Localizer: replace the 'Global Request' monkey-patch with zope.globalrequest

zope.globalrequest is a new dependency of Zope 4
and it is already used by the backported WSGIPublisher.

product/CMFActivity/ActivityTool.py

@@ -60,12 +60,7 @@ import transaction
 from App.config import getConfiguration
 from Shared.DC.ZRDB.Results import Results
 
-import Products.Localizer.patches
-localizer_lock = Products.Localizer.patches._requests_lock
-localizer_contexts = Products.Localizer.patches._requests
-LocalizerContext = lambda request: request
-
-
+from zope.globalrequest import getRequest, setRequest
 from Products.MailHost.MailHost import MailHostError
 
 from zLOG import LOG, INFO, WARNING, ERROR
@@ -1464,7 +1459,7 @@ class ActivityTool (BaseTool):
     def invoke(self, message):
       if self.activity_tracking:
         activity_tracking_logger.info('invoking message: object_path=%s, method_id=%s, args=%r, kw=%r, activity_kw=%r, user_name=%s' % ('/'.join(message.object_path), message.method_id, message.args, message.kw, message.activity_kw, message.user_name))
-      old_localizer_context = False
+      old_request = None
       if getattr(self, 'aq_chain', None) is not None:
         # Grab existing acquisition chain and extrach base objects.
         base_chain = [aq_base(x) for x in self.aq_chain]
@@ -1500,16 +1495,8 @@ class ActivityTool (BaseTool):
           new_request.other['VirtualRootPhysicalPath'] = request_info['VirtualRootPhysicalPath']
         if 'HTTP_ACCEPT_LANGUAGE' in request_info:
           new_request.environ['HTTP_ACCEPT_LANGUAGE'] = request_info['HTTP_ACCEPT_LANGUAGE']
-          # Replace Localizer/iHotfix Context, saving existing one
-          localizer_context = LocalizerContext(new_request)
-          id = get_ident()
-          localizer_lock.acquire()
-          try:
-            old_localizer_context = localizer_contexts.get(id)
-            localizer_contexts[id] = localizer_context
-          finally:
-            localizer_lock.release()
-          # Execute Localizer/iHotfix "patch 2"
+          old_request = getRequest()
+          setRequest(new_request)
           new_request.processInputs()
 
         new_request_container = request_container.__class__(REQUEST=new_request)
@@ -1528,17 +1515,7 @@ class ActivityTool (BaseTool):
           # Restore default skin selection
           skinnable = self.getPortalObject()
           skinnable.changeSkin(skinnable.getSkinNameFromRequest(request))
-        if old_localizer_context is not False:
-          # Restore Localizer/iHotfix context
-          id = get_ident()
-          localizer_lock.acquire()
-          try:
-            if old_localizer_context is None:
-              del localizer_contexts[id]
-            else:
-              localizer_contexts[id] = old_localizer_context
-          finally:
-            localizer_lock.release()
+        setRequest(old_request)
       if self.activity_tracking:
         activity_tracking_logger.info('invoked message')
       if my_self is not self: # We rewrapped self

product/ERP5Type/Globals.py

@@ -38,19 +38,7 @@ from App.class_init import default__class_init__, ApplicationDefaultPermissions
 # Nicer alias for class initializer.
 InitializeClass = default__class_init__
 
-##########################################
-# Localizer is not always loaded prior to ERP5 products,
-# thus, as Localizer is supposed to patch Global to add get_request to it,
-# we prefer to redefine get_request inside ERP5Type/Utils,
-# to avoid the case when Global wasn't patched and get_request is not available.
-# This is specially important on Zope 2.12 where Globals doesn't even exist.
-##########################################
-try:
-    import Products.iHotfix
-    get_request = Products.iHotfix.get_request
-except (ImportError, AttributeError):
-    import Products.Localizer
-    get_request = Products.Localizer.get_request
+from zope.globalrequest import getRequest as get_request
 
 # Persistency stuff also hasn't moved much from Zope 2.8, although the old
 # "Persistence" module remains there for ancient backward compatibility.

