using System;
using System.Reflection;
using System.Collections.Specialized;
using System.Configuration.Provider;
using System.Data;
using System.Web.Caching;
using System.Web;
using System.Web.Configuration;
using System.Configuration;
namespace Commerce.Providers {
public abstract class CatalogProvider : System.Configuration.Provider.ProviderBase
{
static CatalogProvider _instance;
static object padLock;
public static CatalogProvider Instance {
get {
CatalogProvider tempInstance;
if (_instance == null)
padLock = new object();
lock (padLock) {
tempInstance = LoadProvider();
_instance = tempInstance;
}
return _instance;
}
}
static CatalogProvider LoadProvider() {
// Get the names of the providers
// Use the cache because the reflection used later is expensive
Cache cache = System.Web.HttpRuntime.Cache;
string cacheKey = null;
CatalogProvider _instanceLoader;
CatalogProviderConfiguration config = CatalogProviderConfiguration.GetConfig();
cacheKey = "CatalogProvider:: " + config.DefaultProvider;