Question about multiple RequiresNew in Entity Bean transaction

Hi I've got a problem concerning transactions:
In both cases I've got a CMP Entity Bean called "Account" with some mothods like
increaseBalance(double amount)
decreaseBalance(double amount)
transferMoney(double amount)
for all methods the TransactionAttribute is "RequiresNew". When calling first decreaseBalance(amount) and afterwords
increaseBalance(amount), bothfrom within transferMoney(amount). When setting entityContext.RollbackOnly()
I would expect this rollback doesn't undo my changes because they are in a different transaction, which has been comitted
when the methods finished, but both are rolled back.
I thought there are no "nested transactions" in J2EE. Isn't this one?
Thanks!
Martin

Ahhhh! Right! If I call "this.increase(balance)" from the AccountBean method "transferMoney", the container has no chance to create a new transaction, so the same transaction as in "transferMoney" is used. I didn't think about that, but of course...
So one should never call a bean method directly even when it is a method of the same instance the thread is currently in.
Thanks a lot!

Similar Messages

Multiple users accessing entity bean with same PK

Hi,
Some body please clarify the below issue.
(EJB 1.1, WAS3.5)
I have two app servers and two clones each clone is running in each app server.
Stateful session bean access Entity beans to update/read record in the database.
According to my requirement multiple users can access the same entity data (same primary key). Suppose user A created a Stateful session bean SB1 and the SB1 created Entity1 with PK1, this is happening at clone1.
User B accessed the site and the request went to Clone2 and a new SB2 created, but the SB2 need to access the database with Same PK1.
For the above situation, I guess container can not create a new Entity bean with PK1 because EB with PK1 is already there and it tries to allocate same EB1 with SB2, so if two requests are concurrent do the SB2 wait to get the handle of the EB1?
Is there any way to create two Entity beans with same Primary Key at the same time but in different clone?
Thanks,
Sagar

Hi,
The concurrency level has to be set at the level of database and the database will take care of consistency & integrity of the data. So specity the concurrency level on the database connection in each appserver.

I bought a Canon 8400F scanner- question about multiple photos being scanne

Hi,
I have a question about about scanning photos. It was posted that if you scan something with multiple photos, it will separate the pictures.
If I put 6 pictures on the scanner, will it automatically scan them and separate them, or is there something in the software where I select it to separate each picture.
Thank you

I'm not at my Mac right now but it should be real obvious in the CanoScan software. Open it up and play around. It will jump out at you.
You don't tell it to select "each" picture. You merely tell it that there are multiple pictures and it then does everything automatically.

Question about multiple application modules.

Hello,
Suppose I have 2 database schema’s. For both schemas I have 1 application module. All view objects are in the same project.
For each application module I have an application definition.
Is it possible to link between these two applications? Because sometimes these database schema’s link to each other and you would like to jump from one application directly to the other.
For example you have orders locates in 1 DB schema and customers in another DB schema.
You would want to jump from the order directly to the customer details in the second schema.
Is this possible? Or do I need to make nested application modules etc?
I can find very little info about this; the JHS def guide does not offer much information about multiple application modules etc.
-Anton

Anton,
Yes, you can jump aroundd as you like.
You just can't use view links between VO's based on different db schema tables.
Nesting AM's doesn't help there, the DB connection of the top-level AM will be used.
Why don't you create synomyms for the tables in the other schema?
Steven Davelaar,
JHeadstart Team.

Question about conversational state of Stateless bean....

Hello all,
I have a simple stateless bean which parses an XML file and stores the xml content as an list of 2-D arrays in member variables. Here is quick look at design...
import javax.ejb.Stateless;
// included other libraries
import java.util.List;
import java.util.ArrayList;
@Stateless
public class XMLParseBean implements XMLParseBeanInterface {
    public List<String> strParameters;
    public List<String> getStrParameters() {
        return strParameters;
    private void setStrParameters(List<String> strParameters) {
        this.strParameters = strParameters;
    public void parseXML(String strFileName) {
           /* Open the XML file and do initializations for xml parsing here
            setStrParameters(visitNode(doc.getDocumentElement()));
    private List<String> visitNode(Element thisNode) {
            /* Parse the XML here */
            return strNodes; // return the node names and their values
}My question is : if I inject this bean in another bean, call the method for parsing XML and then call the getParameter method to access the value of member variable, will it work.
I mean since I am using stateless bean, does the conversation state end when the parseXML method ends?

sir_edward wrote:
Hi vikram8jp,
The session of an stateless bean ends after a method call. If you call a method of your bean, the bean will forget all attributes when the method ends. If you want to save attributes, you have to use a stateful bean.
Regards
Sir EdwardHello Sir Edward,
That answers my query.

