<Context reloadable="true">
    <Resource name="jdbc/Oracle" auth="Container"
              type="javax.sql.DataSource"
              driverClassName="oracle.jdbc.driver.OracleDriver"
              url="jdbc:oracle:thin:@(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost)(PORT=1521)))(CONNECT_DATA=(SERVICE_NAME=oracledb)))"
              username="dbuser"
              password="db123"
              maxActive="150"
              maxIdle="120"
              maxWait="-1"/>
</Context>

@Resource(name = "jdbc/Oracle")
private DataSource dataSource;