public MySqlPool(MySqlConnectionStringBuilder settings)
{
minSize = settings.MinimumPoolSize;
maxSize = settings.MaximumPoolSize;
if (minSize > maxSize)
{
minSize = maxSize;
}
this.settings = settings;
#if NET20
inUsePool = new List <Driver>((int)maxSize);
idlePool = new Queue <Driver>((int)maxSize);
#else
inUsePool = new ArrayList((int)maxSize);
idlePool = new Queue((int)maxSize);
#endif
// prepopulate the idle pool to minSize
for (int i = 0; i < minSize; i++)
{
idlePool.Enqueue(CreateNewPooledConnection());
}
procedureCache = new ProcedureCache((int)settings.ProcedureCacheSize);
poolGate = new Semaphore((int)maxSize, (int)maxSize);
// we don't really need to create this but it makes the code a bit cleaner
lockObject = new Object();
}
public MySqlPool(MySqlConnectionStringBuilder settings)
{
minSize = settings.MinimumPoolSize;
maxSize = settings.MaximumPoolSize;
available = (int)maxSize;
autoEvent = new AutoResetEvent(false);
if (minSize > maxSize)
{
minSize = maxSize;
}
this.settings = settings;
inUsePool = new List <Driver>((int)maxSize);
idlePool = new Queue <Driver>((int)maxSize);
// prepopulate the idle pool to minSize
for (int i = 0; i < minSize; i++)
{
EnqueueIdle(CreateNewPooledConnection());
}
procedureCache = new ProcedureCache((int)settings.ProcedureCacheSize);
}
/// <summary>
/// Открывает подключение к базе данных со значениями свойств, определяемыми объектом <see cref="MySqlConnection.ConnectionString"/>.
/// </summary>
public override void Open()
{
if (State == ConnectionState.Open)
{
Throw(new InvalidOperationException(MySqlResources.ConnectionAlreadyOpen));
}
#if !RT
// start up our interceptors
exceptionInterceptor = new ExceptionInterceptor(this);
commandInterceptor = new CommandInterceptor(this);
#endif
SetState(ConnectionState.Connecting, true);
AssertPermissions();
#if !RT
// if we are auto enlisting in a current transaction, then we will be
// treating the connection as pooled
if (Settings.AutoEnlist && Transaction.Current != null)
{
driver = DriverTransactionManager.GetDriverInTransaction(Transaction.Current);
if (driver != null &&
(driver.IsInActiveUse ||
!driver.Settings.EquivalentTo(this.Settings)))
{
Throw(new NotSupportedException(MySqlResources.MultipleConnectionsInTransactionNotSupported));
}
}
#endif
try
{
MySqlConnectionStringBuilder currentSettings = Settings;
// Load balancing
if (ReplicationManager.IsReplicationGroup(Settings.Server))
{
if (driver == null)
{
ReplicationManager.GetNewConnection(Settings.Server, false, this);
}
else
{
currentSettings = driver.Settings;
}
}
if (Settings.Pooling)
{
MySqlPool pool = MySqlPoolManager.GetPool(currentSettings);
if (driver == null || !driver.IsOpen)
{
driver = pool.GetConnection();
}
procedureCache = pool.ProcedureCache;
}
else
{
if (driver == null || !driver.IsOpen)
{
driver = Driver.Create(currentSettings);
}
procedureCache = new ProcedureCache((int)Settings.ProcedureCacheSize);
}
}
catch (Exception ex)
{
SetState(ConnectionState.Closed, true);
throw;
}
// if the user is using old syntax, let them know
if (driver.Settings.UseOldSyntax)
{
MySqlTrace.LogWarning(ServerThread,
"You are using old syntax that will be removed in future versions");
}
SetState(ConnectionState.Open, false);
driver.Configure(this);
if (!(driver.SupportsPasswordExpiration && driver.IsPasswordExpired))
{
if (Settings.Database != null && Settings.Database != String.Empty)
{
ChangeDatabase(Settings.Database);
}
}
// setup our schema provider
schemaProvider = new ISSchemaProvider(this);
perfMonitor = new PerformanceMonitor(this);
// if we are opening up inside a current transaction, then autoenlist
// control this with a connection string option
#if !MONO && !RT
if (Transaction.Current != null && Settings.AutoEnlist)
{
EnlistTransaction(Transaction.Current);
}
#endif
hasBeenOpen = true;
SetState(ConnectionState.Open, true);
}
/// <include file='docs/MySqlConnection.xml' path='docs/Open/*'/>
public override void Open()
{
if (State == ConnectionState.Open)
{
throw new InvalidOperationException(System.Data.MySqlClient.Properties.Resources.ConnectionAlreadyOpen);
}
SetState(ConnectionState.Connecting, true);
#if !CF
// if we are auto enlisting in a current transaction, then we will be
// treating the connection as pooled
if (settings.AutoEnlist && Transaction.Current != null)
{
driver = DriverTransactionManager.GetDriverInTransaction(Transaction.Current);
if (driver != null &&
(driver.IsInActiveUse ||
!driver.Settings.EquivalentTo(this.Settings)))
{
throw new NotSupportedException(System.Data.MySqlClient.Properties.Resources.MultipleConnectionsInTransactionNotSupported);
}
}
#endif
try
{
if (settings.Pooling)
{
MySqlPool pool = MySqlPoolManager.GetPool(settings);
if (driver == null)
{
driver = pool.GetConnection();
}
procedureCache = pool.ProcedureCache;
}
else
{
if (driver == null)
{
driver = Driver.Create(settings);
}
procedureCache = new ProcedureCache((int)settings.ProcedureCacheSize);
}
}
catch (Exception)
{
SetState(ConnectionState.Closed, true);
throw;
}
// if the user is using old syntax, let them know
if (driver.Settings.UseOldSyntax)
{
Logger.LogWarning("You are using old syntax that will be removed in future versions");
}
SetState(ConnectionState.Open, false);
driver.Configure(this);
if (settings.Database != null && settings.Database != String.Empty)
{
ChangeDatabase(settings.Database);
}
// setup our schema provider
if (driver.Version.isAtLeast(5, 0, 0))
{
schemaProvider = new ISSchemaProvider(this);
}
else
{
schemaProvider = new SchemaProvider(this);
}
#if !CF
perfMonitor = new PerformanceMonitor(this);
#endif
// if we are opening up inside a current transaction, then autoenlist
// TODO: control this with a connection string option
#if !MONO && !CF
if (Transaction.Current != null && settings.AutoEnlist)
{
EnlistTransaction(Transaction.Current);
}
#endif
hasBeenOpen = true;
SetState(ConnectionState.Open, true);
}