using Npgsql.Internal;
using Npgsql.Util;
using System.Diagnostics.CodeAnalysis;
using System.Threading;
using System.Threading.Tasks;
using System.Transactions;
namespace Npgsql;
sealed class MultiHostDataSourceWrapper : NpgsqlDataSource
{
internal override bool OwnsConnectors => false;
readonly NpgsqlMultiHostDataSource _wrappedSource;
public MultiHostDataSourceWrapper(NpgsqlMultiHostDataSource source, TargetSessionAttributes targetSessionAttributes)
: base(CloneSettingsForTargetSessionAttributes(source.Settings, targetSessionAttributes), source.Configuration)
=> _wrappedSource = source;
static NpgsqlConnectionStringBuilder CloneSettingsForTargetSessionAttributes(
NpgsqlConnectionStringBuilder settings,
TargetSessionAttributes targetSessionAttributes)
{
var clonedSettings = settings.Clone();
clonedSettings.TargetSessionAttributesParsed = targetSessionAttributes;
return clonedSettings;
}
internal override (int Total, int Idle, int Busy) Statistics => _wrappedSource.Statistics;
internal override void Clear() => _wrappedSource.Clear();
internal override ValueTask Get(NpgsqlConnection conn, NpgsqlTimeout timeout, bool async, CancellationToken cancellationToken)
=> _wrappedSource.Get(conn, timeout, async, cancellationToken);
internal override bool TryGetIdleConnector([NotNullWhen(true)] out NpgsqlConnector? connector)
=> throw new NpgsqlException("Npgsql bug: trying to get an idle connector from " + nameof(MultiHostDataSourceWrapper));
internal override ValueTask OpenNewConnector(NpgsqlConnection conn, NpgsqlTimeout timeout, bool async, CancellationToken cancellationToken)
=> throw new NpgsqlException("Npgsql bug: trying to open a new connector from " + nameof(MultiHostDataSourceWrapper));
internal override void Return(NpgsqlConnector connector)
=> _wrappedSource.Return(connector);
internal override void AddPendingEnlistedConnector(NpgsqlConnector connector, Transaction transaction)
=> _wrappedSource.AddPendingEnlistedConnector(connector, transaction);
internal override bool TryRemovePendingEnlistedConnector(NpgsqlConnector connector, Transaction transaction)
=> _wrappedSource.TryRemovePendingEnlistedConnector(connector, transaction);
internal override bool TryRentEnlistedPending(Transaction transaction, NpgsqlConnection connection,
[NotNullWhen(true)] out NpgsqlConnector? connector)
=> _wrappedSource.TryRentEnlistedPending(transaction, connection, out connector);
}