barbelhisto

A lightweiht easy to use Java library to store the history of changes of domain objects in bi-temporal format.

BarbelHisto tracks two time dimensions for you: record time is when a change to a domain object was recorded in the system (created and inactivated) and effective time is when this change is opposed to become effective or valid from a business viewpoint.

The library implements Martin Fowlers Temporal Pattern that can be found here: https://martinfowler.com/eaaDev/timeNarrative.html

Features

• bi-temporal (auditing-proof) data storage based on blazing fast cqengine collections
• small easy-to-use API (as simple as bi-temporal data storage can get)
• backed by transactional, high performance collections
• works out of the box with default implementation and configuration
• manage different time zones of client and server
• persistence support for heap, off-heap, disk storage and custom data stores
• provides basic functionality, extendible for individual needs
• remember every change to the data, nothing is ever going to be deleted
• build-in thread safety by minimizing mutability and object locking
• pretty print function to learn about bitemporal data storage

Get a version of BarbelHisto

Get a version on Maven Central.

Download the actual snapshot releases.

Or clone this git repository to try some of the features of BarbelHisto.

Getting started with POJOs

• Get started with Spring turorial
• Get started with Mongo turorial

Memory analysis

Memory analysis results. One hour run, 5000 Objects saved every 10 seconds. OnHeapPersistence.
Result details here.