How to inject objects of custom classes (in eclipse e4) into an Handler class (defined for a menu item in Application's XMI file) - eclipse

Question

I'm new to Eclipse e4 and I am trying to inject an object of my custom class into a Handler class like below :
public class MenuHandler {
#Inject
Test2 user;
#Execute
public void execute(MApplication app, EPartService partService, EModelService modelService) {
System.out.println(user.getUserName()); // DefaultUser
user.setUserName("anotherUser");
System.out.println(user.getUserName()); //anotherUser
}
}
#Creatable
public class Test2 {
private String userName = "DefaultUser";
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
}
Having this code and If I launch my RCP application, and upon clicking the menu item (defined in the 'Application.e4xmi' file) my handler class ('MenuHandler') is not getting executed. Whereas if I remove the #Inject annotation from the handler class (i.e.., upon removing #Inject Test2 user; ) then the handler class is getting executed without any issues.
I think some problem exists if I have the annotation "#Inject" inside the Handler class.
Any suggestion will be greatly appreciated !

Answer 1

Maybe you should try to create and inject your custom object in the LifeCycleManager of your e4 application.
public class LifeCycleManager {
#PostContextCreate
public void postContextCreate(IEclipseContext context) {
final MCustomContext customContext = PersistenceUtils.load(MCustomContext.class);
context.set(MCustomContext.class, customContext);
}
}
This works fine for me.