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= How to execute a long running task from an action without blocking the GUI?
:page-layout: wikidev
:page-tags: wiki, devfaq, needsreview
:jbake-status: published
:keywords: Apache NetBeans wiki DevFaqTaskLongRunningAsyncTask
:description: Apache NetBeans wiki DevFaqTaskLongRunningAsyncTask
:toc: left
:toc-title:
:page-syntax: true
:page-wikidevsection: _tasks_and_progressbar
:page-position: 3
The easy way if you might need to run a long task when some action is involved:
[source,java]
----
@ActionRegistration(asynchronous = true)
...
public void actionPerformed(ActionEvent ev) {
if (isLongTaskRequired) {
// maybe run a ProgressHandler
doLongTask();
}
EventQueue.invokeLater(new Runnable() {
@Override public void run() {
// do domething with the gui
}
});
}
----
This way you don't even need to care about threading yourself, GUI will be updated as long as the task is finished.
Taken from dev@platform.netbeans.org (Oct 2013)