PRegister

PRegister is a lightweight, cross-language library that provides a persistent register abstraction for applications. It enables creating named registers, reading and writing values, and persisting state to durable storage when required.

In PRegister, registers are organized into namespaces; each register is a key-value pair with an optional type. Updates can be performed atomically and can include optimistic concurrency control via version tokens. The library supports simple transactions and change listeners for reactive workflows. It is intended to complement existing data stores by offering fast, in-process access to small pieces of state while ensuring durability optional.

PRegister uses pluggable backends to store data. In-memory mode provides low latency access; file- or SQLite-backed stores provide durability on disk; distributed backends such as Redis or etcd can be used for cross-process consistency. Values are serialized through formats such as JSON, MessagePack, or Protocol Buffers.

The project provides implementations in several languages, including Go, Python, and JavaScript, with community adaptations in other ecosystems.

Common use cases include feature flag evaluation, dynamic configuration, and lightweight counters in microservices. It is designed as a targeted primitive, not a full database, and is typically used to complement larger data stores.