Jive代码中AuthorizationFactory类

......
private static String className =
        "com.jivesoftware.forum.database.DbAuthorizationFactory";
private static void loadAuthorizationFactory() {
        if (factory == null) {
            //Use className as a convenient object to get a lock on.
            synchronized(className) {
                if (factory == null) {
                    //See if the classname has been set as a Jive property.
                    String classNameProp = JiveGlobals.getJiveProperty(
                            "AuthorizationFactory.className");
                    if (classNameProp != null) {
                        className = classNameProp;
                    }
                    try {
                        Class c = Class.forName(className);
                        factory = (AuthorizationFactory)c.newInstance();
                    }
                    catch (Exception e) {
                        System.err.println("Exception loading class: " + e);
                        e.printStackTrace();
                    }
                }
            }
        }
    }
......
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