/// <summary>
/// Waits until the synchronization semaphore is available, creates a new operation and handles resolution.
/// </summary>
/// <param name="createTimerContext">Creates a <see cref="TimerContext"/> to measure operation latency.</param>
/// <param name="resultProducer">Producer to generate operation calls as a producer-consumer.</param>
/// <param name="onSuccess">Event handler for operation success.</param>
/// <param name="onFailure"></param>
/// <param name="logDiagnostics">Event handler for tracking diagnostics when latency goes above the threshold.</param>
/// <param name="cancellationToken"></param>
/// <returns></returns>
public static async Task PerformOperationAsync(
Func <TimerContext> createTimerContext,
ICTLResultProducer <T> resultProducer,
Action onSuccess,
Action <Exception> onFailure,
Action <T, TimeSpan> logDiagnostics)
{
while (resultProducer.HasMoreResults)
{
using (TimerContext timerContext = createTimerContext())
{
await resultProducer.GetNextAsync().ContinueWith(task =>
{
if (task.IsCompletedSuccessfully)
{
logDiagnostics(task.Result, timerContext.Elapsed);
if (!resultProducer.HasMoreResults)
{
onSuccess();
}
}
else
{
onFailure(task.Exception);
}
});
}
}
}
/// <summary>
/// Waits until the synchronization semaphore is available, creates a new operation and handles resolution.
/// </summary>
/// <param name="semaphoreSlim">Synchronization semaphore that defines maximum degree of parallelism.</param>
/// <param name="diagnosticsLoggingThreshold">Latency threshold above which <paramref name="logDiagnostics"/> will be called.</param>
/// <param name="createTimerContext">Creates a <see cref="TimerContext"/> to measure operation latency.</param>
/// <param name="resultProducer">Producer to generate operation calls as a producer-consumer.</param>
/// <param name="onSuccess">Event handler for operation success.</param>
/// <param name="onFailure"></param>
/// <param name="logDiagnostics">Event handler for tracking diagnostics when latency goes above the threshold.</param>
/// <param name="cancellationToken"></param>
/// <returns></returns>
public static async Task PerformOperationAsync(
SemaphoreSlim semaphoreSlim,
long diagnosticsLoggingThreshold,
Func <TimerContext> createTimerContext,
ICTLResultProducer <T> resultProducer,
Action onSuccess,
Action <Exception> onFailure,
Action <T> logDiagnostics,
CancellationToken cancellationToken)
{
while (resultProducer.HasMoreResults)
{
await semaphoreSlim.WaitAsync(cancellationToken);
using (TimerContext timerContext = createTimerContext())
{
await resultProducer.GetNextAsync().ContinueWith(task =>
{
semaphoreSlim.Release();
long latency = (long)timerContext.Elapsed.TotalMilliseconds;
if (task.IsCompletedSuccessfully)
{
if (latency > diagnosticsLoggingThreshold)
{
logDiagnostics(task.Result);
}
onSuccess();
}
else
{
onFailure(task.Exception);
}
});
}
}
}
