def on_every_second():
'''
@summary: function called by tornado/ioloop every second
It's used to clear expired locks
'''
LOCK_MANAGER_INSTANCE.clean_expired_locks()
print("chicking expired locks.\n")
def get(self):
'''
@summary: deals with GET request (getting a JSON HAL of resources)
'''
resources = Resource(self.reverse_url("resources"))
resources_names = LOCK_MANAGER_INSTANCE.get_resources_names()
for resource_name in resources_names:
tmp = LOCK_MANAGER_INSTANCE.get_resource_as_dict(resource_name)
resource = Resource(self.reverse_url("resource", tmp['name']),
{"name": tmp['name']})
resources.add_embedded_resource("resources", resource)
self.set_header("Content-Type", "application/hal+json")
self.finish(resources.to_json())
def post(self, name):
'''
@summary: deals with POST request (acquiring locks on resource)
@param name: name of the resource
'''
raw_body = self.request.body.decode('utf-8')
if len(raw_body) == 0:
self.send_error(status_code=400, message="empty body")
return
lock = Lock.from_json(name, raw_body)
if not (lock):
self.send_error(status_code=400, message="invalid json body")
return
lock.set_callbacks(
functools.partial(self.on_active_wrapper, name, lock),
self.on_delete_wrapper)
LOCK_MANAGER_INSTANCE.add_lock(name, lock)
def delete(self, name):
'''
@summary: deals with DELETE request (deleting the given resource)
@param name: name of the resource
'''
res = LOCK_MANAGER_INSTANCE.remove_resource(name)
if res:
self.send_status(204)
else:
self.send_error(404, message="no resource (with locks) found")
def delete(self, name, uid):
'''
@summary: deals with DELETE request (releasing a lock)
@param name: name of the resource
@param uid: uid of the lock
'''
res = LOCK_MANAGER_INSTANCE.delete_lock(name, uid)
if res:
self.send_status(204)
else:
self.send_error(status_code=404, message="lock not found")
return
def get(self, name):
'''
@summary: deals with GET request (getting a JSON HAL of the resource)
@param name: name of the resource
'''
tmp = LOCK_MANAGER_INSTANCE.get_resource_as_dict(name)
resource = Resource(self.reverse_url("resource", name), {"name": name})
if tmp:
for lock_dict in tmp['locks']:
lock = Resource(
self.reverse_url("lock", name, lock_dict['uid']),
lock_dict)
resource.add_embedded_resource("locks", lock)
self.set_header("Content-Type", "application/hal+json")
self.finish(resource.to_json())
def get(self, name, uid):
'''
@summary: deals with GET request
@param name: name of the resource
@param uid: uid of the lock
'''
lock = LOCK_MANAGER_INSTANCE.get_lock(name, uid)
if lock:
self.set_header('Content-Type', 'application/hal+json')
hal_lock = Resource(href=self.reverse_url("lock", name, lock.uid),
properties=lock.to_dict())
hal_resource_link = Link(href=self.reverse_url("resource", name))
hal_lock.add_link(rel="resource",
link=hal_resource_link,
multiple=False)
self.write(hal_lock.to_json())
else:
self.send_error(status_code=404, message="lock not found")
return
def delete(self):
'''
@summary: deals with DELETE request (deleting all resources)
'''
LOCK_MANAGER_INSTANCE.remove_all_resources()
self.send_status(204)