Re: [JBoss-user] How can I use a background process with JBoss
Hi. Interesting question... How about that you write a entry in database table after order processing with status. Now every struts action should check it and if order id matches order id of current user, it can notify him. This is server-pull, since you pull data from server and its only checked on clicks. You can simulate server push, in this way that client constanty checks throug .do - ejb- db for order processing status. After status is ok, it writes javascript message or redirects or something. For this you need frame or iframe and there javascript which every 15 seconds or something refreshes itself - to .do action of course. What do you think?
[JBoss-user] How can I use a background process with JBoss
Hi, I want to do the following: I have a ShoppingCart. The users clicks on order and the items from the ShoppingCart are moved to my OrderBean. ShoppingCart and OrderBean are EJB's. Now it comes to the problem. The order must be proccessed in background cause it will have a long durration. After the order has be proccessed the user should be notived somehow. How can I achieve this with JBoss and Struts ? What would be the best way to implement this Many thanks any any suggestions are welcome!!! ___ JBoss-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-user
RE: [JBoss-user] How can I use a background process with JBoss
a message bean can be a good idea...
send an XML or text message to your message EJB,
which will process the request in it's own thread...
by the way, for long transactions, if you can avoid transactions
(by default they timeout in 30 seconds. you can change
that somewhere in the transaction config, but
anyway this is costly for the DB)
check the transaction mode used for the EJB...
using NotSupported for is interesting if their is no risk of
incoherence. note that such a non transactional bean
can call transactional EJB (Required TX mode for example).
each independent method call will be either Commit'ed or Rollback'ed...
If you don't have Message EJB, you can try to add a Thread'able object
in the Servlet context. I did it on Websphere
to scan mail...
then, either use the load-on-startup elemnt in web.xml
or explicitly start and stop...
as far as I understand servler context guaranty that
only one instance of the thread is used
you may also look about non HTTP servlet
which may respond to any protocol...
or even to soap clients...
-Message d'origine-
De: Dirk Storck [mailto:[EMAIL PROTECTED]]
Date: mercredi 13 février 2002 14:17
À: Jboss User (E-Mail); Struts User (E-Mail)
Objet: [JBoss-user] How can I use a background process with JBoss
Hi,
I want to do the following:
I have a ShoppingCart.
The users clicks on order and the items from the ShoppingCart
are moved to
my OrderBean. ShoppingCart and OrderBean are EJB's.
Now it comes to the problem. The order must be proccessed in
background
cause it will have a long durration.
After the order has be proccessed the user should be notived somehow.
How can I achieve this with JBoss and Struts ? What would be
the best way to
implement this
package fr.cdc.idt.receivemail;
/**
* Insérez la description du type ici.
* Date de création : (04/01/02 12:10:45)
* @author:
*/
import java.util.Date;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;
import fr.cdc.idt.sendmail.*;
public class ReceiveMailServlet extends javax.servlet.http.HttpServlet {
/**
* Free any resources the servlet has acquired
* that will not be garbage collected.
*/
public void destroy() {
System.out.println(getClass().getName()+#destroy());
ServletContext cnt=getServletContext();
Object cobj=cnt.getAttribute(mailPollBean);
if(cobj!=null){
ReceiveMailPollBean
mailPollBean=(ReceiveMailPollBean)cobj;
System.out.println(getClass().getName()+#destroy() bean stop);
mailPollBean.stop();
System.out.println(getClass().getName()+#destroy()
removeattribute);
cnt.removeAttribute(mailPollBean);
}
super.destroy();
}
/**
* Process incoming HTTP GET requests
*
* @param request Object that encapsulates the request to the servlet
* @param response Object that encapsulates the response from the servlet
*/
public void doGet(javax.servlet.http.HttpServletRequest request,
javax.servlet.http.HttpServletResponse response) throws
javax.servlet.ServletException, java.io.IOException {
performTask(request, response);
}
/**
* Process incoming HTTP POST requests
*
* @param request Object that encapsulates the request to the servlet
* @param response Object that encapsulates the response from the servlet
*/
public void doPost(javax.servlet.http.HttpServletRequest request,
javax.servlet.http.HttpServletResponse response) throws
javax.servlet.ServletException, java.io.IOException {
performTask(request, response);
}
/**
* Returns the servlet info string.
*/
public String getServletInfo() {
return super.getServletInfo();
}
/**
* Initializes the servlet.
*/
public void init() {
// insert code to initialize the servlet here
}
/**
* Initializes the servlet.
