@Override
    public void processReply(Reply reply) {
        super.processReply(reply);
        if ( ! reply.hasErrors()) {
            ++numOk;
        }
    }
Constructs a new instance of this class using the given clock to calculate efficiency.

@param timer the timer to use
messagebus/src/main/java/com/yahoo/messagebus/DynamicThrottlePolicy.java