Class Data

Hello Expert,
We have two different class assigned to two differnt document type,
But when we create DIR with one docment type and dont enter required characteristics,
- It allows to save with information message " Status changed: missing values for required chars "
Where for other document type with different class,
-Not allowing us to save with information message "The assigned values are incomplete"
What setting will allow us to raise information message "The assigned values are incomplete" and not allowing to save.
Thanks,
Sam

Hi Samir,
In DC10 whatever class is assigned to a specific document type , will work for that document type in additional data. Also the characteristics assigned to the class, will work for that class only. So in classification whatever mandatory fields are there, you need to fill it as classification works separately irrespective of other data except document status. whenver you will change any additional data you need to change the status of DIR.
Since it;s independant it will not allow to save the record if mandatory fields are not filled.
Hope this will help.
Regards,
Ravindra

Similar Messages

ITunes 10.5.3, Unable to Load Class Data from Sync Services, Crashes Repeatedly

Ever since iTunes 10.5.3 on my Windows 7 x64 box, I've been having serious problems keeping iTunes running:
1) Any time I connect my iPhone or iPad, or any time they attempt to sync over WiFi, I get the 'Unable to load class data from sync services' error. It's worth mention that the iPhone or iPad do actually then proceed to sync correctly, and all media / data is synchronized successfully, as far as I've been able to tell. I've reset sync history, restored the iPhone and iPad, manually moved the SyncServices directory, set both the iPhone and iPad up as new, completely uninstalled iTunes and the mobile device software, re-installed, and *nothing* I do fixes this issue or even seems to impact it. Uninstalling iTunes 10.5.3 and reinstalling iTunes 10.5.2 resolves this error.
2) iTunes 10.5.3 has serious crashing problems on my machine, though I've searched through forums and found a lot of other people with the problem. In my case, sporadically as iTunes access the iTunes store (for example, I can always make it happen by subscribing to the Diggnation podcast and telling it to refresh the podcast), I get a full application crash which generates the following event in the event log:
Faulting application name: iTunes.exe, version: 10.5.3.3, time stamp: 0x4f14cc3d
Faulting module name: KERNELBASE.dll, version: 6.1.7601.17651, time stamp: 0x4e211319
Exception code: 0x80000003
Fault offset: 0x0001280c
Faulting process id: 0x564
Faulting application start time: 0x01cce78789dc009a
Faulting application path: D:\Program Files (x86)\iTunes\iTunes.exe
Faulting module path: C:\Windows\syswow64\KERNELBASE.dll
Report Id: ecc77400-537a-11e1-b809-00248c196007
Again, uninstalling iTunes 10.5.3 and re-installing iTunes 10.5.2 fixes this issue as well, but I really shouldn't have to do that. Is there any actual solution to these problems other than dowgrading to an older version?
Yes, I'm running current malware protection (and my system is clean) and yes, I've already checked any other obvious culprits to make sure I don't just have a corrupt library or file somewhere that's causing it. My Windows 7 install is completely up to date from a Windows Update perspective and also from a driver perspective (even including the motherboard and chipset drivers). I made sure to do a system file integrity check (sfc /scannow) and it confirmed my install of Windows isn't suspect, but beyond all that I was able to reproduce these failures on a completely separate machine running Windows 7 x64, without any of my media library or data on it -- iTunes 10.5.3 just seems to be bad news on Windows 7 x64 for me, even though I know there are definitely people are using it successfully. I don't get any other application crashes for any other applications, and I've never had an issue like this with any previous version of iTunes...
Last but not least, in case it matters, I'm running iOS 5.0.1 on both the iPhone4 and the iPad2. The iPhone4 is the GSM AT&T model and the iPad2 is the CDMA Verizon model.