*/
public void init(ServletConfig cnf) throws ServletException {
// insert code to initialize the servlet here
super.init(cnf);
ServletContext cnt = cnf.getServletContext();
//String mailhostParm = cfg.getInitParameter(mailhost);
ReceiveMailPollBean mailPollBean = new ReceiveMailPollBean();
ReceiveMailBean receiveBean = mailPollBean.getReceiveMailBean();
receiveBean.setUserName(testportail);
receiveBean.setPassword(testportail);
receiveBean.setStoreType(imap);
receiveBean.setFolderName(INBOX);
receiveBean.setHostName(tsexchange.idt.cdc.fr);
AttachmentAdapter attachementListener = new AttachmentAdapter() {
public void onAttachement(AttachmentEvent event) {
/* do the job */
}
};
receiveBean.addAttachmentListener(attachementListener);
mailPollBean.setPollingInterval(1000 * 30);
mailPollBean.start();
// Thread.currentThread().sleep(1000*30);
//mailPollBean.stop();
cnt.setAttribute(mailPollBean, mailPollBean
Re: [JBoss-user] How can I use a background process with JBoss
why not just send the user an email after the order has been processed? you could process the order using a message-driven bean that sends an email when completed, since you won't know if the user is still available after processing the order. HTH On Wed, 13 Feb 2002 14:16:36 +0100, Dirk Storck wrote: How can I achieve this with JBoss and Struts ? What would be the best way to implement this ___ JBoss-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-user
Re: [JBoss-user] How can I use a background process with JBoss
It looks like you would need Message Driven Beans. Read O'Reilly's Enterprise JavaBeans 3rd. Edition. And check JBoss 3.0.0alpha documentation: http://www.jboss.org/online-manual/HTML/ch08s20.html Greetings, Ricardo Arguello - Original Message - From: Dirk Storck [EMAIL PROTECTED] To: Jboss User (E-Mail) [EMAIL PROTECTED]; Struts User (E-Mail) [EMAIL PROTECTED] Sent: Wednesday, February 13, 2002 8:16 AM Subject: [JBoss-user] How can I use a background process with JBoss Hi, I want to do the following: I have a ShoppingCart. The users clicks on order and the items from the ShoppingCart are moved to my OrderBean. ShoppingCart and OrderBean are EJB's. Now it comes to the problem. The order must be proccessed in background cause it will have a long durration. After the order has be proccessed the user should be notived somehow. How can I achieve this with JBoss and Struts ? What would be the best way to implement this Many thanks any any suggestions are welcome!!! ___ JBoss-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-user ___ JBoss-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-user
AW: [JBoss-user] How can I use a background process with JBoss
I can't use MessageDrivenBeans cause we have to use EJB1.1 -Ursprüngliche Nachricht- Von: Edward Q. Bridges [mailto:[EMAIL PROTECTED]] Gesendet: Mittwoch, 13. Februar 2002 14:54 An: [EMAIL PROTECTED]; Jboss User (E-Mail) Betreff: Re: [JBoss-user] How can I use a background process with JBoss why not just send the user an email after the order has been processed? you could process the order using a message-driven bean that sends an email when completed, since you won't know if the user is still available after processing the order. HTH On Wed, 13 Feb 2002 14:16:36 +0100, Dirk Storck wrote: How can I achieve this with JBoss and Struts ? What would be the best way to implement this ___ JBoss-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-user
Re: AW: [JBoss-user] How can I use a background process with JBoss
JBoss 2.4.4 is EJB 1.1 but also has MessageDrivenBeans. -- Dirk Storck wrote: I can't use MessageDrivenBeans cause we have to use EJB1.1 -Ursprüngliche Nachricht- Von: Edward Q. Bridges [mailto:[EMAIL PROTECTED]] Gesendet: Mittwoch, 13. Februar 2002 14:54 An: [EMAIL PROTECTED]; Jboss User (E-Mail) Betreff: Re: [JBoss-user] How can I use a background process with JBoss why not just send the user an email after the order has been processed? you could process the order using a message-driven bean that sends an email when completed, since you won't know if the user is still available after processing the order. HTH On Wed, 13 Feb 2002 14:16:36 +0100, Dirk Storck wrote: How can I achieve this with JBoss and Struts ? What would be the best way to implement this ___ JBoss-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-user ___ JBoss-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-user
Re: [JBoss-user] How can I use a background process with JBoss