Question about multiple audio tracks

Hello,
I see that imovie has only 2 audio tracks available when creating a movie. I need more than two since I will be working with a voiceover track, a soundtrack and at least one background/environment track all at one time. I won't be able to use the sound recorded with the video so that "track" is not an option.
My question is; Am I out of luck here and need to spend the 1K for studio pro to add more multiple audio tracks?
Also, I tried working with garageband but since all of my audio tracks import in at a minimum of 40 beats per minute, the voiceovers are all sped up and sound chipmunky.
Thanks for any help!

Well I didn't mean to irritate you...LOL And yes, I realize that this is the iM 6 forum but the gist of my question was related to multiple audio tracks in iM and thought I would ask about it in the forum pertaining to the latest release.
I had already posted a question in the GB forum regarding the bpm problem and found no answers so I was pretty much about to shelve that idea and forgo the whole garageband thing; this without knowing about the new "swap" features. I just updated to iM 6 yesterday.
As far as the "on-tape" raw audios: I was working on my movie in iM4. I wanted to add more audio bits but I don't have a proper mic for my G5 so I recorded the audio bits on dv8 tape through my camcorder. I imported the video (the image was the inside of my lens cap!), extracted the audio, took those audio files and imported them into GarageBand. That's when I noticed the bpm problem.
I'm sorry about the lack of info I originally gave but like I said, I had pretty much gave up on the idea of using GarageBand. I'm pretty new at this and I'm trying to decide what I need in terms of software to get what I want out of my movie. I'd be willing to pay for FCxp but still looking into whether I need to do just that or whether I can get by by using imovie and now it looks like GarageBand too.
ah, thanks for that
what irritates me, Prince wrote:
The audio tracks were voiceovers that came from my
dv8tape, imported into imovie4.
... ehm, but this is the iM 6(six) section, as said,
iM 6 allows now "swapping" files with GB3... (I'm way
back in the 90ies.... see my specs... )
so, video is in some iM, and he wants to use the
actual "on-tape" raw audios...
I thnik we need a little more detail...

OT: question about multiple root directories

ok, so on this website i just transferred to a new host, i
password
protected a directory, and for many people (possibly
everyone) it is
asking for the login info twice or three times before it lets
you in. i
contacted the host tech support, who gave me an explanation
that i don't
think makes sense. or maybe it does, but i don't think
applies to my
problem. and even if it does, they didn't offer any advice on
how to
solve the problem, just what might be causing it. bad tech
support.
anyway, i had a different idea about what the might be. there
are two
root directories on the server: public_html and www. they
both have the
same files, and therefore my protected directory is protected
in both
places. to me, that seems like it could be why it's asking
for login
info more than once.
so, i want to find out if this is the case by deleting the
one i'm not
uploading to. so basically, my question is, if i have chosen
public_html
as the directory that i upload to, is it safe to delete the
www
directory? or is there a reason that i need two root
directories and,
essentially, two copies of my site on the server?
i realize these are probably questions best suited for my
host, but i'm
unimpressed with their tech support so far (though i like
everything
else about them), and i'm confident that someone here will be
able to
answer this question for me.
thanks!

