/// <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">MySqlConnection object where the new driver will be assigned</param> internal static void GetNewConnection(string groupName, bool master, MySqlConnection connection) { do { lock (thisLock) { if (!IsReplicationGroup(groupName)) { return; } ReplicationServerGroup group = GetGroup(groupName); ReplicationServer server = group.GetServer(master, connection.Settings); if (server == null) { throw new MySqlException(MySqlResources.Replication_NoAvailableServer); } try { bool isNewServer = false; if (connection.driver == null || !connection.driver.IsOpen) { isNewServer = true; } else { MySqlConnectionStringBuilder msb = new MySqlConnectionStringBuilder(server.ConnectionString); if (!msb.Equals(connection.driver.Settings)) { isNewServer = true; } } if (isNewServer) { Driver driver = Driver.Create(new MySqlConnectionStringBuilder(server.ConnectionString)); connection.driver = driver; } return; } catch (MySqlException ex) { connection.driver = null; server.IsAvailable = false; MySqlTrace.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> /// Adds a Server Group to the list /// </summary> /// <param name="name">Group name</param> /// <param name="groupType">ServerGroup type reference</param> /// <param name="retryTime">Time between reconnections for failed servers</param> /// <returns>Server Group added</returns> internal static ReplicationServerGroup AddGroup(string name, string groupType, int retryTime) { if (string.IsNullOrEmpty(groupType)) { groupType = "System.Data.MySqlClient.Replication.ReplicationRoundRobinServerGroup"; } Type t = Type.GetType(groupType); ReplicationServerGroup g = (ReplicationServerGroup)Activator.CreateInstance(t, name, retryTime) as ReplicationServerGroup; groups.Add(g); return(g); }
/// <summary> /// Gets a Server Group by name /// </summary> /// <param name="groupName">Group name</param> /// <returns>Server Group if found, otherwise throws an MySqlException</returns> internal static ReplicationServerGroup GetGroup(string groupName) { ReplicationServerGroup group = null; foreach (ReplicationServerGroup g in groups) { if (String.Compare(g.Name, groupName, StringComparison.OrdinalIgnoreCase) != 0) { continue; } group = g; break; } if (group == null) { throw new MySqlException(String.Format(MySqlResources.ReplicationGroupNotFound, groupName)); } return(group); }
//private static Dictionary<string, ReplicationServerSelector> selectors = new Dictionary<string, ReplicationServerSelector>(); static ReplicationManager() { Groups = groups; #if !RT // load up our selectors if (MySqlConfiguration.Settings == null) { return; } foreach (var group in MySqlConfiguration.Settings.Replication.ServerGroups) { ReplicationServerGroup g = AddGroup(group.Name, group.GroupType, group.RetryTime); foreach (var server in group.Servers) { g.AddServer(server.Name, server.IsMaster, server.ConnectionString); } } #endif }
/// <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)); }