See also: Customizing the database connection

The database connection is handled by Hibernate. The properties below (set in /properties/config.properties) are used by the Hibernate configuration files /properties/dao/hibernate/hibernate-jdbc.cfg.xml and /properties/dao/hibernate/hibernate-jndi.cfg.xml, as well as the Tomcat configuration file conf/server.xml for quick-start deployments.

default-table-type=innodb

Database manager properties

Driver

The driver of the database manager (by default MySql JDBC):

#hibernate.connection.driver_class=com.mysql.jdbc.Driver

For Postgres use:

hibernate.connection.driver_class=org.postgresql.Driver

Hibernate dialect

The Hibernate dialect, by default MySql InnoDB:

#hibernate.dialect=org.hibernate.dialect.MySQLInnoDBDialect

For Postgres use:

hibernate.dialect=org.hibernate.dialect.PostgreSQLDialect

JDBC properties

esup-helpdesk always uses JDBC to access the database from ant tasks (asynchronous commands).

URL (required)

The JDBC URL of the database, by default helpdesk on localhost:

#hibernate.connection.jdbc.url=jdbc:mysql://localhost/helpdesk

For Postgres use:

hibernate.connection.jdbc.url=jdbc:postgresql://localhost:5432/helpdesk

Authentication (required)

The credentials used to connect to the database:

#hibernate.connection.jdbc.username=admin
#hibernate.connection.jdbc.password=secret

JNDI properties

esup-helpdesk can use JNDI to access the database from web requests. Using JNDI is recommended in production for performance reasons, it allows deployers to monitor the database load thanks to tools such as LambdaProbe (see 25 Surveillance des applications).

To use JDBC to access the database even from web requests, set this property:

hibernate.useJndi=false

To use a connection pool set like this on Tomcat in the application context,

<Resource
    name="jdbc/esup-helpdesk"
    auth="Container"
    type="javax.sql.DataSource"
    username="admin" password="secret"
    driverClassName="com.mysql.jdbc.Driver"
    url="jdbc:mysql://localhost/rennes1-20080905?autoReconnect=true"
    maxActive="100" maxIdle="10" maxWait="10000"
    poolPreparedStatements="true" validationQuery="SELECT 1"
    removeAbandoned="true" removeAbandonedTimeout="60"
    logAbandoned="true" />

Tell the application the name of the pool:

hibernate.useJndi=true
hibernate.connection.jndi.datasource=jdbc/esup-helpdesk

The application automatically detects its running mode (batch or web) to use JDBC (batch) or JNDI (web).

JDBC connector

esup-helpdesk is configured by default to use MySql, it embeds the MySql connector for Java (mysql-connector-java.jar). To connect to another database manager:

• use the JDBC driver and the Hibernate dialect that corresponds to your database manager,
• add the corresponding connector to the /webapps/WEB-INF/lib folder*,*
• allow the automatic recovering of this file when upgrading (see Recovering previous configuration and customizations when upgrading).

See: The Hibernate documentation

MySql

The MySql connector is embedded by default in the distribution.

Postgres

• Version 7.4:  pg74.1jdbc3.jar
• Version 8.2: postgresql-8.2-506.jdbc3.jar

Connectors for Postgres can be downloaded from http://jdbc.postgresql.org/download.html.

Oracle