MemcachedClient.Remove fails to remove items from cache

[Gonyoda]

EnyimMemcachedCore v2.1.8

ExecuteRemoveAsync doesn't hash the key before determine the pool node. Therefore, the remove always fails.

public async Task<IRemoveOperationResult> ExecuteRemoveAsync(string key)
    {
      IMemcachedNode memcachedNode = this.pool.Locate(key);

should be:

public async Task<IRemoveOperationResult> ExecuteRemoveAsync(string key)
    {
      string hashedKey = this.keyTransformer.Transform(key); 
      IMemcachedNode memcachedNode = this.pool.Locate(hashedKey );

And similar for the non-async version. And, hashedKey needs to be passed to OperationFactory.Delete later in the method(s).

The key is hashed in the PerformStoreAsync and PerformTryGet.

I'd make a PR to help out, but I'm not sure which branch to work off.

[cnblogs-dudu]

From master branch.

[Gonyoda]

A work-around is to store a reference to the KeyTransformer used in the MemcachedClientConfiguration and transforming the key prior to calling Remove:

_keyTransformer = new TigerHashKeyTransformer();
...
configuration.KeyTransformer = _keyTransformer;
IDistributedCache _distributedCache = new MemCacheClient(..., configuration);
...
_distributedCache.RemoveAsync(_keyTransformer.Transform(key));

I'm not sure how to work-around using DI...

[Gonyoda]

Fixed in nuget release 2.1.19