// internal methods
internal MongoConnection AcquireConnection(MongoDatabase database)
{
MongoConnection connection;
lock (_serverInstanceLock)
{
if (_state != MongoServerState.Connected)
{
var message = string.Format("Server instance {0} is no longer connected.", _address);
throw new InvalidOperationException(message);
}
}
connection = _connectionPool.AcquireConnection(database);
// check authentication outside the lock because it might involve a round trip to the server
try
{
connection.CheckAuthentication(database); // will authenticate if necessary
}
catch (MongoAuthenticationException)
{
// don't let the connection go to waste just because authentication failed
_connectionPool.ReleaseConnection(connection);
throw;
}
return(connection);
}
/// <summary>
/// Checks whether the server is alive (throws an exception if not).
/// </summary>
public void Ping()
{
var connection = connectionPool.AcquireConnection(null);
try {
var pingCommand = new CommandDocument("ping", 1);
connection.RunCommand("admin.$cmd", QueryFlags.SlaveOk, pingCommand);
} finally {
connectionPool.ReleaseConnection(connection);
}
}
internal void Connect(
bool slaveOk
)
{
if (state != MongoServerState.Disconnected)
{
var message = string.Format("MongoServerInstance.Connect called when state is: {0}", state);
throw new InvalidOperationException(message);
}
State = MongoServerState.Connecting;
connectException = null;
try {
endPoint = address.ToIPEndPoint(server.Settings.AddressFamily);
var connectionPool = new MongoConnectionPool(this);
try {
var connection = connectionPool.AcquireConnection(null);
try {
try {
var isMasterCommand = new CommandDocument("ismaster", 1);
isMasterResult = connection.RunCommand("admin.$cmd", QueryFlags.SlaveOk, isMasterCommand);
} catch (MongoCommandException ex) {
isMasterResult = ex.CommandResult;
throw;
}
isPrimary = isMasterResult.Response["ismaster", false].ToBoolean();
isSecondary = isMasterResult.Response["secondary", false].ToBoolean();
isPassive = isMasterResult.Response["passive", false].ToBoolean();
isArbiter = isMasterResult.Response["arbiterOnly", false].ToBoolean();
if (!isPrimary && !slaveOk)
{
throw new MongoConnectionException("Server is not a primary and SlaveOk is false");
}
maxDocumentSize = isMasterResult.Response["maxBsonObjectSize", MongoDefaults.MaxDocumentSize].ToInt32();
maxMessageLength = Math.Max(MongoDefaults.MaxMessageLength, maxDocumentSize + 1024); // derived from maxDocumentSize
} finally {
connectionPool.ReleaseConnection(connection);
}
} catch {
connectionPool.Close();
throw;
}
State = MongoServerState.Connected;
this.connectionPool = connectionPool;
} catch (Exception ex) {
State = MongoServerState.Disconnected;
connectException = ex;
throw;
}
}
internal MongoConnection AcquireConnection(
MongoDatabase database
)
{
var connection = connectionPool.AcquireConnection(database);
try {
connection.CheckAuthentication(database); // will authenticate if necessary
} catch (MongoAuthenticationException) {
// don't let the connection go to waste just because authentication failed
connectionPool.ReleaseConnection(connection);
throw;
}
return(connection);
}