OK, I've given up. Uninstalled iTunes 10.5.3 permanently. It's a shame, 10.5.2 works perfectly but 10.5.3 is a complete and total cluster for me.
Anyone with the same problems who hasn't done this already, just uninstall iTunes and the Apple Mobile Device Service in your Add/Remove Programs, then re-install iTunes 10.5.2. You won't lose your library or any settings or apps, it will just go back to working again.
I wish Apple would acknowledge this so that I'd at least know it would be fixed in the future.

"iTunes was unable to load class data information from sync services"

I own iTunes 10.5 beta 3 64-bit for my 64-bit windows 7 pc, and it gives me this message whenever I try to sync ANY of my devices: "iTunes was unable to load class data information from Sync Services". I own an old iPod video and an iPhone 4 with iOS 5 beta 3. I've tried uninstalling all Apple products, searching through my hard drive and deleting everything Apple, cleaning the registry, EVERYTHING. I've reinstalled at least 4 times now. The problem refuses to become fixed. I've searched every article online possible, and none of the solutions have worked. Is there anything I can do to get my stuff back on to my devices???

In the course of your troubleshooting to date, have you worked through the following document?
iTunes for Windows: "Unable to load data class" or "Unable to load provider data" sync services alert

Class data upload through LSMW using BAPI

Hi All,
Plz tell me how to upload class data through LSMW using BAPI.I also need some study material on BAPI.
Bye,
Mithilesh Tiwari

its not possible with single file
for this you need to pass two files of data
1 ) Header data ZSOURCE_LIST_HEADER       Source List Header
     MATNR                          C(018)    Material Number
                                    Selection Parameter for "Import/
     WERKS                          C(004)    Plant
2) item data     ZSOURCE_LIST_ITEM         Source List Item
         MATNR                          C(018)    Material Number
         LIFNR                          C(010)    Vendor Number
         EKORG                          C(004)    Purchasing Organiz
         WERKS                          C(004)    Plant
         VDATU                          C(008)    Valid From
         BDATU                          C(008)    Valid to
for this use below LSMW IDOC method
Message Type         SRCLST                      Source List
Basic Type           SRCLST01                    Source List

Class-data versus data and methods versus class-methods in OO ABAP

Hi
I was going thorugh following OO ABAP code.
CLASS vessel DEFINITION.
PUBLIC SECTION.
    METHODS: constructor,
             drive IMPORTING speed_up TYPE i,
             get_id RETURNING value(id) TYPE i.
    CLASS-METHODS: start,
                   objects,
                   inheritance,
                   interfaces,
                   events.
PROTECTED SECTION.
    DATA: speed TYPE i,
          max_speed TYPE i VALUE 100.
PRIVATE SECTION.
    CLASS-DATA object_count TYPE i.
    DATA id TYPE i.
ENDCLASS.
Whats is difference between methods and class-methods ?
What is the difference between data and class-data ?

Hi Rajesh,
There are two types of componenets in a class
1)Static components
2) Instance components
Instance components exist for every instance of the class, while static exist only once for any number of instances of the class.
Components of the class are methods, attributes, events etc.
static attributes are represented by CLASS-DATA and instance attributes are represented by DATA.
static methods hence are done by CLASS-METHODS and can access only static attributes.
Instance methods are done by METHODS and can access any attribute.
For eg: supposing that in a class, there is a static attribute. Suppose after one instance is created, we are setting this static attribute value as 10. Now we are creating another instance of the same class. Now when you try to display the value of this attribute, it will be 10.ie. it needs to be initialized once and can be shared between instances.
Just go through this document..You will get nice info from this.
http://esnips.com/doc/5c65b0dd-eddf-4512-8e32-ecd26735f0f2/prefinalppt.ppt
http://esnips.com/doc/2c76dc57-e74a-4539-a20e-29383317e804/OO-abap.pdf
If you want to go deeper, like object persistence and all, just refer this document.
http://esnips.com/doc/92be4457-1b6e-4061-92e5-8e4b3a6e3239/Object-Oriented-ABAP.ppt
Regards,
SP.

