public override bool DeleteValue(RedisId key)
{
// get all the keys to be deleted
IEnumerable <RedisId> keys = GetKey <object>(key);
Dictionary <string, List <string> > hashsetDictionary = new Dictionary <string, List <string> >();
// sort the keys by hashset (there should only be 1, but this is more safe)
foreach (RedisId currentKey in keys)
{
if (!hashsetDictionary.Keys.Contains(currentKey.HashSetIdentifier))
{
hashsetDictionary.Add(currentKey.HashSetIdentifier, new List <string>());
}
hashsetDictionary[currentKey.HashSetIdentifier].Add(currentKey.ObjectIdentifier);
}
long deleteCount = 0;
// delete keys by hashset (still there should only be one)
foreach (string hashsetDictionaryKey in hashsetDictionary.Keys)
{
deleteCount += RedisService.Database.HashDelete(hashsetDictionaryKey,
hashsetDictionary[hashsetDictionaryKey].Select(x => (RedisValue)x).ToArray());
}
return(deleteCount > 0);
}
public override bool ContainsKey(RedisId key)
{
HashEntry value = RedisService.Database.HashScan(key.HashSetIdentifier, key.ObjectIdentifier
, RedisService.CacheSettings.ServiceSettings.DefaultScanPageSize).FirstOrDefault();
return(!string.IsNullOrWhiteSpace(value.Name));
}
protected void HardAddToCache(RedisId key, RedisValue value, DateTime expiration)
{
RedisValue realValue = RedisService.CacheSettings.ServiceSettings.CompressValues
? (RedisValue)RedisService.CacheProvider.CompressValue(value)
: value;
ServiceAdd(key, realValue, expiration);
}
public override bool ContainsKey(RedisId key)
{
if (key == null)
{
return(false);
}
return(RedisService.Database.KeyExists(key.FullKey));
}
protected RedisValue HardGetFromCache(RedisId key)
{
RedisValue rawValue = ServiceGet(key);
RedisValue value = (rawValue != default(RedisValue)) && RedisService.CacheSettings.ServiceSettings.CompressValues
? RedisService.CacheProvider.DecompressValue(rawValue)
: rawValue;
return(value);
}
public override bool DeleteValue(RedisId key)
{
if (string.IsNullOrWhiteSpace(key?.FullKey))
{
return(false);
}
IEnumerable <RedisKey> keys = GetKey <object>(key).Select(x => (RedisKey)x.FullKey);
return(RedisService.Database.KeyDelete(keys.ToArray()) > 0);
}
/// <summary>
/// Wraps an object for caching
/// </summary>
/// <typeparam name="T">The configuration type</typeparam>
/// <param name="key">The key that identifies the object</param>
/// <param name="value">The object to wrap</param>
/// <param name="cachedTime">When the object was cached, default UTC now</param>
/// <param name="expireTime">When the object should expire, default UTC now + DefaultCacheLifespan</param>
/// <returns>The wrapped object</returns>
protected virtual RedisCachedObject <T> CreateCachedObject <T>(RedisId key, T value, DateTime?cachedTime = null, DateTime?expireTime = null)
{
return(new RedisCachedObject <T>(key)
{
Value = value,
CachedTime = cachedTime ?? DateTime.UtcNow,
ExpireTime = expireTime ?? DateTime.UtcNow.Add(DefaultCacheLifespan),
Metadata = _cacheInfo
});
}
public virtual RedisCachedObject <T> CreateCachedValue <T>(RedisId redisKey = null)
{
return(new RedisCachedObject <T>(redisKey?.ObjectIdentifier)
{
RetrievedSuccesfully = false,
Value = default(T),
CachedTime = DateTime.MinValue,
Status = CacheEntryStatus.Error,
Metadata = CacheSettings.ServiceSettings.ProviderInfo,
Id = redisKey,
ExpireTime = DateTime.MinValue,
});
}
// not too slow, but could be problematic
public override Dictionary <RedisId, TimeSpan?> GetTimeToLive <T>(IEnumerable <RedisId> allKeys)
{
IEnumerable <RedisId> keys = allKeys.Where(x => !string.IsNullOrWhiteSpace(x?.FullKey));
// Lua uses 1-based arrays
// Redis has the global "Table" (basically an array with generic indexing) KEYS for key arguments
// https://www.lua.org/pil/2.5.html
string luaScript = @"
local keys = KEYS
local retVal = ''
local splitString = '|||||'
local splitKvp = '^^^^^'
local result = {}
for i=1,#keys,1 do
local ttlthing = redis.call('ttl', keys[i])
retVal = (retVal) .. (keys[i]) .. (splitKvp) .. ttlthing .. (splitString)
end
return retVal" ; // retVal = (retVal) .. (splitString) // .. (keys[i])
RedisKey[] redisValues = keys.Select(x => (RedisKey)x.FullKey).ToArray();
RedisResult result = RedisService.Database.ScriptEvaluate(luaScript, redisValues);
