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More MemoryCache PoC

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This commit is contained in:
Claus Vium 2019-02-07 20:57:42 +01:00
parent 75d90c8e4c
commit 86940e96d5
1 changed files with 21 additions and 12 deletions
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33
MediaBrowser.Providers/TV/TheTVDB/TvDbClientManager.cs
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@ -13,6 +13,7 @@ namespace MediaBrowser.Providers.TV
{
private static volatile TvDbClientManager instance;
// TODO add to DI once Bond's PR is merged
private readonly SemaphoreSlim _cacheWriteLock = new SemaphoreSlim(1, 1);
private static MemoryCache _cache;
private static readonly object syncRoot = new object();
private static TvDbClient tvDbClient;
@ -73,24 +74,32 @@ namespace MediaBrowser.Providers.TV
public async Task<SeriesSearchResult[]> GetSeriesByName(string name, CancellationToken cancellationToken)
{
if (_cache.TryGetValue(name, out SeriesSearchResult[] series))
{
return series;
}
var result = await TvDbClient.Search.SearchSeriesByNameAsync(name, cancellationToken);
_cache.Set(name, result.Data, DateTimeOffset.UtcNow.AddHours(1));
return result.Data;
return await TryGetValue(name,
async () => (await TvDbClient.Search.SearchSeriesByNameAsync(name, cancellationToken)).Data);
}
public async Task<Series> GetSeriesById(int tvdbId, CancellationToken cancellationToken)
{
if (_cache.TryGetValue(tvdbId, out Series series))
return await TryGetValue(tvdbId,
async () => (await TvDbClient.Series.GetAsync(tvdbId, cancellationToken)).Data);
}
private async Task<T> TryGetValue<T>(object key, Func<Task<T>> resultFactory)
{
return series;
if (_cache.TryGetValue(key, out T cachedValue))
{
return cachedValue;
}
using (_cacheWriteLock)
{
if (_cache.TryGetValue(key, out cachedValue))
{
return cachedValue;
}
var result = await resultFactory.Invoke();
_cache.Set(key, result, DateTimeOffset.UtcNow.AddHours(1));
return result;
}
var result = await TvDbClient.Series.GetAsync(tvdbId, cancellationToken);
_cache.Set(tvdbId, result.Data, DateTimeOffset.UtcNow.AddHours(1));
return result.Data;
}
}
}