ok, well that's good to know! thanks.
also, i changed my mind about the tech support response.
here's what he
said:
Typically when you are seeing multiple login prompts like
what you
describe it has to do with content/site linking.
Here is a rather wordy explanation:
When entering a password-protected web site for the first
time, you
will occasionally notice that you are asked for your
password twice.
This may happen immediately after you entered the password
the first
time, or it may happen when you click on the first link
after
authenticating the first time.
This happens for a very simple, but nonetheless confusing,
reason,
again having to do with the way that the browser caches the
login
information.
Login information is stored on the browser based on the
authentication realm, specified by the AuthName directive,
and by
the server name. In this way, the browser can distinguish
between
the Private authentication realm on one site and on another.
So, if
you go to a site using one name for the server, and internal
links
on the server refer to that server by a different name, the
browser
has no way to know that they are in fact the same server.
For example, if you were to visit the URL
http://example.com/private/,
which required authentication, your
browser would remember the supplied username and password,
associated with the hostname example.com. If, by virtue of
an
internal redirect, or fully-qualified HTML links in pages,
you are
then sent to the URL
http://www.example.com/private/,
even though
this is really exactly the same URL, the browser does not
know this
for sure, and is forced to request the authentication
information
again, since example.com and www.example.com
<
http://www.example.com> are
not exactly the same hostname. Your
browser has no particular way to know that these are the
same web site.
at first i thought that didn't make any sense because i've
been using
the same url every time. but after paying closer attention
during the
login process, i see that he's right. i've been typing in the
url with
the www, but once you get logged in, there is no www. so i
tried typing
it in without the www, and i got right in with the first
attempt.
so, i suppose my question now is, can i make it so that
typing in the
url with the www, lets you in on the first login attempt? or
should i
just tell everyone to leave out the www?
thanks for the help!
Alan wrote:
>
>> there are two
>> root directories on the server: public_html and www
>>
>
> Usually, only one of them is a real folder. The other is
a symbolic link, a
> shortcut to the other.
>
> Don't delete either of them. You might delete the real
folder instead of the
> symbolic link. And- in most hosting setups, you wont
have permissions to
> delete the folder anyway. Changing the
ownership/permissions of those
> folders prevents panicked help ticket calls.
>
> You didn't say what the host says is the reason people
are asked for
> passwords several times. What did they say?
>
> and- is the first page that opens in the password
section a framed page?
> Or- does it draw images and other files from deeper
nested directories? Such
> an images folder?
>
>

Another question about multiple copies

I've seen several others posting questions lately about making multiple copies, but my question is just slightly different. I'll be making an iDVD project for our 5th Grade Recognition at school. Obviously, I'll be making it on my Mac at home. However, once it's finished and I have my final DVD, I'm going to need to make over 50 copies.
Last year, when I did the presentation as a Powerpoint show, it was easy enough to use multiple (Windows) computers at school to duplicate. There are 4 computers that I used to just rotate CD's in and out of to make copies.
Will I be able to use a Windows machine to make copies of an iDVD disk? I know that the computers can burn DVD's, so that's not an issue. I can't remember exactly which programs the computer have. I believe that one is Sonic something. The one that I used for CD's was IRecordNow (or something like that).
Is there any "protection" placed on the iDVD disk that will prevent me from placing the iDVD into the drive and choosing "copy" in whatever program that I use?

Is there any "protection" placed on the iDVD disk that will prevent me from placing the iDVD into the drive and choosing "copy" in whatever program that I use?
No. Only DVDs made in a production house have copy protection applied.
(31727)

Question about multiple Script declarations

I'm reading Flash Builder 4 and Flex 4 Bible.
On page 121 it states:
"Any particular <fx:Script> element can contain nested ActionScript or use the source property to link to an external Actionscript file, but it cannot do both at the same time. You can, however, have as many <Script> declarations in a single MXML file as you need>"
My questions are about the last sentence.
1) They specifically used <fx:Script> and <Script>. Are these two different entities?
2) I've never seen examples of using multiple <fx:Script> declarations in a project. How would this work?
3) Are they promoting bad practices by making this claim?
Thank you
Kristin

Although multiple script tags are allowed, I'd guess that they're not commonly used.
Gordon Smith
Adobe Flex SDK Team

Question about multiple ipods on one computer

I set up my own ipod nano on my computer and I have been using it without problems for some time. Now someone else in my family got the same ipod nano. I do not know how to set up this new ipod. Do i use the same software already on my computer? Do i just register this new ipod? Please help. Thank you

