public async Task <ResponseBase> MakeRequestAsync(RequestBase request)
{
if (string.IsNullOrEmpty(DataDragonVersion))
{
throw new Exception("Data dragon version must be set before making requests");
}
ResponseBase cacheResponse;
// Check cache first, return response if found
try
{
cacheResponse = _cacheClient.CheckImageCache(request);
}
catch (OutOfMemoryException ex)
{
return(new ResponseBase()
{
Exception = ex,
IsFaulted = true
});
}
if (!cacheResponse.IsFaulted)
{
return(cacheResponse);
}
// Does not exist in cache, make download request
try
{
return(await _downloadClient.DownloadIconImageAsync(request, DataDragonVersion));
}
catch (Exception ex)
{
return(new ResponseBase()
{
Exception = ex,
IsFaulted = true
});
}
}
public async Task <ResponseBase> MakeRequestAsync(RequestBase request)
{
// This acts as the key to tell if a download is in progress
string requestId = GetRequestIdentifier(request);
if (requestId == "0" || requestId is null)
{
_log.Warning($"Invalid requestId: {requestId}");
return(new ResponseBase()
{
Exception = new Exception($"requestId is not valid: {requestId}"),
Request = request,
IsFaulted = true
});
}
// 1. If a download is in progress, use the same task to get the result
if (_inProgressTasks.ContainsKey(requestId))
{
// Get the matching in progress task
Task <ResponseBase> responseTask = _inProgressTasks[requestId];
// If the task is complete, remove it
if (responseTask.IsCompleted)
{
if (!_inProgressTasks.TryRemove(requestId, out _))
{
_log.Warning($"Failed to remove in progress task {requestId}");
}
}
// Get the result of the task and return it
ResponseBase result = await responseTask.ConfigureAwait(true);
return(result);
}
// 2. A download is not in progress, is it cached?
ResponseBase cacheResponse = _cacheClient.CheckImageCache(request);
// Fault occurs if cache is unable to find the file, or if the file is corrupted
if (!cacheResponse.IsFaulted)
{
return(cacheResponse);
}
// 3. Does not exist in cache, make download request
try
{
Task <ResponseBase> responseTask = _downloadClient.DownloadIconImageAsync(request);
if (!_inProgressTasks.TryAdd(requestId, responseTask))
{
_log.Warning($"Failed to add in progress task {requestId}");
}
ResponseBase result = await responseTask.ConfigureAwait(true);
return(result);
}
catch (Exception ex)
{
_log.Error($"Failed to download {requestId}. Ex: {ex}");
return(new ResponseBase()
{
Exception = ex,
Request = request,
IsFaulted = true
});
}
}