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Posted to soap-user@xml.apache.org by Rahul Kirthivasan <he...@yahoo.com> on 2001/04/18 19:52:47 UTC
OT: Polling Model Design Question for SOAP app
Hi All,
I am currently using Apache SOAP to send requests
to a java class that is deployed in Apache TOmCat
at a well defined URN endpoint.
My java object looks up a database table and then uses
this info to perform a huge task for every single row
in the table. Each of these tasks might take a long
time. So I decided to split the tasks by using some
kind of a thread pool approach with each thread
processing the tasks associated with a row.
I want to get the advantages of EJB. But I guess I
cannot use threads inside an EJB bean. What is the
best model for these kind of applications.
That is,
(1) Application should be capable of receiving SOAP
messges for certain settings.
(2) App uses a Polling kind of model by constantly
looking up the DB at regular intervals and performing
a long task for each row in the table. I want
parallelism by splitting the task between say multiple
threads.
How could this polling model be best deployed. Could
EJB be used in such a scenario ?
Thanks,
Rahul
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RE: Polling Model Design Question for SOAP app
Posted by Rahul Kirthivasan <he...@yahoo.com>.
Hi Fredric,
Thanks a lot for the pointers.
Fredric, once I invoke these individual
session beans from the MDB, do I have to
wait for control to return from each of the
Session beans. In other, words these Session
beans may each be allocated a long task to
do that I wouldn't want to wait for to complete.
So will control be immediately returned to
me once I relegate these taske to
a session bean ?.
Thanks,
Rahul
--- Frederic Jeanne <fj...@symetrx.com> wrote:
> Hello,
>
> We have the same problematic for our project. I
> recommend you to read
> the last EJB 2.0 specifications. In this last one a
> new kind of bean is
> introduced :
> This is the Message Driven Bean. This kind of bean
> can manage JMS Queues and
> so serve
> asynchrounously other session beans.
>
> You could have the following architecture :
> A SOAP MessageRouter handling one way SOAP message
> and accessing via JMS a
> Message Driven bean
> acting as a message listenner. This last one serve
> the other Session Beans
> (or entity ones).
> An other way is to create one MDB for one business
> treatement.
>
> For this you'll need an EJB 2.0 compliant
> application server. For exemple
> JBOSS app server.
> www.jboss.org. There is a chapter on the Message
> Driven Bean in the JBOSS
> documentation and an example
> of the implementation of a MDB JMS listener.
>
> Regards,
>
> FJ.
>
> -----Message d'origine-----
> De : Rahul Kirthivasan
> [mailto:heavensdoor123@yahoo.com]
> Envoye : mercredi 18 avril 2001 19:53
> A : soap-user@xml.apache.org
> Objet : OT: Polling Model Design Question for SOAP
> app
>
>
> Hi All,
>
> I am currently using Apache SOAP to send requests
> to a java class that is deployed in Apache TOmCat
> at a well defined URN endpoint.
>
> My java object looks up a database table and then
> uses
> this info to perform a huge task for every single
> row
> in the table. Each of these tasks might take a long
> time. So I decided to split the tasks by using some
> kind of a thread pool approach with each thread
> processing the tasks associated with a row.
>
> I want to get the advantages of EJB. But I guess I
> cannot use threads inside an EJB bean. What is the
> best model for these kind of applications.
> That is,
> (1) Application should be capable of receiving SOAP
> messges for certain settings.
> (2) App uses a Polling kind of model by constantly
> looking up the DB at regular intervals and
> performing
> a long task for each row in the table. I want
> parallelism by splitting the task between say
> multiple
> threads.
>
> How could this polling model be best deployed. Could
> EJB be used in such a scenario ?
>
> Thanks,
> Rahul
>
> __________________________________________________
> Do You Yahoo!?
> Yahoo! Auctions - buy the things you want at great
> prices
> http://auctions.yahoo.com/
>
>
---------------------------------------------------------------------
> To unsubscribe, e-mail:
> soap-user-unsubscribe@xml.apache.org
> For additional commands, email:
> soap-user-help@xml.apache.org
>
>
>
---------------------------------------------------------------------
> To unsubscribe, e-mail:
> soap-user-unsubscribe@xml.apache.org
> For additional commands, email:
> soap-user-help@xml.apache.org
>
>
__________________________________________________
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http://auctions.yahoo.com/
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RE: Polling Model Design Question for SOAP app
Posted by Rahul Kirthivasan <he...@yahoo.com>.
