How synchronize EJB diagram with database

hi
i need synchronize EJBv3.0 entity diagram with database but when i click in diagram the connection of database is deactive.
in BC diagram e synchronize entity with database with not problem but ejb entity i not, why?
i work in Jdev 11.1.1.0.2.
best regards

hi ...
i change the database table and i want to refresh the EJB entity, how do this?
best regards

Similar Messages

Keeping Entity EJBs synchronized with Database

Is it possible that container managed persistance takes care of synchronizing entity beans' states with database record even if there is some external non-Java application that changes the state of the records straigth at database?
For example:
1. I map CMP entity bean to a database table's row and query it's state from J2EE client
2. I modify some data releted to that particular bean in the database: change some values by command line (SQL+ at the case of Oracle) on the row in the table in the database
3. I query again the same bean's state
Now, is the state I will get at the section 3 the same I got at section 1? If so, then CMP hasn't synchronized the bean's state and I get wrong value when reading it at second time.
Can I automatize this synchronization task some how? This is very important issue when trying to take J2EE architecture in use on old legacy database systems which still have their own non-J2EE clients running.

So if the entity bean is not used in a transaction it's state will not be re-read from the database, correct?There is no such thing.... if you invoke an entity bean in an unspecified transaction context I believe the spec defines it as a non-deterministic situation but in general the state will be re-read(but why would you want to do that?).
Has the container do a database query for each read of B bean state?This is a vendor specific issue.... it depends on your EJB container provider, I know some vendors have all kinds of configurations to optimize these situations.
Which are all the situations when an entity bean's state is (re-)read from the database?In general the state will be re-read at the first time a bean is invoked in a single transaction, but vendors offer a lot of mechanisms to configure all kinds of "sunchronization strategies".
Do you really mean that every time I read a bean's state it will be the same with the database?
Is there any exceptions? The important thing to notice is that we have to assume that state of the database
changes all the time by non-J2EE legacy clients. You should be able to control this with the locking mechanisms(as mentioned before) that your container and RDBMS provides. in your situation, it sounds like pessimistic concurrency control would be appropriate.

How to connect java with database without any dsn.

is there any way to connect java with database with out creating any dsn..like we do in ado in vb by providing provider.

Sure use a type 4 driver. No DSN.

[b]How can i connect with database(oracle 9i) from form developer at runtim

Hi Friends,
My problem is as follows, please show me a way.
Let's asume, I have form (developed in 6i) which has database data block. Now, at form level a have assigned on_logon trigger and I have written the following PL/SQL statement in that trigger:
begin
null;
end;
So, when I run this form without connecting to database It does not prompt for a connection. Now I have button lebeled as "Connect" in this form, when user will click on it it will display a window having text boxes to enter user name, password and database name; once the user fill those text boxes and click on a button lebeled as "Ok" then the form runtime environment should be connected with database as per information provided by user. Here to mention that the user already been created, only the connection will be stablished. For example: I want to connect the form with database as "scott/tiger@oradata9i".
To do this, what PL/SQL command statement should i write in that "OK" button's "when_button_pressed" trigger?
If any of you know about this please help me.

Hi
I've answered this question already. If I understand you right, you can use 'LOGON' built-in of Forms. Take a look into documentation.

How to Synchronize an association with Database Changes

Hi,
I was wondering if someone has any ideas about how to manage FK changes with the BC associations. In general my questions center around tooling support for re-factoring associations and syncing them with db changes. I have read the following but all these discuss entity attribute related changes which are simple to manage.
http://download.oracle.com/docs/cd/E14571_01/web.1111/b31974/bcentities.htm#ADFFD169
http://jdeveloperfaq.blogspot.com/2010/02/faq-15-how-to-synchronize-adf-entity.html
Re: How to manage ADF BC components in the case of datamodel changes
I have 4 use cases.
Case 1: When an association is added to the db, how does one bring it to the BC layer.
Case 2: Deletion of an association from db is easy to manage because once it exists in bc layer, it can be treated as a valid one at the model later regardless of its existence on the db.
Case 3: When an association is modeled in BC layer and a corresponding FK does not exist in DB. How does one turn that association into a physical FK in the db if one wants to install a FK. What is the naming convention for installing such a db FK constraint that can sync easily with tooling. I understand that it is not necessary to have a physical FK as the BC layer will take care of enforcing the relationship. But my requirement is that first the modeling at bc layer can go on and then the constraint can be implemented at a later date.
Case 4: When a FK is renamed in db how does one reconcile that with a previously created association at the model layer based on an old fk with a different name.
Thanks,

The synchronize with DB will pick up new FK defined in the DB and will suggest to add them to your ADF BC layer.
You can also generate DB objects from your ADF BC layer.
Drag your ADF BC into an ADF BC diagram, select all of them, right click and select Generate Business Object->Database Objects
This will create the objects in the DB - note though that this will override your DB objects.

