public void addListener()

in fam/src/main/java/org/apache/commons/jci2/fam/monitor/FilesystemAlterationMonitor.java [75:91]

• 13 lines of code
• 2 McCabe index (conditional complexity)

    public void addListener( final File pRoot, final FilesystemAlterationListener pListener ) {

        FilesystemAlterationObserver observer;

        synchronized (observersLock) {
            observer = observers.get(pRoot);

            if (observer == null) {
                final Map<File, FilesystemAlterationObserver> newObservers = new HashMap<>(observers);
                observer = new FilesystemAlterationObserverImpl(pRoot);
                newObservers.put(pRoot, observer);
                observers = Collections.unmodifiableMap(newObservers);
            }
        }

        observer.addListener(pListener);
    }