protected virtual void GetExpiration_Should_Succeed()
{
var cacheKey = $"{_nameSpace}{Guid.NewGuid().ToString()}";
var cacheValue1 = "value1";
_provider.Set(cacheKey, cacheValue1, _defaultTs);
var ts = _provider.GetExpiration(cacheKey);
Assert.InRange(ts, TimeSpan.FromSeconds(1), TimeSpan.FromSeconds(30 + 120));
}
public TimeSpan GetExpiration(string cacheKey)
{
var ts = _localCache.GetExpiration(cacheKey);
if (ts > TimeSpan.Zero)
{
return(ts);
}
try
{
ts = _distributedCache.GetExpiration(cacheKey);
}
catch (Exception ex)
{
_logger?.LogError(ex, "Error getting expiration for cache key = '{0}'.", cacheKey);
return(TimeSpan.Zero);
}
return(ts);
}
public void GetExpiration_LocalExpirationEqualsZero_ReturnsDistributedExpiration()
{
var(hybridProvider, fakeLocalProvider, fakeDistributedProvider) = CreateFakeHybridProvider();
var localExpiration = TimeSpan.Zero;
var distributeExpiration = TimeSpan.FromMinutes(5);
var cacheKey = GetUniqueCacheKey();
A.CallTo(() => fakeLocalProvider.GetExpiration(cacheKey)).Returns(localExpiration);
A.CallTo(() => fakeDistributedProvider.GetExpiration(cacheKey)).Returns(distributeExpiration);
var ts = hybridProvider.GetExpiration(cacheKey);
Assert.Equal(ts, distributeExpiration);
}
/// <summary>
/// Get the specified cacheKey.
/// </summary>
/// <returns>The get.</returns>
/// <param name="cacheKey">Cache key.</param>
/// <typeparam name="T">The 1st type parameter.</typeparam>
public CacheValue <T> Get <T>(string cacheKey)
{
ArgumentCheck.NotNullOrWhiteSpace(cacheKey, nameof(cacheKey));
var cacheValue = _localCache.Get <T>(cacheKey);
if (cacheValue.HasValue)
{
return(cacheValue);
}
LogMessage($"local cache can not get the value of {cacheKey}");
// Circuit Breaker may be more better
try
{
cacheValue = _distributedCache.Get <T>(cacheKey);
}
catch (Exception ex)
{
LogMessage($"distributed cache get error, [{cacheKey}]", ex);
}
if (cacheValue.HasValue)
{
TimeSpan ts = TimeSpan.Zero;
try
{
ts = _distributedCache.GetExpiration(cacheKey);
}
catch
{
}
if (ts <= TimeSpan.Zero)
{
ts = TimeSpan.FromSeconds(_options.DefaultExpirationForTtlFailed);
}
_localCache.Set(cacheKey, cacheValue.Value, ts);
return(cacheValue);
}
LogMessage($"distributed cache can not get the value of {cacheKey}");
return(CacheValue <T> .NoValue);
}
/// <summary>
/// Get the specified cacheKey.
/// </summary>
/// <returns>The get.</returns>
/// <param name="cacheKey">Cache key.</param>
/// <typeparam name="T">The 1st type parameter.</typeparam>
public CacheValue <T> Get <T>(string cacheKey)
{
ArgumentCheck.NotNullOrWhiteSpace(cacheKey, nameof(cacheKey));
var cacheValue = _localCache.Get <T>(cacheKey);
if (cacheValue.HasValue)
{
return(cacheValue);
}
if (_options.EnableLogging)
{
_logger.LogTrace($"local cache can not get the value of {cacheKey}");
}
cacheValue = _distributedCache.Get <T>(cacheKey);
if (cacheValue.HasValue)
{
TimeSpan ts = TimeSpan.Zero;
try
{
ts = _distributedCache.GetExpiration(cacheKey);
}
catch
{
}
if (ts <= TimeSpan.Zero)
{
ts = TimeSpan.FromSeconds(_options.DefaultExpirationForTtlFailed);
}
_localCache.Set(cacheKey, cacheValue.Value, ts);
return(cacheValue);
}
if (_options.EnableLogging)
{
_logger.LogTrace($"distributed cache can not get the value of {cacheKey}");
}
return(CacheValue <T> .NoValue);
}
private TimeSpan GetExpiration(string cacheKey)
{
TimeSpan ts = TimeSpan.Zero;
try
{
ts = _distributedCache.GetExpiration(cacheKey);
}
catch
{
}
if (ts <= TimeSpan.Zero)
{
ts = TimeSpan.FromSeconds(_options.DefaultExpirationForTtlFailed);
}
return(ts);
}
/// <summary>
/// Gets the exporation of specify cachekey async.
/// </summary>
/// <param name="cacheKey">Cache key.</param>
/// <returns>Expiration in TimeSpan</returns>
public TimeSpan GetExpiration(string cacheKey)
{
return(_easyCachingProvider.GetExpiration(cacheKey));
}