long delayTime = lastValue + delayMillisBeforeProcessing - currentTime;
                while (delayTime > 0) {
                    lastTime.wait(delayTime);
                    currentTime = SystemUtil.currentTimeMillis();
                    delayTime = lastTime.get() + delayMillisBeforeProcessing - currentTime;
                }
                lastTime.set(currentTime);

        return delayMillisBeforeProcessing;
    }

    /**
     * Sets the delay in milliseconds before processing a URL.
     * @param delayMillisBeforeProcessing delay in milliseconds
     */
    public void setDelayMillisBeforeProcessing(final long delayMillisBeforeProcessing) {
        this.delayMillisBeforeProcessing = delayMillisBeforeProcessing;
    }

    /**

        for (int i = 0; i < numTasks; i++) {
            q.setUrl("http://example.com");
        }

        final HostIntervalController controller = new HostIntervalController();
        controller.delayMillisBeforeProcessing = waittime;
        controller.delayMillisAfterProcessing = 0L;
        controller.delayMillisForWaitingNewUrl = 0L;
        controller.delayMillisAtNoUrlInQueue = 0L;

        return delayMillisBeforeProcessing;
    }

    /**
     * Sets the delay time in milliseconds before processing a URL.
     *
     * @param delayMillisBeforeProcessing the delay time in milliseconds before processing
     */
    public void setDelayMillisBeforeProcessing(final long delayMillisBeforeProcessing) {
        this.delayMillisBeforeProcessing = delayMillisBeforeProcessing;
    }

    /**

        final Map<String, Long> params = new HashMap<>();
        params.put("delayMillisAfterProcessing", 100L);
        params.put("delayMillisAtNoUrlInQueue", 200L);
        params.put("delayMillisBeforeProcessing", 300L);
        params.put("delayMillisForWaitingNewUrl", 400L);

        final DefaultIntervalController controller = new DefaultIntervalController(params);