Retry patterns in applications and services

private int retryCount = 3
private readonly TimeSpan delay = TimeSpan.FromSeconds(5);


public async Task OperationWithBasicRetryAsync()
{
int currentRetry = 0;


for (;;)
{
try
{
// Call external service.
await TransientOperationAsync();


// Return or break.
break;
}
catch (Exception ex)
{
Trace.TraceError("Operation Exception");


currentRetry++;
if (currentRetry > this.retryCount || !IsTransient(ex))
{
// If this isn't a transient error or we shouldn't retry,
// rethrow the exception.
throw;
}
}


// Wait to retry the operation.
// Consider calculating an exponential delay here and
// using a strategy best suited for the operation and fault.
await Task.Delay(delay);
}
}


// Async method that wraps a call to a remote service (details not shown).
private async Task TransientOperationAsync()
{
...
};
[FunctionName("EventHubTrigger")
[FixedDelayRetry(5, "00:00:10")]
public static async Task Run([EventHubTrigger("myHub", Connection = "EventHubConnection")] EventData[] events, ILogger log)
{
// ...
}]

--

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