adam bien's blog

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ZMCP implementation details, zero-dependency philosophy, Java 21 exclusive usage, MCP as interface between AI and microservices, ZB build tool convention over configuration, temporary folder for class files, ZCL single-file logger implementation, serverless Kafka consumer with partition-based scaling, S3 bucket with CloudFront for UI hosting, Java LTS vs non-LTS in production, Open Liberty for multi-application deployment, View Transition API browser support, Java Flight Recorder for monitoring, enum implementing interfaces for infrastructure as code, FFM (Foreign Function Memory) for C interop, Quarkus scaling strategies in cloud and on-premise, web standards over frameworks philosophy

and answered questions:

1. ZMCP (Zero-dependency MCP): A Model Context Protocol implementation in pure Java 21 with no external dependencies, featuring code executor, link info tool, and file store tool
2. ZB Build Tool: A lightweight build tool that compiles Java projects in 600ms without Maven dependencies, storing class files in temporary folders by default
3. ZCL (Zero-dependency Colored Logger): A single-file colorful command line logger with exception handling capabilities
4. MCP (Model Context Protocol): Industry standard interface between LLMs/AI and external systems, created by Anthropic
5. Serverless Kafka Consumer Implementation: Using AWS Lambda with MSK (Managed Service Kafka) for event-driven architectures
6. UI Hosting in Serverless: Using S3 bucket with CloudFront distribution for static website hosting
7. Java Version Strategy: Discussion on using Java 24 in production vs waiting for Java 25 LTS
8. Open Liberty vs Quarkus: Use cases for application servers vs cloud-native frameworks
9. View Transition API: New web standard for animations during navigation between views
10. Java Mission Control and Flight Recorder: Monitoring Java applications with pretty UI on-premise

1. Serverless kafka consumer?
2. How to host UI in serverless applications? (S3?)
3. Time machine, 37th episode from April 2017

   Best technology to distribute masterdata diffs, CORS and Access-Control-Expose-Headers, How to implement token based authentication in Java EE?, Monitoring Java EE applications in production (with pretty UI), Tenant-dependent EntityManager injection, Service discovery and Java EE 7, How to build Hateos links with JAX-RS?, Ideas to improve your career, Solutions for mobile applications for Java EE services, What is javax.ws.rs.ext.ContextResolver?, Naming for load balanced microservices, How JTA transactions are implemented under the hood?, Security in Java EE 8 news, Thin WARs in practice, Declarative JSON validation, Microservices and DB sharing, Plain Java SE without Java EE -- is it viable in real world?

4. Why even use Quarkus? Have you tried doing only raw java inside lambda? IMO this should be the standard. Why do we need to have a framework around a the code inside a lambda? I think we should rely on libs, if necessary, not frameworks. DevOps Stage 2024: The Short Way to Serverless NoOps on AWS
5. The use case for enums implementing an interface Enum Implementing an Interface / youtube comment
6. ZCL announcement github.com/adamBien/zcl
7. ZMCP announcement github.com/adamBien/zmcp
8. ZB new feature (temp folder output) github.com/adamBien/zb

Any questions left? Ask now: gist.github.com/AdamBien/480049770946348ce11da42782af850e and get the answers at the next airhacks.tv. Some questions are also answered with a short video: 60 seconds or less with Java

Ask questions during the show via twitter mentioning me: https://twitter.com/AdamBien (@AdamBien),using the hashtag: #airhacks or built-in chat at: airhacks.tv. You can join the Q&A session live each first Monday of month, 8 P.M at airhacks.tv

Subscribe to airhacks.fm podcast via: spotify| iTunes| RSS

Subscribe to airhacks.fm podcast via: spotify| iTunes| RSS

Subscribe to airhacks.fm podcast via: spotify| iTunes| RSS

Subscribe to airhacks.fm podcast via: spotify| iTunes| RSS

Java for CPU-intensive workloads in serverless, no-code approach for I/O-bound operations, Step Functions for waiting operations, Event Bridge for transformations, Service Loader for plugin architecture, Entity Control Boundary package structure, Minimalistic Java applications, Start with Java SE then extend to MicroProfile, Quarkus for fastest runtime, HTTP Client from Java 11 instead of MicroProfile REST Client, Avoid distributing systems prematurely, REST for synchronous communication, Message queues for fire-and-forget, Kafka as a database with forever retention, System.out.println for Lambda logging, Web Components for UI development, Docker layering for Quarkus optimization, MCP comprises prompts resources and tools, 180ms build time for simple projects, 800ms for larger projects with ZB

and answered questions:

1. CloudLand Conference Report: Delivered a 1.5-hour session on "Hardcore Serverless and Serviceful Java" focusing on using Java for CPU-intensive workloads
2. Zero Dependencies Builder (ZB): Open-sourced tool for building Java projects without external dependencies, creates executable JARs automatically
3. Zero Dependencies Model Context Protocol (ZMCP): Implementation of MCP (Model Context Protocol) for connecting LLMs with enterprise infrastructure
4. Minimal Java Applications: Best practices for building lean Java applications starting with Java SE, then extending to MicroProfile/Jakarta EE
5. Consulting Career Advice: How to start as a consultant, focusing on code reviews, migrations, and project design
6. Large-Scale Systems Design: Avoiding premature distribution, using REST for synchronous communication, and message queues for async
7. Quarkus vs Spring Boot: Discussion on framework choice, hot reload capabilities, and startup times
8. Serverless Logging: Using System.out.println for AWS Lambda with CloudWatch integration
9. Database Connection Management: Using PgBouncer or RDS Proxy for serverless environments
10. UI Stack Options: Recommending Web Components and custom elements for modern frontends

1. how to write minimal Java applications
2. CloudLand conference report
3. about consulting
4. Zero Dependencies Builder: zb announcement
5. Zero Model Context Protocol: zMCP announcement
6. Large scale software systems
7. Time travel, topics from the 36th episode:

   HA Singletons and Java EE, JMS-redelivery in the case of a rollback or system failure, Decisions for hosting Java EE projects on premise or in the cloud, Messaging systems and message ordering, Where to put cross-cutting classes in the Boundary-Control-Entity structure?, Deploying a single WAR into separated subfolders, How to deal with "useful" libraries in Thin WAR environments?, Test coverage of system tests, JSON-P vs JSON-B, How to separate environments in Java EE?, UI-stack options in modern Java EE applications, How to manage database connections with TomEE and Docker?, What is @javax.inject.Singleton?, Swagger integration and Jersey or: how to document REST, Field validation in JavaFX and FXML, Do we have to override: getClasses/getSingletons of the javax.ws.rs.core.Application class?

Any questions left? Ask now: gist.github.com/AdamBien/8d9aaeb0af5e612de22796225fee4cab and get the answers at the next airhacks.tv. Some questions are also answered with a short video: 60 seconds or less with Java

Ask questions during the show via twitter mentioning me: https://twitter.com/AdamBien (@AdamBien),using the hashtag: #airhacks or built-in chat at: airhacks.tv. You can join the Q&A session live each first Monday of month, 8 P.M at airhacks.tv

Subscribe to airhacks.fm podcast via: spotify| iTunes| RSS

Subscribe to airhacks.fm podcast via: spotify| iTunes| RSS

Subscribe to airhacks.fm podcast via: spotify| iTunes| RSS

1. AWS User Group Silesia: Hardcore Serverless Java
   session AWS User Group Silesia Future Processing, Gliwice 24 June 2025
   https://www.meetup.com/airhacks/events/308303637/
2. CloudLand: Hardcore Serviceful + Serverless Java #slideless
   session CloudLand Heide Park Soltau 2 July 2025
   https://meine.doag.org/events/cloudland/2025/agenda/#agendaId.5738
3. LLM / GenAI Patterns, Architectures and Use Cases with Java[online event]
   airhacks.live workshop 10 July 2025
   https://airhacks.live
4. Hardcore Serverless Java on AWS[online event]
   airhacks.live workshop 17 July 2025
   https://airhacks.live
5. airhacks.tv Questions and Answers #livestream[online event]
   live streaming show first monday of the month, 8pm CET
   https://www.meetup.com/airhacks/

