-// \r
-// System.Web.Caching\r
-//\r
-// Author:\r
-// Patrik Torstensson (Patrik.Torstensson@labs2.com)\r
-//\r
-// (C) Copyright Patrik Torstensson, 2001\r
-//\r
-namespace System.Web.Caching\r
-{\r
- /// <summary>\r
- /// Class to handle cache dependency, right now this class is only a mookup\r
- /// </summary>\r
- public class CacheDependency : System.IDisposable\r
- {\r
- private bool _boolDisposed;\r
-\r
- public CacheDependency() \r
- {\r
- _boolDisposed = false;\r
- }\r
- \r
- public delegate void CacheDependencyCallback(CacheDependency objDependency);\r
- \r
- public event CacheDependencyCallback Changed;\r
-\r
- public void OnChanged()\r
- {\r
- if (_boolDisposed)\r
- {\r
- throw new System.ObjectDisposedException("System.Web.CacheDependency");\r
- }\r
-\r
- if (Changed != null)\r
- {\r
- Changed(this);\r
- }\r
- }\r
-\r
- public bool IsDisposed\r
- {\r
- get \r
- {\r
- return _boolDisposed;\r
- }\r
- }\r
-\r
- public bool HasEvents\r
- {\r
- get \r
- {\r
- if (_boolDisposed)\r
- {\r
- throw new System.ObjectDisposedException("System.Web.CacheDependency");\r
- }\r
-\r
- if (Changed != null)\r
- {\r
- return true;\r
- }\r
-\r
- return false;\r
- }\r
- }\r
-\r
- public void Dispose()\r
- {\r
- _boolDisposed = true;\r
- }\r
-\r
- /// <summary>\r
- /// Used in testing.\r
- /// </summary>\r
- public void Signal()\r
- {\r
- OnChanged();\r
- }\r
- }\r
-}\r
+//
+// System.Web.Caching.CachedDependency
+//
+// Author(s):
+// Lluis Sanchez (lluis@ximian.com)
+//
+// (C) 2005 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.Collections;
+using System.IO;
+using System.Security.Permissions;
+#if NET_2_0
+using System.Text;
+#endif
+
+namespace System.Web.Caching
+{
+#if NET_2_0
+ // CAS
+ [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
+ [AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
+ public class CacheDependency: IDisposable {
+#else
+ // CAS - no InheritanceDemand here as the class is sealed
+ [AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
+ public sealed class CacheDependency: IDisposable {
+#endif
+ string[] cachekeys;
+ CacheDependency dependency;
+ DateTime start;
+ Cache cache;
+ FileSystemWatcher[] watchers;
+ bool hasChanged;
+#if NET_2_0
+ bool used;
+ DateTime utcLastModified;
+#endif
+ object locker = new object ();
+
+#if NET_2_0
+ public CacheDependency (): this (null, null, null, DateTime.Now)
+ {
+ }
+#endif
+
+ public CacheDependency (string filename): this (new string[] { filename }, null, null, DateTime.Now)
+ {
+ }
+
+ public CacheDependency (string[] filenames): this (filenames, null, null, DateTime.Now)
+ {
+ }
+
+ public CacheDependency (string filename, DateTime start): this (new string[] { filename }, null, null, start)
+ {
+ }
+
+ public CacheDependency (string [] filenames, DateTime start)
+ : this (filenames, null, null, start)
+ {
+ }
+
+ public CacheDependency (string[] filenames, string[] cachekeys): this (filenames, cachekeys, null, DateTime.Now)
+ {
+ }
+
+ public CacheDependency (string[] filenames, string[] cachekeys, CacheDependency dependency): this (filenames, cachekeys, dependency, DateTime.Now)
+ {
+ }
+
+ public CacheDependency (string[] filenames, string[] cachekeys, DateTime start): this (filenames, cachekeys, null, start)
+ {
+ }
+
+ public CacheDependency (string[] filenames, string[] cachekeys, CacheDependency dependency, DateTime start)
+ {
+ if (filenames != null) {
+ watchers = new FileSystemWatcher [filenames.Length];
+ for (int n=0; n<filenames.Length; n++) {
+ FileSystemWatcher watcher = new FileSystemWatcher ();
+ if (Directory.Exists (filenames [n])) {
+ watcher.Path = filenames [n];
+ } else {
