/// <summary>
/// Builds a <see cref="FilterDefinition{BsonDocument}" /> corresponding to the <see cref="EventHorizonKey" /> supplied
/// </summary>
/// <param name="key">An <see cref="EventHorizonKey" /></param>
/// <returns>A <see cref="FilterDefinition{BsonDocument}" /> corresponding to the <see cref="EventHorizonKey" /></returns>
public static FilterDefinition <BsonDocument> ToFilter(this EventHorizonKey key)
{
var builder = Builders <BsonDocument> .Filter;
var filter = builder.Eq(Constants.ID, key.AsId());
return(filter);
}
/// <inheritdoc />
public ulong GetOffset(EventHorizonKey eventHorizon)
{
using (var es = _database.GetContext())
{
return(es.GeodesicsOffsets.SingleOrDefault(_ => _.Id == eventHorizon.AsId())?.Value ?? 0);
}
}
/// <summary>
/// Transforms the <see cref="EventHorizonKey"/> and offset to <see cref="BsonDocument"/>
/// </summary>
/// <param name="key"></param>
/// <param name="offset"></param>
/// <returns></returns>
public static BsonDocument ToOffsetBson(this EventHorizonKey key, ulong offset)
{
return(new BsonDocument(new Dictionary <string, object>
{
{ Constants.ID, key.AsId() },
{ Constants.OFFSET, offset }
}));
}
/// <inheritdoc />
public void SetOffset(EventHorizonKey key, ulong offset)
{
using (var es = _database.GetContext())
{
//TODO: this can be optimized so that the update is the thing we expect most and the insert is the edge case
var commandText = "INSERT OR REPLACE INTO GeodesicsOffsets (Id, Value) VALUES (@Id,@Value);";
var id = new SqliteParameter("@Id", key.AsId());
var value = new SqliteParameter("@Value", offset);
es.Database.ExecuteSqlCommand(commandText, id, value);
}
}
/// <summary>
///
/// </summary>
/// <param name="key"></param>
/// <param name="offset"></param>
/// <returns></returns>
public static GeodesicsOffset From(EventHorizonKey key, ulong offset)
{
return(new GeodesicsOffset {
Id = key.AsId(), Value = offset
});
}
/// <summary>
///
/// </summary>
/// <param name="key"></param>
/// <param name="offset"></param>
/// <param name="partitionKey"></param>
/// <returns></returns>
public static Offset From(EventHorizonKey key, ulong offset, string partitionKey)
{
return(new Offset {
Id = key.AsId(), Value = offset, PartitionKey = partitionKey
});
}
Offset GetOffsetDoc(EventHorizonKey key)
{
return(_config.Client.CreateDocumentQuery <Offset>(_config.OffsetsUri, GetFeedOptions())
.Where(_ => _.Id == key.AsId()).Take(1).AsEnumerable().SingleOrDefault());
}