Thanks for the input. The default scope is Singleton anyway. Also I am not
calling getStartUPService() method in my application. I have deleted this
method. But keeping the scope to singleton and init-method="init". The init
method is called twice. Not able to figure that out.
I know something is messed up. It should not be doing that. But I am not
able to figure that out. I hope you understand my confusion.
Sameer.
Chris Pratt wrote:
>
> Umm, no I'm saying let Spring manage the singleton, you don't need to do
> it
> yourself. Especially since the original question was how to have it
> created
> at initialization time. If you remove scope=prototype, it won't be
> auto-created for you, and you will have defeated the whole point.
> (*Chris*)
>
> On Tue, Jul 13, 2010 at 12:36 PM, hisameer
> <cool_sameer_fo...@yahoo.com>wrote:
>
>>
>> So basically you are saying is that remove scope="singleton" right?
>>
>>
>> Chris Pratt wrote:
>> >
>> > 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_fo...@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_fo...@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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>> >
>>
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