How to use JTable with DataBase

Dear All,
how can i show a table in a frame that containes a data from a database, then can edit , add and delete some records in the database
thnx 4 all

Hi
I've used below codes for fetching data in JTable.
try{
           DataRequest = Db.createStatement();
           Results = DataRequest.executeQuery("SELECT * FROM Employee");
           rm = Results.getMetaData();
           col = rm.getColumnCount(); //getColumnCount and store it in integer variable col;
           Vector colNames = new Vector();
           for (int i = 1; i<= col; i++){
             colNames.addElement(rm.getColumnName(i));
           while(Results.next()){
                Vector row = new Vector();
               for(int i = 1; i <= col; i++){
                   row.addElement(Results.getObject(i));
               data.addElement(row);
           jDataTable.setModel(new DefaultTableModel(data,colNames));
           jDataTable.revalidate();
           Results.close();
        catch (SQLException sql){
            JOptionPane.showMessageDialog(this, "Cannot connect to Database"+sql,"Error", JOptionPane.WARNING_MESSAGE);
        }Hope you satisfied with this code.

How to coonect developer with database

hi all
please help me with connect developer suite 10g with oracle database 10g
it gives me this error when i want to connect to a user
cannot connect TNS listener
Thanks

Hi,
Did you check the tnsnames.ora file contains the connection identifier in the folder *<dev_suite_home>\NETWORK\ADMIN*. And if it is not, then just copy the tnsnames.ora file from *<oracle_home>\db_1\NETWORK\ADMIN* to *<dev_suite_home>\NETWORK\ADMIN* and check.
Regards,
Manu.
If my response or the response of another was helpful or Correct, please mark it accordingly

Cannot 'Synchronize with database' my entity objects

Hello,
I have successfully created entities in my model using the 'new buisness components from tables' function. But now my database moddel has changed and I would like to synchronize my entities with database to get newest colums, but when right clicking an entity, the 'Synchronize with database' link is greyed and cannot be selected.
I have a database connection configured in my application resources and I can still import new tables in my project.
Do you have any idea of what is happening? This is not the case for all my applications. I can still synchronize in some other ones
Thank you for your help
Stephane

Synchronize with the database will be avaialble for the Entity Object
I think there is a problem with the particular entity that got created when you did the business components out of tables..
This is not the case for all my applications. I can still synchronize in some other onesif this is not happening with any other EO in any other application.. then you can try
recreating the EO from the table..
compare what is the change in between the EO that can synchronize and your current EO that cannot synchronize..
another option might be to check the application.. if that is havign some hidden property to synchronize..
last is to go with sameer's approach, to doubt about the table is not proper... in the same applciation create an EO with another table and try to synchronize.. you will get to actually the point where there is a problem..
good luck.

How to share things with aplication express?

The most important thing for using a database is sharing things, but why I grant even all of one of my table to one user, but she even cannot use it, just say: error; userxxx don't have the right to access the content?
Very strange, and the Synonm is also no good, I create one for another user's table, like create synonm XXX for username.tablename.
but when I want to : Select x,x.x, from xxx, it doesn't work!!!
how to share things with Database?

Better to give you some photos that can let you see
the problem , but that can not happen here.Actually, you can use pictures. Do a screen capture where you're having the problem, upload it to http://tinypic.com and then put the link to the picture here in your posting.
Please be noticed all , me and the users don't know
much about SQL, I know some. So everything has to be
done in the GUI interface.Well, the GUI isn't always enough. If you want to do grants you really need to use the SQL command window - and learn the proper syntax for the grant operation.
I(A) grant select , update, insert on A.xx to user
B,
but they see onthing in ther Application Express, how
can they do insert and all works just like I do ? What is the parsing schema for your application? Is it set to the schema where your data lives?
Earl

How Middle Tier connect to Database Tier?

Desktop tier never directly interact with Database tier. It is the Application tier which is also called Middle tier that connect to Database tier to fullfill the end user request.
My question is how Application tier interact with Database tier under the hood?
I know Middle tier consist of Forms Server, Report Server, Concurrent Server, Web Server, Administration Server.
Let's say I want to know how Concurrent Server connects to Database tier? which file or connection does it use?
Similery how does Forms Server, Reports Server, Web Server interact?
Any overall/broad picture of this whole structure?
Thanks,

Refer to [Oracle Applications R12 Concepts|http://download.oracle.com/docs/cd/B40089_09/current/acrobat/120oacg.pdf] and [Oracle Applications 11i Concepts |http://download-uk.oracle.com/docs/cd/B25516_14/current/acrobat/11iconcepts.pdf] manuals, it is explained properly there.

