Recent posts tagged java

Why publishing an event is only the beginning of building a reliable distributed system. Building an event-driven application with Spring Boot is relatively straightforward. You create a Kafka producer, publish an event, implement a consumer, and p...

Security teams are starting to ask a question platform teams don't like: what's our plan for post-quantum encryption? For shops still running Java 8 or 11, the answer has mostly been a shrug. At Oracle AI World in Las Vegas this week, I got a firmer...

Shared storage provides the source of truth. Local caches provide speed. Events help keep cache state in sync. Project: Polar Bear Cache — GitHub repositoryhttps://github.com/babyblue94520/polar-bear-cache In my previous discussions about microser...

Sync Session: Rethinking Session Management in Microservices Project: Sync Session on GitHubhttps://github.com/babyblue94520/sync-session Shared storage provides the source of truth. Local caches provide performance. Events synchronize session sta...

From graph lambdas to action catalogs When building a workflow with LangGraph4j, I usually start with a few nodes and straightforward transitions. As the workflow grows, the graph definition can become crowded with action implementations, configura...

As a backend developer, I spend a lot of time thinking about what happens behind the scenes when someone uses an application. A user clicks a button, submits a form, or requests some information, and the backend has to process that request and return...

A customer clicks Place order. Your API returns success. The order row is in the database. But the service that processes orders never sees an event. This is not a hypothetical edge case invented by Kafka. It is a failure window in a common Spring B...

AI agents are easy to demo and difficult to trust. A developer can connect a language model to a few tools in an afternoon. The first demo looks impressive: the agent reads a request, calls an API, checks a database, and returns an answer. Then pro...

From Writing Web Novels to Shipping Software — Nocklock’s Developer Journey > “I think AI is most useful when it extends my thinking rather than replacing it.” Nocklock didn't originally become a developer because programming was a lifelong childh...

I recently moved my development setup to a new LG gram Pro 17. At first, I was mostly distracted by the laptop itself. It's a 17-inch machine, but it doesn't really feel like one when you pick it up. The screen is huge compared to what I was used ...

As a Java developer, I enjoy building applications that solve real problems, handling complex logic, and exploring how software works behind the scenes. Java is a powerful programming language that helps developers create everything from small applic...

I Built the MVP. Then I Realized Shipping Was a Different Skill. A few days ago, I wrote about something I had learned the hard way: > Building the MVP first and writing the README later made me realize how much I had assumed. I thought that was ...

I did this in the wrong order. At least, that was my first thought. I was building a small project that checks images and documents for privacy risks. The backend came first, then the API, then a frontend that finally made it feel like an actual se...

Part 2: Spring AI + Langfuse: Tracing Streaming with ObservationFilterhttps://dev.to/lbobylev/spring-ai-langfuse-tracing-streaming-with-observationfilter-h3l In this post, we will look at how to connect Spring AI with Langfuse and get complete trac...

Stop building everything manually. Learn how modern Android teams automate their development workflow This series is designed to provide a complete understanding of CI/CD for Android development. In Part 1, we’ll introduce the fundamentals of CI/CD,...

Faker Doesn't Know Your Entities Are Related, So I Built Something That Does You've added a second entity to the schema, wired up a @ManyToOne, and gone back to your seed script to generate fifty more rows. Ninety seconds later, the app refuses to ...

A lot of teams migrated to Java 21 and flipped spring.threads.virtual.enabled=true, expecting instant scaling without the reactive boilerplate. And for basic I/O, it works great. But once high concurrency hits, some services start seeing unexplained...

Starting a new Spring Boot project usually feels great. You create the project, add a few dependencies, write your first controller... Then authentication enters the chat. Suddenly you're configuring: Spring Security JWT access tokens refresh ...

LangGraph4j 1.9.0 is out! LangGraph4j 1.9.0 is out! With the 1.8.x release stream now in LTS, development moves forward on 1.9 with improvements to streaming, persistence, and the infrastructure for building agents in Java. This release is an impo...