public static void GetPassengers(trainCar tc, IMongoDatabase db)
{
var passengerCol = db.GetCollection <passenger>("passengers");
var trainCarCol = db.GetCollection <passenger>("trainCars");
var pp = from tcar in trainCarCol.AsQueryable()
where tcar.Id == tc.Id
join p in passengerCol on tcar.Id equals p.trainCarId into joined
from sub_o in joined.DefaultIfEmpty()
select sub_o;
tc.passengers = pp.ToList <passenger>();
}
private static void Main(string[] args)
{
var server = new MongoClient("mongodb://localhost");
var database = server.GetDatabase("testmongodb");
foreach (var collectionName in database.ListCollections().ToList())
{
database.DropCollection(collectionName[0].AsString);
}
var collection = database.GetCollection <trainCar>("trainCars");
var trainCollection = database.GetCollection <train>("trains");
var peopleCollection = database.GetCollection <passenger>("passengers");
//add some data
for (int t = 0; t < 20; t++)
{
train newTrain = new train();
newTrain.note = "nyc" + t.ToString();
newTrain.trainNo = "345";
newTrain.trainCars = new List <trainCar>();
trainCollection.InsertOne(newTrain);
//add some cars:
for (int i = 0; i < 50; i++)
{
trainCar tcar = new trainCar();
tcar.carNo = "0" + i.ToString();
tcar.note = "Needs new brakes";
tcar.serial = "1234";
tcar.trainId = newTrain.Id;
tcar.passengers = new List <passenger>();
collection.InsertOne(tcar);
newTrain.trainCars.Add(tcar);
for (int p = 0; p < 3; p++)
{
passenger pass = new passenger();
pass.trainCarId = tcar.Id;
pass.Name = "name" + p.ToString();
peopleCollection.InsertOne(pass);
tcar.passengers.Add(pass);
}
}
}
Console.WriteLine("saved");
Stopwatch stopWatch = new Stopwatch();
stopWatch.Start();
//get the data
//asparallel gained me about 15% of qry time
var query = from v in trainCollection.AsQueryable <train>().AsParallel()
select v;
foreach (train aTrain in query)
{
GetTraincars(aTrain, database);
Console.WriteLine("train: " + aTrain.note);
foreach (trainCar tcar2 in aTrain.trainCars)
{
if (tcar2 != null)
{
Console.WriteLine("car: " + tcar2.carNo);
GetPassengers(tcar2, database);
foreach (passenger pass in tcar2.passengers)
{
Console.WriteLine("car: " + tcar2.carNo + " pass: "******"trains loaded");
stopWatch.Stop();
TimeSpan ts = stopWatch.Elapsed;
string elapsedTime = String.Format("{0:00}:{1:00}:{2:00}.{3:00}",
ts.Hours, ts.Minutes, ts.Seconds,
ts.Milliseconds / 10);
Console.WriteLine("RunTime " + elapsedTime);
Console.ReadLine();
}
