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h2-console: Example Using the H2 Console with JBoss EAP

Author: Pete Muir
Level: Beginner
Technologies: H2
Summary: The h2-console quickstart demonstrates how to use the H2 Console that is bundled with and built specifically for JBoss EAP.
Target Product: JBoss EAP
Source: https://github.com/jboss-developer/jboss-eap-quickstarts/

What is it?

Red Hat JBoss Enterprise Application Platform bundles H2 as an in-memory, in-process database. H2 is written in Java so it can run on any platform that JBoss EAP runs on.

The h2-console quickstart comes bundled with a version of the H2 Console built for JBoss EAP. To make the H2 console run on JBoss EAP, the H2 libraries were removed from the WAR and a dependency on the H2 module was added to the META-INF/MANIFEST.MF file. The rebuilt console is provided in the root directory of this quickstart.

This quickstart demonstrates how to use the H2 console with Red Hat JBoss Enterprise Application Platform. It uses the greeter quickstart as a GUI for entering data.

Note: This quickstart uses the H2 database included with Red Hat JBoss Enterprise Application Platform 7.1. It is a lightweight, relational example datasource that is used for examples only. It is not robust or scalable, is not supported, and should NOT be used in a production environment!

System Requirements

The application this project produces is designed to be run on Red Hat JBoss Enterprise Application Platform 7.1 or later.

All you need to build this project is Java 8.0 (Java SDK 1.8) or later and Maven 3.3.1 or later. See Configure Maven for JBoss EAP 7.1 to make sure you are configured correctly for testing the quickstarts.

Prerequisites

This quickstart depends on the deployment of the greeter quickstart. Before running this quickstart, see the greeter README file for details on how to deploy it.

You can verify the deployment of the greeter quickstart by accessing the following URL: http://localhost:8080/greeter/

When you have completed testing this quickstart, see the greeter README file for instructions to undeploy the archive.

Use of EAP7_HOME

In the following instructions, replace EAP7_HOME with the actual path to your JBoss EAP installation. The installation path is described in detail here: Use of EAP7_HOME and JBOSS_HOME Variables.

Deploy the H2 Console

Deploy the console by copying the h2-console.war located in the root directory of this quickstart to the EAP7_HOME/standalone/deployments directory.

Note: You will see the following warning in the server log. You can ignore this warning.

WFLYSRV0019: Deployment "deployment.h2-console.war" is using an unsupported module ("com.h2database.h2:main") which may be changed or removed in future versions without notice.

Access the H2 Console

You can access the console at the following URL: http://localhost:8080/h2-console/.

You need to enter the JDBC URL, and credentials. To access the test database that the greeter quickstart uses, enter these details:

  • JDBC URL: jdbc:h2:mem:greeter-quickstart;DB_CLOSE_ON_EXIT=FALSE;DB_CLOSE_DELAY=-1
  • User Name: sa
  • Password: sa

Click on the Test Connection button to make sure you can connect. If you can, go ahead and click Connect.

Investigate the H2 Console

Take a look at the data added by the greeter application. Run the following SQL command:

    select * from users;

You should see the two users seeded by the greeter quickstart, plus any users you added when testing that application.

Undeploy the Archive

To undeploy this example, simply delete the h2-console.war from the EAP7_HOME/standalone/deployments directory.

 cd EAP7_HOME/standalone/deployments
 rm h2-console.war