string[] splitResult = result.ToString()
.Split(new[] { "|||||" }, StringSplitOptions.RemoveEmptyEntries);
Dictionary <RedisId, TimeSpan?> ttls = new Dictionary <RedisId, TimeSpan?>();
foreach (string s in splitResult)
{
if (string.IsNullOrWhiteSpace(s))
{
continue;
}
string[] splitResult2 = s
.Split(new[] { "^^^^^" }, StringSplitOptions.RemoveEmptyEntries);
if (splitResult2.Length != 2)
{
continue;
}
RedisId key = keys.FirstOrDefault(k => k.FullKey.Contains(s));
int ttlSeconds;
bool gotTtlSeconds = int.TryParse(splitResult2[1], out ttlSeconds);
if (!gotTtlSeconds)
{
ttls.Add(key, null);
}
ttls.Add(key, TimeSpan.FromSeconds(ttlSeconds));
}
return(ttls);
}
public override IEnumerable <RedisId> GetKey <T>(RedisId key)
{
if (!(key?.HasFullKey ?? false))
{
return(new List <RedisId>());
}
IEnumerable <HashEntry> fieldIdentifiers = RedisService.Database.HashScan(key.HashSetIdentifier, key.ObjectIdentifier,
RedisService.CacheSettings.ServiceSettings.DefaultScanPageSize);
IEnumerable <RedisId> resultingKeys =
// get the name, and add it to the hash name
fieldIdentifiers.Select(fi => new RedisId {
HashSetIdentifier = key.HashSetIdentifier, ObjectIdentifier = fi.Name.ToString(), ServiceType = this.ServiceType
});
return(resultingKeys);
}
/// <summary>
/// Converts a string found in cache to an object
/// </summary>
/// <typeparam name="T">Object type to convert to</typeparam>
/// <param name="stringToConvert">String to convert to an object</param>
/// <param name="key">The key that was used to get the value</param>
/// <param name="serializationSettings">The datacontract resolver to use for serialization
/// (polymorphic dtos)</param>
/// <returns>Object from string</returns>
protected internal virtual T ConvertString <T>(string stringToConvert, RedisId key,
ISerializationSettings serializationSettings = null)
{
T retVal = default(T);
if (string.IsNullOrWhiteSpace(stringToConvert))
{
return(retVal);
}
if (typeof(T) == typeof(string))
{
retVal = (T)Convert.ChangeType(stringToConvert, typeof(T));
}
else
{
ISerializationService serializationService = GetSerializationService <T>();
retVal = serializationService.DeserializeObject <T>(stringToConvert, _cacheSettings.SerializationSettings);
}
return(retVal);
}
protected override void ServiceAdd(RedisId key, RedisValue value, DateTime expiration)
{
RedisService.Database.HashSet(key.HashSetIdentifier, key.ObjectIdentifier, value);
}
public virtual IEnumerable <RedisCachedObject <T> > GetValue <T>(RedisId key)
{
return(GetValues <T>(new[] { key }));
}
public virtual Dictionary <RedisId, TimeSpan?> GetTimeToLive <T>(RedisId key)
{
return(GetTimeToLive <T>(new[] { key }));
}
public abstract IEnumerable <RedisId> GetKey <T>(RedisId key);
public abstract bool DeleteValue(RedisId key);
public bool ContainsKey(RedisId key)
{
return(GetRedisServiceImplementation().ContainsKey(key));
}
public override IEnumerable <RedisId> GetKey <T>(RedisId key)
{
return(GetKeys <T>(new[] { key }));
}
protected abstract void ServiceAdd(RedisId key, RedisValue value, DateTime expiration);
public virtual IEnumerable <RedisId> GetKey <T>(RedisId key)
{
return(GetRedisServiceImplementation().GetKey <T>(key));
}
public virtual IEnumerable <RedisCachedObject <T> > GetValue <T>(RedisId key)
{
return(GetRedisServiceImplementation().GetValue <T>(key));
}
protected override RedisValue ServiceGet(RedisId key)
{
return(RedisService.Database.StringGet(key.FullKey));
}
public virtual RedisId GetRedisId(RedisId key)
{
return(key);
}
public virtual bool DeleteValue(RedisId key)
{
return(GetRedisServiceImplementation().DeleteValue(key));
}
protected override RedisValue ServiceGet(RedisId key)
{
return(RedisService.Database.HashGet(key.HashSetIdentifier, key.ObjectIdentifier));
}
protected abstract RedisValue ServiceGet(RedisId key);
public abstract bool ContainsKey(RedisId key);
protected override void ServiceAdd(RedisId key, RedisValue value, DateTime expiration)
{
RedisService.Database.StringSet(key.FullKey, value, expiration - DateTime.UtcNow);
}
public virtual Dictionary <RedisId, TimeSpan?> GetTimeToLive <T>(RedisId key)
{
return(GetRedisServiceImplementation().GetTimeToLive <T>(key));
}