MySql connection with EJB2 project

Question

Hi Experts,
I’m new in net weaver. I developed a CMP bean using EJB2 project. Now I want to connect with a table which has in MySql database. In net weaver MAXDB,ORACLE etc… options are there, but MySql is not there. So pls help me for connecting MySql.
Thanks in Advance
Toji.

Answer 1

Hi Toji,
I am not sure you can achieve a Container Managed Persistence if the target database is on some other machine and especially for MySQL, since SAP has their own proprietary database called MaxDB which is also a free product from MySQL AB using which we cannot even achieve a Container Managed Persistence if it installed on another machine.
But you can achieve a Bean Managed Persistence for handling data in the MySQL database.For this,
1) First of all, based on the version of the MySQL you will have to download the appropriate JDBC driver for MySQL.
2) You will have to create an entry for the MySQL JDBC driver through Visual Administrator(access it from <Drive>:\usr\sap\<System ID>\JC<Instance Number>\j2ee\admin\go.bat  in the case of windows system).Here while creating the entry you will have to upload the downloaded JDBC driver.For this after login on to the Visual Administrator using the user with admin right, you will have to navigate upto,
             Server->Services->JDBC Connector.
3) You will have to create one Data Source. Here you will have to mention the application name , Data Source name, Driver Name( u have to select the earlier created Driver here) , Alias name, JDBC Version, Drive class, Database URL , Username and Password.
The Driver name and Database URL u will have to mention like this.
Driver Name -> com.mysql.jdbc.Driver
URL            -> jdbc:mysql://<database name>
4) In the BMP bean, you can look up the datasource like,
InitialContext ctx = new InitialContext();
DataSource ds = (DataSource) ctx.lookup("jdbc/<DataSource Alias Name mentioned while creating datasource in Visual Administrator>");
Using this DataSource instance, you can create connection and execute queries.
Just refer this help for getting knowledge on Driver creation and DataSource creation for MaxDB.
http://help.sap.com/saphelp_nw04s/helpdata/en/42/073e1d0ab7540fe10000000a114cbd/content.htm
Regards,
Kishor Gopinathan