S5E26 - dev2Next, Native JSON and a Week of New Models

Join Dan Vega and DaShaun Carter for the latest updates from the Spring Ecosystem. This week is a potluck episode. We're setting the planned topics aside and answering your questions. We'll dig into the new JSON API coming to the JDK and what it means for Jackson. We'll talk about taking Spring AI apps to production, from guardrails to cost control. We'll cover keeping up with CVEs and upgrades, and finish with a lightning round of career questions. Bring your questions to the live chat, or send one ahead of time at springofficehours.io/ask. You can participate in our live stream to ask questions or catch the replay on your preferred podcast platform.Show Notes:Ask a question on springofficehours.io or on GitHub DiscussionsSpring Office Hours MCP serverMCP Security for Spring AI (OAuth for MCP servers and clients)JEP 540: Simple JSON API (Incubator)Spring Boot Actuator: Software Bill of Materials (SBOM) endpointSpring Security: Hierarchical RolesSpring AI: Advisors APISpring AI 2.1.0 RC1 available nowPorto Tech Hub 2026 and J-Fall 2026The show:springofficehours.io - episodes, schedule, communitySpring Developer on YouTube - join us live every MondayDan VegaDaShaun CarterThe Spring Blog - the news we cover each week

Join Dan Vega and DaShaun Carter for the latest updates from the Spring Ecosystem. In this episode, Dan and DaShaun are joined by Java Champion Pratik Patel to talk about Hugging Face for Java developers. Hugging Face hosts over a million open models, but most Java developers have never used one. They discuss what Hugging Face actually is, how to find a model worth using, the ways you can run open models from Java today, and when an open model beats a paid API. You can participate in our live stream to ask questions or catch the replay on your preferred podcast platform.Show Notes:Pratik Patel on X and LinkedInDevnexus 2027Hugging FaceHugging Face Inference EndpointsSpring AI: OpenAI Chat (works with any OpenAI-compatible endpoint)Big Data and AI workshop (Spring Boot, Spring AI, Spark, Iceberg)RTX 5090 vs M5 Ultra: Which AI Powerhouse Wins? (video)Hands-on with Hugging Face Buckets and Xetllama.cppoMLX: LLM inference for Apple SiliconThe show:springofficehours.io - episodes, schedule, communitySpring Developer on YouTube - join us live every MondayDan VegaDaShaun CarterThe Spring Blog - the news we cover each week

Join Dan Vega and DaShaun Carter for the latest from the Spring ecosystem. We’re back from Dev2Next with a recap. Dan shows off two things he built last week. One is Kiln, a warm new theme for IntelliJ. The other is a set of demos for the JSON API coming to JDK 28. Then we dig into a busy week of model releases. Meta released the weights for Muse Spark Open, NVIDIA fit a 74B model into 24GB, and DeepSeek shipped a faster V4.1 Flash. Local inference is getting real, but RAM and VRAM prices keep climbing. We’ll talk about when running models on your own hardware makes sense, and how to point Spring AI at a model on your own machine. We’ll also answer your questions live.Show Notes:dev2next ConferenceSpring AI: There and Back Again (demo code)ArchUnitJEP 540: Simple JSON API (Incubator)Native JSON demos for JDK 28Kiln: a warm theme for JetBrains IDEsSpring AI Evaluation TestingSpring AI Recipes by Craig WallsThe show:springofficehours.io - episodes, schedule, communitySpring Developer on YouTube - join us live every MondayDan VegaDaShaun CarterThe Spring Blog - the news we cover each week

Join Dan Vega and DaShaun Carter for the latest updates from the Spring Ecosystem. In this episode, Dan and DaShaun are joined by the legendary Josh Long. In this episode, we will look into the future of software development. We will also address at least one hot take that recently made the rounds. You can participate in our live stream to ask questions or catch the replay on your preferred podcast platform.Show Notes:Rails World 2026 Opening Keynote - DHHJEP 540: Simple JSON API (Incubator)jfmt: Netflix's formatter for JavaSpring ModulithQwen2.5-Coder 1.5B on OllamaOllama CloudJosh Long on YouTube (Coffee + Software)joshlong.comThe show:springofficehours.io - episodes, schedule, communitySpring Developer on YouTube - join us live every MondayDan VegaDaShaun CarterThe Spring Blog - the news we cover each week

Jev is a new model from TypeSafe that answers typed questions about your content. You send it some text and the decisions you need. It returns a probability, a choice, or a score instead of a paragraph. That makes it a natural fit for the decisions your code already has to make. Is this ticket urgent? Which team should own it? Which model should answer this prompt?In this episode, Dan and DaShaun talk about why this matters for Java and Spring developers. Most of us have been asking a chat model to make a decision and then parsing prose to get the answer out. Jev gives you a typed answer you can branch on, with a confidence you can check. Dan shares what he learned getting it running in Java and Spring Boot, and the two of them talk through where a decision model fits next to Spring AI and where it does not.Then it is your turn. Bring your questions about Jev, Spring Boot 4, Spring AI, or anything else in the Spring ecosystem. We will answer them live.Show Notes:Introducing System One Models & Jev - TypeSafe AI's launch post and the article Dan started with: a decision model, not an LLMSpring AI and TypeSafe Jev: Fast, Cheap, Structured Decisions - Christian Tzolov's post from the morning of the show, with the spring-ai-starter-typesafe dependency, JevJudge, guardrail advisors, and seven runnable examplesspring-ai-typesafe on GitHub - the Spring AI Community project behind that starter: a Java SDK for the Jev API plus the Spring AI integrationsGetting Started with Jev in Java and Spring Boot - Dan's write-up of the single-file Java example and the Spring MVC RestClient versionjev-spring-boot-starter - the Spring Boot 4 starter Dan built over the weekend: RestClient, properties for the API key and model, records for the request and responseHow Spring Boot 4 Starters Actually Work (I Built One for Jev) - Dan's video on building that starterIt's Not an LLM, So What Does It Do? 3 Real Apps I built with Jev - the examples Dan described on the show, including the model router and the real-time writing checksspring-ai-model-router - the Spring AI example where Jev classifies the prompt and picks which model should answer itSpring release calendar - DaShaun's favorite place to check what ships on September 24 and the milestones on the way to Spring Boot 4.2 in NovemberI Publish My Podcast with Claude Code and Skills - Dan's video on replacing this show's editing and publishing workflow with skillsFundamentals of Software Engineering - Dan and Nate Schutta's book, with the career development chapter Dan pointed toS5E23 - Java 27 Release Party with Billy Korando - last week's episodeThe show:springofficehours.io - episodes, schedule, communitySpring Developer on YouTube - join us live every MondayDan VegaDaShaun CarterThe Spring Blog - the news we cover each week