Cannot reslove symbol class Date

I am trying to get a clock to show the time in my program. However, when I try to compile the program a "cannot resolve symbol class Date" error appears. I can't figure out where the problem in my program is. Here is my source code. I would appreciate any help.
import javax.swing.*;
import java.io.*;
import java.lang.*;
import java.awt.*;
import java.applet.*;
import java.awt.event.*;
//import java.util.*;
import java.math.*;
public class store
public static void main(String[] args)
String dataInput;
     dataInput = JOptionPane.showInputDialog(null, "Input item data: ");
JOptionPane.showMessageDialog(null, "" + dataInput);
EasyReader console = new EasyReader();
int i, j, k, inum, icom, min, nswaps; inum = 0; boolean swap = false;
double num[] = new double[100]; double dsum, T;
     do
     System.out.println(); System.out.println("Command Menu"); System.out.println();
     System.out.println("1 = Display the data");
System.out.println("2 = Bubble Sort the numbers");
System.out.println("3 = Selection Sort the numbers");
System.out.println("4 = Insertion Sort the numbers");
System.out.println("5 = Binary Search for a number");
System.out.println("0 = Exit the program"); System.out.println();
System.out.print("Enter Command - ");
icom = console.readInt(); System.out.println();
switch (icom)
case 1: // Display the data
               Display(inum, num);
               break;
case 2: // Bubble sort
               nswaps = 0;
               for (i = 0; i < (inum-1); i++ )
          for (j = (i+1); j < inum; j++)
                    if (num[i] > num[j])
                              T = num;
                         num[i] = num[j];
                         num[j] = T;
                         nswaps++;
               System.out.println("The number of swaps was - " + nswaps);
               Display(inum, num);
               break;
case 3: // Selection sort
               nswaps = 0;
               for (i = 0; i < inum - 1; i++) {
          min = i; swap = false;
for (j = i + 1; j < inum; j++)
     if (num[j] < num[min]) { min = j; swap = true; }
if (swap) {T = num[min];
          num[min] = num[i];
                    num[i] = T;
                    nswaps++;}
               System.out.println("The number of swaps was - " + nswaps);
               Display(inum, num);
               break;
case 4: // Selection sort
               nswaps = 0;
               for (i = 1; i < inum; i++)
               j = i; T = num[i];
                    while ((j > 0) && (T < num[j-1]))
          num[j] = num[j-1]; j--; nswaps++;
               num[j] = T; nswaps++;
               System.out.println("The number of swaps was - " + nswaps);
               Display(inum, num);
               break;
case 5: // Binary Search
               System.out.println("Your numbers will be sorted first");
               System.out.println();
               for (i = 1; i < inum; i++)
               j = i; T = num[i];
                    while ((j > 0) && (T < num[j-1]))
          num[j] = num[j-1]; j--;
               num[j] = T;
               System.out.print("Enter the number to locate - ");
               T = console.readDouble(); nswaps = 0; System.out.println();
               int left = 0, right = inum, middle; k = -1;
               while (left <= right)
                    middle = (left + right) / 2;
                    if (T > num[middle]) {left = middle + 1; nswaps++;}
                    else if (T < num[middle]) {right = middle - 1; nswaps++;}
                    else { k = middle; break; }
               if (k == -1) System.out.println("Your number was not located in the array");
               else System.out.println("Your number " + T + " is in position " + (k+1));
               System.out.println();
               System.out.println(nswaps + " comparisons were needed to search for your number");
               Display(inum, num);
               break;
     } while (icom != 0);
     public static void Display(int inum, double num[])
          {     int k;
               System.out.println();
               System.out.println("");
               System.out.println();
          for (k = 0; k < inum; k++)
          System.out.println((k+1) + " - " + num[k]);
     return;
class Clock extends Thread
     //A Canvas that will display the current time on the calculator
     Canvas Time;
     //A Date object that will access the current time
     private Date now;
     //A string to hold the current time
     private String currentTime;
     //The constructor for Clock, accepting a Label as an argument
     public Clock(Canvas _Time)
          Time = Time;          //Time is passed by reference, so Time
                                   //now refers to the same Canvas
          start();               //start this thread
     //The overriden run method of this thread
     public void run()
          //while this thread exists
          while (true)
               try
                    draw_clock();          //calls the draw_clock method
                    sleep(1000);          //puts this thread to sleep for one
                                             //second
               //catches an InterruptedException that the sleep() method might throw
               catch (InterruptedException e) { suspend(); }
               //catches a NullPointerException and suspends the thread if one occurs
               catch (NullPointerException e) { suspend(); }
     //A method to draw the current time onto the Time Canvas on the applet
     public void draw_clock()
          try
               //Obtains the Graphics object from the Canvas Time so that it can
               //be manipulated directly
               Graphics g = Time.getGraphics();
               g.setColor(Color.gray);          //sets the color of the Graphics object
                                                  //to gray for the rectangle background
               g.fillRect(0,0,165,25);          //fills the Canvas area with a rectangle
                                                  //starting at 0,0 coordinates of the Canvas
                                                  //and extending to the length and width
               g.setColor(Color.orange);     //sets the color of the Graphics object
                                                  //to orange for the text color
               get_the_time();                    //calls the get_the_time() method
               //calls the drawString method of the Graphics object g, which will
               //draw a string to the screen
               //Accepts a string and two integers to represent the coordinates
               g.drawString("Current Time - " + currentTime, 0, 17);
          //catches a NullPointerException and suspends the thread if one occurs
          catch (NullPointerException e) { suspend(); }
     //A method to obtain the current time, accurate to the second
     public void get_the_time()
          //creates a new Date object for "now" every time this is called
          now = new Date( );
          //integers to hold the hours, minutes and seconds of the current time
          int a = now.getHours();
          int b = now.getMinutes();
          int c = now.getSeconds();
          if (a == 0) a = 12;          //if hours are zero, set them to twelve
          if (a > 12) a = a -12;     //if hours are greater than twelve, make a
                                        //conversion to civilian time, as opposed to
                                        //24-hour time
          if ( a < 10)               //if hours are less than 10
               //sets the currentTime string to 0, appends a's value and a
               //colon
               currentTime = "0" + a + ":" ;
          else
               //otherwise set currentTime string to "a", append a colon
               currentTime = a +":";
          if (b < 10)                    //if minutes are less than ten
               //append a zero to string currentTime, then append "b" and a colon
               currentTime = currentTime + "0" + b + ":" ;
          else
               //otherwise append "b" and a colon to currentTime string
               currentTime = currentTime + b + ":" ;
          if (c < 10)                    //if seconds are less than ten
               //append a zero to string currentTime, then append "c" and a colon
               currentTime = currentTime + "0" + c ;
          else
               //otherwise append "c" to currentTime string
               currentTime = currentTime + c;
}          //end of the Clock class

