Master LiteFlow: Simplify Complex Business Logic in SpringBoot

LiteFlow Overview

LiteFlow is a lightweight, powerful workflow engine framework for orchestrating complex componentized business logic in Java projects. It allows defining business logic as components and linking them through concise rule files.

Key Features

Unified component definition using Spring annotations like @Component Lightweight rule files (XML, JSON, YML) with a five‑minute learning curve

Support for serial, parallel, switch, and conditional orchestration

Dynamic rule hot‑refresh without restarting the application

Compatibility with SpringBoot, Spring, and other Java projects

IDEA Plugin

The LiteFlowX plugin provides intelligent hints, syntax highlighting, component‑to‑rule navigation, and a toolbox for rule files.

Rule Expressions

Serial orchestration uses the THEN keyword, parallel uses WHEN, switch uses SWITCH, conditional uses IF, and else/elif use ELSE and ELIF. Example XML snippets illustrate each pattern.

Integration Steps

Add the Maven dependency liteflow-spring-boot-starter (v2.8.5) to pom.xml and configure application.yml with liteflow.rule-source: liteflow/*.el.xml. Define components by extending NodeComponent (or NodeSwitchComponent) and implement process() and optional isAccess() methods.

Rule Files and Main Flow

Sub‑chains (e.g., promotion calculations) and the main chain are described in XML, linking components such as checkCmp, promotionChain, couponCmp, and conditional postage components.

Controller Invocation

A Spring MVC controller injects FlowExecutor and calls execute2Resp("mainChain", request, PriceContext.class) to run the flow and obtain the result.

Context Management

All data is stored in a shared PriceContext object, which holds order details, member info, coupons, promotion packs, price steps, and logs. Components read and write this context to pass information without explicit parameters.

Conclusion

LiteFlow simplifies complex business processes, making them clear and maintainable with minimal code. Its concise rule language and hot‑refresh capability enable rapid development.

Resources

Project repository: https://gitee.com/dromara/liteFlow