public void Dispose()
{
DisposeHelper.EnsureAllSteps(
() => this.EndTransaction(), //Transaction が生き残っていたら終わらせる
() =>
{
//Connection を Pool に返す
if (this._connection != null)
{
this._pool.ReleaseConnection(this._connection.IndexInPool, this._connection.PayOutNumber);
}
},
() => this._connection = null, //借りてたものをもう使わないという意思表示
() => this._pool = null); //Pool はお外で管理されてるからここでは参照切るだけ
}
private async Task <IConnectionWithId <MySqlConnection> > GetConnectionAsync(ConnectionFactoryParameters parameters, CancellationToken cancellationToken)
{
//取得済ならそのまま使う
if (this._connection != null)
{
return(this._connection.ConnectionWithId);
}
await this._connectionLock.WaitAsync(cancellationToken).ConfigureAwait(false);
try
{
if (this._connection != null)
{
return(this._connection.ConnectionWithId);
}
//未取得の場合は Pool から払い出してもらう
//Strategy が破棄されるまで返さないぞ！
var connection = await this._pool.GetConnectionAsync(
parameters,
_maxExecutionTime,
nameof(GlobalConnectionPoolTransactionStrategy),
cancellationToken)
.ConfigureAwait(false);
this._connection = connection;
if (!string.IsNullOrWhiteSpace(this._overriddenDatabaseName) && connection.ConnectionWithId.Connection.Database != this._overriddenDatabaseName)
{
await connection.ConnectionWithId.Connection.ChangeDatabaseAsync(this._overriddenDatabaseName, cancellationToken).ConfigureAwait(false);
}
return((this._connection = connection).ConnectionWithId);
}
finally
{
this._connectionLock.Release();
}
}
