public ICacheEntry CreateEntry(object key)
{
if (key is null)
{
throw new ArgumentNullException(nameof(key));
}
if (_cacheConfiguration.Enabled)
{
ICacheEntry entry = _memoryCache.CreateEntry(new CacheEntryKey(_name, key));
if (_cacheConfiguration.Expiry.Type == CacheExpiryType.Absolute)
{
entry.SetAbsoluteExpiration(_cacheConfiguration.Expiry.TTL);
}
else if (_cacheConfiguration.Expiry.Type == CacheExpiryType.Sliding)
{
entry.SetSlidingExpiration(_cacheConfiguration.Expiry.TTL);
}
return(entry);
}
return(new CacheEntry(key));
}
Task <Song> GenerateCacheEntry(ICacheEntry cacheEntry, uint songID, CancellationToken cancellation)
{
lock (cacheEntry) {
if (cacheEntry.Value is Task <Song> generating)
{
return(generating);
}
else
{
cacheEntry.SetSlidingExpiration(TimeSpan.FromHours(24));
Task <Song> result = this.FetchOrGenerateSong(songID, cancellation);
cacheEntry.SetAbsoluteExpiration(TimeSpan.FromDays(7));
cacheEntry.Value = result;
cacheEntry.Dispose();
result.ContinueWith(songTask => {
if (!songTask.IsCompletedSuccessfully)
{
return;
}
Song song = songTask.Result;
cacheEntry.SetSize(
song.Title?.Length + song.Lyrics?.Length +
song.GeneratorError?.Length ?? 64);
});
return(result);
}
}
}
private static User PrepareUserResult(ICacheEntry cacheEntry, AutoRestClients.PlatformModuleApi.Models.ApplicationUserExtended userDto)
{
if (userDto != null)
{
cacheEntry.SetAbsoluteExpiration(TimeSpan.FromMinutes(1));
cacheEntry.AddExpirationToken(SecurityCacheRegion.CreateChangeToken(userDto.Id));
return(userDto.ToUser());
}
return(null);
}
/// <summary>
/// Adds an object to distributed cache
/// </summary>
/// <param name="key">Cache Key</param>
/// <param name="value">Cache object</param>
/// <param name="options">Distributed cache options. <see cref="ExtendedDistributedCacheEntryOptions"/></param>
public void Set(string key, byte[] value, ExtendedDistributedCacheEntryOptions options)
{
if (key == null)
{
throw new ArgumentNullException(nameof(key));
}
if (value == null)
{
throw new ArgumentNullException(nameof(value));
}
if (options == null)
{
throw new ArgumentNullException(nameof(options));
}
using (ICacheEntry cacheEntry = CreateEntry(key))
{
var memoryCacheEntryOptions = GetMemoryCacheEntryOptions(options, value.LongLength);
cacheEntry.SetOptions(memoryCacheEntryOptions);
if (memoryCacheEntryOptions.AbsoluteExpiration != null)
{
cacheEntry.SetAbsoluteExpiration(memoryCacheEntryOptions.AbsoluteExpiration.Value);
}
if (memoryCacheEntryOptions.AbsoluteExpirationRelativeToNow != null)
{
cacheEntry.SetAbsoluteExpiration(memoryCacheEntryOptions.AbsoluteExpirationRelativeToNow.Value);
}
if (memoryCacheEntryOptions.SlidingExpiration != null)
{
cacheEntry.SetSlidingExpiration(memoryCacheEntryOptions.SlidingExpiration.Value);
}
cacheEntry.SetPriority(memoryCacheEntryOptions.Priority);
cacheEntry.SetSize(value.LongLength);
cacheEntry.SetValue(value);
}
}
private async Task <IGitHubClient> createNewGitHubClient(ICacheEntry cacheEntry, long installationId)
{
var gitHubClient = new GitHubClient(new Octokit.ProductHeaderValue("Ahk"))
{
Credentials = new Credentials(await getInstallationToken(installationId))
};
gitHubClient.SetRequestTimeout(TimeSpan.FromSeconds(15));
cacheEntry.SetValue(gitHubClient);
cacheEntry.SetAbsoluteExpiration(TimeSpan.FromMinutes(5));
return(gitHubClient);
}
private void SetExpiration(ICacheEntry entry, CancellationTokenSource tokenSourceBeforeComputingValue, double inMinutes, Action <ICacheEntry>?configureEntry = null)
{
lock (_tokenSourceSync)
{
configureEntry?.Invoke(entry);
if (tokenSourceBeforeComputingValue != ClearCacheTokenSource)
{
entry.SetAbsoluteExpiration(TimeSpan.FromTicks(1));
}
else
{
entry.SetSlidingExpiration(TimeSpan.FromMinutes(inMinutes))
.AddExpirationToken(new CancellationChangeToken(ClearCacheTokenSource.Token));
}
}
}
/// <summary>
/// 设置默认缓存时间，3分钟。
/// </summary>
/// <param name="cache">缓存实体接口。</param>
/// <returns>返回缓存实体接口。</returns>
public static ICacheEntry SetDefaultAbsoluteExpiration(this ICacheEntry cache)
{
return(cache.SetAbsoluteExpiration(Cores.DefaultCacheExpiration));
}
void SetupCacheEntry(ICacheEntry cacheEntry)
{
cacheEntry.SetSize(_cacheSize);
cacheEntry.SetSlidingExpiration(_slidingExpirationTime);
cacheEntry.SetAbsoluteExpiration(_absoluteExpirationTime);
}
