/// <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(SqlConsoleProvider.Properties.Resources.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>
/// 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));
}
