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From Chris Pratt <thechrispr...@gmail.com>
Subject Re: How to modify Struts2 start up process.
Date Tue, 13 Jul 2010 18:49:50 GMT
It's being called twice because, since you defined it as scope=singleton,
Spring is creating a singleton instance for you automatically on start-up.
Then your code is creating another instance in your getStartupService()
method.  You don't need to explicitly instantiate one, just let Spring
inject it where you need it.
  (*Chris*)

On Tue, Jul 13, 2010 at 11:42 AM, hisameer <cool_sameer_for_u@yahoo.com>wrote:

>
> Thanks for the suggestion. I have implemented it, but the issue is that the
> bean is called twice.I am using websphere server 6.1. Do you have any idea
> why its happening?
>
> Here is the code in ApplicationContext.xml
>
> <bean id="initBean" class="com.singleton.startup.service.StartUPService"
> scope="singleton" init-method="init">
>                <property name="flag" value="true" />
>                <property name="days" value="15" />
>        </bean>
>
>
> and StartUPService.java class looks like this:
> public class StartUPService implements ApplicationContextAware {
>
>        private static StartUPService ref;
>
>        private ApplicationContext ctx;
>
>        private static Logger logger =
> Logger.getLogger(StartUPService.class);
>
>        private boolean flag= true;
>
>        private ServiceDAO dao;
>
>        private int days= 15;
>
>        private StartUPService() {
>                // no code req'd
>        }
>
>        public static StartUPService getStartUPService() {
>
>                if (ref == null) {
>                        // it's ok, we can call this constructor
>                        ref = new StartUPService();
>                }
>                return ref;
>        }
>
>        public void init() {
>
>                if (ref == null) {
>                        // it's ok, we can call this constructor
>                        ref = new StartUPService();
>                        long startTime = System.currentTimeMillis();
>                        loadRequiredObject();
>                        long endTime = System.currentTimeMillis();
>                        logger.info("The Total time taken is: " + (endTime
> - startTime)
>                                        + " ms");
>                }
>
>        }
>
>  private void loadRequiredObject(){
>       if (dao== null) {
>                        dao= (ServiceDAO) ctx.getBean("daoBean");
>                }
>       //here I will do some processing using the database access using dao
> service layer
>     }
>
>
> satyanarayana katta wrote:
> >
> > Using the application level spring container would be sufficient with
> init
> > method set.
> >
> > Sent from my iPhone
> >
> > On Jun 25, 2010, at 11:36 AM, hisameer <cool_sameer_for_u@yahoo.com>
> > wrote:
> >
> >>
> >> Hi,
> >>
> >> I am using Struts2.1.6+Spring2.5.6+Hibernate+JPA in my web application.
> >> The
> >> application server is JBOSS5. I have to implement a logic so that when
> >> the
> >> server starts I can execute some database scripts using my DAO service
> >> layer. And this class is responsible loading some required variables
> from
> >> the database. The class should execute only one on the start up.
> >>
> >> Please give me some suggestions how to do this. If possible write some
> >> sample code.
> >>
> >> Thanks,
> >> Sameer
> >> --
> >> View this message in context:
> >>
> http://old.nabble.com/How-to-modify-Struts2-start-up-process.-tp28995322p28995322.html
> >> Sent from the Struts - User mailing list archive at Nabble.com.
> >>
> >>
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> >
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> >
> >
>
> --
> View this message in context:
> http://old.nabble.com/How-to-modify-Struts2-start-up-process.-tp28995322p29154226.html
> Sent from the Struts - User mailing list archive at Nabble.com.
>
>
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>

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