+ string parentPath = Path.GetDirectoryName (filenames [n]);
+ if (parentPath != null && Directory.Exists (parentPath)) {
+ watcher.Path = parentPath;
+ watcher.Filter = Path.GetFileName (filenames [n]);
+ } else
+ continue;
+ }
+ watcher.NotifyFilter |= NotifyFilters.Size;
+ watcher.Created += new FileSystemEventHandler (OnChanged);
+ watcher.Changed += new FileSystemEventHandler (OnChanged);
+ watcher.Deleted += new FileSystemEventHandler (OnChanged);
+ watcher.Renamed += new RenamedEventHandler (OnChanged);
+ watcher.EnableRaisingEvents = true;
+ watchers [n] = watcher;
+ }
+ }
+ this.cachekeys = cachekeys;
+ this.dependency = dependency;
+ if (dependency != null)
+ dependency.DependencyChanged += new EventHandler (OnChildDependencyChanged);
+ this.start = start;
+
+#if NET_2_0
+ FinishInit ();
+#endif
+ }
+
+#if NET_2_0
+ public virtual string GetUniqueID ()
+ {
+ StringBuilder sb = new StringBuilder ();
+ lock (locker) {
+ if (watchers != null)
+ foreach (FileSystemWatcher fsw in watchers)
+ if (fsw != null && fsw.Path != null && fsw.Path.Length != 0)
+ sb.AppendFormat ("_{0}", fsw.Path);
+ }
+
+ if (cachekeys != null)
+ foreach (string key in cachekeys)
+ sb.AppendFormat ("_{0}", key);
+ return sb.ToString ();
+ }
+#endif
+
+ void OnChanged (object sender, FileSystemEventArgs args)
+ {
+ OnDependencyChanged (sender, args);
+ }
+
+ bool DoOnChanged ()
+ {
+ if (DateTime.Now < start)
+ return false;
+ hasChanged = true;
+#if NET_2_0
+ utcLastModified = DateTime.UtcNow;
+#endif
+ DisposeWatchers ();
+
+ if (cache != null)
+ cache.CheckExpiration ();
+
+ return true;
+ }
+
+ void DisposeWatchers ()
+ {
+ lock (locker) {
+ if (watchers != null) {
+ foreach (FileSystemWatcher w in watchers)
+ if (w != null)
+ w.Dispose ();
+ }
+ watchers = null;
+ }
+ }
+
+ public void Dispose ()
+ {
+ DependencyDispose ();
+ }
+
+#if NET_2_0
+ internal virtual void DependencyDisposeInternal ()
+ {
+ }
+#endif
+
+#if NET_2_0
+ protected virtual
+#endif
+ void DependencyDispose ()
+ {
+#if NET_2_0
+ DependencyDisposeInternal ();
+#endif
+ DisposeWatchers ();
+ if (dependency != null)
+ dependency.DependencyChanged -= new EventHandler (OnChildDependencyChanged);
+ cache = null;
+ }
+
+ internal void SetCache (Cache c)
+ {
+ cache = c;
+#if NET_2_0
+ used = c != null;
+#endif
+ }
+
+#if NET_2_0
+ protected internal void FinishInit ()
+ {
+ utcLastModified = DateTime.UtcNow;
+ }
+
+ internal bool IsUsed {
+ get { return used; }
+ }
+
+ internal DateTime Start {
+ get { return start; }
+ set { start = value; }
+ }
+
+ public DateTime UtcLastModified {
+ get {
+ return utcLastModified;
+ }
+ }
+
+ protected void SetUtcLastModified (DateTime utcLastModified)
+ {
+ this.utcLastModified = utcLastModified;
+ }
+#endif
+
+ public bool HasChanged {
+ get {
+ if (hasChanged)
+ return true;
+
+ if (DateTime.Now < start)
+ return false;
+
+ if (cache != null && cachekeys != null) {
+ foreach (string key in cachekeys) {
+ if (cache.GetKeyLastChange (key) > start) {
+ hasChanged = true;
+ break;
+ }
+ }
+ }
+ if (hasChanged)
+ DisposeWatchers ();
+
+ return hasChanged;
+ }
+ }
+
+ void OnChildDependencyChanged (object o, EventArgs e)
+ {
+ hasChanged = true;
+ OnDependencyChanged (o, e);
+ }
+
+ void OnDependencyChanged (object sender, EventArgs e)
+ {
+ if (!DoOnChanged ())
+ return;
+
+ if (DependencyChanged == null)
+ return;
+
+ foreach (EventHandler eh in DependencyChanged.GetInvocationList ())
+ eh (sender, e);
+ }
+
+#if NET_2_0
+ protected
+#else
+ internal
+#endif
+ void NotifyDependencyChanged (object sender, EventArgs e)
+ {
+ OnDependencyChanged (sender, e);
+ }
+
+ internal event EventHandler DependencyChanged;
+ }
+}
projects / mono.git / blobdiff