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From Monolith to Microservices: Why I Redesigned Finovara's Architecture - Finovara
At some point, a monolith starts working against you. In my case, Finovara was a single Spring Boot application handling everything (authentication, transactions, limits, piggy banks, notifications, activity logs, currency conversion) The bigger it got, the harder it was to change anything without worrying about something else breaking. So I broke it apart. This post is about the first three pieces I extracted: the API Gateway , the activity-log-backend , and a shared module called contracts-backend . The Old Structure Everything lived in one Spring Boot app. The activity log — which tracks everything a user does in the app (expenses added, limits changed, logins, account changes) — was tangled up with the core business logic. Adding a new type of activity meant touching the same codebase responsible for transactions, security, and everything else. The New Structure finovara-backend/ ├── api-gateway/ ├── activity-log-backend/ ├── contracts-backend/ └── core-backend/ Four modules (there will be more). Each with a clear responsibility. API Gateway The gateway is the single entry point for every request coming from the frontend. It runs on port 8888 with SSL enabled and uses Spring Cloud Gateway (WebFlux-based). Routing is simple and declarative: routes : - id : activity-log-backend uri : ${ACTIVITY_LOG_URL} predicates : - Path=/api/account-activity/**,/api/archive-activities/** - id : notification-backend uri : ${NOTIFICATION_BACKEND_URL} predicates : - Path=/api/notification-settings/** - id : core-backend uri : ${CORE_BACKEND_URL} predicates : - Path=/** Activity log routes go to activity-log-backend . Notification routes go to notification-backend . Everything else falls through to core-backend . The gateway also handles CORS centrally — https://localhost:5173 is the only allowed origin, with credentials support. No individual service needs to worry about CORS anymore. One thing worth noting: the gateway uses use-insecure-trust-manager: true for the HTTP client. Th
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Why EIA-96 SMD Resistor Codes Don't Match Their Resistance Values
The first time I encountered an EIA-96 resistor , I assumed the marking would tell me the resistance value directly. I was troubleshooting a PCB and found a resistor marked 24C . Naturally, I expected some relationship between "24" and the actual resistance. After measuring and checking the datasheet, I discovered the resistor was 17.4 kΩ . That raised an obvious question: Why doesn't the code match the resistance value? The Problem With Traditional SMD Codes Most electronics enthusiasts learn resistor markings through familiar examples: 103 = 10 kΩ 472 = 4.7 kΩ 681 = 680 Ω These markings are straightforward. The first digits are significant figures and the last digit is a multiplier. The system works well for common resistor values, especially 5% tolerance components. However, things become complicated when manufacturers need to identify large numbers of precision resistor values on extremely small packages. Enter the EIA-96 Series Precision resistors often use the E96 preferred value series. Instead of having only a handful of values per decade, the E96 series contains 96 standardized resistance values between powers of ten. Some examples include: 100 Ω 102 Ω 105 Ω 107 Ω 110 Ω 113 Ω Notice how closely spaced these values are. Trying to represent all of them with traditional three-digit markings would quickly become messy and inconsistent. A Different Approach Rather than printing the resistance value directly, EIA-96 uses an index system. Each number from 01 to 96 corresponds to one of the standard E96 values. For example: Code Base Value 01 100 24 174 68 499 96 976 A letter is then added to indicate the multiplier. So the resistor marking becomes: Number + Letter Instead of: Resistance Value Example: Decoding 24C Let's break down 24C. First, look up the base value: 24 → 174 Next, decode the multiplier letter: C → ×100 Now calculate: 174 × 100 = 17,400 Ω Final resistance: 17.4 kΩ At first glance, nothing about "24C" resembles 17.4 kΩ, but that's because the code i
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Why Arduino Is Named After a Bar in Italy
Ask a roomful of engineers where the name "Arduino" comes from and you will get confident answers about acronyms, Italian for "bold friend," or some clever electronics pun. Almost all of them are wrong. The most influential open-source microcontroller board in history — the one that introduced millions of students, artists, and tinkerers to embedded development — is named after a bar. The pub in Ivrea The story begins in Ivrea, a small town in northern Italy straddling the Dora Baltea river. In the early 2000s it was home to the Interaction Design Institute Ivrea, where a team led by Massimo Banzi was looking for a cheap, approachable way to teach design students how to make things that sense and respond to the world. The tools available at the time were either too expensive or too intimidating for people who were not electrical engineers. So, in 2005, the team built their own board and released the design as open hardware. They needed a name. Banzi and his collaborators were regulars at a local pub called Bar di Re Arduino — "the Bar of King Arduino." When it came time to christen the project, the bar's