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[API Development](/categories/api) 4. / 5. busfactor/busfactor ActiveLibrary[API Development](/categories/api) busfactor/busfactor =================== CQRS and Event Sourcing infrastructure for modern PHP v1.0.14(3y ago)99.4k↑50%1MITPHPPHP ^7.3 || ^8.0 Since Jul 22Pushed 3y ago1 watchersCompare [ Source](https://github.com/busfactor/busfactor)[ Packagist](https://packagist.org/packages/busfactor/busfactor)[ Docs](https://github.com/busfactor/busfactor)[ RSS](/packages/busfactor-busfactor/feed)WikiDiscussions master Synced 1mo ago READMEChangelog (10)Dependencies (6)Versions (16)Used By (0) BusFactor ========= [](#busfactor) [![Latest Version](https://camo.githubusercontent.com/9164b9cd6c02619601115dd8f42820992620829f2395444e889de60fe0282a7b/68747470733a2f2f696d672e736869656c64732e696f2f6769746875622f72656c656173652f627573666163746f722f627573666163746f722e737667)](https://github.com/busfactor/busfactor/releases)[![Software License](https://camo.githubusercontent.com/7013272bd27ece47364536a221edb554cd69683b68a46fc0ee96881174c4214c/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f6c6963656e73652d4d49542d626c75652e737667)](LICENSE) BusFactor is a modern PHP library providing several components you can mix and match to implement the CQRS and Event Sourcing patterns in your application. Install ------- [](#install) Using [Composer](https://getcomposer.org/): ``` $ composer require busfactor/busfactor ``` Requirements ------------ [](#requirements) - PHP >=7.3 with `json` and `pdo` extensions enabled. Components ---------- [](#components) ComponentDescription`Aggregate`Interfaces and traits for plain DDD aggregates and domain events.`AggregateStore`Persistence for aggregates.`CacheProjectionStoreMiddleware`Caching middleware for `ProjectionStore`.`CommandBus`Implementation of the Command Bus pattern.`EventBus`Implementation of the Publish-Subscribe pattern for event streams.`EventSourcedAggregate`Interface and trait for event-sourced aggregates.`EventSourcedAggregateStore``AggregateStore` adapter for event-sourced aggregates persistence.`EventStore`Persistence for event streams.`EventStoreReductionInspection`Output single value from `EventStore` inspection.`EventStream`Event streams for event-sourced aggregates.`LaravelCacheProjectionStore`Laravel Cache adapter for `ProjectionStore`.`MemcachedProjectionStore`Memcached adapter for `ProjectionStore`.`ObjectSerializer`Interface for object serialization.`Pdo`Decorating interface for PHP Data Objects (PDO).`PdoAggregateStore`PDO adapter for `AggregateStore`.`PdoEventStore`PDO adapter for `EventStore`.`PdoProjectionStore`PDO adapter for `ProjectionStore`.`PdoProxy`Lazy-connecting PDO proxy.`Problem`Interface for Problem Details aware exceptions.`Projection`Interface for projections.`ProjectionStore`Persistence for projections.`ReflectionObjectSerializer`Reflection-based adapter for `ObjectSerializer`.`Scenario`Testing infrastructure on top of PHPUnit.`SnapshotAggregateStoreMiddleware``AggregateStore` middleware for event-sourced aggregate snapshots.`StreamEnricher`Interface for event stream enrichers.`StreamEnricherEventBusMiddleware``EventBus` middleware for event stream enrichment with `StreamEnricher`.`StreamEnricherEventStoreMiddleware``EventStore` middleware for event stream enrichment with StreamEnricher`.`StreamPublishingInspection`Publish event streams from `EventStore` inspection.`Uuid`Universally Unique IDentifier (UUID) generation.Testing ------- [](#testing) ``` $ vendor/bin/phpunit ``` Credits ------- [](#credits) - [Maxime Gosselin](https://github.com/maximegosselin) License ------- [](#license) The MIT License (MIT). Please see [License File](LICENSE) for more information. ### Health Score 36 — LowBetter than 82% of packages Maintenance20 Infrequent updates — may be unmaintained Popularity29 Limited adoption so far Community8 Small or concentrated contributor base Maturity71 Established project with proven stability Bus Factor1 Top contributor holds 100% of commits — single point of failure How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window. **Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores. **Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement. **Maturity (30%)** — Project age, version count, PHP version support, and release stability. ### Release Activity Cadence Every ~84 days Recently: every ~185 days Total 15 Last Release 1307d ago PHP version history (2 changes)v1.0.0PHP >=7.3 v1.0.11PHP ^7.3 || ^8.0 ### Community Maintainers ![](https://www.gravatar.com/avatar/4efed0d18fdb420bcab4a89c4e7db7276ddfb9d713c6c3b6ad60106134028622?d=identicon)[maximegosselin](/maintainers/maximegosselin) --- Top Contributors [![maximegosselin](https://avatars.githubusercontent.com/u/3958246?v=4)](https://github.com/maximegosselin "maximegosselin (24 commits)") --- Tags aggregatecommandcommand-buscqrsdomain-driven-designeventevent-busevent-sourcingevent-storeevent-streamphpprojection ### Code Quality TestsPHPUnit Static AnalysisPHPStan Code StylePHP CS Fixer Type Coverage Yes ### Embed Badge ![Health badge](/badges/busfactor-busfactor/health.svg) ``` [![Health](https://phpackages.com/badges/busfactor-busfactor/health.svg)](https://phpackages.com/packages/busfactor-busfactor) ``` ### Alternatives [sylius/sylius E-Commerce platform for PHP, based on Symfony framework. 8.4k5.6M651](/packages/sylius-sylius)[knuckleswtf/scribe Generate API documentation for humans from your Laravel codebase.✍ 2.3k12.2M45](/packages/knuckleswtf-scribe)[google/gax Google API Core for PHP 265103.1M454](/packages/google-gax)[mpociot/laravel-apidoc-generator Generate beautiful API documentation from your Laravel application 3.5k3.1M12](/packages/mpociot-laravel-apidoc-generator)[temporal/sdk Temporal SDK 4002.2M18](/packages/temporal-sdk)[wheelpros/fitment-platform-api Magento 2 (Open Source) 12.1k1.2k](/packages/wheelpros-fitment-platform-api) PHPackages © 2026 [Directory](/)[Categories](/categories)[Trending](/trending)[Changelog](/changelog)[Analyze](/analyze)