Console.execute() is an infinite loop:
public void execute(String [] argv) {
Main m = new Main();
m.initialize(argv, m_rete);
m_panel.setFocus();
while (true)
m.execute(m_doEcho);
}
This means that whatever thread calls it will never return (well,
unless a java.lang.Error is thrown.) You're calling it from the GUI
event-handling thread, which is obviously bad -- once you call it, the
GUI can't respond to any more events.
There are a couple different things you could do. First of all, you
need to doing the actual running of the engine on a dedicated
thread. Second, rather than creating a new Console and then destroying
it, you could simply hide it when it's not needed. So, you might change
your event handler to look something like this:
// This is now a member variable, not a local
Console c;
...
case JESS_PROMPT:
if (c == null) {
c = new Console("Agent - Jess engine", m_rete, true);
c.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent event) {
c.setVisible(false);
}
});
String[] argv = new String[0];
new Thread(new Runnable() {
public void run() {
c.execute(argv);
}
}.start();
}
c.setVisible(true);
break;
I think Sander Faas wrote:
[Charset iso-8859-1 unsupported, filtering to ASCII...]
> Hello,
>
> My agent has a Rete engine (m_rete) that I wish to access through a Console.
> Therefore the agent's GUI has a menubar with an item "Jess prompt". The
> eventhandler for this item contains the following code in the switch
> statement:
>
> case JESS_PROMPT:
> final Console c = new Console("Agent - Jess engine", m_rete, true);
> c.addWindowListener(new WindowAdapter()
> {
> public void windowClosing(WindowEvent event)
> {
> c.setVisible(false);
> c.dispose();
> }
> });
> String[] argv = new String[0];
> c.execute(argv);
> break;
>
> This works fine, but after I have closed the console window, I am unable to
> open it again. Furthermore it seems as if my GUI refuses to handle any
> events (for example from other items in the menubar) after using the
> console. Does anyone have a clue to the cause of this problem? Is something
> wrong with the code above?
>
> Greetings,
> Sander
>
>
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Ernest Friedman-Hill
Distributed Systems Research Phone: (925) 294-2154
Sandia National Labs FAX: (925) 294-2234
Org. 8920, MS 9012 [EMAIL PROTECTED]
PO Box 969 http://herzberg.ca.sandia.gov
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