| --Copyright 2021 The casbin Authors. All Rights Reserved. |
| -- |
| --Licensed under the Apache License, Version 2.0 (the "License"); |
| --you may not use this file except in compliance with the License. |
| --You may obtain a copy of the License at |
| -- |
| -- http://www.apache.org/licenses/LICENSE-2.0 |
| -- |
| --Unless required by applicable law or agreed to in writing, software |
| --distributed under the License is distributed on an "AS IS" BASIS, |
| --WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| --See the License for the specific language governing permissions and |
| --limitations under the License. |
| |
| local Watcher = {} |
| Watcher.__index = Watcher |
| |
| -- setUpdateCallback sets the callback function that the watcher will call |
| -- when the policy in DB has been changed by other instances. |
| -- A classic callback is Enforcer:loadPolicy(). |
| function Watcher:setUpdateCallback(func) |
| |
| end |
| |
| -- update calls the update callback of other instances to synchronize their policy. |
| -- It is usually called after changing the policy in DB, like Enforcer:savePolicy(), |
| -- Enforcer:AddPolicy(), Enforcer:RemovePolicy(), etc. |
| function Watcher:update() |
| |
| end |
| |
| -- close stops and releases the watcher, the callback function will not be called any more. |
| function Watcher:close() |
| |
| end |
| |
| return Watcher |
