def no_loop_in_parents(self, attr1, attr2):
"""Find loop in dependencies.
For now, used with the following attributes :
:(self, parents): host dependencies from host object
:(host_name, dependent_host_name): host dependencies from hostdependencies object
:(service_description, dependent_service_description): service dependencies from servicedependencies object
"""
# Ok, we say "from now, no loop :) "
r = True
# Create parent graph
parents = Graph()
# Start with all items as nodes
for item in self:
# Hack to get self here. Used when looping on host and host parent's
if attr1 == "self":
obj = item # obj is a host/service [list]
else:
obj = getattr(item, attr1, None)
if obj is not None:
if isinstance(obj, list):
for sobj in obj:
parents.add_node(sobj)
else:
parents.add_node(obj)
# And now fill edges
for item in self:
if attr1 == "self":
obj1 = item
else:
obj1 = getattr(item, attr1, None)
obj2 = getattr(item, attr2, None)
if obj2 is not None:
if isinstance(obj2, list):
for sobj2 in obj2:
if isinstance(obj1, list):
for sobj1 in obj1:
parents.add_edge(sobj1, sobj2)
else:
parents.add_edge(obj1, sobj2)
else:
if isinstance(obj1, list):
for sobj1 in obj1:
parents.add_edge(sobj1, obj2)
else:
parents.add_edge(obj1, obj2)
# Now get the list of all item in a loop
items_in_loops = parents.loop_check()
# and raise errors about it
for item in items_in_loops:
logger.error("The %s object '%s' is part of a circular parent/child chain!", item.my_type, item.get_name())
r = False
return r
def __init__(self, items):
self.items = {}
self.configuration_warnings = []
self.configuration_errors = []
for i in items:
self.items[i.id] = i
self.templates = {}
# We should keep a graph of templates relations
self.templates_graph = Graph()
