# hibernate: How to Use Hibernate 5 in an Application

Madhumita Sadhukhan

> The `hibernate` quickstart demonstrates how to use Hibernate ORM 5 API over JPA, using Hibernate-Core and Hibernate Bean Validation, and EJB.

## What is it?

The `hibernate` quickstart is based upon the kitchensink example, but demonstrates how to use Hibernate Object/Relational Mapping (ORM) 5 over JPA in WildFly Application Server.

This project is setup to allow you to create a compliant Java EE 7 application using JSF, CDI, EJB, JPA , Hibernate-Core and Hibernate Bean Validation. It includes a persistence unit associated with Hibernate session and some sample persistence and transaction code to help you with database access in enterprise Java.

## Considerations for Use in a Production Environment

H2 Database

  This quickstart uses the H2 database included with WildFly Application Server 13. 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.

Datasource Configuration File

  This quickstart uses a `*-ds.xml` datasource configuration file for convenience and ease of database configuration. These files are deprecated in WildFly and should not be used in a production environment. Instead, you should configure the datasource using the Management CLI or Management Console. Datasource configuration is documented in the Configuration Guide.

## System Requirements

The application this project produces is designed to be run on WildFly Application Server 13 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 to Build and Deploy the Quickstarts to make sure you are configured correctly for testing the quickstarts.

## Use of WILDFLY_HOME

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

## Add the Correct Dependencies

WildFly provides Hibernate 5 and JPA support.

If you use Hibernate 5 packaged within WildFly, you will need to first import the JPA API.

This quickstart demonstrates usage of Hibernate Session and Hibernate Validators.

If you look at the `pom.xml` file in the root of the hibernate quickstart directory, you will see that the dependencies for the Hibernate modules have been added with the scope as `provided`.

For example:

    <dependency>
       <groupId>org.hibernate.validator</groupId>
       <artifactId>hibernate-validator</artifactId>
        <scope>provided</scope>
    </dependency>

## Start the WildFly Standalone Server

1. Open a terminal and navigate to the root of the WildFly directory.

2. Start the WildFly server with the default profile by typing the following command.

       $ WILDFLY_HOME/bin/standalone.sh

   Note | For Windows, use the `WILDFLY_HOME\bin\standalone.bat` script.

## Build and Deploy the Quickstart

1. Make sure you start the WildFly server as described above.

2. Open a terminal and navigate to the root directory of this quickstart.

3. Type the following command to build the artifacts.

       $ mvn clean package wildfly:deploy

This deploys the `hibernate/target/hibernate.war` to the running instance of the server.

You should see a message in the server log indicating that the archive deployed successfully.

## Access the Application

The application will be running at the following URL: http://localhost:8080/hibernate/.

## Server Log: Expected Warnings and Errors

You will see the following warnings in the server log. You can ignore these warnings.

    WFLYJCA0091: -ds.xml file deployments are deprecated. Support may be removed in a future version.

    HHH000431: Unable to determine H2 database version, certain features may not work

## Undeploy the Quickstart

When you are finished testing the quickstart, follow these steps to undeploy the archive.

1. Make sure you start the WildFly server as described above.

2. Open a terminal and navigate to the root directory of this quickstart.

3. Type this command to undeploy the archive:

       $ mvn wildfly:undeploy

## Run the Quickstart in Red Hat JBoss Developer Studio or Eclipse

You can also start the server and deploy the quickstarts or run the Arquillian tests in Red Hat JBoss Developer Studio or from Eclipse using JBoss tools. For general information about how to import a quickstart, add a WildFly server, and build and deploy a quickstart, see Use JBoss Developer Studio or Eclipse to Run the Quickstarts.

## Debug the Application

If you want to debug the source code of any library in the project, run the following command to pull the source into your local repository. The IDE should then detect it.

    $ mvn dependency:sources

Note | You might see the following message when you run the command. It indicates the source is not provided in the third-party `antlr` JAR.
    [INFO] The following files have NOT been resolved:
    [INFO]    antlr:antlr:jar:sources:2.7.7:provided