Then write a simple Java class that acts as a connection manager. Your business object uses a DAO (preferably by referring only to an interface so it's not affected when you switch data stores). Your DAO asks the connection manager for a connection, either via a static method or an instance method if you are using a singleton. Your connection manager uses a JNDI lookup to get a reference to the DataSource that was configured in your application's context XML file (use caching so that the lookup only has to happen once). Try to get a connection from the DataSource. If that fails, use DriverManager to get a connection so the application will work, but log the error and fix the DataSource. No. 1 problem is a JNDI lookup on the wrong name.
There is a MySQL example on this page:
http://jakarta.apache.org/tomcat/tomcat-5.5-doc/jndi-datasource-examples-howto.html
Erik
Scott Purcell wrote:
I have had some issues this past week, trying to come up with a way to cleanly connect to my, MySQL database. I know this is not necessarily a struts issue, but I am betting that there is no one on this list who is not using some type of database in the back-end.
Now I have the O'Reilly book on Struts, and using the ObjectRelationalBridge is a little too large for me to take on currently, same as Hibernate or anything else I would have to research thoroughly. I just need a solid, simple way to grab a connection from a pool, use it in a Business Object and call it a day. Since I am running on Tomcat 5.5, I have tried to incorporate the DBCP from jakarta into my struts stuff. Problem is most examples do not work, or are incomplete for the 5.5 Tomcat, and I cannot find any decent examples of doing this.
I am basically Running Mysql, and Tomcat 5.5, and struts 1.2. I really do not want to use the data-source in struts, as I intend to use a solution that will not be depreciated in the next release. Could anyone throw me a bone here. I have searched google to death for good examples, but come up with outdated examples, or incomplete. The examples for Tomcat make you use JNDI, and I am not sure if that is the way to go.
Any assistance would be sincerely appreciated.
Thanks, Scott
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