Concurrency control in RDB
Concurrency control in RDB Optimistic lock vs Pessimistic lock
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2024
Distributed Locking with Redisson
Distributed Locking with Redisson
MySQL Auto-Inremented PK
Why use MySQL auto-incremented values as primary keys?.
Async programming in JAVA
Async programming in JAVA with CompletableFuture.
Test code for SpringBoot multi-module with Redis
Test code environment in SpringBoot multi-module project with Redis utilized in a child module.
How to collect JVM heap dump in Kubernetes
Having trouble collecting JVM heap dump from Kubernetes? You need to use PV(Persistent Volume) to keep data since volumes are ephemeral in Kubernetes. If yo...
How to make docker build time faster
Having trouble with long build time of your docker image? Waiting for a long build time is quite difficult to tolerate. When you are building a docker image...
2023
Design of chatting system with Websocket, RDB, and Redis
How I designed chatting system with Websocket, RDB, and Redis Objectives : The chatting message should be sent through Websocket STOMP and saved to the da...
Static serving SPA with CloudFront
Connecting domain to cloudfront with route53 It is possible that your cloudfront is not shown on the list when you trying to connect your domain using AWS...
Prometheus JVM Spring metric
How to get centralize JVM & Spring metric using Prometheus Amazon managed prometheus and grafana might be a good option for monitoring when you are AWS E...
Cannot access SunJCE error in JDK11 above
SunJCE error when using it in JDK 11 or above. How to solve it when using Jib I faced error below when I migrated from dockerfile to jib. java.lang.IllegalAc...
Minikube nginx ingress local setup
Minikube nginx ingress on local mac I was using minikube on mac trying to local test. I faced problem accessing local ingress after I set up. My configuratio...
Permission denied when using docker command in Docker Desktop for mac
Permission denied using docker command in mac I was using Docker Desktop for mac with intel chip. When I tried to build docker image, I faced error message b...
An error when installing jenkins on Amazon Linux
An error when installing jenkins on Amazon Linux based EC2 I faced following error when I tried “sudo yum install jenkins” ... You can remove cached packages...
ElastiCache with keyspace event
Problems when using ElastiCache with keyspace event faced this error when I tried to use notify-keyspace-events option in spring data redis. Caused by: org.s...
2022
DB Isolation Level
What is isolation level? Isolation describes how changes applied by concurrent transactions are visible to each other. There are four types of isolation...