How to Synchronize Test Instance with Production database on regular basis.

Hello
How to Synchronize Test Instance with Production database on regular basis.
I want to update my Test Instance with Production ERP on daily basis without downTime.?

Hi,
I recomend to configure physical standby database for your production and when ever you requir open standby Using a Physical Standby DB in Read Write Mode and Flashback DB, so that you can revert all the changes back and put the db in sync. Please follow below metalink notes.
Business Continuity for Oracle E-Business Release 12 Using Oracle 11g Physical Standby Database (Doc ID 1070033.1)
Business Continuity for Oracle E-Business Release 11i Using Oracle 11g Physical Standby Database - Single Instance and Oracle RAC (Doc ID 1068913.1)
Business Continuity for Oracle Applications Release 11i, Database Releases 9i and 10g (Doc ID 216212.1)
update my Test Instance with Production ERP on daily basis without downTime.?With zero down time is not possible I think.

Can't drop database table objects on a EJB Diagram.

JDeveloper 10.1.3 EA.
When I drop a database table object on a EJB Diagram the error below occurs. Also dropping components from the Component Palette doesn't work. A wizard opens, but after completing that, nothing is on the EJB Diagram.
However, after dropping a table and a restart of JDeveloper, there is an empty 'tablename EJB' on the EJB Diagram, but a click with the mouse on it generates the same error as the drop did.
Simular errors occur with JDeveloper 10.1.2, so writing this I realize that this might be a database version problem. I'm using 9i! I'll try 10g and see what happens.
Message
BME-99003: An error occurred, so processing could not continue.
Cause
The application has tried to de-reference an invalid pointer. This exception should have been dealt with programmatically. The current activity may fail and the system may have been left in an unstable state. The following is a stack trace.
java.lang.NullPointerException
     at oracle.jdevimpl.xml.DescriptorNode.getWhitespaceHandler(DescriptorNode.java:349)
     at oracle.jdevimpl.xml.DescriptorNodeDomIO.load(DescriptorNodeDomIO.java:164)
     at oracle.jdeveloper.xml.BindingIO.load(BindingIO.java:43)
     at oracle.jdevimpl.xml.DescriptorNode.getNewDescriptorImpl(DescriptorNode.java:506)
     at oracle.jdevimpl.xml.DescriptorNode.getDescriptor(DescriptorNode.java:140)
     at oracle.jdeveloper.xml.oc4j.ejb.OrionEjbJarNode.getOrionEjbJar(OrionEjbJarNode.java:145)
     at oracle.jdeveloper.ejb.BaseEjbModuleContainer.getOrionEjbJar(BaseEjbModuleContainer.java:476)
     at oracle.jdeveloper.ejb.modeler.diagram.dropHandler.TableDropEJB21Handler.isAvailable(Unknown Source)
     at oracle.bm.diagrammer.ui.DropChooserPanel.populateOptions(Unknown Source)
     at oracle.bm.diagrammer.ui.DropChooserPanel.createComponents(Unknown Source)
     at oracle.bm.diagrammer.ui.DropChooserPanel.<init>(Unknown Source)
     at oracle.bm.diagrammer.dropHandler.AbstractChooserDropHandler.createPanel(Unknown Source)
     at oracle.bm.diagrammer.dropHandler.AbstractChooserDropHandler.processObjects(Unknown Source)
     at oracle.bm.addinUtil.IDEAppContext$4.performAction(Unknown Source)
     at oracle.bm.diagrammer.LockMonitor.performLockedAction(Unknown Source)
     at oracle.bm.diagrammer.BaseDiagram.performDiagramLockedAction(Unknown Source)
     at oracle.bm.addinUtil.IDEAppContext.dropNavigatorNodeLater(Unknown Source)
     at oracle.bm.addinUtil.IDEAppContext$5.run(Unknown Source)
     at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:461)
     at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
     at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)
Action
If further errors occur, you should restart the application.
Also, report the problem on the JDeveloper forum on otn.oracle.com, or contact Oracle support, giving the information from this message.
________________________________________________________________________________

