XmlEncoder & transient

Hi All, a question regarding the use of transient when serialising to xml using the XMLEncoder class. I'm serialising a graph of java objects contained in a vector to xml, in some of the classes I have member variables I don't want serialised so I mark them transient. However, these are still being serialised, the only way I can seem to prevent this is to remove their getters & setters. Is there some bug regarding the use of transient with the Encoder or is it not intended to be used by it in the first place?
At the moment, if I have member variable's that need their getters & setters but I don't want serialised, I have to reset them when I deserialise the xml, otherwise I just remove the getters & setters in the first place. Not a very elegant solution though, precisely the reason transient is there in the first place I think. Any suggestions as to why the serialisation seems to ignore transient are welcome.
Thanks in advance
Damien

Transient only works for the "normal" serialisation. If you want the XMLSerializer to ignore some variables, use a static block in the class declaring them so.
public class TestBean {
     private int eins;
     private int zwei;
     private transient int drei;
     public TestBean(){
     public TestBean(int eins, int zwei, int drei){
          this.eins=eins;
          this.zwei=zwei;
     this.drei=drei;
     /* ... getters and setters ... */
     static{
          try{
     BeanInfo info = Introspector.getBeanInfo(TestBean.class);
     PropertyDescriptor[] propertyDescriptors = info.getPropertyDescriptors();
     for (int i = 0; i < propertyDescriptors.length; ++i) {
          PropertyDescriptor pd = propertyDescriptors;
          if (pd.getName().equals("drei")) {
               pd.setValue("transient", Boolean.TRUE);
} catch (IntrospectionException e) {

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Java 5 Enums serialization with XMLEncoder...

Hello,
I'd like to know why a bean attribute whose type is a Java 5 enum is
not saved when using XMLEncoder. This field is in fact ignored...
Anybody knows how to persist such fields using standard JDK (I mean
no third party library) ?
public enum TestBeanEnum {
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...Only the attribute a0 is not saved all over, even relatively complex data
types are automatically persisted.
I also find a strange behavior, the keyword "transient" seems to be ignored
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Thanks for all,
David Crosson.

looks like a bug to me
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5015403

XMLEncoder runtime problem

I'm trying to use XMLEncode for the first time.
I have a simple class TextPanel which extends JTextPane. It overrides the paint() method and adds a setRotation() and getRotation() method. The few member variables all have get/set methods.
When I apply encoder.writeObject() to an instance of TextPanel I get this message:
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can not access a member of class TextPanel with modifiers ""
Continuing ...
java.lang.Exception: XMLEncoder: discarding statement XMLEncoder.writeObject(TextPanel);
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--gary

That's what it seems to be saying, but all the methods are public, and all correctly named.
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Previewing Transients in Loops?

Hi there,
I've got two questions regarding transients in Apple Loops.
If I create an Apple Loop from an audio sample I have, the transients differ in the Logic Sample Editor to how they are when I open the loop in Apple Loops Util.
For example, let's say I've 'rhythmically' sliced a drum loop with a transient at each hit, when I open it in Apple Loops Util, the transients just show at regular intervals as selected in the toolbar (1/4s, 8ths, 16ths, etc etc). Is there a way to keep the transients from the Sample Editor?
Also, when working with transients in the Apple Loops Utility, is there a way to preview the audio between transients. Like when you double click a section between transients in the Sample Editor, you can play back just that slice.
Thanks

exo wrote:
Okay, let me try again. I need three loops. Two loops start at the same time one runs fast one runs slow. The slow one is probably independent to the problem. When the second loop is done, it needs to restart and start a third loop that takes less than the second.
This is all still very vague. You are omitting crucial information.
Which one is the "second loop". Slow or fast?
What is the meaning or "probably" in this context?
Should the first loop continue forever?
What determines if the second loop is done?
What does the third loop do during that one second? Is it actually looping many times or is it just executing some code once?
What should happen after the third loop is done?
It might be much easier if you could describe your problem from a real-world perspective instead of programming terms.
What is it suppused to do? What is is controlling? What behavior should the user see?
Message Edited by altenbach on 04-28-2008 08:32 AM
LabVIEW Champion . Do more with less code and in less time .

