Overview of Meituan-Dianping Open-Source Development Tools: mpvue, Walle, SQLAdvisor, Leaf, and Robust

The article presents a collection of open‑source tools released by Meituan‑Dianping that aid developers in building mobile and backend applications.

mpvue

mpvue is a Vue.js‑based framework for developing mini‑programs on platforms such as WeChat, Baidu, Toutiao, and Alipay. It modifies the runtime and compiler to run Vue.js code in mini‑program environments, providing a full Vue.js development experience.

Main Features:

Component‑based development for high code reuse.

Complete Vue.js development experience.

Integrated Vuex for complex state management.

Customizable webpack build with hot‑reload support.

Support for npm external dependencies.

CLI initialization via vue-cli .

H5 code conversion to mini‑program targets.

Project address: https://github.com/Meituan-Dianping/mpvue

Walle (Channel Packaging Tool)

Walle is a new‑generation channel‑packaging tool for Android APKs using the APK Signature V2 scheme. It adds custom channel information into the APK Signature Block to generate channel packages efficiently.

Gradle Configuration (Root build.gradle):

buildscript {
    dependencies {
        classpath 'com.meituan.android.walle:plugin:1.1.7'
    }
}

Gradle Configuration (App module build.gradle):

apply plugin: 'walle'

dependencies {
    compile 'com.meituan.android.walle:library:1.1.7'
}

Walle plugin settings:

walle {
    // Output directory for channel APKs
    apkOutputFolder = new File("${project.buildDir}/outputs/channels")
    // APK file name format
    apkFileNameFormat = '${appName}-${packageName}-${channel}-${buildType}-v${versionName}-${versionCode}-${buildTime}.apk'
    // Channel configuration file
    channelFile = new File("${project.getProjectDir()}/channel")
}

Project address: https://github.com/Meituan-Dianping/walle

SQLAdvisor

SQLAdvisor, developed by Meituan‑Dianping's DBA team, analyzes MySQL SQL statements and provides index‑optimization suggestions based on lexical parsing, WHERE clauses, aggregation, and join relationships.

Project address: https://github.com/Meituan-Dianping/SQLAdvisor

Leaf (Distributed ID Generation Service)

Leaf offers two ID generation modes—segment and Snowflake—to replace traditional DB auto‑increment, Redis, or UUID approaches. It serves many Meituan‑Dianping business lines with high QPS and low latency.

Configuration file: leaf-server/src/main/resources/leaf.properties

Key configuration items (selected):

leaf.segment.enable : enable segment mode (default false)

leaf.jdbc.url : MySQL connection URL

leaf.jdbc.username : MySQL username

leaf.jdbc.password : MySQL password

leaf.snowflake.enable : enable Snowflake mode (default false)

leaf.snowflake.zk.address : Zookeeper address for Snowflake

leaf.snowflake.port : service port for Snowflake

Project address: https://github.com/Meituan-Dianping/Leaf

Robust (Hot‑Update System)

Robust is a next‑generation hot‑update system compatible with Android 2.3‑10, allowing patches to take effect without restarting the app, with a success rate of 99.9%.

Usage Steps:

Add dependencies in the app module build.gradle : apply plugin: 'com.android.application' // apply plugin: 'auto-patch-plugin' (enable when creating patches) apply plugin: 'robust' compile 'com.meituan.robust:robust:0.4.99'

Add classpath in the project‑level build.gradle : buildscript { repositories { jcenter() } dependencies { classpath 'com.meituan.robust:gradle-plugin:0.4.99' classpath 'com.meituan.robust:auto-patch-plugin:0.4.99' } }

Create app/robust.xml in the project root (refer to demo for details).

Advantages include support for Android 2.3‑10, high compatibility, real‑time patch application, method‑level fixes (including static methods), addition of methods/classes, and compatibility with ProGuard.

Project address: https://github.com/Meituan-Dianping/Robust