Add Application initialization

When splitting off this product from the main Zope repository, the
Application initialization has been removed. This code brings back the
automatically created site error log.

setup.py

@@ -21,7 +21,7 @@
     'Acquisition',
     'transaction',
     'zExceptions',
-    'Zope2 >= 4.0.dev0',
+    'Zope2 >= 4.0b5',
     'zope.component',
     'zope.interface',
     'zope.event',

src/Products/SiteErrorLog/__init__.py

@@ -14,8 +14,29 @@
 
 from . import SiteErrorLog
 
+def commit(note):
+    import transaction
+    transaction.get().note(note)
+    transaction.commit()
+
+def install_errorlog(app):
+    if hasattr(app, 'error_log'):
+        return
+
+    error_log = SiteErrorLog.SiteErrorLog()
+    app._setObject('error_log', error_log)
+    # FIXME explicitly call manage_afterAdd, as sometimes
+    # events are initialized too late
+    error_log = app.error_log
+    error_log.manage_afterAdd(error_log, app)
+    commit(u'Added site error_log at /error_log')
+
 
 def initialize(context):
     context.registerClass(SiteErrorLog.SiteErrorLog,
                           constructors=(SiteErrorLog.manage_addErrorLog,),
                           permission=SiteErrorLog.use_error_logging)
+
+    app = context.getApplication() # new API added in Zope 4.0b5
+    if app is not None:
+        install_errorlog(app)

src/Products/SiteErrorLog/tests/testInitialization.py

@@ -0,0 +1,87 @@
+##############################################################################
+#
+# Copyright (c) 2001, 2002 Zope Foundation and Contributors.
+# All Rights Reserved.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+##############################################################################
+
+import os
+import shutil
+import tempfile
+import unittest
+
+from App.config import getConfiguration, setConfiguration
+from OFS.Application import Application, AppInitializer
+from Zope2.Startup.options import ZopeWSGIOptions
+
+TEMPNAME = tempfile.mktemp()
+TEMPPRODUCTS = os.path.join(TEMPNAME, "Products")
+
+good_cfg = """
+instancehome <<INSTANCE_HOME>>
+
+<zodb_db main>
+   mount-point /
+   <mappingstorage>
+      name mappingstorage
+   </mappingstorage>
+</zodb_db>
+"""
+
+original_config = None
+
+
+def getApp():
+    from App.ZApplication import ZApplicationWrapper
+    DB = getConfiguration().dbtab.getDatabase('/')
+    return ZApplicationWrapper(DB, 'Application', Application)()
+
+
+class TestInitialization(unittest.TestCase):
+    """ Test the application initialization """
+
+    def setUp(self):
+        global original_config
+        if original_config is None:
+            original_config = getConfiguration()
+        os.makedirs(TEMPNAME)
+        os.makedirs(TEMPPRODUCTS)
+
+    def tearDown(self):
+        import App.config
+        App.config.setConfiguration(original_config)
+        shutil.rmtree(TEMPNAME)
+        import Products
+        Products.__path__ = [d for d in Products.__path__
+                             if os.path.exists(d)]
+
+    def configure(self, text):
+        # We have to create a directory of our own since the existence
+        # of the directory is checked.  This handles this in a
+        # platform-independent way.
+        config_path = os.path.join(TEMPNAME, 'zope.conf')
+        with open(config_path, 'w') as fd:
+            fd.write(text.replace(u"<<INSTANCE_HOME>>", TEMPNAME))
+
+        options = ZopeWSGIOptions(config_path)()
+        config = options.configroot
+        self.assertEqual(config.instancehome, TEMPNAME)
+        setConfiguration(config)
+
+    def getOne(self):
+        app = getApp()
+        return AppInitializer(app)
+
+    def test_install_session_data_manager(self):
+        self.configure(good_cfg)
+        i = self.getOne()
+        i.install_products()
+        app = i.getApp()
+        self.assertEqual(app.error_log.meta_type, 'Site Error Log')