name stuck. There was no acronym, no marketing committee, no focus group. The board was named after the place where the people who made it spent their evenings talking through ideas. The medieval king behind the bar The bar itself carries a much older name. Arduin of Ivrea — Arduino in Italian — was a real historical figure, an Italian nobleman who became King of Italy in 1002 and held the crown until 1014. He is one of Ivrea's famous "underdog kings," remembered locally long after his short reign ended. So the chain runs a thousand years deep: a development board used in connected sensors and robots today is named after a pub, which was named after an early-medieval king who ruled around the year 1000. It is the kind of detail that sounds like trivia, but it points at something real about how durable technology actually comes together. Why the origin story matters
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From Native WordPress to Headless: The Real Engineering Decisions Behind a Production Migration
Every headless WordPress conversation starts the same way — someone draws an architecture diagram with arrows pointing from a REST API to a shiny Next.js frontend, and it looks clean. Too clean. This is a post about what happens when you close the whiteboard and open the actual codebase. The Stack Decision: GraphQL vs. REST vs. Direct MySQL This is usually the first fork in the road. For this build, the client already had a well-indexed WooCommerce site. The product catalog, slugs, and taxonomy structure were already doing heavy SEO work. So the constraint was simple: nothing about the data layer changes, only how we consume it. WPGraphQL was a real option — but it meant adding a plugin dependency to a WordPress install we were actively trying to slim down. The WP REST API was already there, no installation required, and exposed exactly what we needed: products, categories, pages, and media — all queryable by slug. The decision: WP REST API, consumed server-side via Next.js fetch in Server Components. // Fetching a product by slug — preserving the existing URL structure const res = await fetch ( ` ${ process . env . WP_API_BASE } /wp/v2/product?slug= ${ params . slug } &_embed` , { next : { revalidate : 3600 } } ); const [ product ] = await res . json (); No new dependencies on the WordPress side. The legacy install runs as a lean shell — no active theme, minimal plugins, just the REST API and the data. The Site Kit Problem: Bridging Familiar Workflows This is where most migrations quietly fail the client. The previous team lived inside WordPress admin. Google Site Kit gave them traffic stats, Search Console data, and Analytics — all surfaced in a UI they knew. Ripping that away and telling them "just use Google Analytics directly" is a workflow regression, not an upgrade. The pivot here was building a lightweight admin dashboard as part of the Next.js project — not a full replacement for Site Kit, but a mirror of the metrics they actually checked daily: Page views
开源项目
US states are reportedly planning to sue to block Paramount's Warner Bros. takeover
California's attorney general Rob Bonta launched a probe into the deal shortly after it was announced.
科技前沿
Scientists ejected from diabetes conference for distributing journal reprints
Those ousted included ADA journal editor-in-chief Steven Kahn and former ADA president Desmond Schatz
AI 资讯
Need 12 Testers for "Sugar Fall" (2D Game) - Will Test Your App Back Instantly! 🚀
Hey everyone, I need 12 more testers to complete the 14-day closed testing requirement on the Google Play Store for my game, Sugar Fall: A Whimsical Adventure with a Dark Twist! 🍩👻 Anyone can join immediately. Please support an indie dev! ✅ Step 1: Join the Google Group https://groups.google.com/g/cos-alpha-testing-team/ 📥 Step 2: Download the Game (Google Play Store) https://play.google.com/store/apps/details?id=com.crackorigins.sugarfall 🤝 Mutual Help: Please leave a comment below with your app links and a screenshot after downloading mine. I will test your app/game back immediately and keep it for 14+ days. Thank you so much for your support! 🙏 submitted by /u/anyboy1 [link] [留言]
开发者
Sources for ML news? [D]
I need a break from social media and all the bots.. Aside from Arxiv are there any sources that do a good job of aggregating the good stuff and filtering out all the junk? submitted by /u/Tiny_Arugula_5648 [link] [留言]
AI 资讯
Hand-drawn interactive searching game Hidden Folks 2 is coming next year
It'll be available for PC and mobile, and maybe Nintendo Switch down the line.
开发者
Why I started documenting everything I learn as a web developer
As a web developer, I've noticed that many beginners spend months watching tutorials but struggle when it's time to build something from scratch. That's one reason I started building WebCoDeveloper — a place where I can share practical web development knowledge, real coding examples, and solutions to problems I've faced while working on projects. My goal isn't to create another tutorial website. It's to build a resource that helps developers move from "I watched a video about it" to "I actually built it." I'm curious: What's the biggest challenge you faced while learning web development? Understanding JavaScript? React/Next.js concepts? Building projects? Finding quality learning resources? Getting your first developer job? I'd love to hear your experiences and learn what resources have helped you the most.
