//
// System.Web.HttpApplicationFactory
//
+// TODO:
+// bin_watcher must work.
+//
+//
// Author:
-// Patrik Torstensson (ptorsten@hotmail.com)
// Gonzalo Paniagua Javier (gonzalo@ximian.com)
//
// (c) 2002,2003 Ximian, Inc. (http://www.ximian.com)
// (c) Copyright 2004 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
using System.IO;
using System.Reflection;
using System.Web.UI;
-using System.Web.Compilation;
using System.Web.SessionState;
+using System.Web.Configuration;
+
+#if !TARGET_J2EE
+using System.Web.Compilation;
+#else
+using vmw.common;
+#endif
namespace System.Web {
class HttpApplicationFactory {
- private string _appFilename;
- private Type _appType;
+ // Initialized in InitType
+#if TARGET_J2EE
+ static HttpApplicationFactory theFactory {
+ get
+ {
+ HttpApplicationFactory factory = (HttpApplicationFactory)AppDomain.CurrentDomain.GetData("HttpApplicationFactory");
+ if (factory == null) {
+ lock(typeof(HttpApplicationFactory)) {
+ factory = (HttpApplicationFactory)AppDomain.CurrentDomain.GetData("HttpApplicationFactory");
+ if (factory == null) {
+ factory = new HttpApplicationFactory();
+ System.Threading.Thread.Sleep(1);
+ AppDomain.CurrentDomain.SetData("HttpApplicationFactory", factory);
+ }
+ }
+ }
+ return factory;
+ }
+ }
+#else
+ static HttpApplicationFactory theFactory = new HttpApplicationFactory();
+#endif
+
+ bool needs_init = true;
+ Type app_type;
+ HttpApplicationState app_state;
+#if !TARGET_JVM
+ FileSystemWatcher app_file_watcher;
+ FileSystemWatcher bin_watcher;
+#endif
+ Stack available = new Stack ();
+
+ // Watch this thing out when getting an instance
+ IHttpHandler custom_application;
+
+ bool IsEventHandler (MethodInfo m)
+ {
+ if (m.ReturnType != typeof (void))
+ return false;
+
+ ParameterInfo [] pi = m.GetParameters ();
+ int length = pi.Length;
+ if (length == 0)
+ return true;
+
+ if (length != 2)
+ return false;
+
+ if (pi [0].ParameterType != typeof (object) ||
+ pi [1].ParameterType != typeof (EventArgs))
+ return false;
+
+ return true;
+ }
- private bool _appInitialized;
- private bool _appFiredEnd;
+ void AddEvent (MethodInfo method, Hashtable appTypeEventHandlers)
+ {
+ string name = method.Name.Replace ("_On", "_");
+ if (appTypeEventHandlers [name] == null) {
+ appTypeEventHandlers [name] = method;
+ return;
+ }
- private Stack _appFreePublicList;
- private int _appFreePublicInstances;
+ MethodInfo old_method = appTypeEventHandlers [name] as MethodInfo;
+ ArrayList list;
+ if (old_method != null){
+ list = new ArrayList (4);
+ list.Add (old_method);
+ appTypeEventHandlers [name] = list;
+ } else
+ list = appTypeEventHandlers [name] as ArrayList;
- FileSystemWatcher appFileWatcher;
- FileSystemWatcher binWatcher;
+ list.Add (method);
+ }
- static private int _appMaxFreePublicInstances = 32;
-
- private HttpApplicationState _state;\r
-\r
- static IHttpHandler custApplication;\r
-\r
- static private HttpApplicationFactory s_Factory = new HttpApplicationFactory();\r
-\r
- public HttpApplicationFactory() {\r
- _appInitialized = false;\r
- _appFiredEnd = false;\r
-\r
- _appFreePublicList = new Stack();\r
- _appFreePublicInstances = 0;\r
- }\r
-\r
- static private string GetAppFilename (HttpContext context)\r
- {\r
- string physicalAppPath = context.Request.PhysicalApplicationPath;\r
- string appFilePath = Path.Combine (physicalAppPath, "Global.asax");\r
- if (File.Exists (appFilePath))\r
- return appFilePath;\r
-\r
- return Path.Combine (physicalAppPath, "global.asax");\r
- }\r
-
- void CompileApp (HttpContext context)
+ Hashtable GetApplicationTypeEvents (HttpApplication app)
{
- if (File.Exists (_appFilename)) {
- _appType = ApplicationFileParser.GetCompiledApplicationType (_appFilename, context);
