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Java Articles by Foojay.io

October, 2025

  • 24 October

    Leading the Way: Payara Platform Community 7 Beta Now Fully Jakarta EE 11 Certified

    Author: Dominika Tasarz Original post on Foojay: Read More Table of Contents Why Jakarta EE 11 Certification Matters for Payara UsersNot a Payara Platform Community User? No Problem!Jakarta EE 11: The Future of Enterprise JavaJakarta EE 11 Certification AvailabilityPayara’s Role in the CommunityWhat’s Next We’re excited to announce that Payara Platform Community 7 Beta application server is now fully certified …

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  • 23 October

    Beyond Keywords: Optimizing Vector Search With Filters and Caching (Part 2)

    Author: Ricardo Mello Original post on Foojay: Read More Table of Contents Adding filters: From story to code First try: Add a post-filter in MovieService Second try: Use a pre-filter Refining the search with extra filters Applying toCriteria() in the search Reducing embedding costs with caching Strategy with @Cacheable A minimal frontend Step 1: HTML Step 2: JavaScript Step 3: …

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  • 21 October

    The Cost of Not Knowing MongoDB – Part 2 (appV5R0 to appV5R4)

    Author: Artur Costa Original post on Foojay: Read More Table of Contents Application Version 5 Revision 0 and Revision 1 (appV5R0 and appV5R1): A simple way to use the Bucket Pattern Schema Bulk upsert Get reports Indexes Scenario Load tests results Issues and improvements Application Version 5 Revision 2 (appV5R2): Using the Bucket Pattern with the Computed Pattern Schema Bulk …

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  • 21 October

    Transactions and ThreadLocal in Spring

    Author: Nicolas Frankel Original post on Foojay: Read More Table of Contents Finding usage of ThreadLocalThe TransactionSynchronizationManager classHow transactions use TransactionSynchronizationManagerWhat about Reactive transaction management?Discussion Two years ago, my friend José Paumard held the talk “Concurrent and Asynchronous Programming : Loom” at the Geneva Java User Group. In his talk, he mentioned that the Spring team would need to completely …

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  • 20 October

    Foojay Podcast #80: AI4Devs Interviews – Part 2

    Author: Frank Delporte Original post on Foojay: Read More Table of Contents VideoPodcast (Audio only)Content This is part 2 of the interviews recorded on September 19th, 2025, at the first AI4Devs conference in Amsterdam. In Part 1, we explored many AI-related topics as libraries, security, infrastructure, use cases, and more. In this second part, we’ll dive into data science, tools …

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  • 16 October

    Beyond Keywords: Implementing Semantic Search in Java With Spring Data (Part 1)

    Author: Ricardo Mello Original post on Foojay: Read More Table of Contents The magic behind vector searchPrerequisitesEmbeddings with Voyage AIPreparing the datasetMongoDB Atlas Vector Search (index and retrieval)Building the movie search app Configuring the application The document model Wire the request DTO Communicating with Voyage AI The EmbeddingService Querying with Spring Data Vector Search operation The MovieController Running the application …

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  • 16 October

    How Chat Memory Manipulation Can Ruin Your AI System

    Author: Brian Vermeer Original post on Foojay: Read More Table of Contents Do LLMs have any conversational memory?Implementing chat memory in your AI app Chat messages with Java’s Langchain4J LLM chat memory injection Chat memory injection: Proof of concept Preventing chat memory manipulation is key Do LLMs have any conversational memory? With the use of ChatGPT, Claude, and Copilot, we …

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  • 15 October

    7 Habits of Highly Effective Java Coding

    Author: Jonathan Vila Original post on Foojay: Read More Table of Contents From AI User to AI Pro 1. The Golden Rule: Take Pride and Ownership in Your Craft 2. Feed the Beast: Your Project’s Context is its Fuel 3. Dodge the “Ball of Mud”: Keep Your Code Maintainable 4. Clean Your Room: No Stray Code or Sketchy Dependencies 5. …

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  • 14 October

    The Cost of Not Knowing MongoDB – Part 1: appV0 to appV4

    Author: Artur Costa Original post on Foojay: Read More Table of Contents The application: finding fraudulent behavior in transactionsThe load testInitial scenario and data generatorThe instances configurationApplication Version 1 (appV1) Schema Bulk upsert Get reports Indexes Initial scenario stats Load test results Issues and improvements Application Version 2 (appV2) Schema Bulk upsert Get reports Indexes Initial scenario stats Load tests …

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  • 14 October

    JC-AI Newsletter #7

    Author: Miro Wengner Original post on Foojay: Read More Fourteen days have passed, and it is time to present a fresh collection of readings that could influence developments in the field of artificial intelligence. Beyond focused tutorials that can enhance your understanding of AI applications, this newsletter concentrates on Hallucination, Java Code Generation, Testing, Agentic System Architecture and LLM benchmarking …

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