/// <summary>
/// Opens a database connection with the property settings specified by the
/// <see cref="Npgsql.NpgsqlConnection.ConnectionString">ConnectionString</see>.
/// </summary>
public override void Open()
{
CheckConnectionClosed();
// Check if there is any missing argument.
if (!settings.ContainsKey(Keywords.Host))
{
throw new ArgumentException("Connection string argument missing!",
NpgsqlConnectionStringBuilder.GetKeyName(Keywords.Host));
}
if (!settings.ContainsKey(Keywords.UserName) && !settings.ContainsKey(Keywords.IntegratedSecurity))
{
throw new ArgumentException("Connection string argument missing!",
NpgsqlConnectionStringBuilder.GetKeyName(Keywords.UserName));
}
// Get a Connector, either from the pool or creating one ourselves.
if (Pooling)
{
connector = NpgsqlConnectorPool.ConnectorPoolMgr.RequestConnector(this);
}
else
{
connector = new NpgsqlConnector(this);
connector.ProvideClientCertificatesCallback += ProvideClientCertificatesCallbackDelegate;
connector.CertificateSelectionCallback += CertificateSelectionCallbackDelegate;
connector.CertificateValidationCallback += CertificateValidationCallbackDelegate;
connector.PrivateKeySelectionCallback += PrivateKeySelectionCallbackDelegate;
connector.Open();
}
connector.Notice += NoticeDelegate;
connector.Notification += NotificationDelegate;
connector.StateChanged += connector_StateChanged;
if (SyncNotification)
{
connector.AddNotificationThread();
}
if (Enlist)
{
Promotable.Enlist(Transaction.Current);
}
this.OnStateChange(new StateChangeEventArgs(ConnectionState.Closed, ConnectionState.Open));
}
/// <summary>
/// Find an available pooled connector in the non-shared pool, or create
/// a new one if none found.
/// </summary>
private NpgsqlConnector GetPooledConnector(NpgsqlConnection Connection)
{
ConnectorQueue Queue;
NpgsqlConnector Connector = null;
// We only need to lock all pools when trying to get one pool or create one.
lock (locker)
{
// Try to find a queue.
if (!PooledConnectors.TryGetValue(Connection.ConnectionString, out Queue))
{
Queue = new ConnectorQueue();
Queue.ConnectionLifeTime = Connection.ConnectionLifeTime;
Queue.MinPoolSize = Connection.MinPoolSize;
PooledConnectors[Connection.ConnectionString] = Queue;
}
}
// Now we can simply lock on the pool itself.
lock (Queue)
{
if (Queue.Available.Count > 0)
{
// Found a queue with connectors. Grab the top one.
// Check if the connector is still valid.
Connector = Queue.Available.Dequeue();
Queue.Busy.Add(Connector, null);
}
}
if (Connector != null)
{
if (!Connector.IsValid())
{
lock (Queue)
{
Queue.Busy.Remove(Connector);
}
Connector.Close();
return(GetPooledConnector(Connection)); //Try again
}
return(Connector);
}
lock (Queue)
{
if (Queue.Available.Count + Queue.Busy.Count < Connection.MaxPoolSize)
{
Connector = new NpgsqlConnector(Connection);
Queue.Busy.Add(Connector, null);
}
}
if (Connector != null)
{
Connector.ProvideClientCertificatesCallback += Connection.ProvideClientCertificatesCallbackDelegate;
Connector.CertificateSelectionCallback += Connection.CertificateSelectionCallbackDelegate;
Connector.CertificateValidationCallback += Connection.CertificateValidationCallbackDelegate;
Connector.PrivateKeySelectionCallback += Connection.PrivateKeySelectionCallbackDelegate;
try
{
Connector.Open();
}
catch
{
lock (Queue)
{
Queue.Busy.Remove(Connector);
}
Connector.Close();
throw;
}
// Meet the MinPoolSize requirement if needed.
if (Connection.MinPoolSize > 1)
{
lock (Queue)
{
while (Queue.Available.Count + Queue.Busy.Count < Connection.MinPoolSize)
{
NpgsqlConnector Spare = new NpgsqlConnector(Connection);
Spare.ProvideClientCertificatesCallback += Connection.ProvideClientCertificatesCallbackDelegate;
Spare.CertificateSelectionCallback += Connection.CertificateSelectionCallbackDelegate;
Spare.CertificateValidationCallback += Connection.CertificateValidationCallbackDelegate;
Spare.PrivateKeySelectionCallback += Connection.PrivateKeySelectionCallbackDelegate;
Spare.Open();
Spare.ProvideClientCertificatesCallback -= Connection.ProvideClientCertificatesCallbackDelegate;
Spare.CertificateSelectionCallback -= Connection.CertificateSelectionCallbackDelegate;
Spare.CertificateValidationCallback -= Connection.CertificateValidationCallbackDelegate;
Spare.PrivateKeySelectionCallback -= Connection.PrivateKeySelectionCallbackDelegate;
Queue.Available.Enqueue(Spare);
}
}
}
}
return(Connector);
}
/// <summary>
/// Opens a database connection with the property settings specified by the
/// <see cref="Npgsql.NpgsqlConnection.ConnectionString">ConnectionString</see>.
