To create a datasource and a connection pool to help you use databases in your project, edit the $GLASSFISH_HOME/glassfish/domains/[domain_name]/config/domain.xml file. Inside the <resources> node, insert a child node like this one:
<jdbc-connection-pool pool-resize-quantity="4" max-pool-size="64" max-wait-time-in-millis="120000" driver-classname="com.mysql.jdbc.Driver" datasource-classname="com.mysql.jdbc.jdbc2.optional .MysqlDataSource" steady-pool-size="16" name="MysqlPool" idle-timeout-in-seconds="600" res-type="javax.sql.DataSource"> <property name="databaseName" value="database"></property> <property name="serverName" value="[host]"></property> <property name="user" value="user"></property> ...