AI 资讯
Supercharge your macOS workspace management with Aerospace - A guide for busy people
Aerospace completely revolutionized my workflow after 15 years of using macOS the way Apple intended. I no longer hunt for apps and windows in Mission Control or drag them around spaces to organize. I can open as many windows as I need and have them all under my fingertips. And instead of swiping around to find one, I instantly teleport to where they are. This incredible software is technically aimed at advanced users. It’s installed from the command line and offers extensive configuration options. For basic use though, you don’t need to configure it at all, and if you have opened the Terminal application before and know what running a command means, you should be good to go. Rest assured, I will not show you how to configure Aerospace with Vim, or show you how to create an elaborate but useless dashboard! Just the essentials to get you started. How to set up Aerospace Aerospace is a menu bar application, but you can’t download it from an App Store or get it as a DMG file. You need a package manager. Go to the Homebrew website and follow the installation guide. Make sure to accurately follow the on-screen instructions. This may include any of the following: A prompt to enter your password. When you type passwords in Terminal, you will not see stars or anything. Just make sure you’re typing the correct one and hit Enter. A prompt to install XCode Command Line Tools . Somewhere around the end of the installation process, you may get a prompt to run some extra commands, which depend on your system. Make sure you run them as instructed. To test if you have correctly installed Homebrew, run which brew in Terminal. If you see a path printed out, like /opt/homebrew/bin/brew , you’re good to go. If not, something has gone wrong. Try searching for other, more focused guides on installing Homebrew. With Homebrew, you can install applications from the Terminal app using the brew command. For Aerospace, you would run the following command: brew install --cask nikitabobko/tap/ae
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How I Mapped Brain Cell Changes in Alzheimer's Disease Using Single-Cell RNA Sequencing
Alzheimer's disease affects over 55 million people worldwide, yet the precise molecular changes happening inside individual brain cells remain poorly understood. I wanted to dig into that question - not at the tissue level, but at single-cell resolution. So I built a full scRNA-seq analysis pipeline in Python using Scanpy, working with a publicly available dataset of 63,608 nuclei from human prefrontal cortex tissue (sourced from CZ CELLxGENE). The donors spanned three Braak stages: 0 (cognitively normal), 2 (early Alzheimer's), and 6 (severe Alzheimer's). Here's what I found and how I found it. The Dataset The data came from a study on the molecular characterisation of selectively vulnerable neurons in AD. It covers the superior frontal gyrus, a prefrontal region known to be hit hard by neurodegeneration - and includes seven major brain cell types: Glutamatergic neurons GABAergic neurons Oligodendrocytes OPCs (oligodendrocyte precursor cells) Astrocytes Microglia Endothelial cells 31,997 genes. 63,608 cells. Three disease stages. A lot to work with. The Pipeline 1. Quality Control No dataset is clean out of the box. I filtered cells to keep only those with between 200 and 6,000 detected genes, and excluded anything with more than 20% mitochondrial gene content (high mitochondrial reads usually signal a dying or damaged cell). This removed around 2,809 low-quality cells. 2. Normalisation Library sizes were normalised to 10,000 counts per cell, followed by log1p transformation, standard practice that makes cells comparable regardless of how deeply they were sequenced. I then identified 5,607 highly variable genes to focus the downstream analysis. 3. Dimensionality Reduction PCA (50 components) → neighbourhood graph (10 neighbours, 20 PCs) → UMAP embedding. The UMAP is where the biology starts to become visible. All seven cell types separated into distinct clusters, with clear separation between neuronal subtypes and glial populations. 4. Differential Expression For t
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Training-free graph SSL matches GCN with 5× fewer labels — live demo [P]
Hi all, I have been working on this method based on a hunch along with many llm for quite some time. Though first it was being engineered by me but I was learning in supervised ml area but this hunch took to semi-supervised ml and that to too deep. I then became llm orchestrator of sort while 4 llm's tried to figure it out. I put up a live demo on Hugging Face Spaces where you can try it yourself — set the number of labels, click run, see the accuracy. No installation, no code required. Brief about method Optimus — Graph SSL under Extreme Label Scarcity Key Results (PathMNIST, N=2000, 9 classes) Labels Total Optimus GCN 9(1 per class) 73.9 60.6 27(3 per class) 77.3 68.5 45(5 per class) 79.8 77.1 https://huggingface.co/spaces/Keshu007/optimus-graph-ssl Edit : You can can even run the code on your own dataset submitted by /u/Loner_Indian [link] [留言]
AI 资讯
Getting Started with Genkit in Go: Building Production-Ready AI Applications Without Reinventing the Wheel
