public synchronized static JiveProperties getInstance() {
        if (instance == null) {
            JiveProperties props = new JiveProperties();
            props.init();
            instance = props;
        }
        return instance;
    }
Returns a singleton instance of JiveProperties.

@return an instance of JiveProperties.
xmppserver/src/main/java/org/jivesoftware/util/JiveProperties.java