- if (_appType == null) {
- string msg = String.Format ("Error compiling application file ({0}).", _appFilename);
- throw new ApplicationException (msg);
- }
+ Type appType = app.GetType ();
+ Hashtable appTypeEventHandlers = new Hashtable ();
+ BindingFlags flags = BindingFlags.Public |
+ BindingFlags.NonPublic |
+ BindingFlags.Instance |
+ BindingFlags.Static;
- appFileWatcher = CreateWatcher (_appFilename, new FileSystemEventHandler (OnAppFileChanged));
- } else {
- _appType = typeof (System.Web.HttpApplication);
- _state = new HttpApplicationState ();
+ MethodInfo [] methods = appType.GetMethods (flags);
+ foreach (MethodInfo m in methods) {
+ if (IsEventHandler (m))
+ AddEvent (m, appTypeEventHandlers);
}
+
+ return appTypeEventHandlers;
}
- static bool IsEventHandler (MethodInfo m)\r
- {\r
- if (m.ReturnType != typeof (void))\r
- return false;\r
-\r
- ParameterInfo [] pi = m.GetParameters ();\r
- int length = pi.Length;\r
- if (length == 0)\r
- return true;\r
-\r
- if (length != 2)\r
- return false;\r
-\r
- if (pi [0].ParameterType != typeof (object) ||\r
- pi [1].ParameterType != typeof (EventArgs))\r
- return false;\r
- \r
- return true;\r
- }\r
-\r
- static void AddEvent (MethodInfo method, Hashtable appTypeEventHandlers)\r
- {\r
- string name = method.Name.Replace ("_On", "_");\r
- if (appTypeEventHandlers [name] == null) {\r
- appTypeEventHandlers [name] = method;\r
- return;\r
- }\r
- \r
- ArrayList list;\r
- if (appTypeEventHandlers [name] is MethodInfo)\r
- list = new ArrayList ();\r
- else\r
- list = appTypeEventHandlers [name] as ArrayList;\r
-\r
- list.Add (method);\r
- }\r
- \r
- static Hashtable GetApplicationTypeEvents (HttpApplication app)\r
- {\r
- Type appType = app.GetType ();\r
- Hashtable appTypeEventHandlers = new Hashtable ();\r
- BindingFlags flags = BindingFlags.Public |\r
- BindingFlags.NonPublic | \r
- BindingFlags.Instance |\r
- BindingFlags.Static;\r
-\r
- MethodInfo [] methods = appType.GetMethods (flags);\r
- foreach (MethodInfo m in methods) {\r
- if (IsEventHandler (m))\r
- AddEvent (m, appTypeEventHandlers);\r
- }\r
-\r
- return appTypeEventHandlers;\r
- }\r
-
- static bool FireEvent (string method_name, object target, object [] args)
+ bool FireEvent (string method_name, object target, object [] args)
{
Hashtable possibleEvents = GetApplicationTypeEvents ((HttpApplication) target);
MethodInfo method = possibleEvents [method_name] as MethodInfo;
if (method.GetParameters ().Length == 0)
args = null;
- try {
- method.Invoke (target, args);
- } catch {
- // Ignore any exception here
- }
+ method.Invoke (target, args);
+
return true;
}
- internal static void FireOnAppStart (HttpApplication app)\r
+ void FireOnAppStart (HttpContext context)
{
- object [] args = new object [] {app, EventArgs.Empty};\r
- FireEvent ("Application_Start", app, args);\r
+ HttpApplication app = (HttpApplication) Activator.CreateInstance (app_type, true);
+ app.SetContext (context);
+ object [] args = new object [] {app, EventArgs.Empty};
+ FireEvent ("Application_Start", app, args);
+ Recycle (app);
}
void FireOnAppEnd ()
{
- if (_appType == null)
+ if (app_type == null)
return; // we didn't even get an application
- HttpApplication app = (HttpApplication) HttpRuntime.CreateInternalObject (_appType);
- AttachEvents (app);
- FireEvent ("Application_End", app, new object [] {this, EventArgs.Empty});
+ HttpApplication app = (HttpApplication) Activator.CreateInstance (app_type, true);
+ FireEvent ("Application_End", app, new object [] {new object (), EventArgs.Empty});
app.Dispose ();
}
+ //
+ // This is invoked by HttpRuntime.Dispose, when we unload an AppDomain
+ // To reproduce this in action, touch "global.asax" while XSP is running.
