Bitmap AddOrGetFromCache(Uri uri, IAssetLoader assets, Uri fallbackUri = null)
{
if (_cache.TryGetValue(uri, out Bitmap image))
{
return(image);
}
try
{
image = new Bitmap(assets.Open(uri));
_cache.Set(uri, image);
}
catch (FileNotFoundException)
{
if (fallbackUri == null)
{
return(null);
}
if (_cache.TryGetValue(fallbackUri, out image))
{
return(image);
}
image = new Bitmap(assets.Open(fallbackUri));
_cache.Set(fallbackUri, image);
}
return(image);
}
public override async Task <HashSet <string> > GetSetAsync(
string key,
Func <IEnumerable <string> > factory = null
)
{
var result = IMemoryCacheService.Get <HashSet <string> >(key);
if (result != null)
{
return(result);
}
var values = await IRedisGatewayService.GetSetAsync <string>(key);
if (!values.HasContent())
{
values = factory.Invoke().ToHashSet();
}
await IRedisGatewayService.SetSetAsync(key, values);
result = values.ToHashSet();
if (_UseCacheAside)
{
var entryOptions = new CacheOptions <HashSet <string> >(expirationType: CacheExpirationType.NotRemoveable);
IMemoryCacheService.Set(key, result, entryOptions);
}
return(result);
}
public async Task <IDynamicCollection <T> > GetOrCreateAsync <T>(
string listName,
Func <IQueryable <T>, IQueryable <T> > query = null,
Func <IEnumerable <T>, IEnumerable <T> > sorter = null
)
where T : IEntity
{
var collectionKey = GetCollectionCacheKey(listName);
var result =
IMemoryCacheService.Get <IDynamicCollection <T> >(collectionKey);
if (result != null)
{
return(result);
}
var IRepository = IContainerService.Get <IRepository <T> >();
var idsKey = GetIdsCacheKey(listName);
var entityIds = await ICacheService.GetAsync <List <string> >(idsKey);
if (entityIds == null)
{
var queryable = IRepository.GetQueryable();
if (query != null)
{
queryable = query(queryable);
}
var entities = await IDatabaseService.QueryAsync(queryable);
await IEntityCacheService.Push(entities);
entityIds =
entities
.Select(x => x?.Id)
.ToList();
}
else
{
await IRepository.GetManyByIdAsync(entityIds);
}
result =
IDynamicCollectionFactory
.Create(entityIds, sorter);
IMemoryCacheService.Set(collectionKey, result);
return(result);
}
/// <summary>
/// Get entities from cache, if cache is empty get from database.
/// </summary>
/// <returns>The requested entities.</returns>
public IEnumerable <T> GetAll()
{
var entities = _cacheService.Get(_key);
if (entities == null)
{
CacheItemPolicy policy;
entities = LoadEntities(out policy);
_cacheService.Set(_key, entities, policy);
}
return(entities);
}
public override async Task <T> GetAsync <T>(
string key,
Func <T> factory = null,
CacheOptions <T> options = null
)
{
var cacheObj =
_UseCacheAside
? IMemoryCacheService.Get <T>(key)
: default(T);
if (cacheObj is NotFound)
{
return(default(T));
}
var result = cacheObj == null ? default(T) : cacheObj;
if (result != null)
{
return(result);
}
result = await IRedisGatewayService.GetAsync <T>(key);
if (result == null)
{
if (factory != null)
{
result = factory();
}
}
if (result == null)
{
IMemoryCacheService.Set(key, NotFound.Shared);
return(default(T));
}
if (_UseCacheAside)
{
IMemoryCacheService.Set(key, result, options);
}
await IRedisGatewayService.SetAsync(key, result);
return(result);
}