public WriteConcernResult Execute(MongoConnection connection)
{
using (var buffer = new BsonBuffer(new MultiChunkBuffer(BsonChunkPool.Default), true))
{
var readerSettings = GetNodeAdjustedReaderSettings(connection.ServerInstance);
var writerSettings = GetNodeAdjustedWriterSettings(connection.ServerInstance);
var message = new MongoDeleteMessage(writerSettings, CollectionFullName, _flags, _query);
message.WriteToBuffer(buffer);
return SendMessageWithWriteConcern(connection, buffer, message.RequestId, readerSettings, writerSettings, WriteConcern);
}
}
// public methods
public WriteConcernResult Execute(MongoConnection connection)
{
var serverInstance = connection.ServerInstance;
if (serverInstance.Supports(FeatureId.WriteCommands) && _args.WriteConcern.Enabled)
{
var emulator = new DeleteOpcodeOperationEmulator(_args);
return emulator.Execute(connection);
}
var requests = _args.Requests.ToArray();
if (requests.Length != 1)
{
throw new NotSupportedException("Delete Opcode only supports a single delete request.");
}
var deleteRequest = (DeleteRequest)requests[0];
RemoveFlags flags;
switch (deleteRequest.Limit)
{
case 0: flags = RemoveFlags.None; break;
case 1: flags = RemoveFlags.Single; break;
default: throw new NotSupportedException("Delete Opcode only supports limit values of 0 and 1.");
}
SendMessageWithWriteConcernResult sendMessageResult;
using (var stream = new MemoryStream())
{
var maxDocumentSize = connection.ServerInstance.MaxDocumentSize;
var message = new MongoDeleteMessage(WriterSettings, CollectionFullName, flags, maxDocumentSize, deleteRequest.Query);
message.WriteTo(stream);
sendMessageResult = SendMessageWithWriteConcern(connection, stream, message.RequestId, ReaderSettings, WriterSettings, WriteConcern);
}
return WriteConcern.Enabled ? ReadWriteConcernResult(connection, sendMessageResult) : null;
}