How to retrieve the values from a Transient View Object

Hi Experts,
I am using Jdevelpoer11.1.1.5.0. I created one Transient view object with attributes EmpId,Salary.
In Backing Bean i will create rows for that view object and display it in the form of <af:Table> like Empid, Salary and an Update Link.
Now my problem is i want to update the salary of the particular EmpId. For Example if the EmpId is 100 and salary is 10000 now i want to increase the salary to 20000 and if i click on the update button; i want to retrieve the particular employee details in my backing bean. How can i acheive this?
Thanks in advance.

A better approach would be to programmatically populate rows in the <VO>Impl.java by overriding the executeQueryForCollection(0 as specified here -
http://adfpractice-fedor.blogspot.in/2011/01/adf-bc-programmatically-populated-vo.html
You can write the logic to update the salary in an AM method then on click of Update or in the getter of Salry field if logic is valid for all fields...

Transient persestant memory-begin abort transaction-arraycopynonatomic

If array defined as transient, then abort doesnt make any sense, chages are not rolled back.(Both for arrayCopy and arraycopyNonAtomic functions)
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byte hello[] = {'H','E','L','L','O'};
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          //byte[] key_buffer = new byte[16];
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If array not defined as transient and if arrayCopy is used then abort works
If array not defined as transient and if arrayCopyNonatomic is used then abort not works
     public void AtomicNonatomic()
          //byte[] key_buffer = JCSystem.makeTransientByteArray((byte)16, JCSystem.CLEAR_ON_RESET);
          byte[] key_buffer = new byte[16];
          JCSystem.beginTransaction();
          //Util.arrayCopy(hello, (short)0, key_buffer, (short)0, (short)5);
          Util.arrayCopyNonAtomic(hello,(short)0, key_buffer, (short)0, (short)5);
          for(byte i =0; i<2; i++)
          key_buffer[i]=0;
          JCSystem.abortTransaction();
As a result begin-abort-commit should be used with non-transient arrays and without arrayCopyNonatomic function.
Edited by: simeranya_00 on Aug 7, 2010 6:51 AM
Edited by: simeranya_00 on Aug 7, 2010 6:56 AM

Check out JCRE specification. Therein you will find what is (not) part of a transaction.
1. All global arrays are not part of a transaction
2. All transient fields/arrays/keys are not part of a transaction
3. OwnerPIN object is not part of a transaction
4. All Java Card API methods are transactional, except arrayCopyNonAtomic and arrayFillNonAtomic
Lifetime of a transaction
begin <--> commit
begin <--> abort < -- rollback
begin <--> JCRE context (process method exit) < -- abort transaction (done by JCRE) < -- rollback
begin <--> uncaught exception < -- abort < -- rollback
begin <--> tear/reset < -- rollback

Problem with XMLEncoder for complex java object i

Hi All.
My problem with XMLEncoder is it doesnt transfrom java objects without default no arguement constructor. I was able to resolve this in my main java object class, by setting a new persistence delegate, but for other classes that are contained in the main class, they are not being encoded.
Thanks in advance for your answers

Better to put this in java forum :-)
Just check, if this helps.
http://forum.java.sun.com/thread.jspa?threadID=379614&messageID=1623434

Doubt in transient and volatile

Hi,
I have doubt in using transient n volatile modifiers
class Test
public static final transient int i=1;
public static final volatile int i=1; //line 1
}If i use final n volatile ,having a comp err like
illegal combination of final and volatile.. line 1..while i dont have any problem with
final transient
I didnt understand the reason..Can anyone pls explain?
Thnx.
Mysha.

this is just off the top of my head, so it might not be strictly accurate, but:
transient has to do with serialization, it means that field won't be serialzed. Of course, for a static final variable, it's I'm not sure, but that could be a redundent modifier, as I'd think the reconstituted class still has whatever it's static final contents are anyway.
volatile has to do with synchronization and access across threads, and since you can't change a final variable's value once initialized, volatile is contrary to what final is saying. So it's either one or the other.

