Redis distributed lock to be continued

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In order to ensure the final consistency of data , Use Redis Distributed lock
When multiple processes are not in the same system , Using distributed lock to control the access of multiple processes to resources .

Features of locks

First , To ensure that distributed locks are available , We should at least ensure that the implementation of the lock meets the following four conditions at the same time ：

1、 Mutual exclusivity ： Anytime , Only one client can acquire the lock , You can't have two clients acquire locks at the same time .

2、 Security ： The lock can only be deleted by the client holding the lock , Cannot be deleted by other clients .

3、 Deadlock ： The client that gets the lock for some reason （ Such as down Machine, etc ） And failed to release the lock , Other clients can no longer acquire the lock .

4、 Fault tolerance ： When some nodes （redis Nodes etc. ）down operation period , The client can still acquire and release locks .

Please correct me if there is any mistake