Use zope.conf product statement.

Thanks to this no inplace code changes are required to activate product
functionality.

product/DeadlockDebugger/README.txt

@@ -25,9 +25,14 @@ please check the event.log for ERROR message.
 Configuration
 -------------
 
-You must edit the file custom.py for your needs. You have to change
-ACTIVATED to True, and change SECRET. You may change the URL that's
-intercepted by the hook to do the dump.
+You must edit your zope.conf file and add product configuration:
+
+<product-config deadlockdebugger>
+  dump_url /manage_debug_threads
+  secret mysecretkey
+</product-config>
+
+secret is optional.
 
 Usage
 -----
@@ -42,7 +47,7 @@ A secret is needed because Zope doesn't do any access control on the URL
 (it is intercepted too early), and the thread traceback dump may return
 sensitive information about the requests being executed. If you know
 your Zope will only be accessed by authorized persons anyway, you can
-set SECRET to the empty string, and just call::
+set secret to the empty string, and just call::
 
   http://yourzopesite:8080/manage_debug_threads
 

product/DeadlockDebugger/VERSION.txt

-1.0
+1.1-nxd

product/DeadlockDebugger/__init__.py

@@ -22,23 +22,29 @@
 This adds a ZServer hook so that if a special URL is called, a full dump
 with tracebacks of the running python threads will be made.
 
-You MUST configure the file custom.py before use.
+You MUST configure zope.conf before use.
 """
 
-import custom
 from zLOG import LOG, INFO, ERROR
+from App.config import getConfiguration
 
 try:
     import threadframe
 except ImportError:
     LOG('DeadlockDebugger', ERROR, "Incorrectly installed threadframe module")
 else:
-    if not custom.ACTIVATED:
-        LOG('DeadlockDebugger', INFO,
-            "Not activated, you must change ACTIVATED in custom.py")
-    elif custom.SECRET == 'secret':
-        LOG('DeadlockDebugger', ERROR,
-            "Not activated, you must change SECRET in custom.py")
+    config = getConfiguration()
+    deadlockdebugger = config.product_config.get('deadlockdebugger')
+    dump_url = ''
+    secret = ''
+    if deadlockdebugger is None:
+        LOG('DeadlockDebugger', ERROR, 'Missing configuration statement '
+          '<product-config deadlockdebugger>, not activated')
     else:
-        import dumper
-        LOG('DeadlockDebugger', INFO, "Installed")
+        if not 'dump_url' in deadlockdebugger:
+            LOG('DeadlockDebugger', ERROR, 'Please configure dump_url and '
+                'optionally secret in <product-config deadlockdebugger>, not '
+                'activated')
+        else:
+            import dumper
+            LOG('DeadlockDebugger', INFO, "Installed")

product/DeadlockDebugger/custom.py

-# Customize this file for your specific configuration.
-# You *must* change ACTIVATED and SECRET.
-#
-# The URL to use for the dump is DUMP_URL?SECRET
-# If SECRET is empty, DUMP_URL is enough.
-#
-# *** NOTE ABOUT SECURITY ***
-#
-# No Zope access control is done on this URL, as it is interpreted
-# before the Zope application server comes into play. That's why you
-# should change the secret or filter this URL before it gets to Zope,
-# for instance in Apache.
-
-ACTIVATED = False
-SECRET = 'secret' # you must change this
-DUMP_URL = '/manage_debug_threads'

product/DeadlockDebugger/dumper.py

@@ -28,10 +28,8 @@ import traceback
 import time
 from cStringIO import StringIO
 
-from zLOG import LOG, DEBUG
-
-import custom
-
+from zLOG import LOG, DEBUG, ERROR
+from App.config import getConfiguration
 
 def dump_threads():
     """Dump running threads
@@ -74,9 +72,15 @@ def dump_threads():
     res.append("End of dump")
     return '\n'.join(res)
 
-dump_url = custom.DUMP_URL
-if custom.SECRET:
-    dump_url += '?'+custom.SECRET
+config = getConfiguration()
+deadlockdebugger = config.product_config.get('deadlockdebugger')
+dump_url = ''
+secret = ''
+dump_url = deadlockdebugger['dump_url']
+secret = deadlockdebugger.get('secret', '')
+
+if dump_url and secret:
+    dump_url += '?'+secret
 
 def match(self, request):
     uri = request.uri