public override bool AddStream(Media media, MediaOptions options, MediaStream stream, out MediaStream cachedStream)
{
/* STOCK METHOD (Decompiled) */
Assert.ArgumentNotNull(media, "media");
Assert.ArgumentNotNull(options, "options");
Assert.ArgumentNotNull(stream, "stream");
cachedStream = null;
if (!CanCache(media, options))
{
return(false);
}
MediaCacheRecord cacheRecord = CreateCacheRecord(media, options, stream);
if (cacheRecord == null)
{
return(false);
}
cachedStream = cacheRecord.GetStream();
if (cachedStream == null)
{
return(false);
}
AddToActiveList(cacheRecord);
/* END STOCK */
// we store the site context because on the background thread: without the Sitecore context saved (on a worker thread), that disables the media cache
var currentSite = Context.Site;
cacheRecord.PersistAsync((() => OnAfterPersist(cacheRecord, currentSite)));
return(true);
}
protected virtual void OnAfterPersist(MediaCacheRecord record, SiteContext originalSiteContext)
{
string mediaPath = string.Empty;
try
{
RemoveFromActiveList(record);
// Housekeeping: since we call AddStream() to insert the optimized version, we have to keep AddStream() from calling OnAfterPersist() from that call, causing an optimization loop
var id = record.Media.MediaData.MediaId;
if (StreamsInOptimization.Contains(id))
{
lock (OptimizeLock)
{
if (StreamsInOptimization.Contains(id))
{
StreamsInOptimization.Remove(id);
return;
}
}
}
lock (OptimizeLock)
{
StreamsInOptimization.Add(id);
}
// grab the stream from cache and optimize it
if (!record.HasStream) return;
var stream = record.GetStream();
if (!_optimizer.CanOptimize(stream)) return;
var optimizedStream = _optimizer.Process(stream, record.Options);
mediaPath = stream.MediaItem.MediaPath;
if (optimizedStream == null)
{
Log.Info("Dianoga: async optimazation result was null, not doing any optimizing for {0}".FormatWith(mediaPath), this);
return;
}
// we have to switch the site context because we're on a background thread, and Sitecore.Context is lost (so the site is always null)
// if the site is null the media cache ignores all added entries
using (new SiteContextSwitcher(originalSiteContext))
{
for (int i = 0; i < 5; i++)
{
try
{
// only here to satisfy out param
MediaStream dgafStream;
bool success = AddStream(record.Media, record.Options, optimizedStream, out dgafStream);
if (dgafStream != null) dgafStream.Dispose();
if (!success)
Log.Warn("Dianoga: The media cache rejected adding {0}. This is unexpected!".FormatWith(mediaPath), this);
}
catch (Exception ex)
{
Log.Error("Dianoga: Error occurred adding stream to media cache. Will retry in 10 sec.", ex, this);
Thread.Sleep(10000);
continue;
}
break;
}
}
}
catch (Exception ex)
{
// this runs in a background thread, and an exception here would cause IIS to terminate the app pool. Bad! So we catch/log, just in case.
Log.Error("Dianoga: Exception occurred on the background thread when optimizing: {0}".FormatWith(mediaPath), ex, this);
}
}
protected virtual void OnAfterPersist(MediaCacheRecord record, SiteContext originalSiteContext)
{
string mediaPath = string.Empty;
try
{
RemoveFromActiveList(record);
// Housekeeping: since we call AddStream() to insert the optimized version, we have to keep AddStream() from calling OnAfterPersist() from that call, causing an optimization loop
var id = record.Media.MediaData.MediaId;
if (StreamsInOptimization.Contains(id))
{
lock (OptimizeLock)
{
if (StreamsInOptimization.Contains(id))
{
StreamsInOptimization.Remove(id);
return;
}
}
}
lock (OptimizeLock)
{
StreamsInOptimization.Add(id);
}
// grab the stream from cache and optimize it
if (!record.HasStream)
{
return;
}
var stream = record.GetStream();
if (!_optimizer.CanOptimize(stream))
{
return;
}
var optimizedStream = _optimizer.Process(stream, record.Options);
mediaPath = stream.MediaItem.MediaPath;
if (optimizedStream == null)
{
Log.Info("Dianoga: async optimazation result was null, not doing any optimizing for {0}".FormatWith(mediaPath), this);
return;
}
// we have to switch the site context because we're on a background thread, and Sitecore.Context is lost (so the site is always null)
// if the site is null the media cache ignores all added entries
using (new SiteContextSwitcher(originalSiteContext))
{
for (int i = 0; i < 5; i++)
{
try
{
// only here to satisfy out param
MediaStream dgafStream;
bool success = AddStream(record.Media, record.Options, optimizedStream, out dgafStream);
if (dgafStream != null)
{
dgafStream.Dispose();
}
if (!success)
{
Log.Warn("Dianoga: The media cache rejected adding {0}. This is unexpected!".FormatWith(mediaPath), this);
}
}
catch (Exception ex)
{
Log.Error("Dianoga: Error occurred adding stream to media cache. Will retry in 10 sec.", ex, this);
Thread.Sleep(10000);
continue;
}
break;
}
}
}
catch (Exception ex)
{
// this runs in a background thread, and an exception here would cause IIS to terminate the app pool. Bad! So we catch/log, just in case.
Log.Error("Dianoga: Exception occurred on the background thread when optimizing: {0}".FormatWith(mediaPath), ex, this);
}
}