Hello!
Let me explain this in detail for you:
The Do Not Disconnect screen
It is normal for your iPod to say this message to you when you connect it to your computer.
When you need to disconnect it from your computer, you'll first need to eject it.
There are a few ways to eject your iPod; through iTunes, the Safely Remove Hardware program, and "My Computer".
Through iTunes
Ejecting your iPod via iTunes depends on what setting your iPod is on for.
Connect your iPod. Go into Edit> preferences> iPod. See what setting your iPod is on; "automatic" or "manual".
Automatic
If you aren't restoring, or updating your iPod, iTunes should automatically eject your iPod from iTunes. If it doesn't, then right-click the name of your iPod in iTunes, and make sure that the "enable for disk use" is un-checked.
Manual
If you need to eject your iPod from iTunes if the setting is "manual", click the little arrow that's next to the name of your iPod in the left source list in iTunes.
Through the "Safely Remove Hardware" program
Look at the bottom-right corner of your screen, and there's the system tray icons there. If the "Safely Remove Hardware" icon is there, click on it, select your iPod, and click "stop".
Through "My Computer"
Go to "My Computer".
Find your iPod's listing there (it's typically "E:" or "F:").
Right-click it, click on "eject".
For additional information about ejecting your iPod, check this Apple Support articles about it.
Safely disconnecting your iPod
About the "Do Not Disconnect" and "OK to Disconnect" screens on iPod
Any more questions? I'll be glad to try to help you again.
~~Kylene

Question about multiple LTS

Hi,
I am currently working with the rpd and a general doubt pops up... in the physical layer I have dimensions related, like for example Person, related to another dimension City and for example Age (with Foreign Key join):
City -< Person
Age -< Person
So in order to have a true star schema in the BMM, I need to create a single logical table with these three physical tables, right? The question is how.
I can add the physical tables as 3 logical table sources, or have one single logical table source, mapped to these three physical tables.
What is the difference, if any? Can someone explain, please? I always use the first choice (multiple logical table sources, each of them mapped to one physical table), but is it better to have just one single logical table source?
Thanks in advanced :)

I'm not surprised that it works fine, but there is a chance that it can lead to some problems. Let me explain.
You now have three LTS in your Logical dimension table Person.
Person
Age
City
When you create a report with columns from City and the Fact table, the BI Server will need to set up a join path between Fact and City table. There is no other option then via the physical Person table. So the BI Server decides for you to create a join between fact and person and person and city.
When the City is joined to other tables in the physical layer then the BI Server might create another join path between Fact and City, because it thinks it is more efficient. This can lead to inccorect results.
When you add the three physical tables to one LTS, you explicitly tell the BI Server, to create a join path from Fact to City table via the Person table.

Question about planning using serialization point in transaction S2L

Hello colleagues!
Iu2019ve try to implement the supply of production line (supply area) just in sequence. R/3 received dependent requirements and backflushes of serialization point behind target Supply Area from APO.
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Please, help me to find solution.
Thanks.
Ivan.

Thanks for the feedback. I followed the link but I guess I just don't understand about the extended file system. Is HFS+ the same as Mac OS extended (Journaled).
Basically, yes.
I understand that I guess that case sensitive means just that, but what is the difference between journaled and extended? Does it mena that a log file is only saved for the journaled system?
When a filesystem is journaled, all changes to it are written to a log.
Do most people just format as Extended without journaled? I am about to reformat my iMac and install Leopard on there and I was wondering if I should format using the extended or the extended with journal?
Using the journaling option slightly decreases the amount of space on the drive usable by you and increases the chance of recovering data from the drive if a problem occurred. If you want, you can use the Disk Utility to turn it on and off without erasing the drive again.
(25598)

Question about main difference between Java bean and Java class in JSP

Hi All,
I am new to Java Bean and wonder what is the main difference to use a Bean or an Object in the jsp. I have search on the forum and find some post also asking the question but still answer my doubt. Indeed, what is the real advantage of using bean in jsp.
Let me give an example to illustrate my question:
<code>
<%@ page errorPage="errorpage.jsp" %>
<%@ page import="ShoppingCart" %>

