System.Data.SQLite
Check-in [1d024437e5]
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Overview
Comment:Preliminary fix for [b4a7ddc83f], shutdown the SQLite native interface when the AppDomain is being unloaded.
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Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA1: 1d024437e53cdfbf99f3eb469440485c4130a130
User & Date: mistachkin 2011-07-21 17:18:30
References
2011-07-21
21:48 Closed ticket [b4a7ddc83f]: Exception when reloading IIS application plus 4 other changes artifact: b2ecb59f9a user: mistachkin
Context
2011-07-21
21:46
Add comment to warn about the nature of the current fix for [b4a7ddc83f]. check-in: f5c5f581dc user: mistachkin tags: trunk
17:18
Preliminary fix for [b4a7ddc83f], shutdown the SQLite native interface when the AppDomain is being unloaded. check-in: 1d024437e5 user: mistachkin tags: trunk
17:15
Update test case for [b4a7ddc83f]. check-in: 10f4be9ed4 user: mistachkin tags: trunk
Changes
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Changes to System.Data.SQLite/SQLiteLog.cs.

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        /// Initializes the SQLite logging facilities.
        /// </summary>
        public static void Initialize()
        {
            lock (syncRoot)
            {
                //









                // NOTE: Create a single "global" 
                //
                if (_sql == null)
                    _sql = new SQLite3(SQLiteDateFormats.ISO8601);

                //
                // NOTE: Create a single "global" (i.e. per-process) callback
                //       to register with SQLite.  This callback will pass the
                //       event on to any registered handler.  We only want to
                //       do this once.
                //
................................................................................
                {
                    _callback = new SQLiteLogCallback(LogCallback);

                    int rc = _sql.SetLogCallback(_callback);

                    if (rc != 0)
                        throw new SQLiteException(rc,
                            "Failed to initialize logging interface.");
                }

                //
                // NOTE: Logging is enabled by default.
                //
                _enabled = true;

                //
                // NOTE: For now, always setup the default log event handler.
                //
                AddDefaultHandler();
            }
        }



























        /// <summary>
        /// This event is raised whenever SQLite raises a logging event.
        /// Note that this should be set as one of the first things in the
        /// application.
        /// </summary>
        public static event SQLiteLogEventHandler Log







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        /// Initializes the SQLite logging facilities.
        /// </summary>
        public static void Initialize()
        {
            lock (syncRoot)
            {
                //
                // NOTE: Add an event handler for the DomainUnload event so
                //       that we can unhook our logging managed function
                //       pointer from the native SQLite code prior to it
                //       being invalidated.
                //
                AppDomain.CurrentDomain.DomainUnload +=
                    new EventHandler(DomainUnload);

                //
                // NOTE: Create an instance of the SQLite wrapper class.
                //
                if (_sql == null)
                    _sql = new SQLite3(SQLiteDateFormats.Default);

                //
                // NOTE: Create a single "global" (i.e. per-process) callback
                //       to register with SQLite.  This callback will pass the
                //       event on to any registered handler.  We only want to
                //       do this once.
                //
................................................................................
                {
                    _callback = new SQLiteLogCallback(LogCallback);

                    int rc = _sql.SetLogCallback(_callback);

                    if (rc != 0)
                        throw new SQLiteException(rc,
                            "Failed to initialize logging.");
                }

                //
                // NOTE: Logging is enabled by default.
                //
                _enabled = true;

                //
                // NOTE: For now, always setup the default log event handler.
                //
                AddDefaultHandler();
            }
        }

        /// <summary>
        /// Handles the AppDomain being unloaded.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private static void DomainUnload(
            object sender,
            EventArgs e
            )
        {
            if (_sql != null)
            {
                int rc = _sql.Shutdown();

                if (rc != 0)
                    throw new SQLiteException(rc,
                        "Failed to shutdown interface.");

                rc = _sql.SetLogCallback(null);

                if (rc != 0)
                    throw new SQLiteException(rc,
                        "Failed to shutdown logging.");
            }
        }

        /// <summary>
        /// This event is raised whenever SQLite raises a logging event.
        /// Note that this should be set as one of the first things in the
        /// application.
        /// </summary>
        public static event SQLiteLogEventHandler Log

Changes to Tests/tkt-b4a7ddc83f.eagle.

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..
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package require EagleLibrary
package require EagleTest

runTestPrologue

###############################################################################

# set ::test_configuration Debug

source [file join $path common.eagle]
runSQLiteTestPrologue

###############################################################################

runTest {test tkt-b4a7ddc83f-1.1 {initialization/shutdown} -setup [subst {
  set fileName tkt-b4a7ddc83f-1.1.db
  set ::path {$::path}
  set ::test_configuration {$::test_configuration}
  source [file join $::path common.eagle]
}] -body {
  package require EagleTest
  tryLoadAssembly System.Data.SQLite.dll
................................................................................
  unset -nocomplain db fileName
} -constraints {eagle monoBug28 command.sql compile.DATA\
compile.ISOLATED_INTERPRETERS System.Data.SQLite} -isolationLevel AppDomain \
-match regexp -result {^SQLiteConnection#\d+$}}

###############################################################################

runTest {test tkt-b4a7ddc83f-1.2 {initialization/shutdown} -setup [subst {
  set fileName tkt-b4a7ddc83f-1.2.db
  set ::path {$::path}
  set ::test_configuration {$::test_configuration}
  source [file join $::path common.eagle]
}] -body {
  package require EagleTest
  tryLoadAssembly System.Data.SQLite.dll







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package require EagleLibrary
package require EagleTest

runTestPrologue

###############################################################################



source [file join $path common.eagle]
runSQLiteTestPrologue

###############################################################################

runTest {test tkt-b4a7ddc83f-1.1 {logging shutdown, step 1} -setup [subst {
  set fileName tkt-b4a7ddc83f-1.1.db
  set ::path {$::path}
  set ::test_configuration {$::test_configuration}
  source [file join $::path common.eagle]
}] -body {
  package require EagleTest
  tryLoadAssembly System.Data.SQLite.dll
................................................................................
  unset -nocomplain db fileName
} -constraints {eagle monoBug28 command.sql compile.DATA\
compile.ISOLATED_INTERPRETERS System.Data.SQLite} -isolationLevel AppDomain \
-match regexp -result {^SQLiteConnection#\d+$}}

###############################################################################

runTest {test tkt-b4a7ddc83f-1.2 {logging shutdown, step 2} -setup [subst {
  set fileName tkt-b4a7ddc83f-1.2.db
  set ::path {$::path}
  set ::test_configuration {$::test_configuration}
  source [file join $::path common.eagle]
}] -body {
  package require EagleTest
  tryLoadAssembly System.Data.SQLite.dll