Send E-mail from Oracle (9.2.0.1) : SMTP transient error: 421 Service not a

I have used Oracle 9i server (9.2.0.1 version) on Windows XP machine(with SP2).I want to send Email from PL/SQL procedure.
My Question is what sort of configuration needed to perform this activity?
I have installed IIS (Internet Information Service)
in my machine, then configure my SMTP mail server
with a valid email id and password given TCP port 465.
Later I came to know that to send Email from PL/SQL I have to install Oracle JServer Code. Follow three steps. the steps are
1. Execute the script as sys "$ORACLE_HOME\javavm\install\initjvm.sql"
2. Execute the loadjava classfile as
$ORACLE_HOME\plsql\jlib>loadjava -f -v -r -u sys/**** plsql.jar
3. Execute the script as sys "$ORACLE_HOME\rdbms\admin\initplsj.sql"
I sucessfully executed the first step, but for the second step iam not able to locate the plsql.jar file in the specified path.
So Please tell me if there is any other method to perform this task
My code is as follows.
CREATE OR REPLACE PROCEDURE SEND_MAIL (
                              msg_to varchar2,
                              msg_subject varchar2,
                              msg_text varchar2
                              IS
                              c utl_smtp.connection;
                              rc integer;
                              msg_from varchar2(50) := '[email protected]';
                              mailhost VARCHAR2(30) := 'mail.google.com';
                         BEGIN
                              c := utl_smtp.open_connection(mailhost, 465);
                              utl_smtp.helo(c, mailhost);
                              utl_smtp.mail(c, msg_from);
                              utl_smtp.rcpt(c, msg_to);
                              dbms_output.put_line(' Start Sending data');
                              utl_smtp.data(c,'From: Oracle Database' || utl_tcp.crlf ||
                              'To: ' || msg_to || utl_tcp.crlf ||
                              'Subject: ' || msg_subject ||
                              utl_tcp.crlf || msg_text);
                              dbms_output.put_line(' Finish Sending data');
                              utl_smtp.quit(c);
          EXCEPTION
               WHEN UTL_SMTP.INVALID_OPERATION THEN
dbms_output.put_line(' Invalid Operation in Mail attempt using UTL_SMTP.');
               WHEN UTL_SMTP.TRANSIENT_ERROR THEN
dbms_output.put_line(' Temporary e-mail issue - try again');
WHEN UTL_SMTP.PERMANENT_ERROR THEN
dbms_output.put_line(' Permanent Error Encountered.');
END;
Procedure Created.
SQL> execute prc_send_mail('[email protected]','[email protected]','Good Morning.');
BEGIN prc_send_mail('[email protected]','[email protected]','Good Morning.'); END;
ERROR at line 1:
ORA-29278: SMTP transient error: 421 Service not available
ORA-06512: at "SYS.UTL_SMTP", line 17
ORA-06512: at "SYS.UTL_SMTP", line 96
ORA-06512: at "SYS.UTL_SMTP", line 374
ORA-06512: at "SCOTT.PRC_SEND_MAIL", line 19
ORA-29278: SMTP transient error: 421 Service not available
ORA-06512: at line 1.
Please tell me how to solve this problem.
Thank You.

1) Why did you install an SMTP server locally and then tell your code to try to use the server mail.google.com?
2) The error you're getting is from mail.google.com indicating that Google isn't running an open SMTP server there. I would be very surprised if Google were running a publicly available SMTP server anywhere since that would be an invitation for spammers.
Justin

How to Use Transient View Objects to Store Session-level Global Variables

hi
Please consider section "40.8.5 How to Use Transient View Objects to Store Session-level Global Variables"
at http://download.oracle.com/docs/cd/E14571_01/web.1111/b31974/bcstatemgmt.htm#ADFFD19610
Based on this documentation I created the example application
at http://www.consideringred.com/files/oracle/2010/ProgrammaticalViewObjectAndRollbackApp-v0.01.zip
It behaves as show in the screencast at http://screencast.com/t/qDvSQCgpvYdd
Its Application Module has a Transient View Object instance "MyEmployeesContextVOVI", as master for the child View Object instance "EmpInCtxJobVI".
On rollback the Transient View Object instance keeps its row and attribute values.
Also when passivation and activation is forced (using jbo.ampool.doampooling=false ) the Transient View Object instance seems to keep its row and attribute values.
questions:
- (q1) Why does the expression #{bindings.MyEmployeesContextVOVIIterator.dataControl.transactionDirty} evaluate as true when a Transient View Object instance attribute value is changed (as shown in screencast at http://screencast.com/t/qDvSQCgpvYdd )?
- (q2) What would be a robust approach to make a Transient View Object instance more self-contained, and manage itself to have only one single row (per instance) at all times (and as such removing the dependency on the Application Module prepareSession() as documented in "5. Create an empty row in the view object when a new user begins using the application module.")?
many thanks
Jan Vervecken

