Number of instances of an ancestor applet in memory

Hi all,
I have an ancestor applet that extends JApplet, and several descendents that extend the ancestor. Each time I call a descendent applet, does another copy of the ancestor get loaded into memory? Or is there just one copy of the ancestor?
Thanks!

the objects will be distinct in memory except for static methods and values.
if we have this class
public class City extends State{
}and we instantiate two objects
City minneapolis = new City("Minneapolis");
City portland = new City("Portland");then when we try to set the states for these cities the descendent would have to be different for each object otherwise the cities would wind up in the same state.
minneapolis.setState("Minnesota");
portalnd.setState("Oregon");

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Problem:Multiple instances of the same applet on a webpage...

I have an applet which connects to a server to read an XML-file.
I use Doucument to parse the XML-file like this:
String xmlurl="http://www.somesite.com/somexmlpage.php";
Document d =DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(xmlurl);
(...read the XML-file...)
This works fine.
However, I need multiple instances of the same applet running at the same time on the same webpage.
Now, with multiple applets running at the same time the parsing no loger works. If one applet is doing some parsing and a taskswitch takes place to let another applet run, the applet which is interrupted is not able to continue the parsing as it looses its "incoming data" when another applet reads from the server.
How can different applets affect each other like this?
And how can I fix the problem?
Thanks in advance for any help!!

However, I need multiple instances of the same applet running at the same time on the same webpage.
Why? But okay.Because the the different applets show information about different items.
Now, with multiple applets running at the same time the parsing no loger works. If one applet is doing some parsing and a
taskswitch takes place to let another applet run, the applet which is interrupted is not able to continue the
parsing as it looses its "incoming data" when another applet reads from the server.
How did you determine that's what's happening?By printing out debuginformation.
Each applet prints out a message (System.out.println) when it creates an instance of Document (ie. connects to the server) and the applet also prints out XML-information as the XML-file is processed.
But, actually, I was a bit quick in my first post; The applet doesen't neccesarily loose its "incoming data", but the parser looses the data it is parsing. I can download the data from the server first, and then start parsing it. If a taskswitch happens while one applet is parsing, it looses its data, even if the data is allready downloaded.
I see this since I see another applet making a printout, and when first applet starts again, the parser has lost track of its data.
It works fine if only one applet is running. And everything is fine until the next applets starts; I can see this from the printout.
Again, the appet prints out data as it parses the document. I see the next applet starting to work, and when the first one continues parsing again the printout shows that data is no longer there. It happens everytime the runtime switches to another applet, and it never happens if just one applet is running.
Googeling a little tells me that DocumentBuilder.parse() isn't thread-safe, but this shouldn't have anything to do with it, should it?
Each applet is a separate process, and not different threads in the same process, aren't they? (Not sure how the runtime treats multiple applets...)And secondly, the applets create their own instance of Document anyways.

ABAP-OO: Create any number of instances

Hello,
please, look at this simple scenario:
DATA:
my_class type ref to zcl_xyz.
create object my_class.
In that case I have just created one instance. Now I need a mechanism to create and identify any number of instance of the type zcl_xyz. <b>That means, I dont know exactly, if I need 5 or 200 instances.</b> Any feasible idea, how to handle that?
Thanks and regards.

Hi,
Declare one static attribute in the class.
Here is the sample code to trap the number of instance created for an object type.
CLASS C1 DEFINITION.
PUBLIC SECTION.
    CLASS-DATA CREATE_COUNT TYPE I.
    METHODS CONSTRUCTOR.
ENDCLASS.
DATA: O1 TYPE REF TO C1,
      O2 LIKE O1,
      O3 LIKE O1.
CREATE OBJECT: O1,
               O2,
               O3.
WRITE: 'Number of created objects:', C1=>CREATE_COUNT.
CLASS C1 IMPLEMENTATION.
METHOD CONSTRUCTOR.
    CREATE_COUNT = CREATE_COUNT + 1.
ENDMETHOD.
ENDCLASS.
Hope this hint helps you.

How count the total number of instances ?

I have 2 scenarios :-
1. How to get the total number of instances of the node in a BO?
eg :
businessobject BO1   {
element BO_ID;
                   node NODE1 [0..n]
                     element Node_ID;
                     element Status ;
                     element value:
I want to get total number of the NODES instances in the particular instance of the BO1.   !!!?????
2. I want to make some calculations based on the attributes of the NODE1 , in the   BeforeSave .absl of the Business Object BO1.
eg:
something like this :-
In BeforeSave of BO1.absl -
for ( all the instances in NODE1 )
{   if (NODE1.status == true)
             sum = sum + NODE1.value
Please help !!!!

