/// <summary>
/// Sends the command core.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="factory">The factory.</param>
/// <param name="database">The database.</param>
/// <param name="rootType">Type of serialization root.</param>
/// <param name="command">The spec.</param>
/// <returns></returns>
private T SendCommandCore <T>(ISerializationFactory factory, string database, Type rootType, object command)
where T : class
{
var writerSettings = factory.GetBsonWriterSettings(rootType);
var query = new QueryMessage(writerSettings)
{
FullCollectionName = database + ".$cmd",
NumberToReturn = -1,
Query = command
};
var readerSettings = factory.GetBsonReaderSettings(typeof(T));
try
{
var reply = SendTwoWayMessageCore <T>(query, readerSettings);
if (reply.CursorId > 0)
{
SendMessage(new KillCursorsMessage(reply.CursorId), database);
}
return(reply.Documents.FirstOrDefault());
}
catch (IOException exception)
{
throw new MongoConnectionException("Could not read data, communication failure", this, exception);
}
}
/// <summary>
/// Retrieves the data.
/// </summary>
/// <typeparam name="TReply">The type of the reply.</typeparam>
/// <returns></returns>
private ReplyMessage <TReply> RetrieveData <TReply>() where TReply : class
{
IsModifiable = false;
IRequestMessage message;
if (Id <= 0)
{
var writerSettings = _serializationFactory.GetBsonWriterSettings(typeof(T));
message = new QueryMessage(writerSettings)
{
FullCollectionName = FullCollectionName,
Query = BuildSpec(),
NumberToReturn = _limit,
NumberToSkip = _skip,
Options = _options,
ReturnFieldSelector = ConvertFieldSelectorToDocument(_fields)
};
}
else
{
message = new GetMoreMessage(FullCollectionName, Id, _limit);
}
var readerSettings = _serializationFactory.GetBsonReaderSettings(typeof(T));
try
{
var reply = _connection.SendTwoWayMessage <TReply>(message, readerSettings, _databaseName);
Id = reply.CursorId;
if ((reply.ResponseFlag & ResponseFlags.QueryFailure) != 0)
{
var error = "Review server log to get the error.";
if (reply.Documents.Length > 0)
{
var document = reply.Documents[0] as Document;
if (document != null)
{
error = Convert.ToString(document["$err"]);
}
}
throw new MongoException("The query failed on server. " + error);
}
return(reply);
}
catch (IOException exception)
{
throw new MongoConnectionException("Could not read data, communication failure", _connection, exception);
}
}
/// <summary>
/// Retrieves the data.
/// </summary>
/// <typeparam name="TReply">The type of the reply.</typeparam>
/// <returns></returns>
private ReplyMessage <TReply> RetrieveData <TReply>() where TReply : class
{
IsModifiable = false;
IRequestMessage message;
if (Id <= 0)
{
var writerSettings = _serializationFactory.GetBsonWriterSettings(typeof(T));
message = new QueryMessage(writerSettings)
{
FullCollectionName = FullCollectionName,
Query = BuildSpec(),
NumberToReturn = _limit,
NumberToSkip = _skip,
Options = _options,
ReturnFieldSelector = ConvertFieldSelectorToDocument(_fields)
};
}
else
{
message = new GetMoreMessage(FullCollectionName, Id, _limit);
}
var readerSettings = _serializationFactory.GetBsonReaderSettings(typeof(T));
try
{
var reply = _connection.SendTwoWayMessage <TReply>(message, readerSettings, _databaseName);
Id = reply.CursorId;
return(reply);
}
catch (IOException exception)
{
throw new MongoConnectionException("Could not read data, communication failure", _connection, exception);
}
}