How to Create a Swing CRUD Application on NetBeans Platform 6.8

Excellent feedback, ringerc. That will be fixed. Thank you. One approach is to register actions in the layer file which then enables you to add an attribute to the layer entry. That attribute causes the action to be processed asynchronously, (which is a new feature in 6.8, i.e., the ability to mark an action as being asynchronous). These asynchronous actions can simulate SwingWorker:

class MyAction implements ActionListener, Runnable {
  public MyAction(MyContext c) {
    assert EventQueue.isEventThread();
    // setup inside AWT thread, get what is important from c
  }
  public void actionPerformed(AE ev) {
    assert !EventQueue.isEventThread();
    // run off AWT thread
    // perform the work
    SwingUtilities.invokeLater(this);
  }

  public void run() {
    assert EventQueue.isEventThread();
    // finish in AWT and update the UI
  }
}

Another approach would be to use SwingWorker. These approaches will be added to the article, though note that threading on the NetBeans Platform is also discussed here: http://wiki.netbeans.org/NetBeansDeveloperFAQ#Threading

Something else that's possible is to integrate with the NetBeans progress bar, which can be achieved with, literally, 3 lines of code.

Hi Geertjan,

great to have another tutorial about this topic. Thanks!

Though I haven't read all of it yet, I already have one enhancement question:

As you know, the NetBeans IDE provides a project template to create the skeleton of a CRUD application based on the Swing Application Framework.

Maybe it would be useful to have a project template  to create the skeleton of a CRUD application based on the NetBeans Platform, too. What do you think?

-Florian

Hi surajchchetry, that's a great idea. If I understand it correctly. This is the kind of project structure I am creating at the moment, for a new tutorial, based on your suggestion above.

A new tutorial should appear within the next week or two, to explain how to create project structures like the above, with a bunch of additional features too, as described here in my blog!

Hi Geertjan,

thanks for this super tutorial - it helped me a lot.

I still have a problem with saving the customer. The save button works as I expect, but the save action is not invoked during closing the TopComponent and switching between customers. After few hours of googling I have no Idea how to do it using SaveCookie and SaveCookieImpl model. Is there a possibility, to manually invoke the same save action as the save button? It would be good to invoke this save action in componentClosed() and resultChanged() methods.

Thank you very much

Vladimír Duša

Hi Geertjan,

thank's for this tutorial. It's a very good start for developing  Rcp and Database-Applikations.

I have two questions:

1. If i close  "Customer Window" the content of "Editor Window" isn't clear, wy??? or what should i do?

I think if a TComponent is closed  the Lookup of is is not longer in the Global Context and not displayed in

the "Editor Windows" ????

2. The save-button is enabled if i mouseClicked in  "Editor Window". Enabling if changed content of the

form  is better in this sample.

Thank you

 Andreas

@gcameo: I'm not the smartest developer around, nor the strongest JPA expert, but my personal advice after recent experience trying to use JPA in a Swing app is: run, run, as fast as you can.

You'll have to write a midlayer to mediate between Swing and your JPA data access to get acceptable performance, avoid blocking the UI, etc. Even then it'll be "interesting" to manage JPA session lifetimes. I'm currently seriously considering ripping JPA out of my app entirely and going back to JDBC, because I'm finding it creates more problems than it solves in a 2-tier Swing app.

I'd be glad to be proved wrong, of course. Just so long as that "wrong" doesn't involve some comment about how you should "obviously" write a 3-teir appserver based monstrosity that communicates with the Swing rich client via RMI. I don't have an army of bored coders who need make-work, I need to get a real application written ;-)

I have direct personal messages enabled, and my email address is:

python -c "print 'Y3JhaWdAcG9zdG5ld3NwYXBlcnMuY29tLmF1\n'.decode('base-64')"

I don't seem to get email comment reply notifications, though.

my program still refuses to build the customerlibrary to a jar file,i get these errors onh the console window,

init:
deps-clean:
Updating property file: C:\CustomerLibrary\build\built-clean.properties
Deleting directory C:\CustomerLibrary\build
clean:
init:
deps-jar:
Created dir: C:\CustomerLibrary\build
Updating property file: C:\CustomerLibrary\build\built-jar.properties
Created dir: C:\CustomerLibrary\build\classes
Created dir: C:\CustomerLibrary\build\classes\META-INF
Copying 1 file to C:\CustomerLibrary\build\classes\META-INF
Created dir: C:\CustomerLibrary\build\empty
Created dir: C:\CustomerLibrary\build\generated-sources\ap-source-output
Compiling 2 source files to C:\CustomerLibrary\build\classes
Note: Creating non-static metadata factory ...


An annotation processor threw an uncaught exception.
Consult the following stack trace for details.
java.lang.NoSuchMethodError: javax.annotation.processing.RoundEnvironment.getRootElements()Ljava/util/Set;
    at org.eclipse.persistence.internal.jpa.modelgen.MetadataMirrorFactory.setEnvironments(MetadataMirrorFactory.java:297)
    at org.eclipse.persistence.internal.jpa.modelgen.CanonicalModelProcessor.process(CanonicalModelProcessor.java:368)
    at com.sun.tools.javac.processing.JavacProcessingEnvironment.callProcessor(JavacProcessingEnvironment.java:634)
    at com.sun.tools.javac.processing.JavacProcessingEnvironment.discoverAndRunProcs(JavacProcessingEnvironment.java:565)
    at com.sun.tools.javac.processing.JavacProcessingEnvironment.doProcessing(JavacProcessingEnvironment.java:704)
    at com.sun.tools.javac.main.JavaCompiler.processAnnotations(JavaCompiler.java:913)
    at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:659)
    at com.sun.tools.javac.main.Main.compile(Main.java:327)
    at com.sun.tools.javac.main.Main.compile(Main.java:253)
    at com.sun.tools.javac.main.Main.compile(Main.java:244)
    at com.sun.tools.javac.Main.compile(Main.java:69)
    at com.sun.tools.javac.Main.main(Main.java:54)
C:\CustomerLibrary\nbproject\build-impl.xml:603: The following error occurred while executing this line:
C:\CustomerLibrary\nbproject\build-impl.xml:245: Compile failed; see the compiler error output for details.
BUILD FAILED (total time: 7 seconds)

please help with these, because of this i can continue the rest of the tutorial

http://platform.netbeans.org/tutorials/nbm-crud.html