Use the add_watch_callback function to listen key events. If the key is deleted, how to get the value before the key deleted in the callback function of add_watch_callback.
For example:
key：/hello value：1234
delete /hello
Using add_watch_callback how to get 1234 when delete event occurs
Looking forward to your answer, thank you very much
Use the add_watch_callback function to listen key events. If the key is deleted, how to get the value before the key deleted in the callback function of add_watch_callback.
For example:
key：/hello value：1234
delete /hello
Using add_watch_callback how to get 1234 when delete event occurs
Looking forward to your answer, thank you very much