Your approach is correct.
You can use a standard Query or create your own Query to run through Datainstances.
Documentation with examples for Queries in ABSL see here: https://my020062.sapbydesign.com/sap/ap/ui/repository/SAP_BYD_WEKTRA/CP/sapLSUIContentPlayerTestPage.html?manifest=067D03A7602B1D490899DF46B5082089&COMPONENT=A1S_PDI&RELEASE=260&LANGUAGE=en&REGION=&INDUSTRY=&TASK=CR_VIEW&sap-language=EN
Looking / Clincking for "SAP Business ByDesign Scripting Language" and "Syntax for Implementation of Actions and Events" and "Query"

The difference of minor number and instance number

I study how to develop device drivers. I am beginner.
I'm confusing the differece of minor number and instance number
what is the exact difference of them???

Hi,
I guess a good example would be a disk. Each disk you have would be a different instance. To use a disk it is divided into slices, each of which has a different minor number.
Your device driver needs to map the minor number to the correct instance of the device. How you do this is completely up to you, so to start you could map them one to one.
Hope that helps.
Ralph
SUN DTS

Updating the BPM workspace view based on the number of instances in view

Hi All,
We are using ALBPM 6.0.5 enterprise with Weblogic 10 server. We have a requirement to update dynamically the view name in the left side panel in BPM workspace. Based on the number of instances created, the view(view name ABC) should carry something like "ABC(2)". 2 being the number of instances in the view. It's more like a mailbox client InBox. Depending on the number of mails, the Inbox changes the number highlighting new mails.
I've tried using the Workspace API to update the cusom decorator class getRow() method to update the view CSS property. But it doesn't seem to work. All I'm able to do with the decorator class is to update the propeties of instances, but not other panels?
Is there any API to control the panel properties in BPM workspace?
By the way, I'm using the standard workspace without any changes.
Any pointer will be much appreciated.
Cheers.

Yes, I'm hoping to fill in DataGridA with all records from dc where dc["ENTITY_ID"] = dr["ENTITY_ID"]
I tried your statement and received the following errors:
Error 1
The left-hand side of an assignment must be a variable, property or indexer
C:\ISMG_7210\MedicalSequenceDataAnalysisProject\OTCS_Algorithm\OTCS_Algorithm\Form1.cs
87 71
OTCS_Algorithm
Error 2
Cannot implicitly convert type 'object' to 'int'. An explicit conversion exists (are you missing a cast?)
C:\ISMG_7210\MedicalSequenceDataAnalysisProject\OTCS_Algorithm\OTCS_Algorithm\Form1.cs
87 99
OTCS_Algorithm
Thank you for your help.
Joel Fredrickson
Yes, please follow example provided by Kristin, the error is because of missing comparison operator ==, and that the dr["ENTITY_ID"] is of type object that needs to be converted to int. I've updated my code, if you have Entity_ID in your DB as
double use Convert.ToDouble instead.
Fouad Roumieh

Why doesn't a search show the number of instances found?

I'm shocked that Internet Explorer does this but Firefox doesn't -- when I do a search on a page (ctrl-F), why doesn't it show the number of instances found on that page? See IE8 for an example. This should be built-in and not require an add-on, but I'll take it any way I can.

*Find In Numbers: https://addons.mozilla.org/firefox/addon/6738

How to control the number of instances of an object ?

Hi all,
Can anybody answer, How to control the number of instances of an object being created?
suppose at any point of time, if i would like to have 5 instances at the maximum, how can i disable the further requests?
Thanks in advance
Pradi

write a factory method that controls the number of instances for you:
import java.util.List;
import java.util.Arrays;
public class Bar
   private static final int MAX_BARS = 5;
   private static int numBars = 0;
   private int id;
   public static void main(String [] args)
      try
         int numBars = ((args.length > 0) ? Integer.parseInt(args[0]) : MAX_BARS+1);
         Bar [] bars = new Bar[numBars];
         for (int i = 0; i < bars.length; ++i)
            bars[i] = Bar.create();
         System.out.println(Arrays.asList(bars));
      catch (Exception e)
         e.printStackTrace();
   private Bar() { this.id = numBars++; }
   public String toString() { return "I am bar number " + this.id; }
   public static Bar create()
      Bar nextBar = null;
      if (numBars < MAX_BARS)
         nextBar = new Bar();
      return nextBar;
}%

