VehicleStatus.Broken, VehicleStatus.CompletedRace };
using IServiceScope scope = _serviceProvider.CreateScope();
RacesService _raceService = scope.ServiceProvider.GetRequiredService <RacesService>();
await _raceService.SimulateRaceHour(race, vehicles);
if (vehicles.All(x => completeStatuses.Contains(x.Status)))
{
await _raceService.CompleteRace(race);
}
await dbContext.SaveChangesAsync();
}
/// <summary>
/// Seeds the database with initial data.
/// </summary>
/// <param name="dbContext">The database context.</param>
public static void SeedDatabase(this DakarRallyDbContext dbContext)
{
dbContext.Set <VehicleTypeRepairmentLength>().AddRange(new List <VehicleTypeRepairmentLength>
{
new VehicleTypeRepairmentLength()
{
Id = (int)VehicleType.Truck,
RepairmentLengthInHours = 7,
CreatedOnUtc = DateTime.UtcNow
},
new VehicleTypeRepairmentLength()
{
Id = (int)VehicleType.Car,
RepairmentLengthInHours = 5,
CreatedOnUtc = DateTime.UtcNow
},
new VehicleTypeRepairmentLength()
{
Id = (int)VehicleType.Motorcycle,
RepairmentLengthInHours = 3,
CreatedOnUtc = DateTime.UtcNow
},
});
dbContext.Set <VehicleSubtypeSpeed>().AddRange(new List <VehicleSubtypeSpeed>
{
new VehicleSubtypeSpeed()
{
Id = (int)VehicleSubtype.Truck,
SpeedInKilometersPerHour = 80,
CreatedOnUtc = DateTime.UtcNow
},
new VehicleSubtypeSpeed()
{
Id = (int)VehicleSubtype.TerrainCar,
SpeedInKilometersPerHour = 100,
CreatedOnUtc = DateTime.UtcNow
},
new VehicleSubtypeSpeed()
{
Id = (int)VehicleSubtype.SportsCar,
SpeedInKilometersPerHour = 140,
CreatedOnUtc = DateTime.UtcNow
},
new VehicleSubtypeSpeed()
{
Id = (int)VehicleSubtype.CrossMotorcycle,
SpeedInKilometersPerHour = 85,
CreatedOnUtc = DateTime.UtcNow
},
new VehicleSubtypeSpeed()
{
Id = (int)VehicleSubtype.SportMotorcycle,
SpeedInKilometersPerHour = 130,
CreatedOnUtc = DateTime.UtcNow
},
});
dbContext.Set <VehicleSubtypeMalfunctionProbability>().AddRange(new List <VehicleSubtypeMalfunctionProbability>
{
new VehicleSubtypeMalfunctionProbability()
{
Id = (int)VehicleSubtype.Truck,
LightMalfunctionProbability = 0.06m,
HeavyMalfunctionProbability = 0.04m
},
new VehicleSubtypeMalfunctionProbability()
{
Id = (int)VehicleSubtype.TerrainCar,
LightMalfunctionProbability = 0.03m,
HeavyMalfunctionProbability = 0.01m,
},
new VehicleSubtypeMalfunctionProbability()
{
Id = (int)VehicleSubtype.SportsCar,
LightMalfunctionProbability = 0.12m,
HeavyMalfunctionProbability = 0.02m,
},
new VehicleSubtypeMalfunctionProbability()
{
Id = (int)VehicleSubtype.CrossMotorcycle,
LightMalfunctionProbability = 0.03m,
HeavyMalfunctionProbability = 0.02m,
},
new VehicleSubtypeMalfunctionProbability()
{
Id = (int)VehicleSubtype.SportMotorcycle,
LightMalfunctionProbability = 0.06m,
HeavyMalfunctionProbability = 0.04m,
},
});
dbContext.SaveChanges();
}
