How does WebLogic know it needs XA transaction?

I've been informed that Weblogic 8.1 "knows" whether it needs to start a global XA transaction or not when it starts a transaction...sparing the overhead of an XA transaction if it is not needed.
Is this a true statement?...and if so...how does it know that distributed resources will be used in the transaction when it is starting the transaction?
The main reason I ask is that we are wondering if there is any way to avoid using the XA driver for "every" transaction, when we only need it less than 1% of the time. We would like to avoid the overhead that is introduced with XA.

WebLogic always performs XA operations, it looks at the resource and checks if it implements the XAResource interface, if it does it uses the XA operations with that resource otherwise the operations will just be a null op.
So it depends on what resources you use in the tx. If you mix, XA and Non-XA resources in the tx, you may hit heuristic exceptions and inconsistentcies in your data which you will have to manually correct. Also you loose the ability to recover any transactions.

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Hello,
How does Oracle know that the datafiles are inconsistent and db needs recovery when rebuilding the db off of the online/hot backups? Whereas, it doesn’t ask for recovery when rebuilding the database from cold backup (I understand that, for cold backup, database is shutdown immediate and hence the db is consistent). In both scenarios, a new control file is created (that means it won’t have SCN) and only datafile header will have the SCN. What’s that piece of info that oracle check to know if the database is consistent or inconsistent during the backup restore and recovery and where that info resides?
Thank you for any hints and answers.
Jay

Oracle uses the datafiles to identify if they are consistent. If the datafiles backup was taken when the database was OPEN, they are marked as "fuzzy" in the header. Also, likely, the Checkpoint SCNs may be different if tablespace checkpoints (e.g. by ALTER TABLESPACE BEGIN BACKUP) are at different points in time.
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HT5243 How does one know if they use "java applets"? What do they do? How will I know if I need to 'disable the java web plug-in browser' if I do not use them? ( I'm not very literate in computer-speak.

How does one know if they use "java applets"? What do they do? How will I know if I need to 'disable the java web plug-in browser' if I do not use them? (Obviously I'm not very literate in computer-speak.)

Well, when you go to a web page a section of the web page will have a coffee cup picture where the java applet will run. The applet loads then runs. If you are not seeing this behavior then you are not using java. If it make you feel more comfortable then disable the browser java plugin. On my machine I have not disable java- but you
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How does j_security_check know which page to redirect to?

Hi All,
I have implemented j_security_check in our weblogic web app successfully.
What I would like to know is following the authentication and authorization via the container, how does it know to redirect the user to index.jsp?
For example, we have login.jsp which contains the j_username and j_password fields, and the action is j_security_check. After the user hits submit and the container authenticates them, how does it know to then direct them to index.jsp? Is it because the welcome tag in web.xml is set up to direct them to index.jsp?
<welcome-file-list>
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</welcome-file-list>
Thats the only thing i can think of!
Thanks in advance.

That's correct.
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Second question: How do you guys keep track of packages that weren't installed via the AUR? For example, if you want to hack on a project and use that hacked copy instead of the one available in the repos, what do you usually do? I'm guessing that I should let pacman keep track of those by creating pkgbuilds for them, naming them something like [packagename]-[version]-myown, and noting that it conflicts with the package in the Arch repos... is this correct?

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How does one know whether or not they use "Java applets"?

The support doc for the recent Java update (Update 8, for Snow Leopard), entitled "About Java for Mac OS X 10.6 Update 8," advises the following:
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How does one know whether or not they use "Java applets"?
Thanks.
URL: http://support.apple.com/kb/HT5243

K.S. wrote:
dymar wrote:
Also, how would I know that a missing applet was causing some feature(s) not to work in a situation where no error mesage was returned?
Sometimes you have to dig to find out: http://earthnow.usgs.gov/earthnow_app.html
doesn't tell you directly, but it is mentioned in the FAQ that Java is required. If the content is appropriate, you can always ask here.
Thanks. According to that webpage, my "Java is out of date." When an error message like that is returned, I guess it's clear that "it's a Java problem." Presumably, one would then just go to java.com and download the applet if he/she wanted to view the webpage.
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how does weblogic render shell?
below is my shell file fragment,
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Ellen,
I am not clear about your question.
User A will only see the data which is retrieved based on it's principal
name (I assume you use principal name as an argument to retrieve the data
from DB).
If you are using p13n cache make sure the principal name is part of the key.
Please provide more details if you see that I did not understand your
question.
Regards,
Michael Goldverg
"ellen" <[email protected]> wrote in message
news:3d6e46ef$[email protected]..
>
My application has multiple portlets which need to display very sensitiveuser
data.
These portlets read user principles from session (e.g. <weblogic:getproperty>)
and make calls to an EJB to retrieve data from database and display theseuser
specific data.
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the portlet at the exact same time, will user A see user B's data?
Any suggestions or general guide lines about synchronize in portal will bevery
helpful.
Thanks,
Ellen
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Hi;
Thanks for sharing
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How does weblogic render shell?

Hi,
how does weblogic render shell?
below is my shell file fragment,
<netuix:head/>
<netuix:body>
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If I set any request attribute in head.jsp or pageHeader.jsp, will it be available in topMenu.jsp or leftMenu.jsp?

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How does WebLogic know it needs XA transaction?

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