Using `org.apache.commons:commons-configuration2:2.1` my application
needs to know when a configuration file has been reloaded so that it can
update some things in the program. Apache Commons Configuration2 uses a
lot of strategies and factories, and usually that's great, but here it's
getting so complicated I can't figure out where I need to install a
listener.
The application has this:
configConfigurationBuilder = new
ReloadingFileBasedConfigurationBuilder<FileBasedConfiguration>(
PropertiesConfiguration.class)
.configure(new
Parameters().properties().setFile(getConfigFile()));
final PeriodicReloadingTrigger configReloadingTrigger = new
PeriodicReloadingTrigger(
configConfigurationBuilder.getReloadingController(), null, 1,
TimeUnit.MINUTES);
configReloadingTrigger.start();
Which of these various things can I install a listener on? I just want
to be notified when the configuration file is reloaded.
I notice that the `ReloadingDetector` interface has a
`reloadingPerformed()` method, and that sounds like what I want. But how
do I add my own `ReloadingDetector`? It seems like the
`ReloadingController` only keeps one `ReloadingDetector` around. Surely
I don't have to subclass `ReloadingDetector` and install a custom one,
would I? I'm not wanting to specialize the reloading detection, so
subclassing would not be appropriate --- I just want to be notified when
something happens. Besides, it's not obvious to me where I would even
hook into the `ReloadingFileBasedConfigurationBuilder` chain of events
where it uses some internal factor to create the detector.
So how can I easily get Apache Commons Configuration2 to notify me when
it reloads a configuration?
Garret
P.S Does no one monitor Stack Overflow? It is a real pain to subscribe
to this old-fashioned mailing list---a general one for all Apache
Commons, at that!---just to ask a technical question. Below is the
unanswered Stack Overflow question I posted.
http://stackoverflow.com/q/40917757/421049
If you were to answer this question on Stack Overflow it would help a
lot more people than simply replying on this obscure mailing list. Just
a suggestion.
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