0 Replies Latest reply on Jun 14, 2007 4:27 PM by Roohbir Singh

    accessing a database in jboss

    Roohbir Singh Newbie

      Hi,

      I have a small application where I access a database using ejb with jsp/servlets. The application is working ok but I have a question about the mysql-ds.xml file and ejb-jar.xml file.

      I have pasted the 2 files below. The thing is at the moment I have specified the name of the database in mysql-ds.xml. I would like to state this name in the ejb-jar.xml file so that I do not have to change the name of the database everytime I have to access one.

      Shall be thankful if somebody could advise me.

      Ros

      ejb-jar.xml

      <?xml version="1.0" encoding="UTF-8"?>
      <!DOCTYPE ejb-jar PUBLIC "-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 2.0//EN" "http://java.sun.com/dtd/ejb-jar_2_0.dtd">

      <ejb-jar>
      Customer Info Stateless Session Bean Application
      <display-name>Customer Info Stateless Session Bean</display-name>
      <enterprise-beans>

      <ejb-name>CustomerInfoStateless</ejb-name>
      com.ejb.CustomerInfoStatelessHome
      com.ejb.CustomerInfoStateless
      <ejb-class>com.ejb.CustomerInfoStatelessBean</ejb-class>
      <session-type>Stateless</session-type>
      <transaction-type>Container</transaction-type>
      <resource-ref>
      This is a reference to a JDBC database.
      <res-ref-name>java:/MySqlDS</res-ref-name>
      <res-type>javax.sql.DataSource</res-type>
      <res-auth>Container</res-auth>
      </resource-ref>

      </enterprise-beans>
      </ejb-jar>

      mysql-ds.xml

      <?xml version="1.0" encoding="UTF-8"?>

      <!-- $Id: mysql-ds.xml 41016 2006-02-07 14:23:00Z acoliver $ -->
      <!-- Datasource config for MySQL using 3.0.9 available from:
      http://www.mysql.com/downloads/api-jdbc-stable.html
      -->


      <local-tx-datasource>
      <jndi-name>MySqlDS</jndi-name>
      <connection-url>jdbc:mysql://localhost:3306/customerdb</connection-url>
      <driver-class>com.mysql.jdbc.Driver</driver-class>
      <user-name>root</user-name>

      <exception-sorter-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLExceptionSorter</exception-sorter-class-name>
      <!-- should only be used on drivers after 3.22.1 with "ping" support
      <valid-connection-checker-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLValidConnectionChecker</valid-connection-checker-class-name>
      -->
      <!-- sql to call when connection is created
      <new-connection-sql>some arbitrary sql</new-connection-sql>
      -->
      <!-- sql to call on an existing pooled connection when it is obtained from pool - MySQLValidConnectionChecker is preferred for newer drivers
      <check-valid-connection-sql>some arbitrary sql</check-valid-connection-sql>
      -->

      <!-- corresponding type-mapping in the standardjbosscmp-jdbc.xml (optional) -->

      <type-mapping>mySQL</type-mapping>

      </local-tx-datasource>