private CacheResultInfo GetCacheResultInfo(MethodInfo method)
{
CacheResultInfo cacheResultInfo = (CacheResultInfo)_cacheResultAttributeCache[method];
// no need for locking here - last one wins
if (cacheResultInfo == null)
{
CacheResultAttribute resultInfo = (CacheResultAttribute)GetCustomAttribute(method, typeof(CacheResultAttribute));
CacheResultItemsAttribute[] itemInfoArray = (CacheResultItemsAttribute[])GetCustomAttributes(method, typeof(CacheResultItemsAttribute));
cacheResultInfo = new CacheResultInfo(resultInfo, itemInfoArray);
_cacheResultAttributeCache[method] = cacheResultInfo;
}
return cacheResultInfo;
}
private CacheResultInfo GetCacheResultInfo(MethodInfo method)
{
CacheResultInfo cacheResultInfo = (CacheResultInfo)_cacheResultAttributeCache[method];
// no need for locking here - last one wins
if (cacheResultInfo == null)
{
CacheResultAttribute resultInfo = (CacheResultAttribute)GetCustomAttribute(method, typeof(CacheResultAttribute));
CacheResultItemsAttribute[] itemInfoArray = (CacheResultItemsAttribute[])GetCustomAttributes(method, typeof(CacheResultItemsAttribute));
cacheResultInfo = new CacheResultInfo(resultInfo, itemInfoArray);
_cacheResultAttributeCache[method] = cacheResultInfo;
}
return(cacheResultInfo);
}
/// <summary>
/// Applies caching around a method invocation.
/// </summary>
/// <remarks>
/// <p>
/// This method tries to retrieve an object from the cache, using the supplied
/// <paramref name="invocation"/> to generate a cache key. If an object is found
/// in the cache, the cached value is returned and the method call does not
/// proceed any further down the invocation chain.
/// </p>
/// <p>
/// If object does not exist in the cache, the advised method is called (using
/// <see cref="AopAlliance.Intercept.IJoinpoint.Proceed()"/>)
/// and any return value is cached for the next method invocation.
/// </p>
/// </remarks>
/// <param name="invocation">
/// The method invocation that is being intercepted.
/// </param>
/// <returns>
/// A cached object or the result of the
/// <see cref="AopAlliance.Intercept.IJoinpoint.Proceed()"/> call.
/// </returns>
/// <exception cref="System.Exception">
/// If any of the interceptors in the chain or the target object itself
/// throws an exception.
/// </exception>
public object Invoke(IMethodInvocation invocation)
{
CacheResultInfo cacheResultInfo = GetCacheResultInfo(invocation.Method);
// prepare variables for SpEL expressions
IDictionary vars = PrepareVariables(invocation.Method, invocation.Arguments);
bool cacheHit = false;
object returnValue = GetReturnValue(invocation, cacheResultInfo.ResultInfo, vars, out cacheHit);
if (!cacheHit && cacheResultInfo.ItemInfoArray.Length > 0 && returnValue is IEnumerable)
{
CacheResultItems((IEnumerable)returnValue, cacheResultInfo.ItemInfoArray, vars);
}
return(returnValue);
}
