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//
// Author(s):
// Marek Habersack <mhabersack@novell.com>
//
// (C) 2010 Novell, Inc (http://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.Diagnostics;
using System.IO;
using System.Text;
using System.Threading;
using System.Xml;
namespace System.Web.Caching
{
enum EDSequenceEntryType
{
Enqueue,
Dequeue,
Disable,
Peek,
Update
}
#if DEBUG
[Serializable]
sealed class EDSequenceEntry
{
public readonly EDSequenceEntryType Type;
public readonly CacheItem Item;
public EDSequenceEntry ()
{}
public EDSequenceEntry (CacheItem item, EDSequenceEntryType type)
{
Type = type;
Item = item;
}
}
#endif
sealed partial class CacheItemPriorityQueue
{
#if DEBUG
Dictionary <Guid, CacheItem> items = new Dictionary <Guid, CacheItem> ();
List <EDSequenceEntry> edSequence = new List <EDSequenceEntry> ();
List <EDSequenceEntry> EDSequence {
get {
if (edSequence == null)
edSequence = new List <EDSequenceEntry> ();
return edSequence;
}
}
#endif
[Conditional ("DEBUG")]
void InitDebugMode ()
{
#if DEBUG
AppDomain.CurrentDomain.DomainUnload += OnDomainUnload;
#endif
}
[Conditional ("DEBUG")]
void AddSequenceEntry (CacheItem item, EDSequenceEntryType type)
{
#if DEBUG
EDSequence.Add (new EDSequenceEntry (CopyItem (item), type));
#endif
}
#if DEBUG
CacheItem CopyItem (CacheItem item)
{
CacheItem newItem = new CacheItem ();
// if (items.TryGetValue (item.Guid, out newItem)) {
// newItem.PriorityQueueIndex = item.PriorityQueueIndex
// }
newItem.Key = item.Key;
newItem.AbsoluteExpiration = item.AbsoluteExpiration;
newItem.SlidingExpiration = item.SlidingExpiration;
newItem.Priority = item.Priority;
newItem.LastChange = item.LastChange;
newItem.ExpiresAt = item.ExpiresAt;
newItem.Disabled = item.Disabled;
newItem.PriorityQueueIndex = item.PriorityQueueIndex;
newItem.Guid = item.Guid;
//items [newItem.Guid] = newItem;
return newItem;
}
string CreateNewCacheItemInstanceCode (string indent, CacheItem item)
{
var sb = new StringBuilder (indent + "new CacheItem {");
sb.AppendFormat ("Key = \"{0}\", ", item.Key.Replace ("\n", "\\n").Replace ("\r", "\\r"));
sb.AppendFormat ("AbsoluteExpiration = DateTime.Parse (\"{0}\"), ", item.AbsoluteExpiration.ToString ());
sb.AppendFormat ("SlidingExpiration = TimeSpan.Parse (\"{0}\"), ", item.SlidingExpiration.ToString ());
sb.AppendFormat ("Priority = CacheItemPriority.{0}, ", item.Priority);
sb.AppendFormat ("LastChange = DateTime.Parse (\"{0}\"), ", item.LastChange.ToString ());
sb.AppendFormat ("ExpiresAt = {0}, ", item.ExpiresAt);
sb.AppendFormat ("Disabled = {0}, ", item.Disabled.ToString ().ToLowerInvariant ());
sb.AppendFormat ("PriorityQueueIndex = {0},", item.PriorityQueueIndex);
sb.AppendFormat ("Guid = new Guid (\"{0}\")}}, \n", item.Guid.ToString ());
return sb.ToString ();
}
#endif
[Conditional ("DEBUG")]
public void OnItemDisable (CacheItem i)
{
#if DEBUG
CacheItem item;
if (!items.TryGetValue (i.Guid, out item))
return;
EDSequence.Add (new EDSequenceEntry (CopyItem (i), EDSequenceEntryType.Disable));
#endif
}
#if DEBUG
void OnDomainUnload (object sender, EventArgs e)
{
if (EDSequence.Count == 0) {
Console.Error.WriteLine ("No enqueue/dequeue sequence recorded.");
return;
}
try {
string filePath = Path.Combine (HttpRuntime.AppDomainAppPath, String.Format ("cache_pq_sequence_{0}_{1:x}.seq",
DateTime.UtcNow.ToString ("yyyy-MM-dd_hh-mm-ss"),
GetHashCode ()));
var settings = new XmlWriterSettings ();
settings.Indent = true;
settings.IndentChars = "\t";
settings.NewLineChars = "\n";
settings.Encoding = Encoding.UTF8;
Console.Error.WriteLine ("Saving sequence in file {0}", filePath);
using (XmlWriter writer = XmlWriter.Create (filePath, settings)) {
writer.WriteStartDocument (true);
writer.WriteStartElement ("sequence");
foreach (EDSequenceEntry entry in EDSequence) {
writer.WriteStartElement ("entry");
writer.WriteAttributeString ("type", entry.Type.ToString ());
if (entry.Item == null)
writer.WriteAttributeString ("isNull", "true");
else {
writer.WriteAttributeString ("key", entry.Item.Key != null ? entry.Item.Key.Replace ("\n", "\\n").Replace ("\r", "\\r") : "null");
writer.WriteAttributeString ("absoluteExpiration", entry.Item.AbsoluteExpiration.Ticks.ToString ());
writer.WriteAttributeString ("slidingExpiration", entry.Item.SlidingExpiration.Ticks.ToString ());
writer.WriteAttributeString ("priority", entry.Item.Priority.ToString ());
writer.WriteAttributeString ("lastChange", entry.Item.LastChange.Ticks.ToString ());
writer.WriteAttributeString ("expiresAt", entry.Item.ExpiresAt.ToString ());
writer.WriteAttributeString ("disabled", entry.Item.Disabled.ToString ());
writer.WriteAttributeString ("guid", entry.Item.Guid.ToString ());
writer.WriteAttributeString ("priorityQueueIndex", entry.Item.PriorityQueueIndex.ToString ());
}
writer.WriteEndElement ();
}
writer.WriteEndElement ();
writer.Flush ();
}
} catch (Exception ex) {
Console.WriteLine ("Failed to write enqueue/dequeue sequence file. Exception was caught:\n{0}",
ex);
}
}
#endif
}
}
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