LiteFlow LiteFlow
💒Home
📚Documents
💖Donation
🚀Plugin
  • About LiteFlow
  • Update Record
Community
Users
Gitee (opens new window)
Github (opens new window)
  • 简体中文 (opens new window)
  • English (opens new window)
💒Home
📚Documents
💖Donation
🚀Plugin
  • About LiteFlow
  • Update Record
Community
Users
Gitee (opens new window)
Github (opens new window)
  • 简体中文 (opens new window)
  • English (opens new window)
  • 🍤Introduction
  • 🍓Features
  • 🍟Quick Start(Hello world)

    • 🍄Notice
    • 🌿Springboot environment

      • 🧬Dependency
      • ⚙️Config
      • 🛫Execute
    • 🌱Spring environment

      • 🧬Dependency
      • ⚙️Config
      • 🛫Execute
    • 🌵Other environment

      • 🍄Notice
      • 🧬Dependency
      • ⚙️Config
      • 🛫Execute
  • 🍢Configuration item

    • 🍄Notice
    • 🌿Springboot environment
    • 🌱Spring environment
    • 🌵Other environment
  • 🗂Rules file

    • 📔Rules file format
    • 📕Local rule file
    • 📗Zookeeper source
    • 📘SQL database source
    • 📋Nacos source
    • 🗄Etcd source
    • 📙Custom source
  • 🔗General components

    • 📎Common component
    • ✂️Switch component
    • 📌If component
    • 🧬For component
    • ⛓While component
    • 🧿Break component
  • 🧩How to write EL rules

    • 🍄Notice
    • 🌴Serial mode
    • 🎋Parallel mode
    • 🌾Switch mode
    • 🌵If mode
    • 🌳Loop mode
    • 🍁Use sub chain
    • 🍂Use sub variables
    • 💐Complex example
    • 🌻About semicolons
    • 🌰About comments
    • 🐚Component Name Package
  • 🌮Data context

    • 🍄Notice
    • 🌯Definition and use
    • 🪶Pass initialized context
  • 🛩Flow executor

    • 🍄Notice
    • 🎡Executor method
    • 🎢Chain input parameter
    • 🎈LiteflowResponse object
  • 🍋Script component

    • 🍫Choose a script language
    • 🍕Define script component
    • 🌯Define file script
    • 🍣Interact with java
    • 🍘Dynamic refresh script
  • 🍇Declarative component

    • 🥭What is a declarative component
    • 🧅Class level declaration
    • 🥥Method level declaration
  • 🎲Dynamic rules

    • 🍄Notice
    • 🎯How to build
  • 🎨Advanced features

    • 🍒Pre & Finally components
    • 🥠Substitute component
    • 🍉Component Parameters
    • 🍑Component alias
    • 🍍Component tag
    • 🥝Component event
    • 🥑Implicit chain
    • 🍕Private delivery
    • 🍣Component retry
    • 🍖Smooth hot refresh
    • 🍪Component aspect
    • 🍡Step information
    • 🧊Exceptions
    • 🧇Printing details
    • 🧁Custom request id
    • 🌭Multiple type rules
    • 🥗Asynchronous thread pool
    • 🍿Custom component executor
    • 🍥Simple monitor
    • 🧉DTD in Xml
  • ⛱Test cases and demo

    • 🪁Test cases
    • 🪀Demo
  • 🪂Performance
  • v2.9.X文档
  • 🔗General components
铂赛东
2022-08-26

📌If component

Starting from version 2.8.5, LiteFlow provides the definition of conditional components.

Conditional components can also be called IF components, and the return is a true/false. Can be used for keywords such as IF...ELIF...ELSE.

For the usage of IF...ELIF...ELSE expressions, please refer to the chapter If mode.

For example, an IF with three arguments, as shown below, x is the IF component, if true, execute a, if false, execute b:

<chain name="chain1">
    IF(x, a, b);
</chain>

The definition of the x node needs to inherit the NodeIfComponent class:

@Component("x")
public class XCmp extends NodeIfComponent {
	@Override
	public boolean processIf() throws Exception {
	    //do your biz
		return true;
	}
}

See the chapter Common Components for the methods that can be overridden and the methods that can be called by the this keyword.

Help us improve this document (opens new window)
last update: 2022/10/13, 00:02:27
✂️Switch component
🧬For component

← ✂️Switch component 🧬For component→

Theme by Vdoing | Copyright © 2020-2022 铂赛东 | MIT License
  • 跟随系统
  • 浅色模式
  • 深色模式
  • 阅读模式