Wow.
1) Please in future use the code tags to format code you post so that it doesn't think you have italics in your code and render it largely1 unreadable. Read this
http://forum.java.sun.com/help.jspa?sec=formatting
2) You commented out the import of java.util which is the problem you are complaining about.
3) Are you planning to stick all the code you ever write into the one source file? Why is all this stuff rammed together. Yoinks.

How to upload mass characteristic & class data.

Hi Team,
How to upload mass characteristic & class data. Is any BAPI or program available for this. LSMW is not working for this upload. Pls suggest.
Thanks

Hi,
Following are BAPI available-
1) BAPI_CLASS_CREATE Create Class BAPI
2) BAPI_CHARACT_CREATE BAPI for Characteristics u2013 Create
For more BAPI List go to link [http://www.sapbapi.com/bapi-list/|BAPI LIST]
You can use Ecatt for upload mass characteristic & class data. For Ecatt you go through this link [http://www.****************/Tutorials/eCATT/SAPGUIRecording/demo.htm|Ecatt Link]
Regards,
Ashish
Edited by: A. A. Vaidya on Aug 14, 2009 9:20 AM

Bug?: Using waveform prims to unbundle class data

I discovered this the other day and figure it's not something that NI intentionally permits. Feel free to correct me if this is expected behavior.
Attaching a class wire to a Get Waveform Components prim allows you to unbundle the class data. This works on IPE waveform border nodes too.
(Cross posted to Lava.)

