private async Task EnsureOriginAsync(Trace t)
{
try
{
TraceOrigin traceOrigin;
// try from cache
if (!_cache.TryGetValue(t.Origin, out traceOrigin))
{
_logger.LogDebug("Origin NOT in cache");
// try from db
traceOrigin = await _originsRepository.GetByNameAsync(t.Origin);
if (traceOrigin == null)
{
_logger.LogDebug("Origin NOT in db");
// save data in database
TraceOrigin origin = new TraceOrigin()
{
Origin = t.Origin
};
traceOrigin = _originsRepository.Add(origin);
await _originsRepository.SaveAsync();
_logger.LogDebug("Origin ADDED in db");
}
else
{
_logger.LogDebug("Origin in db");
}
// set cache options
var cacheEntryOptions = new MemoryCacheEntryOptions()
// keep in cache for this time, reset time if accessed
.SetSlidingExpiration(TimeSpan.FromSeconds(5));
// save data in cache
_cache.Set(traceOrigin.Origin, traceOrigin, cacheEntryOptions);
_logger.LogDebug("Origin ADDED in cache");
}
else
{
_logger.LogDebug("Origin in cache");
}
}
catch (Exception ex)
{
_logger.LogError(ex.ToString());
}
}
public TraceOrigin Update(TraceOrigin origin)
{
var item = (from o in _dataContext.TraceOrigins
where o.OriginId == origin.OriginId
select o).SingleOrDefault();
if (item == null)
{
return(null);
}
else
{
item.Origin = origin.Origin;
_dataContext.Update(item);
return(item);
}
}
public TraceOrigin Add(TraceOrigin origin)
{
_dataContext.Add <TraceOrigin>(origin);
return(origin);
}