feat: ignore event whose modify time is out of date

[24kpure]

fix #334

[24kpure]

@spencergibb Review,please.

[24kpure]

?

[spencergibb]

Please add a test so we can prevent regressions in the future.

[spencergibb]

What is "out of date"?

[24kpure]

Every exist node in zookeeper will trigger a add event. Maybe we can ignore these add event for we have get all data when start up. That's my test:

    @Override
    public void childEvent(CuratorFramework client, TreeCacheEvent event)
            throws Exception {
        TreeCacheEvent.Type eventType = event.getType();
        if (eventType != NODE_ADDED && eventType != NODE_REMOVED
                && eventType != NODE_UPDATED) {
            return;
        }

        String path = event.getData().getPath();
        long currentTime = System.currentTimeMillis();
        long validTime = currentTime - TimeUnit.MINUTES.toMillis(1);
        if (eventType == NODE_ADDED
                && event.getData().getStat().getMtime() < validTime) {
            log.info("currentTime:{},dataModifyTime:{},difference:{} second", currentTime, event.getData().getStat().getMtime(),
                    (currentTime - event.getData().getStat().getMtime()) / 1000);
            return;
        }
}

And loginfo is below

currentTime:1737443876150,dataModifyTime:1709799075357,difference:27644800 second
currentTime:1737443876152,dataModifyTime:1701227490791,difference:36216385 second
currentTime:1737443876153,dataModifyTime:1672281805849,difference:65162070 second
currentTime:1737443876154,dataModifyTime:1734484683314,difference:2959192 second
currentTime:1737443876154,dataModifyTime:1734404672179,difference:3039203 second
currentTime:1737443876155,dataModifyTime:1733982210881,difference:3461665 second

[spencergibb]

This should be configurable. Can you say why you chose 1 minute as the definition of out of date?