I discovered this the other day and figure it's not something that NI intentionally permits. Feel free to correct me if this is expected behavior.
Attaching a class wire to a Get Waveform Components prim allows you to unbundle the class data. This works on IPE waveform border nodes too.
(Cross posted to Lava.)

CLASS-DATA in OO ABAP

Hi,
I know the definition of CLASS-DATA in OO concept. I understand that it can be accessed by on CLASS-METHODS.
But what is the use of it ? Why do we need static data ?
Is this different fro STATICS we use in procedural ABAP.
Regards,
Rajesh.

If there are multiple instances of the class, the data area is shared between all instances, which means when instance 1 of the class sets the value, then all other instances have the attribute with the same value, I believe that iit points to the same memory. Here is an example app, notice that then the first object is created, it sets the value, then when writing out the objects, both instances see the same value for NUM1 even though only the first object actually filled the value, so the second is looking at the same memory area because it is labeled as CLASS-DATA.
report zrich_0001.
*       CLASS lcl_tst DEFINITION
class lcl_tst definition.
public section.
    class-data: num1 type n.
    data: num2 type n,
          num3 type n.
    methods: constructor importing im_num1 type n
                                   im_num2 type n
                                   im_num3 type n.
endclass.
*       CLASS lcl_tst IMPLEMENTATION
class lcl_tst implementation.
method constructor.
    if not im_num1 is initial.
      num1 = im_num1.
    endif.
    if not im_num2 is initial.
      num2 = im_num2.
    endif.
    if not im_num3 is initial.
      num3 = im_num3.
    endif.
endmethod.
endclass.
data: o_tst type ref to lcl_tst.
data: o_tst_list type table of ref to lcl_tst.
data: no_value type n.
start-of-selection.
create object o_tst
        exporting
             im_num1 = '3'
             im_num2 = '4'
             im_num3 = '5'.
append o_tst to o_tst_list.
create object o_tst
     exporting
          im_num1 = no_value
          im_num2 = '6'
          im_num3 = '7'.
append o_tst to o_tst_list.
loop at o_tst_list into o_tst.
    write:/ o_tst->num1, o_tst->num2, o_tst->num3.
endloop.
Regards,
Rich Heilman

Attempting to understand object/class data and the actor framework...

I'm currently trying to understand why changing a typedef within class data of a class (named measurement.lvclass) causes all of the "launch nested actor" vi's to break. I feel like I'm trying to use a ratchet with a phillips screw or something, is there something I'm fundamentally missing here?
I was under the impression that you can populate class data clusters with information that might require read/write in different methods (the vis in the measurement class called by the do.vi of that particular msg class... we still call them methods right?).
thx

Thanks for the tips, theyre appreciated,
I think I can chalk this one up to a lack of communication with another developer on the project... We actually found a realy interesting issue involving a type def input on a subvi where any updating of it causes labview to crash when you attempt to save that subvi. if I get time I want to try to isolate it and maybe post it up here for a closer look under more experienced eyes... due to being under pressure, we had to disconnect form the type def and basically update it manually which is a PITA but got the system running...
thanks again
-pat

SATATIS of Procedural ABAP compared with CLASS-DATA of OO ABAP.

Hi,
Is the STATICS statement in procedural ABAP synonymous to CLASS-DATA in OO ABAP.
Please help.
Regards,
Rajesh.

