HTML Persistence Projects

Permazen

10 396 9.2 HTML

Language-Natural Persistence Layer for Java

Project mention: ORMs are nice but they are the wrong abstraction | news.ycombinator.com | 2024-02-01

The most interesting/fresh approach I've seen to this problem is Permazen.
https://github.com/permazen/permazen/
It starts by asking what the most natural way is to integrate persistence with a programming language (Java in this case, but the concepts are generic), and then goes ahead and implements the features of an RDBMS as an in-process library that can be given different storage backends as long as they implement a sorted K/V store. So it can sit on top of a simple in-process file based K/V store, RocksDB, FoundationDB, or any SQL database like PostgreSQL, SQLite, Spanner, etc (it just uses the RDBMS to store sorted key/value pairs in that case).
Essentially it's a way to map object graphs to key/value pairs but with the usual features you'd want like indexing, validation, transactions, and so on. The design is really nice and can scale from tiny tasks you'd normally use JSON or object serialization for, all the way up to large distributed clusters.
Because the native object model is mapped directly to storage there's no object/relational mismatch.

QueryStream

0 15 6.4 HTML

Build JPA Criteria queries using a Stream-like API
InfluxDB

www.influxdata.com sponsored

Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).