/// <summary> /// Assigns a new server driver to the connection object /// </summary> /// <param name="groupName">Group name</param> /// <param name="master">True if the server connection to assign must be a master</param> /// <param name="connection">MyCatConnection object where the new driver will be assigned</param> internal static void GetNewConnection(string groupName, bool master, MyCatConnection connection) { do { lock (thisLock) { if (!IsReplicationGroup(groupName)) { return; } ReplicationServerGroup group = GetGroup(groupName); ReplicationServer server = group.GetServer(master, connection.Settings); if (server == null) { throw new MyCatException(Properties.Resources.Replication_NoAvailableServer); } try { bool isNewServer = false; if (connection.driver == null || !connection.driver.IsOpen) { isNewServer = true; } else { MyCatConnectionStringBuilder msb = new MyCatConnectionStringBuilder(server.ConnectionString); if (!msb.Equals(connection.driver.Settings)) { isNewServer = true; } } if (isNewServer) { Driver driver = Driver.Create(new MyCatConnectionStringBuilder(server.ConnectionString)); connection.driver = driver; } return; } catch (MyCatException ex) { connection.driver = null; server.IsAvailable = false; MyCatTrace.LogError(ex.Number, ex.ToString()); if (ex.Number == 1042) { // retry to open a failed connection and update its status group.HandleFailover(server, ex); } else { throw; } } } } while (true); }
/// <summary> /// Gets the next server from a replication group /// </summary> /// <param name="groupName">Group name</param> /// <param name="isMaster">True if the server to return must be a master</param> /// <returns>Replication Server defined by the Load Balancing plugin</returns> internal static ReplicationServer GetServer(string groupName, bool isMaster) { ReplicationServerGroup group = GetGroup(groupName); return(group.GetServer(isMaster)); }