/// <summary>
/// Gets an EF query and returns its hashed key to store in the cache.
/// </summary>
/// <param name="command">The EF query.</param>
/// <param name="context">DbContext is a combination of the Unit Of Work and Repository patterns.</param>
/// <param name="cachePolicy">determines the Expiration time of the cache.</param>
/// <returns>Information of the computed key of the input LINQ query.</returns>
public EFCacheKey GetEFCacheKey(DbCommand command, DbContext context, EFCachePolicy cachePolicy)
{
if (command == null)
{
throw new ArgumentNullException(nameof(command));
}
if (cachePolicy == null)
{
throw new ArgumentNullException(nameof(cachePolicy));
}
var cacheKey = getCacheKey(command, cachePolicy.CacheSaltKey);
var cacheKeyHash =
!string.IsNullOrEmpty(_cacheSettings.CacheKeyPrefix) ?
$"{_cacheSettings.CacheKeyPrefix}{XxHashUnsafe.ComputeHash(cacheKey):X}" :
$"{XxHashUnsafe.ComputeHash(cacheKey):X}";
var cacheDependencies = _cacheDependenciesProcessor.GetCacheDependencies(command, context, cachePolicy);
_logger.LogDebug($"KeyHash: {cacheKeyHash}, CacheDependencies: {string.Join(", ", cacheDependencies)}.");
return(new EFCacheKey(cacheDependencies)
{
KeyHash = cacheKeyHash
});
}
/// <summary>
/// Gets an EF query and returns its hashed key to store in the cache.
/// </summary>
/// <param name="command">The EF query.</param>
/// <param name="context">DbContext is a combination of the Unit Of Work and Repository patterns.</param>
/// <param name="cachePolicy">determines the Expiration time of the cache.</param>
/// <returns>Information of the computed key of the input LINQ query.</returns>
public EFCacheKey GetEFCacheKey(DbCommand command, DbContext context, EFCachePolicy cachePolicy)
{
if (command == null)
{
throw new ArgumentNullException(nameof(command));
}
if (cachePolicy == null)
{
throw new ArgumentNullException(nameof(cachePolicy));
}
//put the prefix in both places so the namespace will apply regardless of which key is used for access into the cache
#pragma warning disable S125 // Sections of code should not be commented out
string cacheKey = string.Empty;
var cacheKeyHash = string.Empty;
if (!string.IsNullOrEmpty(_keyPrefix))
{
cacheKey += _keyPrefix;
cacheKeyHash += _keyPrefix;
}
cacheKey += getCacheKey(command, cachePolicy.CacheSaltKey);
cacheKeyHash += $"{XxHashUnsafe.ComputeHash(cacheKey):X}";
var cacheDependencies = _cacheDependenciesProcessor.GetCacheDependencies(command, context, cachePolicy);
_logger.LogDebug($"KeyHash: {cacheKeyHash}, CacheDependencies: {string.Join(", ", cacheDependencies)}.");
return(new EFCacheKey(cacheDependencies)
{
Key = cacheKey,
KeyHash = cacheKeyHash
});
}
/// <summary>
/// Extracts the table names of an SQL command.
/// </summary>
public SortedSet <string> GetSqlCommandTableNames(string commandText)
{
var commandTextKey = $"{XxHashUnsafe.ComputeHash(commandText):X}";
return(_commandTableNames.GetOrAdd(commandTextKey,
_ => new Lazy <SortedSet <string> >(() => getRawSqlCommandTableNames(commandText),
LazyThreadSafetyMode.ExecutionAndPublication)).Value);
}
/// <summary>
/// Gets an EF query and returns its hashed key to store in the cache.
/// </summary>
/// <param name="command">The EF query.</param>
/// <param name="context">DbContext is a combination of the Unit Of Work and Repository patterns.</param>
/// <param name="cachePolicy">determines the Expiration time of the cache.</param>
/// <returns>Information of the computed key of the input LINQ query.</returns>
public EFCacheKey GetEFCacheKey(DbCommand command, DbContext context, EFCachePolicy cachePolicy)
{
var cacheKey = getCacheKey(command, cachePolicy.CacheSaltKey);
var cacheKeyHash = $"{XxHashUnsafe.ComputeHash(cacheKey):X}";
var cacheDependencies = _cacheDependenciesProcessor.GetCacheDependencies(command, context, cachePolicy);
_logger.LogDebug($"KeyHash: {cacheKeyHash}, CacheDependencies: {string.Join(", ", cacheDependencies)}.");
return(new EFCacheKey
{
Key = cacheKey,
KeyHash = cacheKeyHash,
CacheDependencies = cacheDependencies
});
}
