Change the request ids to use urns. Add the logger name to the log formatter.

util/names.py

@@ -1,6 +1,7 @@
 import urllib
 
 from functools import wraps
+from uuid import uuid4
 
 
 def parse_namespace_repository(repository):
@@ -25,8 +26,19 @@ def parse_repository_name(f):
 def format_robot_username(parent_username, robot_shortname):
   return '%s+%s' % (parent_username, robot_shortname)
 
+
 def parse_robot_username(robot_username):
   if not '+' in robot_username:
     return None
 
   return robot_username.split('+', 2)
+
+
+uuid_generator = lambda: str(uuid4())
+
+
+def urn_generator(namespace_portions, id_generator=uuid_generator):
+  prefix = 'urn:%s:' % ':'.join(namespace_portions)
+  def generate_urn():
+    return prefix + id_generator()
+  return generate_urn