protected T GetOrCreateWithLock <T>(
string key,
Func <T> get,
Func <T> factory,
CacheOptions <T> options
)
{
var result = get();
if (result != null)
{
return(result);
}
var lockObj = GetLock(key);
lock (lockObj)
{
result = get();
if (result != null)
{
return(result);
}
result = factory();
}
RemoveLock(key);
return(result);
}
public virtual Task <HashSet <string> > GetSetAsync(
string key,
Func <IEnumerable <string> > factory = null
)
{
var result =
GetOrCreateWithLock(
key,
() => IMemoryCacheService.Get <HashSet <string> >(key),
() =>
{
var items =
factory != null
? factory()
: new string[] { };
var _result = items.ToHashSet();
var entryOptions = new CacheOptions <HashSet <string> >(expirationType: CacheExpirationType.NotRemoveable);
IMemoryCacheService.Set(key, _result, entryOptions);
return(_result);
},
null
);
return(Task.FromResult(result));
}
public virtual Task <T> GetAsync <T>(
string key,
Func <T> factory = null,
CacheOptions <T> options = null
)
{
var result =
GetOrCreateWithLock(
key,
() => IMemoryCacheService.Get <T>(key),
() =>
{
if (factory == null)
{
return(default(T));
}
var _result = factory();
IMemoryCacheService.Set(key, _result, options);
return(_result);
},
options
);
return(Task.FromResult(result));
}
public virtual Task SetAsync <T>(
string key,
T obj,
CacheOptions <T> options = null
)
{
IMemoryCacheService.Set(key, obj, options);
return(Task.CompletedTask);
}
public MemoryCacheEntryOptions Create <T>(CacheOptions <T> options = null)
{
var timeoutMinutes =
options?.TimeoutMinutes
?? _DefaultTimeoutMinutes;
var timeoutMinutesSpan = TimeSpan.FromMinutes(timeoutMinutes);
if (options == null)
{
return
new MemoryCacheEntryOptions
{
SlidingExpiration = timeoutMinutesSpan
}
}
;
var result = new MemoryCacheEntryOptions();
if (options.ExpirationType == CacheExpirationType.NotRemoveable)
{
result.Priority = CacheItemPriority.NeverRemove;
}
else
{
if (options.ExpirationType == CacheExpirationType.Sliding)
{
result.SlidingExpiration = timeoutMinutesSpan;
}
if (options.ExpirationType == CacheExpirationType.Absolute)
{
result.AbsoluteExpirationRelativeToNow = timeoutMinutesSpan;
}
}
result.RegisterPostEvictionCallback((key, value, reason, state) =>
{
options.DidRemove?.Invoke(options);
if (value is IDisposable disposable)
{
disposable.Dispose();
}
});
return(result);
}
#endregion
}
public Task SetAsync <T>(
string key,
T obj,
CacheOptions <T> cacheOptions = null
)
{
return
(Task.Run(() =>
{
using (var client = GetClient())
{
client.Set(key, obj.ToJsonWithTypeInformation());
if (cacheOptions?.ExpirationType == CacheExpirationType.Absolute)
{
var absoluteExpire = ITimeService.Now.AddMinutes(cacheOptions.TimeoutMinutes);
client.ExpireEntryAt(key, absoluteExpire);
}
return Task.CompletedTask;
}
}));
}