Hello Rajesh
The strict answer is: no, they are different. However, they share things in common.
That's what the SAP documentation says about STATICS:
<a href="http://help.sap.com/saphelp_erp2005/helpdata/en/9f/db982c35c111d1829f0000e829fbfe/content.htm">Local Data in the Subroutine</a>
<b>Static Local Data Objects</b>
<i>If you want to keep the value of a local data object after exiting the subroutine, you must use the STATICS statement to declare it instead of the DATA statement. With STATICS you declare a data object that is globally defined, but only locally visible from the subroutine in which it is defined.</i>
Class-data are also globally defined yet they are valid everywhere within your class. That is different from local static variables that are only visible within the FORM routine where they are declared.
Regards
Uwe

Class Data Sharing for User Defined Classes

i am using jdk 5.0 . JDK 5.0 supports class data sharing for system level classes. Is there any way a class data sharing be done for a user defined class?

Samantha10 wrote:
Is this class data sharing possible for user defined classes also? i have a singleton class which i am invoking through a script. The script has been scheduled to run every 1 sec . Since it is being invoked every 1 sec hence the singleton pattern is failing . Hence if the this class data sharing is possible then the singleton pattern can be made applicable.If you have a single process and you have a single class loaded by two different ClassLoader instances
in some respects they will be two different classes
if (class1 instanceof class2.getClass())returns false.
This is not the case for Java core classes because they are always loaded by the SystemClassLoader.
You write you
have a singleton class which i am invoking through a script. What approach to you use to invoke the singleton?
I am trying to figure out if you launch a new JVM every second...
Maybe you can use Nailgun.

Javaagent and class data sharing with Java 6.0

Hi,
I'm trying to use instrumentation (using the -javaagent) but
I noticed that when I run the my application with JDK 1.6 it loads all system
classes from the "shared objects file" and the transformer has no chance to run.
With JDK 1.5 it works fine, as well as in debug mode of JDK 1.6.
Is this normal or it is a bug? If it is normal, how should I instrument the system classes?
Thanks in advance,
Genady

I just found that the reason it was working for me with JDK 1.5 is that my classes.jsa file was corrupted for some reason.
So the behavior is consistent for both JDK 1.5 and 1.6.
I also found that if I add
Can-Redefine-Classes: true to the manifest (even if I don't do any class redefinitions) it causes the class data sharing to be disabled.
This workaround is good enough for me.
Genady

Using class data in actor user interface?

This may have been asked before but I've not been able to find anything so far...
I'm starting to play with the Actor framework in LV2012 and have run into a dilemma. The system I'm setting up is a fairly common one consisting of test stand control, data acq, logging, control interface, and a "spectator" interface that displays live data for the user(s). To accomplish this, I have a top level actor that implements the control interface and logging which launches several nested actors that handle stand control and data acq across multiple front ends. While this works very well for data that comes purely from the measurement front ends, I'm having trouble cleanly integrating meta-data that is generated by the user.
Each message coming from an actor farther down the tree can be logged by the top level actor by maintaining the log file information in the class private data. However, any data generated on the UI of the Actor Core cannot be logged by using the class data in the Actor Core as there is no guarantee that the class data in the Core is the same as that in the message handler, correct? For instance, say my class data has a log file path and a group name for the TDMS write VI. If my user wants to add a note to that group, I could use the class data in the Actor Core to write the note as a property. No problem. But what if the active group is decided by a message coming from my front end? Then the group name in the parent actor core is different than the one in my Actor Core with the UI. The note would land in the wrong group. So far I have a couple ideas on how to make this work:
1.) Send relevant update messages from the Actor Core to the top level actor using self-to-self enqueuer so that the class data matches. This seems clumsy as it would require a lot of code duplication.
2.) Remove all actual functionality from the Actor Core. Any UI event would pass data via a message using the self-to-self enqueuer. This still seems clumsy, but at least would require less duplication (though the same amount of messages). It would require passing references to all feedback indicators into the class data.
3.) Consolidate all metadata generation in the Actor Core and create an additional actor which only logs data. Any message containing data for logging would be forwarded from the top level actor to the Logging actor. This would provide a consistent strategy for logging data produced by both the user and other actors, and therefore seems like the best idea.
Does anyone have thoughts on this one? I'm still pretty undecided as to how best to solve this little issue, and I'm sure others have encountered this before.
Thanks.
CLAD