product/ERP5Type/__init__.py

@@ -30,7 +30,7 @@
     ERP5Type is provides a RAD environment for Zope / CMF
     All ERP5 classes derive from ERP5Type
 """
-from patches import python, pylint
+from patches import python, pylint, globalrequest
 from zLOG import LOG, INFO
 DISPLAY_BOOT_PROCESS = False
 

product/ERP5Type/patches/globalrequest.py

+try:
+  import zope.globalrequest
+except ImportError:
+  import sys
+  sys.modules['zope.globalrequest'] = sys.modules[__name__]
+
+  from threading import local
+  localData = local()
+
+  def getRequest():
+    return getattr(localData, 'request', None)
+
+  def setRequest(request):
+    localData.request = request
+
+  def clearRequest():
+    setRequest(None)

product/ERP5Type/tests/ERP5TypeLiveTestCase.py

@@ -31,7 +31,6 @@ import os
 import sys
 import imp
 import re
-import thread
 
 from Testing import ZopeTestCase
 from Testing.ZopeTestCase import PortalTestCase, user_name
@@ -97,10 +96,9 @@ class ERP5TypeLiveTestCase(ERP5TypeTestCaseMixin):
         registry._conns[-1] = portal
 
       # This is for Localizer patch
-      from Products.Localizer import patches
+      from zope.globalrequest import setRequest
       request = portal.REQUEST
-      with patches._requests_lock:
-        patches._requests[thread.get_ident()] = request
+      setRequest(request)
 
       # Make live tests run under the same server URL than the host instance.
       if _request_server_url:

product/Localizer/patches.py

@@ -21,7 +21,6 @@ This is a hotfix, it dynamically applies several patches to Zope.
 # Import from the Standard Library
 import logging
 import os
-from thread import allocate_lock, get_ident
 
 # Import from itools
 from .itools.i18n import AcceptLanguageType
@@ -30,7 +29,8 @@ from .itools.i18n import AcceptLanguageType
 import Globals
 from ZPublisher import Publish
 from ZPublisher.HTTPRequest import HTTPRequest
-
+from zope.globalrequest import clearRequest, setRequest
+from zope.globalrequest import getRequest as get_request
 
 # Flag
 patch = False
@@ -57,56 +57,21 @@ logger = logging.getLogger('Localizer')
 # Also, we keep the get_request method in the Globals module for backwards
 # compatibility (with TranslationService for example).
 
-_requests = {}
-_requests_lock = allocate_lock()
-
-
-def get_request():
-    """Get a request object"""
-    return _requests.get(get_ident(), None)
-
-
-def new_publish(request, module_name, after_list, debug=0,
-                zope_publish=Publish.publish):
-    # Get the process id
-    ident = get_ident()
-
-    # Add the request object to the global dictionnary
-    _requests_lock.acquire()
-    try:
-        _requests[ident] = request
-    finally:
-        _requests_lock.release()
-
-    # Call the old publish
-    try:
-        # Publish
-        x = zope_publish(request, module_name, after_list, debug)
-    finally:
-        # Remove the request object.
-        # When conflicts occur the "publish" method is called again,
-        # recursively. In this situation the "_requests dictionary would
-        # be cleaned in the innermost call, hence outer calls find the
-        # request does not exist anymore. For this reason we check first
-        # wether the request is there or not.
-        if ident in _requests:
-            _requests_lock.acquire()
-            try:
-                del _requests[ident]
-            finally:
-                _requests_lock.release()
-
-    return x
+def get_new_publish(zope_publish):
+    def publish(request, *args, **kwargs):
+        try:
+            setRequest(request)
+            return zope_publish(request, *args, **kwargs)
+        finally:
+            clearRequest()
+    return publish
 
 
 if patch is False:
     logger.info('Install "Globals.get_request".')
 
     # Apply the patch
-    Publish.publish = new_publish
-
-    # First import (it's not a refresh operation).
-    # We need to apply the patches.
+    Publish.publish = get_new_publish(Publish.publish)
     patch = True
 
     # Add to Globals for backwards compatibility