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oops, touch requests are concurrent...

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This commit is contained in:
Loporrit
2024-09-09 07:03:08 +00:00
parent 908c34f57b
commit 1f57510bb7
3 changed files with 32 additions and 20 deletions
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48
MareSynchronosServer/MareSynchronosStaticFilesServer/Services/ColdTouchHashService.cs
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@@ -1,5 +1,6 @@
using MareSynchronosShared.Services;
using MareSynchronosStaticFilesServer.Utils;
using System.Collections.Concurrent;
namespace MareSynchronosStaticFilesServer.Services;
@@ -10,12 +11,13 @@ public class ColdTouchHashService : ITouchHashService
private readonly IConfigurationService<StaticFilesServerConfiguration> _configuration;
private readonly bool _useColdStorage;
private readonly string _coldStoragePath;
private readonly string _coldStoragePath;
// Debounce multiple updates towards the same file
private readonly Dictionary<string, DateTime> _lastUpdateTimesUtc = new(1009, StringComparer.Ordinal);
private int _cleanupCounter = 0;
private const double _debounceTimeSecs = 90.0;
// Debounce multiple updates towards the same file
private readonly ConcurrentDictionary<string, DateTime> _lastUpdateTimesUtc = new(StringComparer.Ordinal);
private int _cleanupCounter = 0;
private object _cleanupLockObj = new();
private const double _debounceTimeSecs = 900.0;
public ColdTouchHashService(ILogger<ColdTouchHashService> logger, IConfigurationService<StaticFilesServerConfiguration> configuration)
{
@@ -37,31 +39,41 @@ public class ColdTouchHashService : ITouchHashService
public void TouchColdHash(string hash)
{
if (!_useColdStorage)
return;
if (!_useColdStorage)
return;
var nowUtc = DateTime.UtcNow;
var nowUtc = DateTime.UtcNow;
// Clean up debounce dictionary regularly
if (_cleanupCounter++ >= 1000)
{
foreach (var entry in _lastUpdateTimesUtc.Where(entry => (nowUtc - entry.Value).TotalSeconds >= _debounceTimeSecs).ToList())
_lastUpdateTimesUtc.Remove(entry.Key);
// Clean up debounce dictionary regularly
if (_cleanupCounter++ >= 1000)
{
_cleanupCounter = 0;
}
if (Monitor.TryEnter(_cleanupLockObj))
{
try
{
foreach (var entry in _lastUpdateTimesUtc.Where(entry => (nowUtc - entry.Value).TotalSeconds >= _debounceTimeSecs).ToList())
_lastUpdateTimesUtc.TryRemove(entry.Key, out _);
}
finally
{
Monitor.Exit(_cleanupLockObj);
}
}
}
// Ignore multiple updates within a 90 second window of the first
if (_lastUpdateTimesUtc.TryGetValue(hash, out var lastUpdateTimeUtc) && (nowUtc - lastUpdateTimeUtc).TotalSeconds < _debounceTimeSecs)
// Ignore multiple updates within a time window of the first
if (_lastUpdateTimesUtc.TryGetValue(hash, out var lastUpdateTimeUtc) && (nowUtc - lastUpdateTimeUtc).TotalSeconds < _debounceTimeSecs)
{
_logger.LogDebug($"Debounced touch for {hash}");
return;
return;
}
var fileInfo = FilePathUtil.GetFileInfoForHash(_coldStoragePath, hash);
if (fileInfo != null)
{
_logger.LogDebug($"Touching {fileInfo.Name}");
fileInfo.LastAccessTimeUtc = nowUtc;
fileInfo.LastAccessTimeUtc = nowUtc;
_lastUpdateTimesUtc.TryAdd(hash, nowUtc);
}
}