/// <summary>
/// Occurs when the strategy is starting to execute.
/// </summary>
/// <param name="context">The contextual information about the item produced.</param>
protected virtual void OnStarted(IProducerConsumerContext <TItem> context)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
context.ConsumptionContext.ExecutionStrategy = this;
ProcessingContext.SetCurrent(context);
}