Hi Fredric,
Thanks a lot for the pointers.
Fredric, once I invoke these individual
session beans from the MDB, do I have to
wait for control to return from each of the
Session beans. In other, words these Session
beans may each be allocated a long task to
do that I wouldn't want to wait for to complete.
So will control be immediately returned to
me once I relegate these taske to
a session bean ?.
Thanks,
Rahul
--- Frederic Jeanne <fj...@symetrx.com> wrote:
> Hello,
>
> We have the same problematic for our project. I
> recommend you to read
> the last EJB 2.0 specifications. In this last one a
> new kind of bean is
> introduced :
> This is the Message Driven Bean. This kind of bean
> can manage JMS Queues and
> so serve
> asynchrounously other session beans.
>
> You could have the following architecture :
> A SOAP MessageRouter handling one way SOAP message
> and accessing via JMS a
> Message Driven bean
> acting as a message listenner. This last one serve
> the other Session Beans
> (or entity ones).
> An other way is to create one MDB for one business
> treatement.
>
> For this you'll need an EJB 2.0 compliant
> application server. For exemple
> JBOSS app server.
> www.jboss.org. There is a chapter on the Message
> Driven Bean in the JBOSS
> documentation and an example
> of the implementation of a MDB JMS listener.
>
> Regards,
>
> FJ.
>
> -----Message d'origine-----
> De : Rahul Kirthivasan
> [mailto:heavensdoor123@yahoo.com]
> Envoye : mercredi 18 avril 2001 19:53
> A : soap-user@xml.apache.org
> Objet : OT: Polling Model Design Question for SOAP
> app
>
>
> Hi All,
>
> I am currently using Apache SOAP to send requests
> to a java class that is deployed in Apache TOmCat
> at a well defined URN endpoint.
>
> My java object looks up a database table and then
> uses
> this info to perform a huge task for every single
> row
> in the table. Each of these tasks might take a long
> time. So I decided to split the tasks by using some
> kind of a thread pool approach with each thread
> processing the tasks associated with a row.
>
> I want to get the advantages of EJB. But I guess I
> cannot use threads inside an EJB bean. What is the
> best model for these kind of applications.
> That is,
> (1) Application should be capable of receiving SOAP
> messges for certain settings.
> (2) App uses a Polling kind of model by constantly
> looking up the DB at regular intervals and
> performing
> a long task for each row in the table. I want
> parallelism by splitting the task between say
> multiple
> threads.
>
> How could this polling model be best deployed. Could
> EJB be used in such a scenario ?
>
> Thanks,
> Rahul
>
> __________________________________________________
> Do You Yahoo!?
> Yahoo! Auctions - buy the things you want at great
> prices
> http://auctions.yahoo.com/
>
>
---------------------------------------------------------------------
> To unsubscribe, e-mail:
> soap-user-unsubscribe@xml.apache.org
> For additional commands, email:
> soap-user-help@xml.apache.org
>
>
>
---------------------------------------------------------------------
> To unsubscribe, e-mail:
> soap-user-unsubscribe@xml.apache.org
> For additional commands, email:
> soap-user-help@xml.apache.org
>
>
__________________________________________________
Do You Yahoo!?
Yahoo! Auctions - buy the things you want at great prices
http://auctions.yahoo.com/
---------------------------------------------------------------------
To unsubscribe, e-mail: soap-user-unsubscribe@xml.apache.org
For additional commands, email: soap-user-help@xml.apache.org
RE: Polling Model Design Question for SOAP app
Posted by Frederic Jeanne <fj...@symetrx.com>.
Hello,
We have the same problematic for our project. I recommend you to read
the last EJB 2.0 specifications. In this last one a new kind of bean is
introduced :
This is the Message Driven Bean. This kind of bean can manage JMS Queues and
so serve
asynchrounously other session beans.
You could have the following architecture :
A SOAP MessageRouter handling one way SOAP message and accessing via JMS a
Message Driven bean
acting as a message listenner. This last one serve the other Session Beans
(or entity ones).