Hi testingHotAir
I just wanted to check in to see if things were working for you with your approach to the solution. It looks like you have a pretty good structure going so it seems like things are set. If you still have questions could you post an example of what you are trying to accomplish? I know my brain sometimes has a hard time grasping the concept of words and has an easier time with actually following code paths.
If things are working then great!
Regards,
James W.
Applications Engineer
National Instruments

Class Data Sharing

I am trying to benchmark memory footprint using the class data sharing feature on Solaris8 and Solaris9.
I wrote a small sample java program MyApp.java as follows,
     import java.lang.*;
     public class MyApp {
          public static void main(String[] args) {
               System.out.println("Java VM Version Number = " + System.getProperty("java.vm.version"));
               long maxMem = Runtime.getRuntime().totalMemory();
               System.out.println("Total Memory in bytes= " + maxMem);
               long freeMem = Runtime.getRuntime().freeMemory();
               System.out.println("Free Memory in bytes= " + freeMem);
               long memUsed = maxMem - freeMem;
               System.out.println("Memory Used in bytes= " + memUsed);
               long t1 = System.currentTimeMillis();
               for (int i = 0; i < 3; i++)
                    try
                         System.out.println("iteration count = " + i+1);
                         Thread.sleep(1000 * 60);
                         long t2 = System.currentTimeMillis();
                         long t3 = t2 - t1;
                         System.out.println("time elapsed in milliseconds = " + t3);
                    catch (InterruptedException e)
     $JAVA_HOME = /packages/sun/j2sdk1.5.0_02/jdk1.5.0_02/
     I ran it both the machines with the following options
     1)     $JAVA_HOME/bin/java �client �Xshare:on MyApp
     2)     $JAVA_HOME/bin/java �client �Xshare:off MyApp
     I ran the pmap command with �x option to get the readings
     A) Solari8:
          VM Option     RSS          Shared Mem          Private Mem
          Xshare:on     53584KB     50600KB          2984KB
          XShare:off     11456KB     7808KB          3648KB
          JDK1.4     29736KB     26392KB          3344KB
     B) Solaris9:
          VM Option      RSS          Anonymous mem
          Xshare:on     49384KB     3048KB
          Xshare:off     48576KB     3704KB
          JDK1.4     33656KB     2856KB
     These numbers repeat for multiple instances of the same application.
     I do not see the expected memory savings.
     I am trying to find out if I am missing any step in the process of using
     Class Data Sharing feature of JDK1.5
Thanks!!

Samantha10 wrote:
Is this class data sharing possible for user defined classes also? i have a singleton class which i am invoking through a script. The script has been scheduled to run every 1 sec . Since it is being invoked every 1 sec hence the singleton pattern is failing . Hence if the this class data sharing is possible then the singleton pattern can be made applicable.If you have a single process and you have a single class loaded by two different ClassLoader instances
in some respects they will be two different classes
if (class1 instanceof class2.getClass())returns false.
This is not the case for Java core classes because they are always loaded by the SystemClassLoader.
You write you
have a singleton class which i am invoking through a script. What approach to you use to invoke the singleton?
I am trying to figure out if you launch a new JVM every second...
Maybe you can use Nailgun.

Class Data Sharing : what the definition of JSA ?

Hi everybody,
I read the article on Class Data Sharing (http://java.sun.com/j2se/1.5.0/docs/guide/vm/class-data-sharing.html) and they speak about the file classes.jsa
I'm curious and I would like to know the definition of JSA extension.
Maybe JavaSharedArchive ?
google say me that JavaSharedArchive is used by Mac but not by JRE1.5 !
Thanks for your explications !
Obelix

Since the point of using a hotspot is to provide data to other devices, the answer to your question is YES.

Class Data

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