Thanks for your reply Frank.
q1) Does sample 90 help ? http://blogs.oracle.com/smuenchadf/examples/
Yes, the sample from Steve Muench does help, "90. Avoiding Dirtying the ADF Model Transaction When Transient Attributes are Set [10.1.3] "
at http://blogs.oracle.com/smuenchadf/examples/#90
It does point out a difference in marking transactions dirty by different layers of the framework, "... When any attribute's value is changed through an ADFM binding, the ADFM-layer transaction is marked as dirty. ...".
This can be illustrate with a small change in the example application
at http://www.consideringred.com/files/oracle/2010/ProgrammaticalViewObjectAndRollbackApp-v0.02.zip
It now shows the result of both these expressions on the page ...
#{bindings.MyEmployeesContextVOVIIterator.dataControl.transactionDirty}
#{bindings.MyEmployeesContextVOVIIterator.dataControl.dataProvider.transaction.dirty}... where one can be true and the other false respectively.
See also the screencast at http://screencast.com/t/k8vgNqdKgD
Similar to the sample from Steve Muench, another modification to the example application introduces MyCustomADFBCDataControl
at http://www.consideringred.com/files/oracle/2010/ProgrammaticalViewObjectAndRollbackApp-v0.03.zip
public class MyCustomADFBCDataControl
extends JUApplication
@Override
public void setTransactionModified()
    ApplicationModule vApplicationModule = (ApplicationModule)getDataProvider();
    Transaction vTransaction = vApplicationModule.getTransaction();
    if (vTransaction.isDirty())
      super.setTransactionModified();
}Resulting in what seems to be more consistent/expected transaction (dirty) information,
see also the screencast at http://screencast.com/t/756yCs1L1
Any feedback on why the ADF Model layer is so eager to mark a transaction dirty is always welcome.
Currently, question (q2) remains.
regards
Jan

How can i remove services from the transient name service?

hello all..
i am using the transient name service and i would like to remove a service if a server goes down...how can i do that?

hmm the thing is were to put the statement... after the code that makes the server waits for invocations?
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Aggregate value of a transient field is not updated from cache

Hello together,
A view object has a transient field which display the count of records from a view accessor. In the EO for the view object ( of the view accessor) opearations on rows are perfomed from a different view object, this changes are not reflected in the transient field value.
I know is not very clear,here is sample:
Woker VO
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Department VO
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I've try to executeQuery on each view object,without success. I've notice that the WorkerCounter VO is having always the same records count after Worker2Department VO is updated.
If the method getDBTransaction().postChanges() is invoked, then the data is correctly fetched but then there are different other problems, and i would like to avoid using of postChanges().
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Thank you a lot,
Bogdan

Hi,
If you place the 0WBS_ELM_EX in the ODS ,either in the key field or in the data field , you can find it as a charecteristic in the report and you can drag it into the rows.
To reflet the changes that you made to the masterdata , you need to run the attribute change run every time you load the data .
regards,
haritha

How to reference a custom property in a vo transient attribute expr + bug

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This is wrong
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Error while creating Transient Attribute in VO

Hi.,
I am using jdeveloper 11.1.1.5.,
I had created a GlAcctYearlyBalEO with corresponding VO., I had created an transient attribute GaybCurrBal with type BigDecimal., While i am trying to create another transient attribute GaybCloseBal with type BigDecimal I am getting an error as
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Hello wilhelm,
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Experts,
I migrated my JDev 11.1.1.5 project to JDev 11.1.2. After successful migration i began to run the project and it ran without issue. In the application however when i clicked on any link or button i get the following exception
oracle.jbo.JboException: JBO-29000: Unexpected exception caught: java.lang.NullPointerException, msg=Cannot get property 'saleType' on null object
Caused by: java.lang.NullPointerException: Cannot get property 'saleType' on null object
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In my SaleVO i have a transient attribute whos value is set as
adf.userSession.userData.saleType == 'ORGANIZATION' ?
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Please advice
Jdev 11.1.2

Hi,
this is something you should report to customer support to have them looking at this and helping you out
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