IDEA - Module (iml)

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About

A module is a discrete unit of functionality which you can compile, run, test and debug independently.

Modules contain everything that is required for their specific tasks:

  • source code,
  • build scripts,
  • unit tests,
  • deployment descriptors,
  • and documentation.

However, modules exist and are functional only in the context of a project. Depending on the logical and functional requirements to the project, you can create:

  • a single-module
  • or a multi-module project.

Configuration

File > Project Structure > Module

Idea Module Configuration

Storage (iml file)

Configuration information for a module is stored in a .iml module file. By default, such a file is located in the module's content root folder.

Development teams, normally, share the .iml module files through version control.

The information about modules the project includes is stored in %module_name%.iml files. Module files are created for each module.

Directory Structure

Content root is a folder that contains all the files that make up your module.

Idea Folder Category

Folders within a content root can be assigned to the following categories:

  • Source roots (content must be compiled)
  • Generated source roots (the generated source roots are not suggested as target folders on certain wizard)
  • Test source roots (code intended for testing)
  • Generated test source roots
  • Resource roots (only in Java modules) During the build process, all the contents of the resource folders are copied to the output folder as is.
  • Test resource roots
  • Excluded roots (IDEA will Ignore)

Dependency

Dependency

Configuration

A facet represents certain configuration, specific for a particular framework/technology, associated with a moduel. A module can have multiple facets.

List

Module type Description
Java Module Encapsulates core functionality for building Java applications. The functionality of a Java module can be expanded by adding facets.
Web Module Provides facilities for developing web applications using programming languages other than Java, for example, PHP, or JavaScript, or markup languages.
Plugin Module Facilitates development of IntelliJ IDEA plugins. Supports IntelliJ IDEA SDK configuration and run configurations for running a dedicated IntelliJ IDEA instance for plugin debugging.
J2ME Module Provides facilities for developing J2ME mobile applications, including support for various Mobile JDK and J2ME-oriented run configurations.
Flash Module This module type is intended for developing Adobe Flash platform-targeted content (applications and libraries for web (Flash Player), desktop (Adobe AIR) and mobile devices (AIR mobile)).
Android Module Encapsulates core functionality for developing Android applications.
Maven Module Provides facilities for managing Maven projects, executing Maven goals, downloading artifacts.
Grails Application Provides facilities for Grails application development.
Griffon Application Provides facilities for Griffon application development.
The following module types are available provided that the corresponding plugins are downloaded and enabled:
Ruby Module Provides facilities for creating Ruby projects and Rails applications.
Python Module Provides facilities for Python, Django and Google App Engine development.

Documentation / Reference





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