/// <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;
// 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;
}
// Fix queue use count. Use count may be dropped below zero if Queue was cleared and there were connections open.
if (Queue.UseCount < 0)
{
Queue.UseCount = 0;
}
if (Queue.Count > 0)
{
// Found a queue with connectors. Grab the top one.
// Check if the connector is still valid.
Connector = Queue.Dequeue();
/*try
* {
* Connector.TestConnector();
* Connector.RequireReadyForQuery = true;
* }
* catch //This connector is broken!
* {
* try
* {
* Connector.Close();
* }
* catch
* {
* try
* {
* Connector.Stream.Close();
* }
* catch
* {
* }
* }
* return GetPooledConnector(Connection); //Try again
* }*/
if (!Connector.IsValid())
{
try
{
Connector.Close();
}
catch
{
try
{
Connector.Stream.Close();
}
catch
{
}
}
return(GetPooledConnector(Connection)); //Try again
}
Queue.UseCount++;
}
else if (Queue.Count + Queue.UseCount < Connection.MaxPoolSize)
{
Connector = CreateConnector(Connection);
Connector.ProvideClientCertificatesCallback += Connection.ProvideClientCertificatesCallbackDelegate;
Connector.CertificateSelectionCallback += Connection.CertificateSelectionCallbackDelegate;
Connector.CertificateValidationCallback += Connection.CertificateValidationCallbackDelegate;
Connector.PrivateKeySelectionCallback += Connection.PrivateKeySelectionCallbackDelegate;
try
{
Connector.Open();
}
catch
{
try
{
Connector.Close();
}
catch
{
}
throw;
}
Queue.UseCount++;
}
// Meet the MinPoolSize requirement if needed.
if (Connection.MinPoolSize > 0)
{
while (Queue.Count + Queue.UseCount < Connection.MinPoolSize)
{
NpgsqlConnector Spare = CreateConnector(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.Enqueue(Spare);
}
}
return(Connector);
}
/// <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;
Connector.ValidateRemoteCertificateCallback += Connection.ValidateRemoteCertificateCallbackDelegate;
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.ValidateRemoteCertificateCallback += Connection.ValidateRemoteCertificateCallbackDelegate;
Spare.Open();
Spare.ProvideClientCertificatesCallback -= Connection.ProvideClientCertificatesCallbackDelegate;
Spare.CertificateSelectionCallback -= Connection.CertificateSelectionCallbackDelegate;
Spare.CertificateValidationCallback -= Connection.CertificateValidationCallbackDelegate;
Spare.PrivateKeySelectionCallback -= Connection.PrivateKeySelectionCallbackDelegate;
Spare.ValidateRemoteCertificateCallback -= Connection.ValidateRemoteCertificateCallbackDelegate;
Queue.Available.Enqueue(Spare);
}
}
}
}
return(Connector);
}
/// <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;
// 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;
}
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();
if (!Connector.IsValid())
{
Connector.Close();
return(GetPooledConnector(Connection)); //Try again
}
Queue.Busy.Add(Connector, null);
}
else if (Queue.Available.Count + Queue.Busy.Count < Connection.MaxPoolSize)
{
Connector = CreateConnector(Connection);
Connector.ProvideClientCertificatesCallback += Connection.ProvideClientCertificatesCallbackDelegate;
Connector.CertificateSelectionCallback += Connection.CertificateSelectionCallbackDelegate;
Connector.CertificateValidationCallback += Connection.CertificateValidationCallbackDelegate;
Connector.PrivateKeySelectionCallback += Connection.PrivateKeySelectionCallbackDelegate;
try
{
Connector.Open();
}
catch
{
Connector.Close();
throw;
}
Queue.Busy.Add(Connector, null);
}
// Meet the MinPoolSize requirement if needed.
if (Connection.MinPoolSize > 0)
{
while (Queue.Available.Count + Queue.Busy.Count < Connection.MinPoolSize)
{
NpgsqlConnector Spare = CreateConnector(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);
}
