Spring Boot

A record of using LiveKit SendData in the GRIT real-time video study platform to send emoji reactions and Pomodoro timer state inside a room.

A record of tracing why JWT authentication filter errors in GRIT were returned as Tomcat 500 errors instead of the common API error response, and how I handled exceptions based on where they occurred.

A record of preparing basic monitoring for GRIT by collecting and checking metrics and logs with Spring Actuator, Prometheus, Loki, and Grafana.

A record of using Redis Pub/Sub in UniSchedule to solve a problem where chat messages were not delivered to some users in a multi-instance environment.