SqlCacheDepency.. QueryNotification subscription not working - sql-server

Question

public class MemoryCacheHelper
{
private static string _conn = ConfigurationManager.ConnectionStrings["EFMultiPoolDbContext"] != null ?
ConfigurationManager.ConnectionStrings["EFMultiPoolDbContext"].ConnectionString :
ConfigurationManager.ConnectionStrings["EFDbContext"].ConnectionString;
private static Logger _logger = LogManager.GetCurrentClassLogger();
private static int _hourOfExpiry = 8; // ConfigurationHelper.GetValue<int>("Cache:HourExpiry", 8);
//private static SqlDependency dependency;
private static ObjectCache _cache = MemoryCache.Default;
private static WebCaching.Cache _webcache = new WebCaching.Cache();
private ReaderWriterLockSlim _cachelock = null;
public MemoryCacheHelper()
{
_cachelock = new ReaderWriterLockSlim();
EnoughPermission();
}
public void Add(string key, object val)
{
Add(key, val, new CacheItemPolicy()
{
SlidingExpiration = new TimeSpan(_hourOfExpiry, 0, 0)
});
}
public void Add(string key, object val, int seconds)
{
Add(key, val, new CacheItemPolicy()
{
//SlidingExpiration = new TimeSpan(0,0,seconds)
AbsoluteExpiration = new DateTimeOffset(DateTime.Now.AddSeconds(seconds))
});
}
public void Add(string key, object val, int mins, WebCaching.CacheDependency dependency)
{
if (val == null)
return;
//_cachelock.EnterReadLock();
try
{
//if (_cache1.Get(key) != null)
{
_logger.Debug(string.Format("Cache Key: {0} set at {1}", key, DateTime.Now));
_webcache.Insert(key, val, dependency, WebCaching.Cache.NoAbsoluteExpiration, TimeSpan.FromMinutes(mins),
WebCaching.CacheItemPriority.Default, CacheItemRemovedCallback);
//if (key == "productTypes")
// _logger.Debug(string.Format("Cache Key: {0} set at {1}", key, DateTime.Now));
}
}
finally
{
// _cachelock.ExitReadLock();
}
}
public static T CheckOrRequeryWebCache<T>(string key, int mins, string commandText)
{
var cache = new MemoryCacheHelper();
object res = cache.GetWebCacheItem(key);
if (res == null)
{
SqlDependency.Stop(_conn);
SqlDependency.Start(_conn);
using (var con = new SqlConnection(_conn))
{
using (var cmd = new SqlCommand())
{
con.Open();
cmd.Connection = con;
cmd.Notification = null;
SqlDataAdapter da = new SqlDataAdapter(cmd);
cmd.CommandText=#"SET ANSI_NULLS ON;SET ANSI_PADDING ON;SET ANSI_WARNINGS ON;SET CONCAT_NULL_YIELDS_NULL ON;SET QUOTED_IDENTIFIER ON;SET NUMERIC_ROUNDABORT OFF;SET ARITHABORT ON;";
{
cmd.ExecuteNonQuery();
}
cmd.CommandText = commandText;
var ds = new DataSet();
da.Fill(ds);
if (key == "visualIdPLUs")
res = ds.Tables[0].AsEnumerable().Select(x => Convert.ToString(x["ParentPLU"])).ToList();
else
res = ds.Tables[0].AsEnumerable().Select(x => new BlockedGIdDateExchangePLU
{
PLU = Convert.ToString(x["ParentPLU"]),
CanExchangeDate = Convert.ToBoolean(x["CanExchangeDate"]),
CanExchangeGId = Convert.ToBoolean(x["CanExchangeGId"])
}).ToList();
var dependency = new WebCaching.SqlCacheDependency(cmd);
//dependency = new SqlDependency(cmd);
//dependency.OnChange += new OnChangeEventHandler(dependency_OnChange);
cache.Add(key, res, mins, dependency);
}
}
}
return (T)res;
}
private static void dependency_OnChange(object sender, SqlNotificationEventArgs e)
{
}
private bool EnoughPermission()
{
SqlClientPermission perm = new SqlClientPermission(System.Security.Permissions.PermissionState.Unrestricted);
try
{
perm.Demand();
return true;
}
catch (System.Exception)
{
return false;
}
}
}
profiler trace for working sample profiler trace for my main projectAm working on SqlCacheDependency. i need to implement it in my main project
in order to test first , i have created sample MVC project and implemented is working perfectly fine, can see all the QueryNotification events on profiler.
when am trying to run the same code in my main project is not working.. the problem i found out from sql profiler is not all qn events are firing.. starting from susbscription event.
can anyone please suggest what is wrong.. (note: am using same database and sql login for both sample and main project)