Hi, > What are the ways to handle transactions in Tomcat ?. No EJB here. I >use >Tomcat standalone. I am using JDBC calls to manage DB. I had used
There are a couple of ways. One is to roll them yourself: add jta.jar (Java Transaction API, downloadable from Sun) and your implementation of choice (e.g. Tyrex) to WEB-INF/lib, and go read a JTA tutorial. This way is not hard, it's portable, and as a bonus you would be able to test your transaction code from unit tests as it won't depend on the servlet container. The other way is to use Tomcat's JNDI provider. The J2EE spec requires Tomcat to provide a UserTransaction (see the JTA docs) factory via JNDI. Tomcat 4.x used Tyrex for this, see http://jakarta.apache.org/tomcat/tomcat-4.1-doc/jndi-datasource-examples -howto.html#Tyrex%20Connection%20Pool. Tomcat 5 doesn't use Tyrex as the project seems to be dead: http://tyrex.sourceforge.net/#News. So you have to pick another JTA implementation and follow the guide for using a the JNDI factory (http://jakarta.apache.org/tomcat/tomcat-5.5-doc/index.html), using the org.apache.naming.factory.UserTransactionFactory. Finally, you could simply use an external transaction manager. This solution is usually worthwhile only for mission-critical (as in someone will die if it fails) or very large installation, because these enterprise-grade transaction managers tend to be very expensive and complex. However, recently things like JOTM (ObjectWeb) have really grown into their own, so you might wish to investigate it. The downsides to using container- or externally-provided transaction manager are that you need to learn the configuration syntax, and that unit-testing is more difficult. Yoav This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
