/// <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(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);
}
internal static void GetNewConnection(string groupName, bool master, MySqlConnection connection)
{
while (true)
{
object obj = ReplicationManager.thisLock;
lock (obj)
{
if (ReplicationManager.IsReplicationGroup(groupName))
{
ReplicationServerGroup group = ReplicationManager.GetGroup(groupName);
ReplicationServer server = group.GetServer(master, connection.Settings);
if (server == null)
{
throw new MySqlException(Resources.Replication_NoAvailableServer);
}
try
{
bool flag2 = false;
if (connection.driver == null || !connection.driver.IsOpen)
{
flag2 = true;
}
else if (!new MySqlConnectionStringBuilder(server.ConnectionString).Equals(connection.driver.Settings))
{
flag2 = true;
}
if (flag2)
{
Driver driver = Driver.Create(new MySqlConnectionStringBuilder(server.ConnectionString));
connection.driver = driver;
}
}
catch (MySqlException ex)
{
connection.driver = null;
server.IsAvailable = false;
MySqlTrace.LogError(ex.Number, ex.ToString());
if (ex.Number == 1042)
{
group.HandleFailover(server, ex);
continue;
}
throw;
}
}
}
break;
}
}
/// <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);
if (server == null)
{
throw new MySqlException(Properties.Resources.Replication_NoAvailableServer);
}
Driver driver = Driver.Create(new MySqlConnectionStringBuilder(server.ConnectionString));
if (connection.driver == null ||
driver.Settings.ConnectionString != connection.driver.Settings.ConnectionString)
{
connection.Close();
connection.hasBeenOpen = false;
try
{
connection.driver = driver;
connection.Open();
return;
}
catch (Exception)
{
connection.driver = null;
server.IsAvailable = false;
// retry to open a failed connection and update its status
group.HandleFailover(server);
}
}
else
{
return;
}
}
} while (true);
}
/// <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(Resources.Replication_NoAvailableServer);
}
//根据主连接字符串配置的账号、密码、数据库、端口，使用新的server的连接字符串（不更新，每次都添加）
string newServerConnectionString = $"{server.ConnectionString}uid={connection.Settings.UserID};pwd={connection.Settings.Password};Database={connection.Settings.Database};port={connection.Settings.Port};";
try
{
bool isNewServer = false;
if (connection.driver == null || !connection.driver.IsOpen)
{
isNewServer = true;
}
else
{
MySqlConnectionStringBuilder msb = new MySqlConnectionStringBuilder(newServerConnectionString);
if (!msb.Equals(connection.driver.Settings))
{
isNewServer = true;
}
}
if (isNewServer)
{
var builder = new MySqlConnectionStringBuilder(newServerConnectionString);
MySqlPool pool = MySqlPoolManager.GetPool(builder);
Driver driver = pool.GetConnection();
//Driver driver = Driver.Create(new MySqlConnectionStringBuilder(newServerConnectionString));
connection.driver = driver;
}
return;
}
catch (MySqlException ex)
{
connection.driver = null;
MySqlTrace.LogError(ex.Number, ex.ToString());
if (ex.Number == 1042)
{
//只有连不上的时候才标记为不可用
server.IsAvailable = false;
//连接失败时打印日志（故障情况）
Console.WriteLine("GetNewConnection Before HandleFailover >> Error:{0},{1}Number={2},ConnectionString={3}", ex.Message, ex.InnerException == null ? "" : "InnerException:" + ex.InnerException.Message + ",", ex.Number, newServerConnectionString);
server.ConnectionString = newServerConnectionString;
// retry to open a failed connection and update its status
group.HandleFailover(server, ex);
}
else
{
throw;
}
}
}
} while (true);
}
