Friends of OpenJDK Today

Table of Contents What Are Docker Official Images, and Why Does It Matter?The Journey: Two Years in the MakingHow Azul Zulu Official Images Are Built and PublishedPre-release validationPM approval and promotionSubmitting to Docker HubWhat’s Changing: From Docker Hub to Docker …

Table of Contents Prerequisites1. Data model2. Project setup3. Building the content-based recommendation engineUserProfileControllerGameRepositoryRecommendationService core logicRecommendationControllerManual test4. User ratings and affinity adjustmentRatings endpointAffinity adjustment logicMongoDB updateBefore and after demo5. Adding Spring AI embeddings and MongoDB Atlas Vector SearchSpring AI setupGenerating embeddingsDataSeeder …

Table of Contents 🏗️ The Middleware Architecture🎯 AiMiddlewareResult — Typed Flow Control📝 LoggingMiddleware — Instant Observability🔁 RetryMiddleware — Resilience Without Boilerplate🛡️ GuardrailMiddleware — Defense in Depth🙋 HumanInTheLoopMiddleware — Keeping Humans in Control🎙️ FlightRecorderMiddleware — AI Testing Solved🔢 MaxToolCallsMiddleware — Runaway …

Table of Contents Why Do Flaky Tests Matter?Common Causes of Flaky TestsStrategies to Keep Tests Reliable1. Awareness of Flaky Tests2. Fix One Flaky Test Each Sprint3. Use New Test Data4. Wait for Conditions to Be Met5. Run Tests in Parallel6. …

Table of Contents The Quarterly Update CycleCritical Patch Updates (CPU)Patch Set Updates (PSU)Making Perfect Use of CPU and PSU releasesDifference With the Six-Month Release CycleSecurity and Bug Fixes in This ReleaseAzul Zulu April 2026 Release NotesAzul Zulu Joins Docker’s Official …

Table of Contents Why Cache Invalidation Becomes Hard in Distributed SystemsTime-Based Expiration (TTL)The Cache-Aside PatternEvent-Based Cache InvalidationVersioned Cache KeysMulti-Layer CachingEvent-Driven Cache RebuildsChoosing the Right StrategyFinal Thoughts Caching is one of the most powerful tools developers have at their disposal for …

Table of Contents 🌲 The Agent TreeCycle Detection Built-In🤖 Sub-Agents as Tools🏢 AiAgent is Now Fully Stateless🧠 Per-Call Identity Routing on Memory🏗️ The Agent Run Lifecycle🌊 Streaming with Multi-Agent Teams🔄 Suspend and Resume🔍 Introspection🚀 A Complete Multi-Agent ExampleWhat’s Next BoxLang …

Table of Contents What Is MelodyMatrix?What Is jDeploy?The Video: Preparing and Triggering the First Release TogetherWhy jDeploy, and Why It Is FreeA Side Note on Lottie4JTimelineLinks Some side projects take a while to get to a proper release. MelodyMatrix is …

Table of Contents IntroductionRole of Agentic AI FrameworksWhat is Spring AI and Spring AI SDK?What is Amazon Bedrock AgentCore and Why?Amazon Bedrock AgentCore Capabilties1. AgentCore Runtime2. AgentCore Memory3. AgentCore Gateway4. AgentCore Identity5. AgentCore Policy6. Build-inTool: Code Interpreter7. Build-inTool: Browser8. Gen …

Table of Contents The CVE Blind SpotThe River StyxThe Rules Changed. The Habits Didn’t.What This Looks Like in PracticeWhen Dependencies Become ZombiesSpring Boot 3.5: The Next CrossingWe’ve Seen This Film BeforeThe Window Is Open. For Now.The Map, Not Just the …

Table of Contents TLDRIntroOpenJDKEclipse TemurinLiberica JDKAzul ZuluAmazon CorrettoIBM Semeru RuntimesRed Hat OpenJDKSapMachineMicrosoft Build of OpenJDKMaking the Call TLDR Intro Picking a Java runtime is like picking any commodity infrastructure, isn’t it? You simply find the version you need and grab …

Table of Contents Agents everywhereRod Johnson on the roadThe sessions that didn’t get the main stageA few things from the HeroDevs cornerThe documentaryWhat I’m taking home Spring I/O 2026 wrapped in Barcelona on Wednesday. Three days at the Palau de …