private ResourcePath ProcessGroup(ResourceCollection set, bool minify, bool cacheRefresh)
{
if (!set.Any())
{
throw new ApplicationException("Cannot process empty group");
}
var firstElement = set.First();
if (set.Count() == 1 && firstElement.IsExternal)
{
return new ResourcePath {
ContentType = firstElement.ContentType, Url = firstElement.Url
}
}
;
var cacheKey = minify ? set.UnqiueId.ToMinPath() : set.UnqiueId;
var upgraded = false;
try
{
cacheLock.EnterUpgradeableReadLock();
var cached = cacheProvider.Get <ResourcePath>(cacheKey);
if (cached != null && cacheRefresh)
{
return(cached);
}
cacheLock.EnterWriteLock();
upgraded = true;
var priorWrite = cacheProvider.Get <ResourcePath>(cacheKey);
if (priorWrite != null && cacheRefresh)
{
return(priorWrite);
}
// regenerate
var result = new ResourcePath();
result.ContentType = firstElement.ContentType;
result.Url = Url.Action("fetch", "resource", new { id = cacheKey });
// mash
result.Contents = set.Mash();
// minify
if (minify)
{
result.Contents = firstElement.ContentType == "text/javascript"
? JavaScriptCompressor.Compress(result.Contents)
: CssCompressor.Compress(result.Contents);
}
// write backup file
var physicalFilePath = GetFilePath(set.UnqiueId, minify);
if (!Directory.Exists(Path.GetDirectoryName(physicalFilePath)))
{
Directory.CreateDirectory(Path.GetDirectoryName(physicalFilePath));
}
if (File.Exists(physicalFilePath))
{
File.Delete(physicalFilePath);
}
File.WriteAllText(physicalFilePath, result.Contents);
result.FileName = physicalFilePath;
cacheProvider.Add(cacheKey, result, set.Files());
return(result);
}
finally
{
if (upgraded)
{
cacheLock.ExitWriteLock();
}
cacheLock.ExitUpgradeableReadLock();
}
}