Running a J2EE project on WAS at a regular interval

Question

I am going create a EJB project to poll (or check) any change in a DB and do some business logic or mapping everytime when the DB is changed. So, my question is how I can configure this project to run at a regular interval, says 5 mins?
Since my WebSphere is running on J2EE 1.3 so I cannot use Timer approach which is available on EJB running on J2EE 1.4.
Also, no client is needed to invoke the program, meaning that there is no client to call the remote interface of EJB

Answer 1

Ok, you have your servlet defined, but now you should map it using mapping tags. Try editing your web.xml file as follows (adding mapping):
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.4" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
  <display-name>EmpDtlsWarDisp</display-name>
  <servlet>
    <display-name>EmpDtlsWebDisp</display-name>
    <servlet-name>EmpDtlsWebComp</servlet-name>
    <servlet-class>tshot.EmpDtls</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>EmpDtlsWebComp</servlet-name>
    <url-pattern>/EmpDtls</url-pattern>
  </servlet-mapping>
</web-app>Note the adding of "tshot." in front of your EmpDtls in your servlet-class tag.
This means you need to create a directory in your src location called "tshot", move your EmpDtls.java into the new directory, and then edit that java file, placing the following line at the top of it:
package tshot;Once you have re-built and re-deployed this you should be able to access your servlet at:
http://localhost:8080/EmpDtlsCx/EmpDtls
Refactoring is a term used to mean you've decided to change the name of a variable, method or some alteration of your java file such as changing package names (or adding to a package in this case) whereby the results may or may not affect other classes which depend on this class. Typically, nowadays refactoring is usually done by selecting a refactoring command from a menu item or button within an IDE (Integrated Development Environment) whereby the IDE performs all of the dependancy checking for you and copies the change to affected areas where necessary. Thus, all you need to do is choose the right refactoring operation and click "Ok" in most cases. In the old days, you would have to keep track of all affected areas and manually edit where necessary, based on your imposed change.