/// </summary>
public override void Open()
{
CheckConnectionClosed();
// Check if there is any missing argument.
if (!settings.ContainsKey(Keywords.Host))
{
throw new ArgumentException(resman.GetString("Exception_MissingConnStrArg"),
NpgsqlConnectionStringBuilder.GetKeyName(Keywords.Host));
}
if (!settings.ContainsKey(Keywords.UserName) && !settings.ContainsKey(Keywords.IntegratedSecurity))
{
throw new ArgumentException(resman.GetString("Exception_MissingConnStrArg"),
NpgsqlConnectionStringBuilder.GetKeyName(Keywords.UserName));
}
// Get a Connector, either from the pool or creating one ourselves.
if (Pooling)
{
connector = NpgsqlConnectorPool.ConnectorPoolMgr.RequestConnector(this);
}
else
{
connector = new NpgsqlConnector(this);
connector.ProvideClientCertificatesCallback += ProvideClientCertificatesCallbackDelegate;
connector.CertificateSelectionCallback += CertificateSelectionCallbackDelegate;
connector.CertificateValidationCallback += CertificateValidationCallbackDelegate;
connector.PrivateKeySelectionCallback += PrivateKeySelectionCallbackDelegate;
connector.Open();
}
connector.Notice += NoticeDelegate;
connector.Notification += NotificationDelegate;
connector.StateChanged += connector_StateChanged;
if (SyncNotification)
{
connector.AddNotificationThread();
}
if (Enlist)
{
Promotable.Enlist(Transaction.Current);
}
this.OnStateChange(new StateChangeEventArgs(ConnectionState.Closed, ConnectionState.Open));
}
/// <summary>
/// Find an available pooled connector in the non-shared pool, or create
/// a new one if none found.
/// </summary>
private NpgsqlConnector GetPooledConnector(NpgsqlConnection Connection)
{
ConnectorQueue Queue;
NpgsqlConnector Connector = null;
// We only need to lock all pools when trying to get one pool or create one.
lock (locker)
{
// Try to find a queue.
if (!PooledConnectors.TryGetValue(Connection.ConnectionString, out Queue))
{
Queue = new ConnectorQueue();
Queue.ConnectionLifeTime = Connection.ConnectionLifeTime;
Queue.MinPoolSize = Connection.MinPoolSize;
PooledConnectors[Connection.ConnectionString] = Queue;
}
}
// Now we can simply lock on the pool itself.
lock (Queue)
{
if (Queue.Available.Count > 0)
{
// Found a queue with connectors. Grab the top one.
// Check if the connector is still valid.
Connector = Queue.Available.Dequeue();
Queue.Busy.Add(Connector, null);
}
}
if (Connector != null)
{
if (!Connector.IsValid())
{
lock (Queue)
{
Queue.Busy.Remove(Connector);
}
Connector.Close();
return GetPooledConnector(Connection); //Try again
}
return Connector;
}
lock (Queue)
{
if (Queue.Available.Count + Queue.Busy.Count < Connection.MaxPoolSize)
{
Connector = new NpgsqlConnector(Connection);
Queue.Busy.Add(Connector, null);
}
}
if (Connector != null)
{
Connector.ProvideClientCertificatesCallback += Connection.ProvideClientCertificatesCallbackDelegate;
Connector.CertificateSelectionCallback += Connection.CertificateSelectionCallbackDelegate;
Connector.CertificateValidationCallback += Connection.CertificateValidationCallbackDelegate;
Connector.PrivateKeySelectionCallback += Connection.PrivateKeySelectionCallbackDelegate;
try
{
Connector.Open();
}
catch
{
lock (Queue)
{
Queue.Busy.Remove(Connector);
}
Connector.Close();
throw;
}
// Meet the MinPoolSize requirement if needed.
if (Connection.MinPoolSize > 1)
{
lock (Queue)
{
while (Queue.Available.Count + Queue.Busy.Count < Connection.MinPoolSize)
{
NpgsqlConnector Spare = new NpgsqlConnector(Connection);
Spare.ProvideClientCertificatesCallback += Connection.ProvideClientCertificatesCallbackDelegate;
Spare.CertificateSelectionCallback += Connection.CertificateSelectionCallbackDelegate;
Spare.CertificateValidationCallback += Connection.CertificateValidationCallbackDelegate;
Spare.PrivateKeySelectionCallback += Connection.PrivateKeySelectionCallbackDelegate;
Spare.Open();
Spare.ProvideClientCertificatesCallback -= Connection.ProvideClientCertificatesCallbackDelegate;
Spare.CertificateSelectionCallback -= Connection.CertificateSelectionCallbackDelegate;
Spare.CertificateValidationCallback -= Connection.CertificateValidationCallbackDelegate;
Spare.PrivateKeySelectionCallback -= Connection.PrivateKeySelectionCallbackDelegate;
Queue.Available.Enqueue(Spare);
}
}
}
}
return Connector;
}
