private void Connect(
IPEndPoint endPoint,
TimeSpan timeout
)
{
var connection = new MongoConnection(null, endPoint); // no connection pool
bool isPrimary;
try {
var isMasterCommand = new CommandDocument("ismaster", 1);
var isMasterResult = connection.RunCommand(server, "admin.$cmd", QueryFlags.SlaveOk, isMasterCommand);
isPrimary = isMasterResult.Response["ismaster", false].ToBoolean();
if (!isPrimary && !server.Settings.SlaveOk)
{
throw new MongoConnectionException("Server is not a primary and SlaveOk is false");
}
maxDocumentSize = isMasterResult.Response["maxBsonObjectSize", server.MaxDocumentSize].ToInt32();
maxMessageLength = Math.Max(MongoDefaults.MaxMessageLength, maxDocumentSize + 1024); // derived from maxDocumentSize
} catch {
try { connection.Close(); } catch { } // ignore exceptions
throw;
}
this.connection = connection;
this.isPrimary = isPrimary;
}
// note: this method will run on a thread from the ThreadPool
private void QueryNodeWorkItem(
object parameters
)
{
// this method has to work at a very low level because the connection pool isn't set up yet
var args = (QueryNodeParameters)parameters;
var response = new QueryNodeResponse {
Address = args.Address, EndPoint = args.EndPoint
};
try {
var connection = new MongoConnection(null, args.EndPoint); // no connection pool
try {
var isMasterCommand = new CommandDocument("ismaster", 1);
var isMasterResult = connection.RunCommand(server, "admin.$cmd", QueryFlags.SlaveOk, isMasterCommand);
response.IsMasterResult = isMasterResult;
response.Connection = connection; // might become the first connection in the connection pool
response.IsPrimary = isMasterResult.Response["ismaster", false].ToBoolean();
response.MaxDocumentSize = isMasterResult.Response["maxBsonObjectSize", server.MaxDocumentSize].ToInt32();
response.MaxMessageLength = Math.Max(MongoDefaults.MaxMessageLength, response.MaxDocumentSize + 1024); // derived from maxDocumentSize
if (server.Settings.ReplicaSetName != null)
{
var getStatusCommand = new CommandDocument("replSetGetStatus", 1);
var getStatusResult = connection.RunCommand(server, "admin.$cmd", QueryFlags.SlaveOk, getStatusCommand);
var replicaSetName = getStatusResult.Response["set"].AsString;
if (replicaSetName != server.Settings.ReplicaSetName)
{
var message = string.Format("Host {0} belongs to a different replica set: {1}", args.EndPoint, replicaSetName);
throw new MongoConnectionException(message);
}
}
} catch {
try { connection.Close(); } catch { } // ignore exceptions
throw;
}
} catch (Exception ex) {
response.Exception = ex;
}
args.ResponseQueue.Enqueue(response);
}