Long time ago, I was doing resilience review for an application and figured that the shutdown hook was not executed by the application when the pod is deleted in Kubernetes, even though it had enough time to shutdown gracefully — defined by terminationGracePeriodSeconds Only explanation is that the SIGTERM sent…

I went through quite a bit of struggle to decode how to add custom plugin to protoc. In this article, I will introduce protocol buffer’s insertion points — which is hidden deep in the documentation, and how these are the key to write custom code generation for protos. The “Why” Only primitives…

I was working on a POC in an application to trigger runs which would update status tables at both Postgres and SqlServer. Well, it was more than that but that is the problem statement I am going to focus on for this post. We were using Spring batch for job…

I have not seen in-process schedulers used widely. There is usually a dedicated application that is built solely for the purpose of scheduling and maintaining job runs. That way, there is only one application that focuses on scheduling, holding the job runs, monitoring and alerting after x failures, enabling/disabling a…

I was playing around with Flyway and Spring boot recently. The repo here answers all basic questions like : What is Flyway? How does Flyway integrate with spring boot? How to maintain backward compatibility? How does Flyway rollback changes when a migration fails? In this post I will elaborate few…

I had signed up as a Mentor for a pilot program based on Experiential Learning to mentor a group of 5 people on technology that they have never used —Apache Kafka 🙌 The key was to give a scenario — which is not too hard to setup — and guide…

A good way to dive in-depth with any technology/framework is actually to try out every essential feature yourself. If you want to learn Spring Framework and do not know where to start, here is the material to get you started. I have formulated recipe based training — each recipe is a mini project focused on a particular problem and a feature to address that. I ran this programme for a small group of newbies. It was a huge hit! This also helped keep the training async considering the current covid situation.

If you haven’t already my blog on building serverless slack bot, do give it a read here Couple weeks back, I built a slack app to conduct “The Virtual Treasure Hunt” for my team. The COVID lockdown has got us all working remotely with no interactions except for few work-related…

Few weeks back, I built a slack bot for the team which gives sassy replies when someone says “/hi”. The idea came from my colleague when he talked about an email bot when cc’ed, randomly updates the mail thread with funny things that his manager usually says. …