Renato Ivancic - Software Engineer

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AsyncAPI Generator Gradle Plugin


AsyncAPI Gradle Plugin

AsyncAPI Gradle plugin that delegates installation and execution of npm commands to com.github.node-gradle.node Gradle plugin.

This way one doesn’t need to care about node and npm installation within JVM project in order to use AsyncAPI generator.


To use the async generator in you Gradle build, apply the plugin:

plugins {
    id "com.rivancic.asyncapi-gradle-plugin" version "0.1.0"

Plugin is available on Gradle Plugin Portal under com.rivancic.asyncapi-gradle-plugin.

Source code on GitHub

Whole build script example:

plugins {
  id("com.rivancic.asyncapi-gradle-plugin") version "0.1.0"

node {

asyncapi {
  // debug.set(true)
  // printVersion.set(true)
  // output.set("build/asyncapi")

You will be able to execute code generation with gradlew generate command. Generated code is by default placed in build/asyncapi folder.

AsyncAPI Generator Gradle Plugin

Above is the view of the sample project in the IDE. On the right side there is generate Gradle task under asyncapi group. If executed then build script form the middle screen is being executed. If node and npm aren’t yet installed they will be installed locally under the .gradle directory. You can check packages and installed modules in that directory.


One can configure following parameters through asyncapi extension:

asyncapi and template parameters are required to be set.

asyncapi {

  // You want a specific version of the generator because your template might not be compatible with the latest 
  // generator. Check what version you need and perform installation, specifying the exact version.
  version = "1.9.8"
  // Local path or URL pointing to AsyncAPI specification file
  asyncapi = null

  // Name of the generator template like for example <i>@asyncapi/html-template</i> or 
  // <i></i>
  template = null

  // Directory where to put the generated files (defaults to current directory)
  output = "build/asyncapi"

  // Output the version number
  printVersion = false

  // Enable more specific errors in the console
  debug = false

  // Force writing of the generated files to given directory even if it is a git repo with unstaged files or not empty 
  // dir (defaults to false)
  forceWrite = false

  // Additional parameters that will be passed to templates. Have to be provided as a map.
  parameters = [:]

It’s planned to support all the AsyncAPI CLI options.

Additionally one can leverage configuration of com.github.node-gradle.node plugin with node extension. For example:

node {
  download = false
  version = "16.14.0"


Task Description
generate Generate code based on the configuration form variables
assemble Depends on generate task
clean Basic clean task, will delete build directory

#Gradle #AsyncAPI #Plugin