7.6. Project Structure Standard

Caution

This version is already obsolete. Please check the latest guideline.

Todo

Rewrite.

It is recommended to split the software source code tree into multiple projects so as to have a multi-project structure.

Note

Here, it is assumed that Maven is used as a build tool. When Maven is used, the standard multi-project structure consists of Hierarchical project layout. However, Eclipse is used as development environment and it supports only the Flat layout and not the Hierarchical layout, hence use Flat layout.

7.6.1. Simple pattern

A simplest project structure of Web application development project “foo” is as follows:

  • foo-parent
  • foo-initdb
  • foo-domain
  • foo-web
  • foo-env
  • foo-selenium

The details of each project are as follows:

  • foo-parent
Project called parent-pom (parent POM). A simple project consisting of only pom.xml file. It never contains other source code or configuration files. By specifying this foo-parent project in the <parent> tag of pom of other project, the common configuration information specified in the parent POM itself can be reflected.
  • foo-initdb
Stores the SQL statement to INSERT the initial data and table definition (DDL) of RDBMS. This is also managed as Maven project. By defining sql-maven-plugin <http://mojo.codehaus.org/sql-maven-plugin/> setting in pom.xml, the execution of DDL statement of any RDBMS and INSERT statement of initial data during the build lifecycle can be automatically executed.
  • foo-domain
Stores the classes used as domain layer such as service class, repository class etc. The class of this domain layer is used to create a class of application layer in foo-web.
  • foo-web
Stores application layer classes, jsps, configuration files, unit test cases etc. Finally *.war file is created as Web application.
  • foo-env
Consolidates only configuration files having environment dependency. foo-web has dependency on foo-env. Refer to Removing Environment Dependency for details.
  • foo-selenium
Stores test cases using Selenium WebDriver.

7.6.2. Complex pattern

The project structure of development project “bar” where 2 Web applications and 1 common library are required is as follows:

  • bar-parent
  • bar-initdb
  • bar-common
  • bar-common-web
  • bar-domain-a
  • bar-domain-b
  • bar-web-a
  • bar-web-b
  • bar-env
  • bar-web-a-selenium
  • bar-web-b-selenium

The details of each project are as follows:

  • bar-parent (same as foo-parent)
  • bar-initdb (same as foo-initdb)
  • bar-common
Stores common library in the project. This is web independent and web related classes are placed under bar-common-web.
  • bar-common-web
Stores common web library in the project.
  • bar-domain
Stores java classes and unit test cases of domain layer of Domain ‘a’. Finally *.jar file is created.
  • bar-domain
Class of domain layer of Domain ‘b’.
  • bar-web-a
Stores application layer java classes, jsps, configuration files, unit test cases etc. Finally *.war file is created as the Web application. bar-web-a has dependency on bar-common and bar-env.
  • bar-web-b
This is a Web application as one more subsystem. Its structure is same as the bar-web-a.
  • bar-env
Collects only the configuration files having environment dependency. Refer to Removing Environment Dependency for details.
  • bar-web-a-selenium
Stores test cases using Selenium WebDriver for web-a project.
  • bar-web-b-selenium
Stores test cases using Selenium WebDriver for web-b project.

Todo

Additionally, describe about splitting a JSP.