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Fix the way handlers are compiled and found/notified

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* Instead of rebuilding the handler list all over the place, we now
  compile the handlers at the point the play is post-validated so that
  the view of the play in the PlayIterator contains the definitive list
* Assign the dep_chain to the handlers as they're compiling, just as we
  do for regular tasks
* Clean up the logic used to find a given handler, which is greatly
  simplified by the above changes

Fixes #15418
This commit is contained in:
James Cammarata 2016-07-06 14:40:11 -05:00
commit 930d090507
4 changed files with 32 additions and 29 deletions
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34
lib/ansible/plugins/strategy/__init__.py
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@ -349,33 +349,27 @@ class StrategyBase:
# dependency chain of the current task (if it's from a role), otherwise
# we just look through the list of handlers in the current play/all
# roles and use the first one that matches the notify name
target_handler = None
if original_task._role:
target_handler = search_handler_blocks(handler_name, original_task._role.get_handler_blocks())
if target_handler is None:
target_handler = search_handler_blocks(handler_name, iterator._play.handlers)
if target_handler is None:
if handler_name in self._listening_handlers:
for listening_handler_name in self._listening_handlers[handler_name]:
listening_handler = None
if original_task._role:
listening_handler = search_handler_blocks(listening_handler_name, original_task._role.get_handler_blocks())
if listening_handler is None:
listening_handler = search_handler_blocks(listening_handler_name, iterator._play.handlers)
if listening_handler is None:
raise AnsibleError("The requested handler listener '%s' was not found in any of the known handlers" % listening_handler_name)
if handler_name in self._listening_handlers:
for listening_handler_name in self._listening_handlers[handler_name]:
listening_handler = search_handler_blocks(listening_handler_name, iterator._play.handlers)
if listening_handler is None:
raise AnsibleError("The requested handler listener '%s' was not found in any of the known handlers" % listening_handler_name)
if original_host not in self._notified_handlers[listening_handler]:
self._notified_handlers[listening_handler].append(original_host)
display.vv("NOTIFIED HANDLER %s" % (listening_handler_name,))
else:
raise AnsibleError("The requested handler '%s' was found in neither the main handlers list nor the listening handlers list" % handler_name)
if original_host not in self._notified_handlers[listening_handler]:
self._notified_handlers[listening_handler].append(original_host)
display.vv("NOTIFIED HANDLER %s" % (listening_handler_name,))
else:
target_handler = search_handler_blocks(handler_name, iterator._play.handlers)
if target_handler is None:
raise AnsibleError("The requested handler '%s' was not found in any of the known handlers" % handler_name)
if target_handler in self._notified_handlers:
if original_host not in self._notified_handlers[target_handler]:
self._notified_handlers[target_handler].append(original_host)
# FIXME: should this be a callback?
display.vv("NOTIFIED HANDLER %s" % (handler_name,))
else:
raise AnsibleError("The requested handler '%s' was found in neither the main handlers list nor the listening handlers list" % handler_name)
elif result[0] == 'register_host_var':
# essentially the same as 'set_host_var' below, however we