But how would be interupt the running process? In other words, he says that
another thread could set the boolean value to keep running to be false.
Since EJB forbids concurrent access to the bean, he can spawn all the client
threads he wants, but only one thread at a time can be running in the
session bean. So its impossible to interrupt the process.
Dave Wolf
Internet Applications Division
Sybase
> -----Original Message-----
> From: A mailing list for Enterprise JavaBeans development
> [mailto:[EMAIL PROTECTED]]On Behalf Of Francis Pouatcha
> Sent: Wednesday, September 13, 2000 11:43 AM
> To: [EMAIL PROTECTED]
> Subject: Re: Restarting facility in stateless bean
>
>
> Dave,
>
> Kristijan is using thread synch. primitives in the client code and not
> in the bean code. This isn't vorbidden.
>
> /Francis.
>
> Dave Wolf wrote:
> >
> > Kristan,
> >
> > Creating your own thread, using thread syncrhonization
> primitives etc are
> > all expressly forbidden in EJB. See section 18 of the EJB 1.1 spec.
> >
> > Dave Wolf
> > Internet Applications Division
> >
> > > -----Original Message-----
> > > From: A mailing list for Enterprise JavaBeans development
> > > [mailto:[EMAIL PROTECTED]]On Behalf Of Kristijan Cvetkovic
> > > Sent: Wednesday, September 13, 2000 7:25 AM
> > > To: [EMAIL PROTECTED]
> > > Subject: Re: Restarting facility in stateless bean
> > >
> > >
> > > Hello Ravi,
> > >
> > > > Is it possible to give a restart facility in stateless
> session bean ?
> > > >
> > >
> > > I think you could get some serious problems with stateless
> session beans
> > > (ssb). How do you want to suspend the exeution of
> executeRule()? And even
> > > when you can suspend it somehow you cannot be sure to get the
> same bean
> > > instance at the next method call because of pooling.
> > >
> > > > When a client selects executeRule from the screen, then
> this procedure
> > > > get activated. But I have to give a facility, through which
> client can
> > > stop
> > > > this process and restart it from the point (For ex: if
> client stops this
> > > > when
> > > > it processed 500 records, and when he restart the process, it
> > > should start
> > > > processing from 501 records).
> > >
> > > I would suggest to use statefull session beans. You could
> provide a number
> > > of files to be procced in the create method of that bean and
> your client
> > > code could look like this:
> > >
> > > WorkingBean bean = WorkingBeanHome.create(10);
> > >
> > > boolean done = false;
> > >
> > > // another thread could set it to true
> > > boolean suspended = false;
> > >
> > > while (!done) {
> > > (if !suspended) {
> > > done = bean.executeRule();
> > > } else {
> > > this.wait();
> > > }
> > > }
> > >
> > > bean.remove();
> > >
> > >
> > > Your BeanCode could look like this:
> > >
> > > ...
> > > private number = 0;
> > > private current = 1;
> > > ...
> > > public void ejbCreate(int n) {
> > > number = n
> > > }
> > >
> > > executeRule(){
> > >
> > > while (EOF && (current%numberer != 0)){
> > > read current record from file
> > > process it
> > > write back it to file
> > > }
> > >
> > > if (EOF) return true else false;
> > > }
> > >
> > > regards,
> > > --
> > > [EMAIL PROTECTED]
> > >
> > > MATHEMA Software GmbH
> > > N�gelsbachstra�e 25 b
> > > 91052 E r l a n g e n
> > > D e u t s c h l a n d
> > > Tel +49(0)9131/8903-0
> > > Fax +49(0)9131/8903-55
> > > http://www.mathema.de
> > >
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> >
> >
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> --
> [EMAIL PROTECTED]
>
> MATHEMA Software GmbH
> N�gelsbachstra�e 25 b
> 91052 E r l a n g e n
> D e u t s c h l a n d
> Tel +49(0)9131/8903-0
> Fax +49(0)9131/8903-55
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>
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