Hi, Am Mittwoch, 13. Februar 2002 14:16 schrieb Dirk Storck: Hi, I want to do the following: I have a ShoppingCart. The users clicks on order and the items from the ShoppingCart are moved to my OrderBean. ShoppingCart and OrderBean are EJB's. It's funny to see how everyone is working on similar problems (even the names of my classes are the same :) ). Now it comes to the problem. The order must be proccessed in background cause it will have a long durration. After the order has be proccessed the user should be notived somehow. The EJB spec. doesn't allow threads, so I think you will have to use message driven beans (MDB, belongs to EJB 2.0). The notification could be done via email. How can I achieve this with JBoss and Struts ? What would be the best way to implement this I haven't used MDB's yet, but the trick is to start a time consuming operation with a MDB and let it notify you when it's ready; your Struts action class would simply start the thing and return. Joachim -- Dipl.-Ing. Joachim Schaaf | Projektleiter | mailto:[EMAIL PROTECTED] cataloom AG | Eupener Str. 148 | 50933 Köln | http://cataloom.com/ Tel: +49 221 4851807 | Fax: +49 221 4851907 | Mobil-Tel: +49 170 7667807 ___ JBoss-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-user
AW: [JBoss-user] How can I use a background process with JBoss
But I must have access to the filesystem for copying purpose. How about using MBean's for that ? Can they be access as normal Beans ? -Ursprüngliche Nachricht- Von: Rajeshwar Rao V [mailto:[EMAIL PROTECTED]] Gesendet: Mittwoch, 13. Februar 2002 16:23 An: Ricardo Argüello; [EMAIL PROTECTED]; Jboss User (E-Mail) Betreff: RE: [JBoss-user] How can I use a background process with JBoss Message Beans are the best option... If not use Scheduler in JBoss. -Original Message- From: Ricardo Argüello [mailto:[EMAIL PROTECTED]] Sent: Wednesday, February 13, 2002 7:39 PM To: [EMAIL PROTECTED]; Jboss User (E-Mail) Subject: Re: [JBoss-user] How can I use a background process with JBoss It looks like you would need Message Driven Beans. Read O'Reilly's Enterprise JavaBeans 3rd. Edition. And check JBoss 3.0.0alpha documentation: http://www.jboss.org/online-manual/HTML/ch08s20.html Greetings, Ricardo Arguello - Original Message - From: Dirk Storck [EMAIL PROTECTED] To: Jboss User (E-Mail) [EMAIL PROTECTED]; Struts User (E-Mail) [EMAIL PROTECTED] Sent: Wednesday, February 13, 2002 8:16 AM Subject: [JBoss-user] How can I use a background process with JBoss Hi, I want to do the following: I have a ShoppingCart. The users clicks on order and the items from the ShoppingCart are moved to my OrderBean. ShoppingCart and OrderBean are EJB's. Now it comes to the problem. The order must be proccessed in background cause it will have a long durration. After the order has be proccessed the user should be notived somehow. How can I achieve this with JBoss and Struts ? What would be the best way to implement this Many thanks any any suggestions are welcome!!! ___ JBoss-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-user ___ JBoss-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-user ___ JBoss-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-user
Re: AW: [JBoss-user] How can I use a background process with JBoss
Dirk Storck wrote: But I must have access to the filesystem for copying purpose. How about using MBean's for that ? Can they be access as normal Beans ? As much as the spec says you shouldn't do io from EJBs, technically you still can (though I'm not advocating it ;) ). I tried it once and both JBoss and WebLogic didn't stop me. I'm guessing there would have to be some ClassLoader or security magic to keep you from using anything in java.io, but in practice I doubt anybody does that. AFAIK, they don't want you to do io because 1) io can block forever, and 2) the filesystem isn't transactionally managed. I'm not sure if there's stuff in JDK 1.4's new nio package that can address the first point. There might also be a 3rd party product to address the second. Probably (as I think someone else already mentioned) as a .rar. David ___ JBoss-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-user
RE: AW: [JBoss-user] How can I use a background process with JBoss
-Message d'origine- some ClassLoader or security magic to keep you from using anything in java.io, but in practice I doubt anybody does that. the java.policy and the security manage should do that job AFAIK, they don't want you to do io because 1) io can block forever, and 2) the filesystem isn't transactionally managed. I'm not sure if there's stuff in JDK 1.4's new nio package that can address the first point. There might also be a 3rd party product to address the second. Probably (as I think someone else already mentioned) as a .rar. that is only an idea ... in a perfect J2EE world, all that is ner to the system, should be a JCA component (a .rar)... it could be a good tutorial for .rar developement... any volunteer ? ___ JBoss-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-user
Re: AW: [JBoss-user] How can I use a background process with JBoss
AFAIK, they don't want you to do io because 1) io can block forever, and 2) the filesystem isn't transactionally managed I don't know if you can do this with EJB: http://www.onjava.com/pub/a/onjava/2002/02/06/atomic.html ___ JBoss-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-user
