public async Task <Block> GetBlockAsync(uint256 blockHash, CancellationToken cancel)
{
string cacheKey = $"{nameof(SmartBlockProvider)}:{nameof(GetBlockAsync)}:{blockHash}";
var cacheOptions = new MemoryCacheEntryOptions
{
Size = 10,
SlidingExpiration = TimeSpan.FromSeconds(4)
};
return(await Cache.AtomicGetOrCreateAsync(
cacheKey,
cacheOptions,
() => InnerBlockProvider.GetBlockAsync(blockHash, cancel)).ConfigureAwait(false));
}
public Task <Block> GetBlockAsync(uint256 blockHash, CancellationToken cancel)
{
lock (Lock)
{
string cacheKey = $"{nameof(SmartBlockProvider):nameof(GetBlockAsync)}:{blockHash}";
if (!Cache.TryGetValue(cacheKey, out Task <Block> getBlockTask))
{
getBlockTask = InnerBlockProvider.GetBlockAsync(blockHash, cancel);
var cacheEntryOptions = new MemoryCacheEntryOptions()
.SetSize(10)
.SetSlidingExpiration(TimeSpan.FromSeconds(4))
.RegisterPostEvictionCallback(callback: EvictionCallback, state: this);
// Save data in cache.
Cache.Set(cacheKey, getBlockTask, cacheEntryOptions);
}
return(getBlockTask);
}
}