<jsp:useBean id="cart" scope="session" class="ShoppingCart" />
<html>
<head><title>Shopping Cart</title></head>
<body bgcolor="#FFFFFF">
Your cart's ID is: <%=cart.getId()%>.
</body>
<html>
</code>
In the above code, I can also create a object of ShoppingCart by new operator then get the id at the following way.
<code>
<%
ShoppingCart cart = new ShoppingCart();
out.println(cart.getId());
%>
</code>
Now my question is what is the difference between the two method? As in my mind, a normal class can also have it setter and getter methods for its properties. But someone may say that, there is a scope="session", which can be declared in an normal object. It may be a point but it can be easily solved but putting the object in session by "session.setAttribute("cart", cart)".
I have been searching on this issue on the internet for a long time and most of them just say someting like "persistance of state", "bean follow some conventions of naming", "bean must implement ser" and so on. All of above can be solved by other means, for example, a normal class can also follow the convention. I am really get confused with it, and really want to know what is the main point(s) of using the java bean.
Any help will be highly apprecaited. Thanks!!!
Best Regards,
Alex

Hi All,
I am new to Java Bean and wonder what is the main
difference to use a Bean or an Object in the jsp. The first thing to realize is that JavaBeans are just Plain Old Java Objects (POJOs) that follow a specific set of semantics (get/set methods, etc...). So what is the difference between a Bean and an Object? Nothing.
<jsp:useBean id="cart" scope="session" class="ShoppingCart" />
In the above code, I can also create a object of
ShoppingCart by new operator then get the id at the
following way.
ShoppingCart cart = new ShoppingCart();
out.println(cart.getId());
...Sure you could. And if the Cart was in a package (it has to be) you also need to put an import statement in. Oh, and to make sure the object is accessable in the same scope, you have to put it into the PageContext scope. And to totally equal, you first check to see if that object already exists in scope. So to get the equivalant of this:
<jsp:useBean id="cart" class="my.pack.ShoppingCart"/>Then your scriptlet looks like this:
<%@ page import="my.pack.ShoppingCart %>
<%
ShoppingCart cart = pageContext.getAttribute("cart");
if (cart == null) {
    cart = new ShoppingCart();
    pageContext.setAttribute("cart", cart);
%>So it is a lot more work.
As in my mind, a normal class can also
have it setter and getter methods for its properties.True ... See below.
But someone may say that, there is a scope="session",
which can be declared in an normal object.As long as the object is serializeable, yes.
It may be
a point but it can be easily solved but putting the
object in session by "session.setAttribute("cart",
cart)".Possible, but if the object isn't serializable it can be unsafe. As the point I mentioned above, the useBean tag allows you to check if the bean exists already, and use that, or make a new one if it does not yet exist in one line. A lot easier than the code you need to use otherwise.
I have been searching on this issue on the internet
for a long time and most of them just say someting
like "persistance of state", "bean follow some
conventions of naming", "bean must implement ser" and
so on. Right, that would go along the lines of the definition of what a JavaBean is.
All of above can be solved by other means, for
example, a normal class can also follow the
convention. And if it does - then it is a JavaBean! A JavaBean is any Object whose class definition would include all of the following:
1) A public, no-argument constructor
2) Implements Serializeable
3) Properties are revealed through public mutator methods (void return type, start with 'set' have a single Object parameter list) and public accessor methods (Object return type, void parameter list, begin with 'get').
4) Contain any necessary event handling methods. Depending on the purpose of the bean, you may include event handlers for when the properties change.
I am really get confused with it, and
really want to know what is the main point(s) of
using the java bean.JavaBeans are normal objects that follow these conventions. Because they do, then you can access them through simplified means. For example, One way of having an object in session that contains data I want to print our might be:
<%@ page import="my.pack.ShoppingCart %>
<%
ShoppingCart cart = session.getAttribute("cart");
if (cart == null) {
    cart = new ShoppingCart();
    session.setAttribute("cart", cart);
%>Then later where I want to print a total:
<% out.print(cart.getTotal() %>Or, if the cart is a JavaBean I could do this:
<jsp:useBean id="cart" class="my.pack.ShoppingCart" scope="session"/>
Then later on:
<jsp:getProperty name="cart" property="total"/>
Or perhaps I want to set some properties on the object that I get off of the URL's parameter group. I could do this:
<%
ShoppingCart cart = session.getAttribute("cart");
if (cart == null) {
    cart = new ShoppingCart();
    cart.setCreditCard(request.getParameter("creditCard"));
    cart.setFirstName(request.getParameter("firstName"));
    cart.setLastName(request.getParameter("lastName"));
    cart.setBillingAddress1(request.getParameter("billingAddress1"));
    cart.setBillingAddress2(request.getParameter("billingAddress2"));
    cart.setZipCode(request.getParameter("zipCode"));
    cart.setRegion(request.getParameter("region"));
    cart.setCountry(request.getParameter("country"));
    pageContext.setAttribute("cart", cart);
    session.setAttribute("cart", cart);
}Or you could use:
<jsp:useBean id="cart" class="my.pack.ShoppingCart" scope="session">
<jsp:setProperty name="cart" property="*"/>
</jsp:useBean>The second seems easier to me.
It also allows you to use your objects in more varied cases - for example, JSTL (the standard tag libraries) and EL (expression language) only work with JavaBeans (objects that follow the JavaBeans conventions) because they expect objects to have the no-arg constuctor, and properties accessed/changed via getXXX and setXXX methods.
>
Any help will be highly apprecaited. Thanks!!!
Best Regards,
Alex

