FFFred Fenginfredfeng.hashnode.dev·Oct 5 · 7 min readVortex TSDB: Live Metrics in One CommandHTTP Writes, Minute Aggregates, Sliding Windows, Replicated in Memory 1. Overview Lightweight. Replicated. Real-time. Vortex TSDB is a distributed time series database for live metrics. Push numbers00
FFFred Fenginfredfeng.hashnode.dev·Oct 1 · 6 min readCronflower: Run a DAG workflow across your cluster, instead of chaining cron jobscronflower is an open-source, distributed scheduler for the JVM with a web console. cronflow is its optional DAG add-on: declare the steps and how they depend on each other as a graph, and the same cl00
FFFred Fenginfredfeng.hashnode.dev·Oct 1 · 6 min readCronflower: Turn a Spring Boot app into a distributed cron cluster easilycronflower is an open-source, distributed cron scheduler for the JVM with a web console. It forms its own cluster and needs no external database, broker, or coordinator. This post is the usage tour of00
FFFred Fenginfredfeng.hashnode.dev·Sep 27 · 15 min readGreenfinger 2.0: One url in, a searchable archive outCrawl the whole site. Keep every page, every picture, every version.Search it by words, by meaning, or by describing a picture you remember.Add a node and it goes faster. Kill one and it keeps going.N01O
FFFred Fenginfredfeng.hashnode.dev·Sep 20 · 12 min readEasyJPA: Criteria API Power in Three Lines, Not Thirty1. Overview EasyJPA — Criteria API power. Three lines, not thirty. EasyJPA is a Spring Boot starter that puts a fluent, lambda-driven API over the JPA Criteria API. Every condition is a method referen00