Join Dan Vega and DaShaun Carter for the latest updates from the Spring Ecosystem. In this episode, Dan and DaShaun are joined by Kansas City JUG organizer and Java Developer Advocate, Billy Korando. In this episode, we celebrate the release of Java 27. You can participate in our live stream to ask questions or catch the replay on your preferred podcast platform.Show Notes:JDK 27 - general availability September 15, 2026, with all nine JEPsJava 27 Launch Stream - the Java channel's launch-day replay, with Billy's JFR demo and his interview with Roman KennkeJEP 534: Compact Object Headers by Default - 10 to 20 percent less heap for most workloads, now on by defaultJEP 523: Make G1 the Default Garbage Collector in All Environments - no more silent fallback to Serial GC in small containersJEP 533: Structured Concurrency (Seventh Preview) - the last piece of Project Loom, aiming for final in JDK 28JEP 531: Lazy Constants (Third Preview) - set once, later than final allows, with JIT optimizations to matchJEP 536: JFR In-Process Data Redaction - keeps API keys and passwords out of flight recordings before you hand them to a human or an agentTransitioning Java to more frequent security updates - Oracle's plan to move Java security patches from quarterly to monthly, updated September 10, 2026Project Babylon - code reflection and GPU programming from Java, DaShaun's pick for what to try nextS5E22 - Live from KCDC - last week's episode, recorded at the conference Billy helps organizeBilly Korando on LinkedIn - where Billy says to find himResources:springofficehours.io - episodes, schedule, communitySpring Developer on YouTube - join us live every MondayDan VegaDaShaun CarterThe Spring Blog - the news we cover each week

Join Dan Vega and DaShaun Carter for the latest updates from the Spring Ecosystem. In this episode, Dan and DaShaun broadcast live from the Kansas City Developer Conference, one of the largest community driven developer events in the country. Expect conference highlights, hallway track conversations with speakers and attendees, and the latest news from the Spring and Java worlds. You can participate in our live stream to ask questions or catch the replay on your preferred podcast platform.Show Notes: Craig Walls, Spring AI Recipes indexhabuma/spring-ai-recipes on GitHubSpring AI Recipe: Running Against Local LLMs (Medium)JDK 27 project pageKCDCSpring AI Community on GitHubFundamentals of Software Engineering, danvega.dev

Join Dan Vega and DaShaun Carter for the latest updates from the Spring Ecosystem. In this episode, Dan and DaShaun are joined by returning guest Felipe Gutierrez, co-author with DaShaun of the new book "Pro Spring Boot 4: An Authoritative Guide with Best Practices" from Apress. Felipe and DaShaun discuss what it was like writing the book together and what readers can expect, including Spring Boot 4, Spring Security, GraalVM native compilation, AOT, Testcontainers, and building intelligent applications with Spring AI. You can participate in our live stream to ask questions or catch the replay on your preferred podcast platform.Show Notes:Pro Spring Boot 4 (Apress)Pro Spring Boot 4 on Amazonpro-spring-boot-4 — the book's code examplesCommit Your Code — Sept 2–4, Plano TXKCDC — Sept 9–11, Kansas City

Join Dan Vega and DaShaun Carter for the latest updates from the Spring Ecosystem. In this episode, Dan and DaShaun are joined by Danny Thompson, Senior Developer Advocate at Atlassian, co-host of The Programming Podcast, and founder of The Commit Your Code Conference. Danny is also a co-author of the new No Starch Press book "The Developer's Guide to AI: A Field Guide for the Working Developer." We will talk about his path from a decade in gas stations to a career in software, what it takes to run a conference that donates 100% of ticket revenue to charity, and how working developers can build real AI systems without a data science degree. You can participate in our live stream to ask questions or catch the replay on your preferred podcast platform.Show Notes:The Developer's Guide to AICommit Your Code 2026The Programming PodcastAtlassian ForgeDanny Thompson

Join Dan Vega and DaShaun Carter for the latest updates from the Spring Ecosystem. In this episode, Dan and DaShaun will discuss some of the new features around Docker, Testcontainers and the Spring Boot plugin.You can participate in our live stream to ask questions or catch the replay on your preferred podcast platform.Show Notes:The Java DocumentaryInside Java Podcast 63: Spring AI with Dan VegaClone. Run. Done: Dan's YouTube VideoSpring Boot Docker Compose SupportPaketo BuildpacksShow Resources:springofficehours.io - episodes, schedule, communitySpring Developer on YouTube - join us live every MondayDan VegaDaShaun CarterThe Spring Blog - the news we cover each week