--- title: Best Foojay.io posts — December 2025 | daily.dev description: The most upvoted Foojay.io posts from December 2025, curated by the daily.dev community. canonical: https://daily.dev/sources/foojayio/best-of/2025/12 twitter:card: summary_large_image twitter:site: @dailydotdev og:url: https://daily.dev/sources/foojayio/best-of/2025/12 og:type: website og:site_name: daily.dev og:title: Best Foojay.io posts — December 2025 | daily.dev og:description: The most upvoted Foojay.io posts from December 2025, curated by the daily.dev community. og:image: https://media.daily.dev/image/upload/s--VAY5ToZt--/f_auto/v1724209435/public/daily.dev%20-%20open%20graph --- # Best of Foojay.io — December 2025 1. 1 [](https://daily.dev/posts/building-systems-that-know-why-they-exist-when-data-logic-and-intent-finally-align-td3rifdtx "Building Systems That Know Why They Exist ~ When Data, Logic, and Intent Finally Align") Article Foojay.io · 40w Building Systems That Know Why They Exist \~ When Data, Logic, and Intent Finally Align Requirements-as-Code (RaC) is an engineering discipline that treats requirements and business rules as executable data models rather than static documentation. By storing requirements as structured, versioned data in systems like MongoDB, software can maintain a living connection to its original intent throughout its lifecycle. This approach enables systems to interpret documented purpose at runtime, validate behavior against intent, and maintain semantic alignment between what software does and what it was meant to do. When combined with AI for natural language compilation, RaC creates systems that don't just execute code but understand why they exist. 48 2. 2 [](https://daily.dev/posts/java-25-what-s-new--9ailst9zb "Java 25: What’s New?") Article Foojay.io · 40w Java 25: What’s New? Java 25 is the new Long-Term Support release featuring 18 JEPs. Key additions include PEM format support for cryptographic objects, Stable Values API for lazy initialization, JFR enhancements with CPU-time profiling and method timing/tracing, and improved AOT capabilities with method profiling. Several preview features graduate to standard including Scoped Values, Module Import Declarations, and Compact Source Files. The release removes 32-bit x86 support and includes performance optimizations like improved String hashcode handling and new security algorithms. 32 2 3. 3 [](https://daily.dev/posts/opentelemetry-guide-gk7sxbvat "OpenTelemetry Guide") Article Foojay.io · 39w OpenTelemetry Guide Spring Boot 4 introduces native OpenTelemetry support through a single starter dependency, simplifying observability implementation. The guide covers configuring metrics, traces, and logs using the OTLP protocol, including step-by-step setup with Micrometer integration, Logback appender configuration, and Docker Compose testing with Grafana. This eliminates the need for multiple dependencies and Java agents required in Spring Boot 3, while providing seamless integration with GraalVM and AOT compilation. 10 [See all Foojay.io archives](/sources/foojayio/best-of) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@graph":[{"@type":"CollectionPage","@id":"https://daily.dev/sources/foojayio/best-of/2025/12#page","url":"https://daily.dev/sources/foojayio/best-of/2025/12","name":"Best Foojay.io Posts — December 2025","description":"The most upvoted Foojay.io posts from December 2025, curated by the daily.dev community.","isPartOf":{"@type":"WebSite","url":"https://daily.dev"}},{"@type":"ItemList","@id":"https://daily.dev/sources/foojayio/best-of/2025/12#items","numberOfItems":3,"itemListElement":[{"@type":"ListItem","position":1,"url":"https://daily.dev/posts/building-systems-that-know-why-they-exist-when-data-logic-and-intent-finally-align-td3rifdtx","name":"Building Systems That Know Why They Exist ~ When Data, Logic, and Intent Finally Align"},{"@type":"ListItem","position":2,"url":"https://daily.dev/posts/java-25-what-s-new--9ailst9zb","name":"Java 25: What’s New?"},{"@type":"ListItem","position":3,"url":"https://daily.dev/posts/opentelemetry-guide-gk7sxbvat","name":"OpenTelemetry Guide"}]},{"@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Sources","item":"https://daily.dev/sources"},{"@type":"ListItem","position":3,"name":"Foojay.io","item":"https://daily.dev/sources/foojayio"},{"@type":"ListItem","position":4,"name":"Best of","item":"https://daily.dev/sources/foojayio/best-of"},{"@type":"ListItem","position":5,"name":"December 2025"}]}]} ```