using cache in mvc application - asp.net-mvc-3

Question

I've a question regarding cache in mvc web application.
I'd like to use cache to store many lists which are used frequently in this way
List<IncotermDTO> incoterm;
string keyIncoterm = "listaIncoterm";
if (!CacheHelper.Get(keyIncoterm, out incoterm))
{
incoterm = BLIncoterm.GetIncoterm(null, null);
CacheHelper.Add(incoterm, keyIncoterm);
}
ViewBag.listaIncoterm = new SelectList(incoterm.OrderBy(x => x.DESCRIPTION), "ID", "DESCRIPTION");
following the tips in this article
http://johnnycoder.com/blog/2008/12/10/c-cache-helper-class/
This is the class helper
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Caching;
namespace GestioneMovimentazioni
{
public static class CacheHelper
{
/// <summary>
/// Insert value into the cache using
/// appropriate name/value pairs
/// </summary>
/// <typeparam name="T">Type of cached item</typeparam>
/// <param name="o">Item to be cached</param>
/// <param name="key">Name of item</param>
public static void Add<T>(T o, string key)
{
// NOTE: Apply expiration parameters as you see fit.
// I typically pull from configuration file.
// In this example, I want an absolute
// timeout so changes will always be reflected
// at that time. Hence, the NoSlidingExpiration.
HttpContext.Current.Cache.Insert(
key,
o,
null,
System.Web.Caching.Cache.NoAbsoluteExpiration,
TimeSpan.FromSeconds(120));
}
/// <summary>
/// Remove item from cache
/// </summary>
/// <param name="key">Name of cached item</param>
public static void Clear(string key)
{
HttpContext.Current.Cache.Remove(key);
}
/// <summary>
/// Check for item in cache
/// </summary>
/// <param name="key">Name of cached item</param>
/// <returns></returns>
public static bool Exists(string key)
{
return HttpContext.Current.Cache[key] != null;
}
/// <summary>
/// Retrieve cached item
/// </summary>
/// <typeparam name="T">Type of cached item</typeparam>
/// <param name="key">Name of cached item</param>
/// <param name="value">Cached value. Default(T) if
/// item doesn't exist.</param>
/// <returns>Cached item as type</returns>
public static bool Get<T>(string key, out T value)
{
try
{
if (!Exists(key))
{
value = default(T);
return false;
}
value = (T)HttpContext.Current.Cache[key];
}
catch
{
value = default(T);
return false;
}
return true;
}
public static T Get<T>(string key) where T : class
{
try
{
return (T)HttpContext.Current.Cache[key];
}
catch
{
return null;
}
}
}
}
This is the question..
This list will be cached for all users of the application or not?
If not, what implementation do you suggest?

Answer 1

HttpContext.Current.Cache is the same for all users. At least as long as you do not use Loadbalancing or Webfarm..