Subscribe to airhacks.fm podcast via: spotify| iTunes| RSS

Subscribe to airhacks.fm podcast via: spotify| iTunes| RSS

ZB (Zero Dependency Builder) is a simple build tool for Java without external dependencies, Main branch only development works well for most enterprise projects but not when releases are dictated by law, Load balancers like HAProxy and Nginx are recommended for on-premise while cloud load balancers are good for global distribution, JSON-P is a simple way to handle JSON in Java applications, Entity mapping can be done with direct serialization or through DTOs depending on API versioning needs, EJBs can be faster than RequestScoped beans due to object pooling and graph reuse, Quarkus deploys at build time and performs tree shaking for better performance and security, Native images make sense for on-premise deployments but not necessarily for cloud/serverless, AI tools are useful when you can quickly evaluate and accept/reject suggestions, Trunk-based development avoids merge conflicts and keeps the codebase in a functional state, Virtual threads make reactive programming less necessary

and answered questions:

1. Why should you use static method in an interface why not just use a class?
2. How are you using AI tools like copilot or cursor?
3. What is a good load balancer?
4. How would you map in a project that use BCE an entity post from block?
5. How would you do if you want a different request for the creation for the post as well?
6. Would you create the attribute names with static strings?
7. Are you aware of JSON-P being brought into the JDK?
8. Would you like to update the benchmark about request scoped and EJBs?
9. Do you use native images? Why or why not?

Ask questions during the show via twitter mentioning me: https://twitter.com/AdamBien (@AdamBien),using the hashtag: #airhacks or built-in chat at: airhacks.tv. You can join the Q&A session live each first Monday of month, 8 P.M at airhacks.tv

1. Meet zb (zero dependencies builder)
2. Request for recommendations for load balancer tools for on-premise applications, with previous GSLB experience being limited compared to cloud-based solutions and seeking more feature-rich alternatives.
3. Use DTOs like PostDto in the Boundary layer for responses to avoid exposing entire JPA entities, and utilize separate DTOs like CreatePostDto for handling creation requests.
4. Boundary layer manages interaction between application and external systems, handling requests and responses using appropriate DTOs.
5. Managing CI/CD and collaboration with multiple people using only the "main" branch workflow.
6. Comparing RequestScoped and EJB performance in Quarkus, questioning necessity of waiting for "EJB Replacement" for performance optimization.
7. Discussion on whether RequestScoped is currently sufficient without optimizations like pooling and max concurrency that are only available in EJB.
8. Payara's startup and deployment speed now comparable to Quarkus thanks to Project Leyden and JDK 24 improvements.
9. Java's overall performance enhancement with JDK 24 reduces performance gap between Quarkus and other Java frameworks.
10. Project Leyden makes reflection no longer a performance bottleneck, benefiting all Java applications.
11. Introduction of jtaccuino project - a Jupyter notebook written in JavaFX providing an alternative to Python for datascience.
12. time travel, topics form the 35th episode:

    Java EE 8 News, Java SDK for Oracle Bare Metal Cloud Services, Handling JPA relationships in CRUD microservice scenarios, The role of RxJava in typical enterprise applications, JAX-RS returning Response vs objects and JSON vs XML, Cross-field entity validation, GPL/LGPL opensource and commercial projects, What is pac4j.org, Transactions CRUD-Services BCE EntityManager and connection sharing, SCM Managing Structuring and organizing microservices, Gradle adoption gradle vs maven, Dealing with setup scripts in Java EE environment, Oracle JDK vs openJDK and licensing, Greetings from Panama jmoordb, The role of Model Driven Architecture in Java EE

Any questions left? Ask now: gist.github.com/AdamBien/74fcde9b08475112003c772ed8384462 and get the answers at the next airhacks.tv. Some questions are also answered with a short video: 60 seconds or less with Java

Ask questions during the show via twitter mentioning me: https://twitter.com/AdamBien (@AdamBien),using the hashtag: #airhacks or built-in chat at: airhacks.tv. You can join the Q&A session live each first Monday of month, 8 P.M at airhacks.tv

Subscribe to airhacks.fm podcast via: spotify| iTunes| RSS

Subscribe to airhacks.fm podcast via: spotify| iTunes| RSS

Subscribe to airhacks.fm podcast via: spotify| iTunes| RSS

Subscribe to airhacks.fm podcast via: spotify| iTunes| RSS

"This interactive session is about practical, no-nonsense coding. We'll explore lean Java 21+ practices and patterns that eliminate bloat and hacks that increase productivity. We will start with structuring and organizing backend monoliths and microservices, cover testing, then move on to decoupling, abstractions, Data Oriented Programming, automation with pure Java."

I used the following example during the session ebank. As a quickstarter for serverless / AWS production projects, I'm using the following template: aws-quarkus-lambda-cdk-plain