+ //
+ public static void Dispose ()
+ {
+ theFactory.FireOnAppEnd ();
+ }
+
+#if !TARGET_JVM
FileSystemWatcher CreateWatcher (string file, FileSystemEventHandler hnd)
{
FileSystemWatcher watcher = new FileSystemWatcher ();
void OnAppFileChanged (object sender, FileSystemEventArgs args)
{
- binWatcher.EnableRaisingEvents = false;
- appFileWatcher.EnableRaisingEvents = false;
+ bin_watcher.EnableRaisingEvents = false;
+ app_file_watcher.EnableRaisingEvents = false;
HttpRuntime.UnloadAppDomain ();
}
+#endif
+
+ internal static void AttachEvents (HttpApplication app)
+ {
+ HttpApplicationFactory factory = theFactory;
+ Hashtable possibleEvents = factory.GetApplicationTypeEvents (app);
+ foreach (string key in possibleEvents.Keys) {
+ int pos = key.IndexOf ('_');
+ if (pos == -1 || key.Length <= pos + 1)
+ continue;
+
+ string moduleName = key.Substring (0, pos);
+ object target;
+ if (moduleName == "Application") {
+ target = app;
+ } else {
+ target = app.Modules [moduleName];
+ if (target == null)
+ continue;
+ }
+
+ string eventName = key.Substring (pos + 1);
+ EventInfo evt = target.GetType ().GetEvent (eventName);
+ if (evt == null)
+ continue;
+
+ string usualName = moduleName + "_" + eventName;
+ object methodData = possibleEvents [usualName];
+ if (methodData == null)
+ continue;
+
+ if (methodData is MethodInfo) {
+ factory.AddHandler (evt, target, app, (MethodInfo) methodData);
+ continue;
+ }
+
+ ArrayList list = (ArrayList) methodData;
+ foreach (MethodInfo method in list)
+ factory.AddHandler (evt, target, app, method);
+ }
+ }
- private void InitializeFactory (HttpContext context)\r
- {\r
- _appFilename = GetAppFilename (context);\r
-\r
- CompileApp (context);\r
-\r
- // Create a application object\r
- HttpApplication app = (HttpApplication) HttpRuntime.CreateInternalObject (_appType);\r
-\r
- // Startup\r
- app.Startup(context, HttpApplicationFactory.ApplicationState);\r
-
- // Shutdown the application if bin directory changes.
- string binFiles = HttpRuntime.BinDirectory;
- if (Directory.Exists (binFiles))
- binFiles = Path.Combine (binFiles, "*.*");
-
- binWatcher = CreateWatcher (binFiles, new FileSystemEventHandler (OnAppFileChanged));
-
- // Fire OnAppStart\r
- HttpApplicationFactory.FireOnAppStart (app);\r
-\r
- // Recycle our application instance\r
- RecyclePublicInstance(app);\r
- }\r
-\r
- private void Dispose() {\r
- ArrayList torelease = new ArrayList();\r
- lock (_appFreePublicList) {\r
- while (_appFreePublicList.Count > 0) {\r
- torelease.Add(_appFreePublicList.Pop());\r
- _appFreePublicInstances--;\r
- }\r
- }\r
-\r
- if (torelease.Count > 0) {\r
- foreach (Object obj in torelease) {\r
- ((HttpApplication) obj).Cleanup();\r
- }\r
- }\r
-\r
- if (!_appFiredEnd) {\r
- lock (this) {\r
- if (!_appFiredEnd) {\r
- FireOnAppEnd();\r
- _appFiredEnd = true;\r
- }\r
- }\r
- }\r
- }\r
-\r
- internal static IHttpHandler GetInstance(HttpContext context)\r
- {\r
- if (custApplication != null)\r
- return custApplication;\r
-\r
- if (!s_Factory._appInitialized) {\r
- lock (s_Factory) {\r
- if (!s_Factory._appInitialized) {\r
- s_Factory.InitializeFactory(context);\r
- s_Factory._appInitialized = true;\r
- }\r
- }\r
- }\r
-\r
- return s_Factory.GetPublicInstance(context);\r
- }\r
-\r
- internal static void RecycleInstance(HttpApplication app) {\r
- if (!s_Factory._appInitialized)\r
- throw new InvalidOperationException("Factory not intialized");\r
-\r
- s_Factory.RecyclePublicInstance(app);\r
- }\r
