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Code Issues Releases Wiki Activity

persist client count history data across reboots and allow for configurable timespan

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RaidMax
2021-08-29 13:10:10 -05:00
parent a15bcf1469
commit dcf690325c
22 changed files with 213 additions and 59 deletions
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19
Data/Helpers/DataValueCache.cs
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@ -22,33 +22,36 @@ namespace Data.Helpers
public TimeSpan ExpirationTime { get; set; }
public Func<DbSet<T>, CancellationToken, Task<V>> Getter { get; set; }
public V Value { get; set; }
public bool IsExpired => (DateTime.Now - LastRetrieval.Add(ExpirationTime)).TotalSeconds > 0;
public bool IsExpired => ExpirationTime != TimeSpan.MaxValue &&
(DateTime.Now - LastRetrieval.Add(ExpirationTime)).TotalSeconds > 0;
}
public DataValueCache(ILogger<DataValueCache<T, V>> logger, IDatabaseContextFactory contextFactory)
{
_logger = logger;
_contextFactory = contextFactory;
}
public void SetCacheItem(Func<DbSet<T>, CancellationToken, Task<V>> getter, string key, TimeSpan? expirationTime = null)
public void SetCacheItem(Func<DbSet<T>, CancellationToken, Task<V>> getter, string key,
TimeSpan? expirationTime = null)
{
if (_cacheStates.ContainsKey(key))
{
_logger.LogDebug("Cache key {key} is already added", key);
return;
}
var state = new CacheState()
{
Key = key,
Getter = getter,
ExpirationTime = expirationTime ?? TimeSpan.FromMinutes(DefaultExpireMinutes)
};
_cacheStates.Add(key, state);
}
public async Task<V> GetCacheItem(string keyName, CancellationToken cancellationToken = default)
{
if (!_cacheStates.ContainsKey(keyName))
@ -58,7 +61,7 @@ namespace Data.Helpers
var state = _cacheStates[keyName];
if (state.IsExpired)
if (state.IsExpired || state.Value == null)
{
await RunCacheUpdate(state, cancellationToken);
}