eirikbakke opened a new pull request, #6049:
URL: https://github.com/apache/netbeans/pull/6049
As of NetBeans 18, the API method DatabaseConnection.showConnectionDialog no
longer works when called from the EDT. It now gives the following exception:
```
java.lang.Error: Cannot call invokeAndWait from the event dispatcher thread
at java.desktop/java.awt.EventQueue.invokeAndWait(EventQueue.java:1351)
at java.desktop/java.awt.EventQueue.invokeAndWait(EventQueue.java:1344)
at
java.desktop/javax.swing.SwingUtilities.invokeAndWait(SwingUtilities.java:1480)
at
org.netbeans.modules.db.explorer.action.ConnectAction$ConnectionDialogDisplayer.showDialog(ConnectAction.java:254)
at
org.netbeans.modules.db.explorer.DatabaseConnection$5.run(DatabaseConnection.java:1230)
at
org.netbeans.modules.openide.util.NbMutexEventProvider$Event.doEvent(NbMutexEventProvider.java:97)
at
org.netbeans.modules.openide.util.NbMutexEventProvider$Event.readAccess(NbMutexEventProvider.java:72)
at
org.netbeans.modules.openide.util.LazyMutexImplementation.readAccess(LazyMutexImplementation.java:66)
at org.openide.util.Mutex.readAccess(Mutex.java:242)
at
org.netbeans.modules.db.explorer.DatabaseConnection.showConnectionDialog(DatabaseConnection.java:1227)
at
org.netbeans.api.db.explorer.ConnectionManager.showConnectionDialog(ConnectionManager.java:343)
```
The problem is that invokeAndWait is not permitted to be called on the EDT.
The invokeAndWait call was introduced when ConnectAction was made asynchronous
in an [earlier commit](https://github.com/apache/netbeans/pull/5361).
The fix is to use "Mutex.EVENT.writeAccess((Mutex.Action) () -> { ... })"
instead of invokeAndWait, which works from either the EDT or not, but block in
either case until the operation has completed.
I'm not sure if this bug affects the NetBeans IDE; I found it in my NetBeans
Platform application (Ultorg, a database UI).
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