In this tutorial, you’ll learn how to create a Liferay API as a Liferay module. To create a Liferay API via the command line using Blade CLI or Maven, use one of the commands with the following parameters:

blade create -t api [-p packageName] [-c className] projectName

or

mvn archetype:generate \
    -DarchetypeGroupId=com.liferay \
    -DarchetypeArtifactId=com.liferay.project.templates.api \
    -DartifactId=[projectName] \
    -Dpackage=[packageName] \
    -DclassName=[className] \
    -DliferayVersion=7.1

You can also insert the -b maven parameter in the Blade command to generate a Maven project using Blade CLI.

The template for this kind of project is api. The api template creates a simple api module with an empty public interface. For example, suppose you want to create an API project called my-api-project with a package name of com.liferay.docs.api and a class name of MyApi. You could run the following command to accomplish this:

blade create -t api -p com.liferay.docs -c MyApi my-api-project

or

mvn archetype:generate \
    -DarchetypeGroupId=com.liferay \
    -DarchetypeArtifactId=com.liferay.project.templates.api \
    -DgroupId=com.liferay \
    -DartifactId=my-api-project \
    -Dpackage=com.liferay.docs \
    -Dversion=1.0 \
    -DclassName=MyApi \
    -Dauthor=Joe Bloggs \
    -DliferayVersion=7.1

After running the Blade command above, your project’s directory structure looks like this:

  • my-api-project
    • gradle
      • wrapper
        • gradle-wrapper.jar
        • gradle-wrapper.properties
    • src
      • main
        • java
          • com/liferay/docs/api
            • MyApi.java
        • resources
          • com/liferay/docs/api
            • packageinfo
    • bnd.bnd
    • build.gradle
    • gradlew

The Maven-generated project includes a pom.xml file and does not include the Gradle-specific files, but otherwise, appears exactly the same.

The generated module is a working application and is deployable to a Liferay Portal instance. To build upon the generated app, modify the project by adding logic and additional files to the folders outlined above.

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