Hello, I'm Shrijith Venkatramana. I'm building git-lrc, an AI code reviewer that runs on every commit. Star Us to help devs discover the project. Do give it a try and share your feedback for improving the product. Large Language Models have made it surprisingly easy to generate text. Building a reliable AI application, however, is a completely different problem. Once you move beyond a simple "send prompt, get response" demo, you quickly encounter real-world concerns: Prompt management Structured outputs Multi-step workflows Tool calling Observability Evaluation Model switching Production debugging Many teams end up creating custom frameworks around OpenAI, Anthropic, Gemini, or local models just to manage these concerns. This is where Genkit comes in. Originally developed by Google, Genkit provides a framework for building AI-powered applications with a focus on workflows, tooling, observability, evaluation, and production readiness. While most examples online focus on Node.js, Genkit now has growing support for Go, making it an interesting option for backend engineers who want AI capabilities without introducing an entirely separate application stack. In this article we'll build practical examples and explore how Genkit helps structure real-world AI systems. Why Genkit Exists Most AI applications evolve like this: Phase 1: response := callLLM ( prompt ) Everything seems simple. Phase 2: You need: Retry logic Prompt versioning JSON outputs Tool integrations Tracing Metrics Human review workflows Now your codebase starts accumulating AI-specific infrastructure. Genkit attempts to provide these building blocks from day one. Think of it as: "Spring Boot for AI workflows" rather than "an LLM SDK." Installing Genkit for Go Create a new project: mkdir genkit-demo cd genkit-demo go mod init github.com/example/genkit-demo Install Genkit: go get github.com/firebase/genkit/go/ai Depending on your provider, you'll also install provider plugins. For Gemini: go get github.com/fi
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I built a word puzzle RPG where you swipe letters to attack enemies — 2+ years solo, now live on Android
I just launched Kotobato on Google Play after about two and a half years of solo development. It's a word puzzle RPG — you swipe connected letters on a board to form words, and those words become attacks. Longer words deal more damage. Rarer words hit harder. I want to share what I built, why I built it this way, and what surprised me most during development. The core mechanic The board is a grid of letters. You swipe a path through connected letters to form a word. When you submit the word, it becomes an attack against the enemy. The twist: word length isn't the only thing that matters . The game has six elemental types — Animal, Nature, Knowledge, Food, Life, and Fantasy — and each word is categorized into one of these elements. Enemies have elemental weaknesses, so the right word beats a long word if you're hitting a weakness. This created an interesting design problem. In most word games, you're just maximizing point value. In Kotobato, you're making tactical choices: do I use a short word that hits a weakness, or a long word that deals raw damage? Why hiragana and English both work The game runs in both Japanese (hiragana) and English. This wasn't a late addition — it was part of the original design. Japanese hiragana is a syllabic script with 46 base characters. Because each character represents a whole syllable rather than a single phoneme, even short hiragana words feel phonetically "weighty." A 4-character hiragana word might correspond to an 8-letter English word in spoken syllables. This means the game feels different in each language — not just translated, but genuinely different. Japanese mode rewards knowledge of vocabulary that uses phonetically distinctive combinations. English mode rewards knowledge of unusual high-value words (think quixotic , ephemeral ). What I actually built 100-floor tower with escalating bosses, including historical Japanese figures like Oda Nobunaga and Toyotomi Hideyoshi Gacha character system — collectible characters with d
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Does it make sense to use alternative quantizations of QAT models? [D]
From TF's website: Quantization aware training emulates inference-time quantization, creating a model that downstream tools will use to produce actually quantized models. So is it designed to work with a very specific quantization method (for Gemma-4, presumably, Google's own)? Or would it make sense to use alternative quantization methods? According to the benchmarks unsloth released, its (alternative) quantizations of Gemma-4-QAT are closer to the QAT fine-tunes, but is it a good thing, or does it defeat the purpose of QAT? submitted by /u/we_are_mammals [link] [留言]
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Burn-9 makes an entire game out of Metal Gear's Codec scenes
Plus, check out the new trailer for the cosmic horror game Penguin Colony.
AI 资讯
The first Story-Rich showcase was packed with narrative-driven games
Fellow Traveller, the publisher behind games like Titanium Court and 1000xResist, just wrapped up its Story-Rich Showcase, which featured a bunch of narrative-driven indie games. With more than 20 games on display, there was a lot to follow, but we've pulled together some of the most notable announcements below. You can also catch the full […]
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GOG apologizes for emailing people Nazi symbols
GOG sent a newsletter about the game The End of the Sun on June 5th that included symbols associated with the Nazi SS. The Steam competitor issued a statement attributing the inclusion to a "series of mistakes," including miscommunication with the German QA team, inconsistent font rendering, and being understaffed during a bank holiday, among […]
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Sriram Krishnan is leaving his role as White House AI advisor
Krishnan is reportedly starting a new institution to continue shaping Trump's AI policy.