public async Task <ILiveResult <TResult> > Execute <TQuery, TResult>(TQuery query, QueryOptions options = null)
where TQuery : IQuery <TModel, TResult>
where TResult : class
{
var schema = _querySchemaRegister.GetByQueryType(typeof(TQuery));
var projectionSchema = _projectionSchemaRegister.FindByModelType(typeof(TModel));
var queryHandler = _serviceProvider.GetRequiredService <IQueryHandler <TQuery, TModel, TResult> >();
var queryParitioner = GetQueryPartitioner <TQuery, TResult>();
var partitionId = queryParitioner?.CalculatePartition(query);
LiveQuery <TQuery, TModel, TResult> liveQuery = new LiveQuery <TQuery, TModel, TResult>(query, partitionId, queryHandler, schema, OnQueryDispose, options);
var streamInfo = _partitions.GetOrAdd(partitionId.HasValue ? partitionId.Value : _rootPartitionId, pid => new DataPartitionStream <TModel>(pid, this, _subscriptionController, projectionSchema, !partitionId.HasValue));
await streamInfo.Catchup();
streamInfo.AppendQuery(liveQuery);
_liveQueries.TryAdd(liveQuery.Query, liveQuery);
// HACK
if (liveQuery.Options.ExpectNotNull)
{
while (liveQuery.Result == null)
{
liveQuery.Load(GetModel());
await Task.Delay(100);
}
}
return(liveQuery);
}
public void AppendQuery <TQuery, TResult>(LiveQuery <TQuery, TModel, TResult> liveQuery) where TQuery : IQuery <TModel, TResult> where TResult : class
{
if (_associatedQueries.TryAdd(liveQuery.Query, liveQuery))
{
// this might fail - projection might not yet processed all the events.
liveQuery.Load(_engine.GetModel());
}
}