-\r
- internal static void AttachEvents (HttpApplication app)\r
- {\r
- Hashtable possibleEvents = GetApplicationTypeEvents (app);\r
- foreach (string key in possibleEvents.Keys) {\r
- int pos = key.IndexOf ('_');\r
- if (pos == -1 || key.Length <= pos + 1)\r
- continue;\r
-\r
- string moduleName = key.Substring (0, pos);\r
- object target;\r
- if (moduleName == "Application") {\r
- target = app;\r
- } else {\r
- target = app.Modules [moduleName];\r
- if (target == null)\r
- continue;\r
- }\r
-\r
- string eventName = key.Substring (pos + 1);\r
- EventInfo evt = target.GetType ().GetEvent (eventName);\r
- if (evt == null)\r
- continue;\r
- \r
- string usualName = moduleName + "_" + eventName;\r
- object methodData = possibleEvents [usualName];\r
- if (methodData == null)\r
- continue;\r
-\r
- if (methodData is MethodInfo) {\r
- AddHandler (evt, target, app, (MethodInfo) methodData);\r
- continue;\r
- }\r
-\r
- ArrayList list = (ArrayList) methodData;\r
- foreach (MethodInfo method in list)\r
- AddHandler (evt, target, app, method);\r
- }\r
- }\r
-\r
- static void AddHandler (EventInfo evt, object target, HttpApplication app, MethodInfo method)\r
- {\r
- int length = method.GetParameters ().Length;\r
-\r
- if (length == 0) {\r
- NoParamsInvoker npi = new NoParamsInvoker (app, method.Name);\r
- evt.AddEventHandler (target, npi.FakeDelegate);\r
- } else {\r
- evt.AddEventHandler (target, Delegate.CreateDelegate (\r
- typeof (EventHandler), app, method.Name));\r
- }\r
- }\r
-\r
- private IHttpHandler GetPublicInstance(HttpContext context) {\r
- HttpApplication app = null;\r
-\r
- lock (_appFreePublicList) {\r
- if (_appFreePublicInstances > 0) {\r
- app = (HttpApplication) _appFreePublicList.Pop();\r
- _appFreePublicInstances--;\r
- }\r
- }\r
-\r
- if (app == null) {\r
- // Create non-public object\r
- app = (HttpApplication) HttpRuntime.CreateInternalObject(_appType);\r
-\r
- app.Startup(context, HttpApplicationFactory.ApplicationState);\r
- }\r
-\r
- return (IHttpHandler) app;\r
- }\r
-\r
- internal void RecyclePublicInstance(HttpApplication app) {\r
- lock (_appFreePublicList) {\r
- if (_appFreePublicInstances < _appMaxFreePublicInstances) {\r
- _appFreePublicList.Push(app);\r
- _appFreePublicInstances++;\r
-\r
- app = null;\r
- }\r
- }\r
- \r
- if (app != null) {\r
- app.Cleanup();\r
- }\r
- }\r
-\r
- static HttpStaticObjectsCollection MakeStaticCollection (ArrayList list)\r
- {\r
- if (list == null || list.Count == 0)\r
- return null;\r
-\r
- HttpStaticObjectsCollection coll = new HttpStaticObjectsCollection ();\r
- foreach (ObjectTagBuilder tag in list) {\r
- coll.Add (tag);\r
- }\r
-\r
- return coll;\r
- }\r
- \r
- static internal HttpApplicationState ApplicationState {\r
- get {\r
- if (null == s_Factory._state) {\r
- HttpStaticObjectsCollection app = MakeStaticCollection (GlobalAsaxCompiler.ApplicationObjects);\r
- HttpStaticObjectsCollection ses = MakeStaticCollection (GlobalAsaxCompiler.SessionObjects);\r
- s_Factory._state = new HttpApplicationState (app, ses);\r
- }\r
-\r
- return s_Factory._state;\r
- }\r
- }\r
-\r
- internal static void EndApplication() {\r
- s_Factory.Dispose();\r
- }\r
-\r
- public static void SetCustomApplication (IHttpHandler customApplication)\r
- {\r
- custApplication = customApplication;\r
- }\r
-\r
- internal Type AppType {\r
- get { return _appType; }\r
- }\r
-\r
- internal static void SignalError(Exception exc) {\r
- // TODO: Raise an error (we probably don't have a HttpContext)\r
