def parse(cls, data, from_user=True):
def validate_dependencies(contrs):
contrs = {c.id: c for c in contrs}
parents = {}
for c in contrs.values():
nonexist = list(filter(lambda c: c not in contrs, c.dependencies))
if nonexist:
return 422, None, "Dependencies '%s' do not exist in this appliance" % nonexist
parents.setdefault(c.id, set()).update(c.dependencies)
for c, p in parents.items():
cycles = ['%s<->%s' % (c, pp)
for pp in filter(lambda x: c in parents.get(x, set()), p)]
if cycles:
return 422, None, "Cycle(s) found: %s" % cycles
return 200, 'Dependencies are valid', None
if not isinstance(data, dict):
return 422, None, "Failed to parse appliance request format: %s"%type(data)
missing = Appliance.REQUIRED - data.keys()
if missing:
return 400, None, "Missing required field(s) of appliance: %s"%missing
fields = {}
# instantiate container objects
containers, contr_ids = [], set()
for c in data.pop('containers', []):
if c['id'] in contr_ids:
return 400, None, "Duplicate container id: %s"%c['id']
if from_user:
for unwanted_f in ('appliance', ):
c.pop(unwanted_f, None)
status, contr, err = Container.parse(dict(**c, appliance=data['id']), from_user)
if status != 200:
return status, None, err
containers.append(contr)
contr_ids.add(contr.id)
addresses = set()
for c in containers:
if c.cmd:
addresses.update(get_short_ids(c.cmd))
for arg in c.args:
addresses.update(get_short_ids(arg))
for v in c.env.values():
addresses.update(get_short_ids(v))
undefined = list(addresses - contr_ids)
if undefined:
return 400, None, "Undefined container(s): %s"%undefined
status, msg, err = validate_dependencies(containers)
if status != 200:
return status, None, err
fields.update(containers=containers)
# instantiate data persistence object
if 'data_persistence' in data:
status, dp, err = DataPersistence.parse(dict(**data.pop('data_persistence', {}),
appliance=data['id']), from_user)
if status != 200:
return status, None, err
fields.update(data_persistence=dp)
# instantiate scheduler object
if 'scheduler' in data:
status, scheduler, err = Scheduler.parse(data.pop('scheduler', {}), from_user)
if status != 200:
return status, None, err
fields.update(scheduler=scheduler)
return 200, Appliance(**fields, **data), None