Question about multiple listeners and vip addresses in rac.

We have a 2 node rac cluster running 10.2.0.3 on rhel4 on the itanium platform. We have a need where we want to connect the 2 hosts up to another network temporarily by configuring an additional network interface on each server so that we can test some connections from a different network.
My question is can you configure multiple listeners on the same server in which the newly added listener can be configured to service requets on the new network interface?
Because it's rac would you need to configure an additional vip address? I am not sure that you can have multiple vip's on a server?
Has anyone configured rac in such a way, any help is appreciated.

can you configure multiple listeners on the same server in which the newly added listener can be configured to service requets on the new network interface?Yes, you can but you should not be doing this. Listener is a node specific resource and one listener can server multiple services. You actually can create multiple services within the database for different set of users and all can be registered to the same listener.
Because it's rac would you need to configure an additional vip address? What do you mean by additional IP?
You have installed 10g RAC where you have already configured virtual IPs. Why do you want to have additional one? node1 - static ip1, vip1, pvtip1
node2 - static ip2 vip2, pvtip2
total 6
I am not sure that you can have multiple vip's on a server?Nothing to do with the server, they are based on public IP. Yes you can create multiples vip's based on same public IP. This is possible, But you do not need to do this in RAC environment.

Question about multiple recovery partitions

Hello,
My question is: what is the default partition for toshiba z930 ultrabooks.
According to Windows 8 disk management, there are 6 partitions on my drive. From what I understand, the 6Gb is for hibernation (my computer's RAM is 6Gb), and the 101.38Gb is the main partition, and the 10.60Gb is for Toshiba recovery. I heard that the 450Mb partition is meant for Windows repair tools. But why are there two of such partitions?
Recently I did a reset using the built-in windows 8 function. Not sure if this caused the "duplicate" 450Mb partition.
What is the default partitioning scheme for toshiba z930 ultrabooks? My purpose of asking is partly out of curiosity but mainly because I am afraid of creating more of these 450Mb partitions if I should do a reset in future. Logically, a reset should not cause the duplicate partition but why are there two seemingly identical partitions? (I did not check the partition scheme when I first bought the computer, so I am not sure if I caused the duplicate. )
Thanks very much in advance for taking the time to help me. I've attached a screenshot of the partitions.
http://oi57.tinypic.com/2rw6zia.jpg

I don't have a Toshiba machine here, but I know something about Windows 8 and about UEFI/GPT partitioning. I can tell you what four of the six partitions are for.
Starting from the left side, the first partition contains the recovery environment (starts with the Choose-an-option menu); the second (System) partition contains the boot files; the C partition has Windows of course; and the 10.6 GB one is the recovery partition, which contains the image of the whole drive (including itself).
I don't know what Toshiba uses the other two partitions (450 MB and 6 GB) for. Perhaps somebody here will explain those to us.
Peculiar that Toshiba does not have the 128 MB Microsoft Reserved Partition. I thought everybody must have that one.
Configure UEFI/GPT-Based Hard Drive Partitions
PS A Reset preserves the partitioning and the hibernation image is the file C:\hiberfil.sys.
-Jerry

Question about multiple RequiresNew in Entity Bean transaction

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