/// <summary>
/// Register a cache item for remote clear/refresh access via controller
/// </summary>
/// <typeparam name="TItem"></typeparam>
/// <param name="getterExpression"></param>
/// <param name="doInitialize"></param>
public void RegisterCacheItem <TItem>(Expression <Func <TItem> > getterExpression, bool doInitialize)
where TItem : class
{
if (getterExpression == null)
{
throw new CacheException("Cache item not registered - received undefined getterExpression");
}
MethodInfo method;
object[] arguments;
LambdaHelper.GetMethodInfoAndArguments(getterExpression, out method, out arguments);
// CacheListAttribute is intentionally not supported, as cacheItemKey vary according to input
// these should be dealt with by using a dedicated cache and clearing this entire dedicated cache
var cacheName = method.GetCustomAttributesData()
.Where(a =>
a.AttributeType.FullName == "PubComp.Caching.AopCaching.CacheAttribute" &&
a.ConstructorArguments.Any() &&
a.ConstructorArguments.First().ArgumentType == typeof(string))
.Select(a => (a.ConstructorArguments.First().Value ?? string.Empty).ToString())
.FirstOrDefault();
var methodType = method.DeclaringType;
if (methodType == null)
{
throw new CacheException("Cache item not registered - invalid getterExpression");
}
if (cacheName == null)
{
cacheName = methodType.FullName;
}
if (string.IsNullOrEmpty(cacheName))
{
throw new CacheException("Cache item not registered - received undefined cacheName");
}
var itemKey = CacheKey.GetKey(getterExpression);
if (string.IsNullOrEmpty(itemKey))
{
throw new CacheException("Cache item not registered - received undefined itemKey");
}
RegisteredCacheNames.GetOrAdd(cacheName, false);
var getter = getterExpression.Compile();
Func <Tuple <string, string>, Func <object>, Func <object> > updateGetter
= (k, o) => getter;
RegisteredCacheItems.AddOrUpdate(
Tuple.Create(cacheName, itemKey), getter, updateGetter);
if (doInitialize)
{
if (!TrySetCacheItem(cacheName, itemKey, getter))
{
throw new CacheException("Cache item not initialized - cache not defined: " + cacheName);
}
}
}
