Cache Wrapper with expressions

Question

I dont know if is possible.

I want a class to encapsulate all Cache of my site. I thinking about the best way to do this to avoid conflict with keys.

My first idea is something like this:

    public static TResult Cachear<TResult>(this Cache cache, Expression<Func<TResult>> funcao)
    {
        string chave = funcao.ToString();

        if (!(cache[chave] is TResult))
        {
            cache[chave] = funcao.Compile()();
        }

        return (TResult)cache[chave];
    }

Is the best way? Ty

Answer 1

Expression.ToString() is rather expensive.

The other problem is that Expression's are always freshly created objects, so they will never have the same reference, so using that as a key is problematic.

One last issue (that does not affect you (yet)), is considering all possible parameter combination's.

The only thing I can suggest is to forget about Expression's, and just use Func<R> directly.