Maintaining Transaction Across Multiple JSP Pages

          Hi,
          I have a multi page Registration (3 steps). On each step data submited is taken
          to the database via an EJB component (Session Bean). How do I maintain a transaction
          across these JSP pages so that the data in the database is consistent. If a there
          is a problem in the 3rd step the data submitted in the first two steps should
          be rolled back.
          How do I maintain transaction across multiple pages.
          Regards
          -MohanRaj

It will take from several minutes to a long time for a user to complete a multiple page registration process. Do you really have enough database connections that each concurrent user can hold on to one?
Usually you cannot open more than 50-200 connections to a database at any given time.
Remember that some users will abandon the registration process. Can you afford that their sessions holds a db conenction until the session times out?
Consider changing your datamodel so you can run and commit a transaction at the end of processing the form data from a page. Immediately after the commit give the db connection back to the pool inside the app. server.
It can be as simple as having a column in the database of type enum, with a set of values that shows how far in the registration process the registration has procesed.
BTW. if you absolutely have to hold on to the db connection, you can stuff it into a session scoped attribute and it will be available on all pages.

Similar Messages

Maintaining Transactions Across JSP Pages

Hi,
I have a multi page Registration (3 steps). On each step data submitted is taken
to the database via an EJB component (Session Bean). How do I maintain a transaction
across these JSP pages (i.e. either in the EJB or in the jsp) so that the data
in the database is consistent? So if there is a problem in the 3rd step the data
submitted in the first two steps should be rolled back.
Can I use a statefull session beans, which will maintain a database connection
created during the first step, so that I can use the same connection for steps
2 & 3. In the first step after getting the database connection I will begin a
transaction and insert the first part of the data, then this connection will be
maintained by the statefull session and used for steps 2 & 3. At the end I will
commit the transaction. Will this work?
How do I maintain transaction across multiple pages? Is there is any standards
for this scenario where the transaction is maintained across multiple pages. I
cannot carry data across the jsp pages because of the complex data collected.
Any help appreciated.
Regards
-MohanRaj

You can not and should not do it the way that you are proposing. Keeping a transaction
open across any interaction with the user is a big mistake. Transactions are scarce
resources. They need to be short. You will need to collect the data from the three
pages in the servlet itself. You can use the HTTPSession, or hidden fields in
the forms. Only after all of the data is collected should you begin a transaction
and update the database. Alternatively, you could store the partial data in a
temporary database table, and move it to a permanent table when all of the data
has been provided.

Using ATMI and tuxedo to institue distributed transactions across multiple DBs

I am creating the framework for a given application that needs to ensure that data
integrity is maintained spanning multiple databases not necessarily within an
instance of weblogic. In other words, I need to basically have 2 phase commit
"internet transactions" between a given coordinator and n participants without
having any real knowlegde of their internal system.
Originally I was thinking of using Weblogic but it appears that I may need to
have all my particular data stores registered with my weblogic instance. This
cannot be the case as I will not have access to that information for the other
participating sytems.
I next thought I would write my own TP...ouch. Everytime I get through another
iteration I kept hitting the same issue of falling into an infinite loop trying
to ensure that my coordinator and the set of participants were each able to perform
the directed action.
My next attempt has led me to the world of ATMI. Would ATMI be able to help me
here. Granted I am using JAVA so I am assuming that I would have to use CORBA
to make the calls but will ATMI enable me to truly manage and create distributed
transactions across multiple databases. Please, any advice at all would be greatly
appreciated.
Thanks
Chris

Andy
I will not have multiple instances of weblogic as I cannot enfore that
the other participants involved in the transaction have weblogic as
their application server. That being said, I may not have the choice
but to use WTC.
Does this make more sense?
Andy Piper <[email protected]> wrote in message news:<[email protected]>...
"Chris" <[email protected]> writes:
I am creating the framework for a given application that needs to ensure that data
integrity is maintained spanning multiple databases not necessarily within an
instance of weblogic. In other words, I need to basically have 2 phase commit
"internet transactions" between a given coordinator and n participants without
having any real knowlegde of their internal system.
Originally I was thinking of using Weblogic but it appears that I may need to
have all my particular data stores registered with my weblogic instance. This
cannot be the case as I will not have access to that information for the other
participating sytems.I don't really understand this. From 6.0 onwards you can do 2PC
between weblogic instances, so as long as the things you are calling
are transaction (EJBs for instance) it should all work out fine.
I next thought I would write my own TP...ouch. Everytime I get through another
iteration I kept hitting the same issue of falling into an infinite loop trying
to ensure that my coordinator and the set of participants were each able to perform
the directed action.
My next attempt has led me to the world of ATMI. Would ATMI be able to help me
here. Granted I am using JAVA so I am assuming that I would have to use CORBA
to make the calls but will ATMI enable me to truly manage and create distributed
transactions across multiple databases. Please, any advice at all would be greatly
appreciated.I don't see that ATMI would give you anything different. Transaction
management Tux is fairly similar to WebLogic (it was written by the
same people). If you are trying to do interposed transactions
(i.e. multiple co-ordinators) then WTC would give you this but it is
only a beta feature in WLS 6.1. Using Tux domain gateways would also
give you interposed behaviour but would require you write your servers
in C or C++ ....
andy