Hi lisa, you've said that the problem does not occur in the 10.1.3 build but I have almost the same problem with the BME-99003 error message.
I used the same workaround "changing the regional settings from BE to US" and the BME-99003 problem disappears :-)
Here is the error message that I receive while I add a table into the EJBDiagram. I'm using
windows XP SP2
ADF Business Components     10.1.3.34.12
Java Platform     1.5.0_04
Oracle IDE     10.1.3.34.12
Struts Modeler Version     10.1.3.34.12
UML Modelers Version     10.1.3.34.12
Versioning Support     10.1.3.34.12
Abdelkrim BOUJRAF
Message
BME-99003: An error occurred, so processing could not continue.
Cause
The application has tried to de-reference an invalid pointer. This exception should have been dealt with programmatically. The current activity may fail and the system may have been left in an unstable state. The following is a stack trace.
java.lang.NullPointerException
at oracle.jdevimpl.xml.DescriptorNode.getWhitespaceHandler(DescriptorNode.java:349)
at oracle.jdevimpl.xml.DescriptorNodeDomIO.load(DescriptorNodeDomIO.java:164)
at oracle.jdeveloper.xml.BindingIO.load(BindingIO.java:43)
at oracle.jdevimpl.xml.DescriptorNode.getNewDescriptorImpl(DescriptorNode.java:506)
at oracle.jdevimpl.xml.DescriptorNode.getDescriptor(DescriptorNode.java:140)
at oracle.jdeveloper.xml.oc4j.ejb.OrionEjbJarNode.getOrionEjbJar(OrionEjbJarNode.java:145)
at oracle.jdeveloper.xml.oc4j.ejb.OrionEjbJarHelper.findOrionEjbJar(OrionEjbJarHelper.java:82)
at oracle.jdeveloper.xml.oc4j.ejb.OrionEjbJarHelper.findOrCreateOrionEjbJar(OrionEjbJarHelper.java:73)
at oracle.jdeveloper.ejb.modeler.diagram.dropHandler.TableDropEJBCommonHandler.processTableNodes(Unknown Source)
at oracle.jdeveloper.ejb.modeler.diagram.dropHandler.TableDropEJB21Handler.processTableNodes(Unknown Source)
at oracle.bm.typemodel.dropHandler.TableDropSubHandler.processDBObjectNodes(Unknown Source)
at oracle.bm.typemodel.dropHandler.DBObjectDropSubHandler.processObjects(Unknown Source)
at oracle.bm.diagrammer.dropHandler.AbstractChooserDropHandler.processObjectsImpl(Unknown Source)
at oracle.bm.diagrammer.dropHandler.AbstractChooserDropHandler.processObjects(Unknown Source)
at oracle.bm.addinUtil.IDEAppContext$4.performAction(Unknown Source)
at oracle.bm.diagrammer.LockMonitor.performLockedAction(Unknown Source)
at oracle.bm.diagrammer.BaseDiagram.performDiagramLockedAction(Unknown Source)
at oracle.bm.addinUtil.IDEAppContext.dropNavigatorNodeLater(Unknown Source)
at oracle.bm.addinUtil.IDEAppContext$5.run(Unknown Source)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:461)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)
Action
If further errors occur, you should restart the application.
Also, report the problem on the JDeveloper forum on otn.oracle.com, or contact Oracle support, giving the information from this message.

How drive ejb beans from such as COMPANY with..

I am very new to EJBs but would like to give a try and dooooooooooooo it of course. Now, I understnad how to write jave(ejb interfaces and classes) but makes me small is how define ejb beans from my bosses speach. He says we need to ....... so for example COMPANY(company name, contact, references + more) could be our business objects. HAH!
So pmy roblem is what should be an ejb bean and what should be ejb bean fields.
Thanks a lot in advance.
gapter

Its really not that difficult really. First - if you decide that your business object is going to be a Bean - Determine if it should be an EJB or just a regular Java Object bean in which case you'll probaly just use a Java Bean. The two are very similar with the exception that JB's are not Distributed but can do most of the grunge work that an EJB is suppose to do.
Next, determine what business methods or transactions are most likely to be done to your Business Object. This should determines the interface. So far that's all routine.
If you are decide that an EJB is what your problem demands (after much research into your problem) - then ask if your business object will be persistent (exist for a long time and will need storage (say on a persistent storage media like in a database) Or whether it will just require session scope (or just to be present the duration of a transaction/session - like say a shopping cart). The former requires a Entity Bean, the latter a Session Bean.
You then create your implementation code in a NameOfClassEJB class. A Container Management class NameOfClassHOME, and of course your Business Method Interface called NameOfClass.
The BMI (business method Interface class) is trivial. Your EJB class however will contain all the implementation required to get work done depending on the choice of Implementation - that is, whether you wish to handle all transactions (Bean Managed) or if you would rather delegate to the Container to handle Storage Issues (Container Managed). With Container Management - You get a lot for free - like concurrency control, database connectivity is trivial, distributed transaction management is trivial, field updates in your database is totally out of your hands. etc ...
For a beginner - its better if you take time to study the ejb lifecycle, the J2EE Business Architecture, then the solution that they proposed for application development. This is not trivial and has a steep learning curve.
Have fun.
Next determine if you want to handle all of the transactions between the properties (or fields) in the bean or you'd like the Application Server's Container to do this for you. (Most EJB's at least the simple ones are better off being handled by the Container).
going to be an employee: say with name, address, tel, email: Y

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How synchronize EJB diagram with database

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