expr/disable worker

[stanley2058]

Move worker duty into socket io server.

Pros:

• No unnecessary Redis stream
  • The current worker is based on a polling mechanism, which leads to inefficiency
  • Now we don't have to recreate the ydoc in different places several times
• Reactive stream processing
  • Now Redis stream operations for room happen only on update instead of worker polling
  • No pending task and stream entry accumulation

Cons:

• Pressure on socket io server would be higher
• Due to caching, expected memory usage would be higher

Others:

• Implementing heavy caching in the server to avoid unnecessary operation as much as possible
  • Authentication result is now cached for 1m
  • Server now maintains a copy of ydoc

[stanley2058]

Please try to handle SIGTERM, SIGINT, SIGQUIT and uncaughtException, unhandledRejection. Some message from worker and std output should be logged in order to debug.

Due to storage not being managed here, the worker is created externally and passed in. Thus, status handling should also be handled externally where the worker is created.