LP #142502: Added a knob to the Debug control panel to reset profile data.

Thanks to Vladimir Patukhov for the patch.  

doc/CHANGES.rst

@@ -100,6 +100,9 @@ Restructuring
 Features Added
 ++++++++++++++
 
+- LP #142502:  Added a knob to the Debug control panel for resetting
+  profile data.  Thanks to Vladimir Patukhov for the patch.
+
 - LP #143232: Added option to 'zope.conf' to specify an additional directory
   to be searched for 'App.Extensions' lookups.  Thanks to Rodrigo Senra for
   the patch.

src/App/ApplicationManager.py

@@ -39,6 +39,7 @@ from OFS.SimpleItem import SimpleItem
 from Product import ProductFolder
 from Products.PageTemplates.PageTemplateFile import PageTemplateFile
 from zExceptions import Redirect
+from ZPublisher import Publish
 
 LOG = getLogger('ApplicationManager')
 
@@ -252,6 +253,11 @@ class DebugManager(Item, Implicit):
         sys.stdout = stdout
         return output.getvalue()
 
+    def manage_profile_reset(self):
+        """ Reset profile data
+        """
+        Publish._pstat = sys._ps_ = None
+
     def manage_getSysPath(self):
         return list(sys.path)
 

src/App/dtml/profile.dtml

 <dtml-var manage_page_header>
 <dtml-var manage_tabs>
 
+<dtml-if "REQUEST.get('reset')">
+
+<dtml-call "manage_profile_reset()">
+<br />
+<div class="form-text">
+Profiling data was reset.
+</div>
+
+<dtml-else>
+
 <dtml-let sort="REQUEST.get('sort', 'time')"
           limit="REQUEST.get('limit', 100)" 
           mode="REQUEST.get('mode', 'stats')" 
@@ -50,6 +60,8 @@ Python profiler documentation</a>.
 </td>
 <td>
 <input type="submit" name="submit" value="Update">
+&nbsp;
+<input type="submit" name="reset" value="Reset data">
 </td>
 </tr>
 </table>
@@ -71,4 +83,6 @@ used to dump a profile report when the process restarts or exits.
 </dtml-if>
 </dtml-let>
 
+</dtml-if>
+
 <dtml-var manage_page_footer>

src/App/tests/test_ApplicationManager.py

@@ -239,6 +239,23 @@ class DebugManagerTests(unittest.TestCase):
     #def test_dbconnections(self):  XXX -- TOO UGLY TO TEST
     #def test_manage_profile_stats(self):  XXX -- TOO UGLY TO TEST
 
+    def test_manage_profile_reset(self):
+        import sys
+        from ZPublisher import Publish
+        _old_sys__ps_ = getattr(sys, '_ps_', self)
+        _old_Publish_pstat = getattr(Publish, '_pstat', self)
+        sys._ps_ = Publish._pstat = object()
+        try:
+            dm = self._makeOne('test')
+            dm.manage_profile_reset()
+        finally:
+            if _old_sys__ps_ is not self:
+                sys._ps_ = _old_sys__ps_
+            if _old_Publish_pstat is not self:
+                Publish._pstat = _old_Publish_pstat
+        self.failUnless(sys._ps_ is None)
+        self.failUnless(Publish._pstat is None)
+
     def test_manage_getSysPath(self):
         import sys
         dm = self._makeOne('test')