[英]Java Receiving CORBA Callback with Swing
I have a class that extends Swing JFrame. 我有一个扩展Swing JFrame的类。 In order for this class to receive a callback and call a method in this class, the class should extend the POA class.
为了使此类接收回调并在此类中调用方法,该类应扩展POA类。 I don't know how to do that.
我不知道该怎么做。 What about multiple inheritance?
多重继承呢? Should I make another class that extends the POA class?
我应该再做一个扩展POA类的类吗?
Code 码
public final class JFSECorbaClient extends javax.swing.JFrame {
//
// init and other method
//
public static void main(final String args[]) throws ClassNotFoundException, IllegalAccessException, InstantiationException{
java.awt.EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
frame = new JFSECorbaClient().setVisible(true);
try {
//initialize orb
Properties props = System.getProperties();
props.put("org.omg.CORBA.ORBInitialPort", "1050");
props.put("org.omg.CORBA.ORBInitialHost", "localhost");
ORB orb = ORB.init(args, props);
System.out.println("Initialized ORB");
//Instantiate Servant and create reference
POA rootPOA = POAHelper.narrow(
orb.resolve_initial_references("RootPOA"));
rootPOA.activate_object(this.frame); //this.frame should extends jfseCallbackPOA
ref = jfseCallbackHelper.narrow(
rootPOA.servant_to_reference(callbackListener));
//Resolve MessageServer
jfseServer = jfseORBHelper.narrow(
orb.string_to_object("corbaname:iiop:1.2@localhost:1050#MessageServer"));
//Activate rootpoa
rootPOA.the_POAManager().activate();
//thread for receive callback in other class thread
JFSECorrbaListener th = new JFSECorrbaListener();
th.setOrb(orb);
th.start();
} catch (Exception e) {
System.out.println(e);
}
}
});
}
It doesn't have to extend the POA class if you are in control of the IDL: you can define your callback via RMI/IIOP, generate the IDL from the remote interface when generating the stub (rmic -iiop), and use PortableRemoteObject.exportObject() to export it. 如果您控制着IDL,则不必扩展POA类:您可以通过RMI / IIOP定义回调,可以在生成存根(rmic -iiop)时从远程接口生成IDL,并使用PortableRemoteObject。 exportObject()导出它。 No need to extend any specific class.
无需扩展任何特定的类。
Having said all that, it's the wrong answer. 说了这么多,那是错误的答案。 Your JFrame-extending class has no need to also be a CORBA callback.
您的JFrame扩展类不必也为CORBA回调。 Define your CORBA callback as a completely separate class, and provide it with hooks into your JFrame-extending class to do whatever is required when the callback occurs.
将CORBA回调定义为完全独立的类,并为您的JFrame扩展类提供钩子,以执行发生回调时所需的任何操作。
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