[jbosstools-issues] [JBoss JIRA] Commented: (JBIDE-7317) Cloud Connection wizard: user input is block when entering a url
[
https://jira.jboss.org/browse/JBIDE-7317?page=com.atlassian.jira.plugin.s...
]
Andre Dietisheim commented on JBIDE-7317:
-----------------------------------------
analyzed the databinding code. Here's my current state of knowledge for documentation
purposes:
To my understanding updates are executed in their own thread:
I observer the url text field in delayed manner (Observable#observeDelayed(delay)).
Delayed observables trigger the update when the delay that was indicated is reached. A
Updater (runnable) that is triggered by a timer is used for that purpose:
- DelayedObservableValue#makeDirty:
scheduleUpdate()
- DelayedObservableValue#scheduleUpdate:
updater = new ValueUpdater(cachedValue);
getRealm().timerExec(delay, updater);
- Realm#timerExec:
timer.schedule(
new TimerTask() {
public void run() {
asyncExec(runnable);
}
}, milliseconds);
- Realm#asyncExec:
ensureWorkerThreadIsRunning();
workQueue.enqueue(runnable);
workQueue.notifyAll();
- Realm#ensureWorkerThreadIsRunning:
if (workerThread == null) {
workerThread = new Thread() {
public void run() {
try {
while (true) {
Runnable work = null;
synchronized (workQueue) {
while (workQueue.isEmpty()) {
workQueue.wait();
}
work = (Runnable) workQueue.dequeue();
}
syncExec(work);
}
} catch (InterruptedException e) {
// exit
}
}
};
workerThread.start();
}
}
Cloud Connection wizard: user input is block when entering a url
----------------------------------------------------------------
Key: JBIDE-7317
URL: https://jira.jboss.org/browse/JBIDE-7317
Project: Tools (JBoss Tools)
Issue Type: Bug
Components: deltacloud
Affects Versions: 3.2.0.Beta1
Reporter: Andre Dietisheim
Assignee: Andre Dietisheim
Fix For: 3.2.0.Beta2
If you try to create a new connection (Cloud Connection Wizard) and enter a URL, you may
come to a point where you cannot enter any new character. The UI is freezing.
The reason for this is that the wizard tries to connect to the given url and tries to
determine if a deltacloud instance may be reached there. This process blocks the UI. The
databinding that is used for this matter does checking in a background thread, but does
not do it in a proper way (#observeDelayed).
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