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Java 9: Building Robust Modular Applications
book

Java 9: Building Robust Modular Applications

by Dr. Edward Lavieri, Peter Verhas, Jason Lee
April 2018
Intermediate to advanced content levelIntermediate to advanced
910 pages
33h 21m
English
Packt Publishing
Content preview from Java 9: Building Robust Modular Applications

Reacting to changes in preferences

Now that we can persist changes, we need to make the application react to the changes. Fortunately, the NetBeans RCP provides a neat, decoupled way to handle that. We need not explicitly call a method from our code here. We can attach a listener at the point in the system where we're interested in the change. We've already seen this code back in PhotoManagerImpl:

    prefs.addPreferenceChangeListener(evt -> { 
      if (evt.getKey().equals("sourceDirs")) { 
        setSourceDirs(evt.getNewValue()); 
        scanSourceDirs(); 
      } 
    }); 

When we save any preference for the PhotoManager module, this listener is called. We simply check to make sure it's for a key that we're interested in, and act accordingly, which, as we've seen, involves ...

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Publisher Resources

ISBN: 9781788832823Supplemental ContentOtherPurchase LinkErrata Page