Adding a Module to JBoss EAP

15 minutes
  • 4 Learning Objectives

About this Hands-on Lab

The JBoss Enterprise Application Platform provides extensive support for deploying and managing Java-based applications. Part of this support includes the ability to add and create modules, which in turn opens up additional functionality for your application — such as allowing the option to connect to a MySQL database, as in this lab.

Learning Objectives

Successfully complete this lab by achieving the following learning objectives:

Download Module Drivers
  1. Download the MySQL JDBC connector:

    wget https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-8.0.18.tar.gz
  1. Extract the contents:

    tar xf mysql-connector-java-8.0.18.tar.gz
Create Module
  1. Move into the modules directory:

    cd /opt/jboss-eap/modules
  1. Create com directory to store local, non-system modules:

    sudo mkdir com
  2. We can now create the mysql module directory underneath this; each module stores all required configurations and JAR files in a required main directory, so create this, too:

    sudo mkdir -p com/mysql/main
  3. Move the downloaded .jar file into this new directory:

    sudo mv ~/mysql-connector-java-8.0.18/mysql-connector-java-8.0.18.jar com/mysql/main/
Create .xml File

Within the main directory for the mysql module, create a module.xml file to configure the MySQL JDBC diver. Note that the name of the module must mimic the directory structure — in this case, it should be com.mysql:

sudo vim com/mysql/main/module.xml

<?xml version="1.0" ?>
<module xmlns="urn:jboss:module:1.1" name="com.mysql">
  <resources>
    <resource-root path="mysql-connector-java-8.0.18.jar"/>
  </resources>
  <dependencies>
    <module name="javax.api"/>
    <module name="javax.transaction.api"/>
  </dependencies>
</module>

Note that the dependencies provided are system modules, found in /opt/jboss-eap/modules/system/layers/base/javax/.

Add as a Global Module
  1. Open the management CLI:

    cd ..
    sudo ./bin/jboss-cli.sh
  1. Connect:

    connect
  2. Add the module to global modules, under the EE subsystem:

    /subsystem=ee:list-add(name=global-modules,value={name=com.mysql})
  3. We can check that the module has been added by logging in to the Management Console at PUBLICIP:9990 using the username admin and the password pinehead. Select Start, under Configuration, then select Subsystems from the menu. View the EE subsystem. Select Global Modules — the com.mysql module should be listed.

Additional Resources

You are setting up a new JBoss EAP standalone configuration to support a fledgling project for your team. The standalone server will support a number of small applications, each needing the ability to connect to an existing MySQL database. Because of this, the MySQL JDBC driver needs to be added as a module to the standalone server setup. Since all applications need access to this module, it should be enabled as a global module.

The JBoss EAP home directory can be found at /opt/jboss-eap. To log in to the Management Console, use PUBLICIP:9990 with the username admin and the password pinehead.

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