Testing purposes post
June 20, 2026
Buffering is used to temporarily store data while it is being moved from one place to another.
- technology
- testing
Johnny Hashoul
I'm Johnny, a software architect focused on scalable distributed systems, clean architecture, and AI-driven engineering. I write about the systems I build and what I learned along the way.
Latest posts
All posts →Modern Microservices Challenges
September 5, 2022
How we built an idempotent, zero-intervention email service that handles millions of requests per hour - state-machine processing, auto-retrying HTTP clients, in-memory backoff, and Kafka retry/DLQ patterns for resilience.
- microservices
- architecture
- kafka
- resiliency
- spring-boot
Dual write and data inconsistency
October 15, 2020
Inserting to the database succeeds but publishing the event fails — and now two systems disagree. A look at distributed transactions, logical transactions, and why the outbox pattern is the right way to avoid dual-write inconsistency.
- microservices
- architecture
- kafka
- data-consistency
- outbox-pattern
Buffering for a better performance
September 20, 2020
Sooner or later a database, web server, or third-party service becomes a bottleneck. Request aggregation through buffering can prevent or minimize the overload — and here's a tiny, simple-to-use Java library to do it.
- performance
- java
- buffering
- rate-limiting
- backend