Using ATMI and tuxedo for distrubuted transactions across multiple DBs

          I am creating the framework for a given application that needs to ensure that data
          integrity is maintained spanning multiple databases not necessarily within an
          instance of weblogic. In other words, I need to basically have 2 phase commit
          "internet transactions" between a given coordinator and n participants without
          having any real knowlegde of their internal system.
          Originally I was thinking of using Weblogic but it appears that I may need to
          have all my particular data stores registered with my weblogic instance. This
          cannot be the case as I will not have access to that information for the other
          participating sytems.
          I next thought I would write my own TP...ouch. Everytime I get through another
          iteration I kept hitting the same issue of falling into an infinite loop trying
          to ensure that my coordinator and the set of participants were each able to perform
          the directed action.
          My next attempt has led me to the world of ATMI. Would ATMI be able to help me
          here. Granted I am using JAVA so I am assuming that I would have to use CORBA
          to make the calls but will ATMI enable me to truly manage and create distributed
          transactions across multiple databases. Please, any advice at all would be greatly
          appreciated.
          Thanks
          Chris


          I am creating the framework for a given application that needs to ensure that data
          integrity is maintained spanning multiple databases not necessarily within an
          instance of weblogic. In other words, I need to basically have 2 phase commit
          "internet transactions" between a given coordinator and n participants without
          having any real knowlegde of their internal system.
          Originally I was thinking of using Weblogic but it appears that I may need to
          have all my particular data stores registered with my weblogic instance. This
          cannot be the case as I will not have access to that information for the other
          participating sytems.
          I next thought I would write my own TP...ouch. Everytime I get through another
          iteration I kept hitting the same issue of falling into an infinite loop trying
          to ensure that my coordinator and the set of participants were each able to perform
          the directed action.
          My next attempt has led me to the world of ATMI. Would ATMI be able to help me
          here. Granted I am using JAVA so I am assuming that I would have to use CORBA
          to make the calls but will ATMI enable me to truly manage and create distributed
          transactions across multiple databases. Please, any advice at all would be greatly
          appreciated.
          Thanks
          Chris

The best way of carrying the search string across different jsp pages?

I heard about transfer object. What about carrying object with session for different pages.
Please suggest me the best approach to
carry the search string across different jsp pages?
thanks
vijendra

I doubt its possible even with a fancy HTML widget, although the last iBA update now allows links to other books.

MAintain session across multiple DB Adapters.

Hi,
I am using a BPEL process which has multiple DB Adapters.
As far as I understand each DB Adapter call from BPEL is a different session.
Is there any way to maintain a same session across multiple DB Adapter calls i.e to make multiple DB calls in the same session?
thanks,
CD

Yes this is supported.
You'll have to take a look at the support for XA (distributed transactions).
See this thread for some good links to other info.
Re: DB Rollback Questions for 10.1.3.1 and 10.1.3.3

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will i be able to use Response.getParameter in the page residing in the other server?

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hi,
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geetha

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We use javascript to pass values between a 'data look up' window and the originating Servlet. If this is of any use, I can send you some examples.

Transaction across multiple databases in the same BDB environment

Hi,
I have multiple databases and one metadata database all in the same BDB environment. At runtime I want to create an additional database, update this database and update the metadata database in the same environment under one transaction. Are there any issues in having transactions that span multiple databases in the same environment?
Thanks,
Pooja

There is virtually no difference between using multiple databases and a single database in a transaction. Concurrency is determined by other factors such as whether multiple threads access the same records. See the Writing Transactional Applications for more information:
http://www.oracle.com/technology/documentation/berkeley-db/je/TransactionGettingStarted/index.html
--mark

Maintaining sync across multiple audio tracks

In the timeline I have a single video track with some sync images and some B-roll images that float against the soundtracks. I have 8 audio tracks, some in sync with different video clips some not. I've trimmed one B-roll video clip and deleted a portion of it.
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Used to be when cutting motion picture film multitracks we could delete an equal amount of fill from each track at different points for each so the overall sync stays the same.
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Doing these kinds of edits would seem to be standard for all kinds of docs and narratives but I can't find anything in the documentation except how to delete the same portions of tracks at the same edit points across all tracks.
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Robert

It's not clear to me exactly what you're trying say, but that's probably because didn't go to school for this... I'm pretty sure I know how to cut multiple audio and video tracks because I've been doing it since FCP3. No matter how you express it, the facts remain:
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ps: I also drive a manual shift car and navigate with a printed map... it just works.

Problems with counter in renaming interface not maintaining consistency across multiple libraries

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hallerphoto wrote:
Machine is a Mac Pro dual quad-core 2.16 GHz.
I am unaware of a 2.16 GHz Mac Pro tower. Are you referring to a Macbook Pro or to an iMac? Or is it a configuration I am just unaware of?
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You did not mention RAM, which has defining impact on Aperture performance.
Even if no hardware upgrades are made, it is useful to know what hardware performance bottlenecks may exist. So some questions:
• Which Mac(s), exactly?
• Which OS version and which Aperture version?
• How much RAM is on board?
• If a Mac Pro, which GPU card is in use?
• What mass storage (hard drives and SSDs), how connected and how full?
Thanks.
-Allen

Maintaining session across multiple browsers

Hello All,
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How to maintain more users in jsp page

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k_paramesh wrote:
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Maintaining Transaction Across Multiple JSP Pages

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