private static FilterDefinition <MongoDbSubscription> CreatePrefixFilter(string appId, string?userId, TopicId topic, bool withUser)
{
var filters = new List <FilterDefinition <MongoDbSubscription> >();
if (withUser)
{
filters.Add(Filter.Eq(x => x.UserId, userId));
}
else
{
filters.Add(Filter.Ne(x => x.UserId, userId));
}
filters.Add(Filter.Eq(x => x.AppId, appId));
var index = 0;
foreach (var part in topic.GetParts())
{
var fieldName = $"ta.{index}";
filters.Add(
Filter.Or(
Filter.Eq(fieldName, part),
Filter.Exists(fieldName, false)));
index++;
}
return(Filter.And(filters));
}
public async Task Should_be_fast()
{
var empty = Guid.Empty.ToString();
var count = await _.Repository.Collection.CountDocumentsAsync(new BsonDocument());
var random = new Random();
const int Count = 1_000_000;
if (count < Count)
{
var inserts = new List <MongoDbSubscription>();
for (var i = 0; i < Count; i++)
{
TopicId randomTopic = $"{Guid.NewGuid()}/{random.Next(10000)}/{random.Next(10000)}/{random.Next(10000)}/{random.Next(10000)}/{random.Next(10000)}a";
inserts.Add(new MongoDbSubscription
{
DocId = Guid.NewGuid().ToString(),
AppId = empty,
TopicArray = randomTopic.GetParts(),
TopicPrefix = randomTopic,
UserId = empty
});
}
await _.Repository.Collection.InsertManyAsync(inserts);
}
var topicToSearch = $"{Guid.NewGuid()}/{random.Next(10000)}/{random.Next(10000)}a";
await ToList(_.Repository.QueryAsync(empty, topicToSearch));
await ToList(_.Repository.QueryAsync(empty, topicToSearch));
var watch = Stopwatch.StartNew();
await ToList(_.Repository.QueryAsync(empty, topicToSearch));
watch.Stop();
Assert.InRange(watch.ElapsedMilliseconds, 0, 20);
}