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//
// System.Web.UI.SqlCacheDependency
//
// Authors:
// Marek Habersack (mhabersack@novell.com)
//
// Copyright (C) 2008 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.Collections.Generic;
using System.Security.Permissions;
using System.Data.SqlClient;
using System.Web;
namespace System.Web.Caching
{
[AspNetHostingPermissionAttribute (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
public sealed class SqlCacheDependency: CacheDependency
{
string uniqueId = Guid.NewGuid().ToString();
[MonoTODO ("What to do with the sqlCmd?")]
public SqlCacheDependency (SqlCommand sqlCmd)
{
if (sqlCmd == null)
throw new ArgumentNullException ("sqlCmd");
}
[MonoTODO ("What are the params good for?")]
public SqlCacheDependency (string databaseEntryName, string tableName)
{
if (databaseEntryName == null)
throw new ArgumentNullException ("databaseEntryName");
if (tableName == null)
throw new ArgumentNullException ("tableName");
}
#if NET_4_0
[MonoTODO ("Needs more testing - especially the return value and database+table lookup.")]
public static CacheDependency CreateOutputCacheDependency (string dependency)
{
if (dependency == null)
throw new HttpException (InvalidDependencyFormatMessage (dependency));
if (dependency.Length == 0)
throw new ArgumentException (InvalidDependencyFormatMessage (dependency), "dependency");
int colon;
string[] pairs = dependency.Split (';');
var dependencies = new List <SqlCacheDependency> ();
foreach (string pair in pairs) {
colon = pair.IndexOf (':');
if (colon == -1)
throw new ArgumentException (InvalidDependencyFormatMessage (dependency), "dependency");
dependencies.Add (new SqlCacheDependency (pair.Substring (0, colon), pair.Substring (colon + 1)));
}
switch (dependencies.Count) {
case 0:
return null;
case 1:
return dependencies [0];
default:
var acd = new AggregateCacheDependency ();
acd.Add (dependencies.ToArray ());
return acd;
}
}
static string InvalidDependencyFormatMessage (string dependency)
{
return String.Format (@"The '' SqlDependency attribute for OutputCache directive is invalid.
For SQL Server 7.0 and SQL Server 2000, the valid format is ""database:tablename"", and table name must conform to the format of regular identifiers in SQL. To specify multiple pairs of values, use the ';' separator between pairs. (To specify ':', '\' or ';', prefix it with the '\' escape character.)
For dependencies that use SQL Server 9.0 notifications, specify the value 'CommandNotification'.", dependency);
}
#endif
protected override void DependencyDispose ()
{
// MSDN doesn't document it as being part of the class, but assembly
// comparison shows that it does exist in this type, so we're just calling
// the base class here
base.DependencyDispose ();
}
public override string GetUniqueID ()
{
return uniqueId;
}
}
}
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