E4 Preference Initializer won´t get called - eclipse

Question

I´m trying to migrate my e3-rcp-app to a e4-rcp-app.
Therefore I need to define my default Preferences. (Not the Pref.Pages)
And by doing and trying so, I just can´t get my Initializer called. Here Is my initializer-class:
public class MyPreferenceInitializer extends AbstractPreferenceInitializer {
public MyPreferenceInitializer (){}
#Override
public void initializeDefaultPreferences() {
Preferences defaults = DefaultScope.INSTANCE.getNode(InspectIT.ID);
// Set defaults using things like:
defaults.put("DUMMY", "DUMMYCONTENT");
try {
defaults.flush();
} catch (BackingStoreException e) {
e.printStackTrace();
}
//And this other approach to make sure that one of them works
IPreferenceStore store = InspectIT.getDefault().getPreferenceStore();
store.setDefault("DUMMY", "DUMMYCONTENT");
try {
((Preferences) store).flush();
} catch (BackingStoreException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//Dummy impl
default Preferences....,
}
}
I also got an Activator class with the following structure: (Just posting the relevant methods(?))
public class Activator implements BundleActivator {
private static BundleContext context;
static BundleContext getContext() {
return context;
}
private static Activator plugin;
private volatile ScopedPreferenceStore preferenceStore;
public void start(BundleContext context) throws Exception {
plugin = this;
Activator.context = context;
locateRuntimeDir();
logListener = new LogListener();
Platform.addLogListener(logListener);
//access to my initializor
String text = getPreferenceStore().getDefaultString("DUMMY");
String text2 = getPreferenceStore().getString("DUMMY");
}
public void stop(BundleContext context) throws Exception {
Activator.context = null;
plugin = null;
}
public static <E> E getService(Class<E> clazz) {
ServiceReference<E> reference = context.getServiceReference(clazz);
if (null != reference) {
return context.getService(reference);
}
throw new RuntimeException("Requested service of the class " + clazz.getName() + " is not registered in the bundle.");
}
public ScopedPreferenceStore getPreferenceStore() {
if (null == preferenceStore) {
synchronized (this) {
if (null == preferenceStore) {
preferenceStore = new ScopedPreferenceStore(ConfigurationScope.INSTANCE, ID);
}
}
}
return preferenceStore;
}
}
The ScopedPreferenceStore I´m using is the one available at: https://github.com/opcoach/e4Preferences/tree/master/com.opcoach.e4.preferences
As well, I declared the plugin.xml Extension like this (I do need this, right?)
...
<extension
point="org.eclipse.core.runtime.preferences">
<initializer class="MyApplication.rcp.preferences.MyPreferenceInitializer ">
</initializer>
</extension>
...
I´m using Eclipse 4.5.1 on a win7 x64
I googled a lot and found a lot of Threads concerning this, but I just can´t find my mistake =/.
Anyone got a suggestion for why my default preferences initializer won´t get called?
Thanks in advance

Answer 1

You must still use the org.eclipse.core.runtime.preferences extension point to define the preferences initializer.
<extension
point="org.eclipse.core.runtime.preferences">
<initializer
class="package.MyPreferenceInitializer">
</initializer>
</extension>
In the initializer use:
#Override
public void initializeDefaultPreferences()
{
Preferences defaults = DefaultScope.INSTANCE.getNode(Activator.ID);
// Set defaults using things like:
defaults.putInt("pref id", 0);
}

Answer 2

Finally I found a solution for this issue.
Accidentally got over this problem again and the mistake was in the Activator. I wrongly set the ID onto a wrong name. I reset it to my projects name and now it is working!
public ScopedPreferenceStore getPreferenceStore() {
if (null == preferenceStore) {
synchronized (this) {
if (null == preferenceStore)
preferenceStore = new ScopedPreferenceStore(ConfigurationScope.INSTANCE, ID);
}
}
return preferenceStore;
}
ID = Project-Name