public async Task Run([TimerTrigger("%TimedCacheRefresherCronExpression%")] TimerInfo timerInfo, CancellationToken cancellationToken, ILogger log)
{
_logger.LogInformation($"TimedCacheRefresher CRON trigger executed at : {DateTimeOffset.Now}");
Stopwatch stopwatch = Stopwatch.StartNew();
try
{
await _memDistCache.RefreshDataAsync(async (token) => await _volunteersForCacheGetter.GetAllVolunteersAsync(token), CacheKey.AllCachedVolunteerDtos.ToString(), cancellationToken);
}
catch (Exception ex)
{
_logger.LogError("Error running TimedCacheRefresher", ex);
throw;
}
stopwatch.Stop();
_logger.LogInformation($"TimedCacheRefresher CRON trigger took: {stopwatch.Elapsed:%m' min '%s' sec'}");
}
/// <summary>
/// Get volunteers using cache.
/// </summary>
public async Task <IEnumerable <CachedVolunteerDto> > GetCachedVolunteersAsync(VolunteerType volunteerType, CancellationToken cancellationToken)
{
// Don't refresh data in cache because this will be refreshed through a Timed trigger. This is because getting dependencies on a new thread using IServiceScopeFactory throws an error in Azure Functions (Scope disposed{no name, Parent={no name}} is disposed and scoped instances are disposed and no longer available).
IEnumerable <CachedVolunteerDto> cachedVolunteerDtos = await _memDistCache.GetCachedDataAsync(async (token) => await _volunteersForCacheGetter.GetAllVolunteersAsync(token), CacheKey.AllCachedVolunteerDtos.ToString(), RefreshBehaviour.DontRefreshData, cancellationToken);
List <CachedVolunteerDto> matchingVolunteers = cachedVolunteerDtos.Where(x => x.VolunteerType.HasAnyFlags(volunteerType)).ToList();
return(matchingVolunteers);
}