- }\r
- }\r
-}\r
+ void AddHandler (EventInfo evt, object target, HttpApplication app, MethodInfo method)
+ {
+ int length = method.GetParameters ().Length;
+
+ if (length == 0) {
+ NoParamsInvoker npi = new NoParamsInvoker (app, method.Name);
+ evt.AddEventHandler (target, npi.FakeDelegate);
+ } else {
+ evt.AddEventHandler (target, Delegate.CreateDelegate (
+ typeof (EventHandler), app, method.Name));
+ }
+ }
+
+ static HttpStaticObjectsCollection MakeStaticCollection (ArrayList list)
+ {
+ if (list == null || list.Count == 0)
+ return null;
+
+ HttpStaticObjectsCollection coll = new HttpStaticObjectsCollection ();
+ foreach (ObjectTagBuilder tag in list) {
+ coll.Add (tag);
+ }
+
+ return coll;
+ }
+
+ internal static HttpApplicationState ApplicationState {
+#if TARGET_J2EE
+ get {
+ HttpApplicationFactory factory = theFactory;
+ if (factory.app_state == null)
+ factory.app_state = new HttpApplicationState (null, null);
+ return factory.app_state;
+ }
+#else
+ get {
+ if (theFactory.app_state == null) {
+ HttpStaticObjectsCollection app = MakeStaticCollection (GlobalAsaxCompiler.ApplicationObjects);
+ HttpStaticObjectsCollection ses = MakeStaticCollection (GlobalAsaxCompiler.SessionObjects);
+
+ theFactory.app_state = new HttpApplicationState (app, ses);
+ }
+ return theFactory.app_state;
+ }
+#endif
+ }
+
+ public static void SetCustomApplication (IHttpHandler customApplication)
+ {
+ theFactory.custom_application = customApplication;
+ }
+
+ internal static Type AppType {
+ get {
+ return theFactory.app_type;
+ }
+ }
+
+ void InitType (HttpContext context)
+ {
+ lock (this) {
+ if (!needs_init)
+ return;
+
+ string physical_app_path = context.Request.PhysicalApplicationPath;
+ string app_file;
+
+ app_file = Path.Combine (physical_app_path, "Global.asax");
+ if (!File.Exists (app_file))
+ app_file = Path.Combine (physical_app_path, "global.asax");
+
+ WebConfigurationSettings.Init (context);
+
+ if (File.Exists (app_file)) {
+#if TARGET_J2EE
+ app_type = System.Web.J2EE.PageMapper.GetObjectType(app_file);
+#else
+ app_type = ApplicationFileParser.GetCompiledApplicationType (app_file, context);
+ if (app_type == null) {
+ string msg = String.Format ("Error compiling application file ({0}).", app_file);
+ throw new ApplicationException (msg);
+ }
+
+ app_file_watcher = CreateWatcher (app_file, new FileSystemEventHandler (OnAppFileChanged));
+#endif
+ } else {
+ app_type = typeof (System.Web.HttpApplication);
+ app_state = new HttpApplicationState ();
+ }
+ needs_init = false;
+
+ //
+ // Now init the settings
+ //
+
+ }
+ }
+
+ //
+ // Multiple-threads might hit this one on startup, and we have
+ // to delay-initialize until we have the HttpContext
+ //
+ internal static HttpApplication GetApplication (HttpContext context)
+ {
+ HttpApplicationFactory factory = theFactory;
+ if (factory.needs_init){
+ if (context == null)
+ return null;
+
+ factory.InitType (context);
+ factory.FireOnAppStart (context);
+ }
+
+ lock (factory) {
+ if (factory.available.Count > 0)
+ return (HttpApplication) factory.available.Pop ();
+ }
+
+ HttpApplication app = (HttpApplication) Activator.CreateInstance (factory.app_type, true);
+
+ return app;
+ }
+
+ internal static void Recycle (HttpApplication app)
+ {
+ HttpApplicationFactory factory = theFactory;
+ lock (factory) {
+ if (factory.available.Count < 32)
+ factory.available.Push (app);
+ else
+ app.Dispose ();
+ }
+ }
+ }
+}
projects / mono.git / blobdiff