/// <summary>
/// 生成 CachingKey
/// </summary>
/// <param name="context"></param>
/// <param name="cachingAttribute"></param>
/// <returns></returns>
private string GenerateCachingKey(AspectContext context, CachingAttribute cachingAttribute)
{
var cachingKey = string.Empty;
// 获取设置的缓存key
if (cachingAttribute != null)
{
cachingKey = cachingAttribute.Key;
}
// 若未设置，则自动获取缓存key
if (string.IsNullOrWhiteSpace(cachingKey))
{
string typeName = context.ServiceMethod.DeclaringType.Name;
string methodName = context.ServiceMethod.Name;
cachingKey = $"{typeName}{DefaultCachingKeyGenerater.SPLIT_CHAR}{methodName}";
}
var cachingKeyGenerater = context.ServiceProvider.GetService(typeof(ICachingKeyGenerater)) as ICachingKeyGenerater;
IList <string> methodArguments = cachingKeyGenerater.FormatArguments(context.Parameters);
cachingKey = cachingKeyGenerater.GenerateCachingKey(cachingKey, methodArguments);
return(cachingKey);
}
private async Task DoCaching(
AspectContext context,
AspectDelegate next,
CachingAttribute cachingAttribute
)
{
var cacheProvider = context.ServiceProvider.GetService(typeof(ICachingProvider)) as ICachingProvider;
var cachingKey = GenerateCachingKey(context, cachingAttribute);
object cacheValue = await cacheProvider.GetAsync <object>(cachingKey);
if (cacheValue != null)// 若读取到缓存就直接返回，否则设置缓存
{
if (context.IsAsync())
{
PropertyInfo propertyInfo = context.ServiceMethod.ReturnType.GetMember("Result")[0] as PropertyInfo;
dynamic returnValue = JsonConvert.DeserializeObject(cacheValue.ToString(), propertyInfo.PropertyType);
context.ReturnValue = Task.FromResult(returnValue);
}
else
{
context.ReturnValue = JsonConvert.DeserializeObject(cacheValue.ToString(), context.ServiceMethod.ReturnType);
}
}
else
{
await next(context);
// 设置缓存
if (!string.IsNullOrWhiteSpace(cachingKey))
{
object returnValue = null;
if (context.IsAsync())
{
returnValue = await context.UnwrapAsyncReturnValue();
}
else
{
returnValue = context.ReturnValue;
}
await cacheProvider.SetAsync(
cachingKey,
returnValue,
TimeSpan.FromSeconds(cachingAttribute.Expiration)
);
}
}
}
/// <summary>
/// 生成 CachingKey
/// </summary>
/// <param name="context"></param>
/// <param name="cachingAttribute"></param>
/// <returns></returns>
private string GenerateCachingKey(AspectContext context, CachingAttribute cachingAttribute)
{
var cachingKey = string.Empty;
// 获取设置的缓存key
if (cachingAttribute != null)
{
cachingKey = cachingAttribute.Key;
}
// 若未设置，则自动获取缓存key
if (string.IsNullOrWhiteSpace(cachingKey))
{
string typeName = context.ServiceMethod.DeclaringType.Name;
string methodName = context.ServiceMethod.Name;
IList <string> methodArguments = FormatArguments(context.Parameters);
cachingKey = GenerateCachingKey(typeName, methodName, methodArguments);
}
return(cachingKey);
}