The maximum number of instances has been exceeded

Hi,
I my PROD environment i am getting this type of exception.
Instance Cache: Opening the cache for process '/ProcessName#Default-1.0'. The maximum number of instances has been exceeded.
any suggestion ?
Thanks,
Brijesh Kumar Singh

Hi Brijesh,
Please post the Complete StackTrace. When are you getting this exception...means which operation are u performing?
Are u in a Clustered Environment?
Which version of WLS are u using?
by anychance Are you getting the following Oracle Error Code in your Server Logs anywhere: ORA-00020 ?
Thanks
Jay SenSharma
http://jaysensharma.wordpress.com (WebLogic Wonders Are Here)

Number of instances

does any one know a simple way to return the number of
instances or the number of synchronized objects in a
fms application??
thank you in advance.

does any one know a simple way to return the number of
instances or the number of synchronized objects in a
fms application??
thank you in advance.

Number of Instances of any Object in JVM

Hello Guys, Is there any way to know number of instances for any perticular class in JVM. For example i want to know how many instance of calss "Vector" are there in JVM. Can we write any program which take class name as parameter and tells the number of instances ? is there any thing readly available in some place or if some of you guys might already written.
Please let me know, thanks.

In the destoryMine set the object to null and
decrease the minecount by one.I follow everything you say but this. How do you "set
the object to null"? Could you provide some Java
source code as an example?I guess I don't see the problem you do. Assuming Mine has a single constructor taking a String parameter, what is wrong with this:
public class MineFactory {
    private static int counter = 0;
    public static Mine createMine(String value) {
        counter++;
        return new Mine(value);
    public static void destroyMine(Mine mine) {
        mine = null;
        counter--;
    public int getMineCount() {
        return counter;
}? The line         mine = null; is not a problem, is it?
-- Scott

Maximum number of instances that can be created on an oracle server ?

Hello all....
Can you tell me what is the maximum number of instances that can be created on an oracle server ?
thanks and regards
vinay raj

vinay raj wrote:
Hello all....
Can you tell me what is the maximum number of instances that can be created on an oracle server ?
thanks and regards
vinay raj
The answer would be that as many as the server's ram would hold up . There is no limitation otherwise as such. How many maximum you have created so far?
Aman....

Number of Instances 2 or 4?

Hi, I just got the 2.66GHz Quad-Core Intel Xeon "Nehalem" processor MacPro. Do I select the Number of Instances to 2 or 4? Thanks

I've noticed that all of my processors are active during processing, no matter what the number of Qmaster instances are. The instances are not the cores that are in use, but rather how many parallel process are running.
Example:
If you have a 4 core Mac and set it to 2 instances, then you will see in the batch monitor window that two process are running, but that all cores are processing the information. You can see this if you have a system utility like menu meters running, which shows how your cores are being used.
The advantage here is that the more processes that are running in parallel, more of the head room for each processor is consumed, (till it reaches 100% for each processor.) Qmaster will also split up a single file into many mini files, so that different parts of the same file can be worked on in parallel, so that the single file will finish sooner, than when it is encoded from start to finish as a single encode, (like when you select "This computer" under the submit button of compressor, rather than using a cluster.
I have two 4 core Mac's one is a G5/quad and the other is an Intel 3.0Ghz 4 core. I run both in Qmaster with 3 instances, which puts it just under 100% of all cores headroom being consumed and works just fine, finishing project very quickly.

MDB and number of instances

Hello,
How could I setup the number of instances limitation for a MDB ? I use for deploy Sun Application Server 8.0
Thank you for feedbacks

Hi Gazi,
You can control this using the max-pool-size element of bean-pool in sun-ejb-jar.xml. See the sun-ejb-jar dtds in lib/dtds for more info. This sets the value on a per-bean basis. You can also set the default for all message-driven beans in domain.xml.
--ken
Kenneth Saks
J2EE SDK Team
SUN Microsystems

How to count the number of instances a record appears in a string

I have a move that imports Name, Department and Site from an
external CSV file, this part I managed to get working after many
weeks. I would like to be able to count the number of instances of
a specific Site “Glasgow” appears in the String. This
way I know how many lines to set.
Also can you add Dynamic text to a rollover button? I can get
the the text to display on the root but not on a button.
I am new to programming and Flash so apologies in
advance.

Those which took time to read carefully *_iWork Formulas and Functions User Guide_* are aware of the availability of wildcard characters.
=COUNTIFI(range;"=text")
will do the trick.
Yvan KOENIG (VALLAURIS, France) lundi 26 avril 2010 17:36:34

Number of instances of an ancestor applet in memory

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