|
private CreateEngine ( Raven.Abstractions.Data.ScriptedPatchRequest patch ) : |
||
| patch | Raven.Abstractions.Data.ScriptedPatchRequest | |
| return | ||
public Jint.JintEngine CheckoutScript(ScriptedPatchRequest request)
{
CachedResult value;
if (cacheDic.TryGetValue(request, out value))
{
Interlocked.Increment(ref value.Usage);
Jint.JintEngine context;
if (value.Queue.TryDequeue(out context))
{
return(context);
}
}
var result = ScriptedJsonPatcher.CreateEngine(request);
var cachedResult = new CachedResult
{
Usage = 1,
Queue = new ConcurrentQueue <Jint.JintEngine>(),
Timestamp = SystemTime.UtcNow
};
cacheDic.AddOrUpdate(request, cachedResult, (_, existing) =>
{
Interlocked.Increment(ref existing.Usage);
return(existing);
});
if (cacheDic.Count > CacheMaxSize)
{
foreach (var source in cacheDic
.OrderByDescending(x => x.Value.Usage)
.ThenBy(x => x.Value.Timestamp)
.Skip(CacheMaxSize))
{
if (Equals(source.Key, request))
{
continue; // we don't want to remove the one we just added
}
CachedResult ignored;
cacheDic.TryRemove(source.Key, out ignored);
}
}
return(result);
}