An other way is to create one MDB for one business treatement.
For this you'll need an EJB 2.0 compliant application server. For exemple
JBOSS app server.
www.jboss.org. There is a chapter on the Message Driven Bean in the JBOSS
documentation and an example
of the implementation of a MDB JMS listener.
Regards,
FJ.
-----Message d'origine-----
De : Rahul Kirthivasan [mailto:heavensdoor123@yahoo.com]
Envoye : mercredi 18 avril 2001 19:53
A : soap-user@xml.apache.org
Objet : OT: Polling Model Design Question for SOAP app
Hi All,
I am currently using Apache SOAP to send requests
to a java class that is deployed in Apache TOmCat
at a well defined URN endpoint.
My java object looks up a database table and then uses
this info to perform a huge task for every single row
in the table. Each of these tasks might take a long
time. So I decided to split the tasks by using some
kind of a thread pool approach with each thread
processing the tasks associated with a row.
I want to get the advantages of EJB. But I guess I
cannot use threads inside an EJB bean. What is the
best model for these kind of applications.
That is,
(1) Application should be capable of receiving SOAP
messges for certain settings.
(2) App uses a Polling kind of model by constantly
looking up the DB at regular intervals and performing
a long task for each row in the table. I want
parallelism by splitting the task between say multiple
threads.
How could this polling model be best deployed. Could
EJB be used in such a scenario ?
Thanks,
Rahul
__________________________________________________
Do You Yahoo!?
Yahoo! Auctions - buy the things you want at great prices
http://auctions.yahoo.com/
---------------------------------------------------------------------
To unsubscribe, e-mail: soap-user-unsubscribe@xml.apache.org
For additional commands, email: soap-user-help@xml.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: soap-user-unsubscribe@xml.apache.org
For additional commands, email: soap-user-help@xml.apache.org
RE: Polling Model Design Question for SOAP app
Posted by Frederic Jeanne <fj...@symetrx.com>.
Hello,
We have the same problematic for our project. I recommend you to read
the last EJB 2.0 specifications. In this last one a new kind of bean is
introduced :
This is the Message Driven Bean. This kind of bean can manage JMS Queues and
so serve
asynchrounously other session beans.
You could have the following architecture :
A SOAP MessageRouter handling one way SOAP message and accessing via JMS a
Message Driven bean
acting as a message listenner. This last one serve the other Session Beans
(or entity ones).
An other way is to create one MDB for one business treatement.
For this you'll need an EJB 2.0 compliant application server. For exemple
JBOSS app server.
www.jboss.org. There is a chapter on the Message Driven Bean in the JBOSS
documentation and an example
of the implementation of a MDB JMS listener.
Regards,
FJ.
-----Message d'origine-----
De : Rahul Kirthivasan [mailto:heavensdoor123@yahoo.com]
Envoye : mercredi 18 avril 2001 19:53
A : soap-user@xml.apache.org
Objet : OT: Polling Model Design Question for SOAP app
Hi All,
I am currently using Apache SOAP to send requests
to a java class that is deployed in Apache TOmCat
at a well defined URN endpoint.
My java object looks up a database table and then uses
this info to perform a huge task for every single row
in the table. Each of these tasks might take a long
time. So I decided to split the tasks by using some
kind of a thread pool approach with each thread
processing the tasks associated with a row.
I want to get the advantages of EJB. But I guess I
cannot use threads inside an EJB bean. What is the
best model for these kind of applications.
That is,
(1) Application should be capable of receiving SOAP
messges for certain settings.
(2) App uses a Polling kind of model by constantly
looking up the DB at regular intervals and performing
a long task for each row in the table. I want
parallelism by splitting the task between say multiple
threads.
How could this polling model be best deployed. Could
EJB be used in such a scenario ?
Thanks,
Rahul
__________________________________________________
Do You Yahoo!?
Yahoo! Auctions - buy the things you want at great prices
http://auctions.yahoo.com/
---------------------------------------------------------------------
To unsubscribe, e-mail: soap-user-unsubscribe@xml.apache.org
For additional commands, email: soap-user-help@xml.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: soap-user-unsubscribe@xml.apache.org
For additional commands, email: soap-user-help@xml.apache.org