[OPTIMIZATION] record pre putMessageDistributeTime

[hujie6]

version:
rocketmq 4.8.0
rocketmq-exporter

Q: when i use rocketmq exporter to collect rocketmq cluster metrics（collection period is one minute）, i find that the putMessageDistributeTime of broker is not correct by calling fetchBrokerRuntimeStats. And then i reviewed StoreStatsService, putMessageDistributeTime could be initialized every minute when calling printTps method. if exporter's collection time is different from StoreStatsService printTps time, user will get incorrect putMessageDistributeTime.

how to fix:
we should record old putMessageDistributeTime when init putMessageDistributeTime every time. when calling fetchBrokerRuntimeStats to get putMessageDistributeTime, we should return the old putMessageDistributeTime.

[hujie6]

I had optimized it, and i got correct putMessageDistributeTime. maybe i can submit a pull request if possible

[ShadowySpirits]

PR is welcome! And we introduce new metrics for RocketMQ, see RIP-46 and Spec please.

[lizhimins]

Nice

[hujie6]

PR is welcome! And we introduce new metrics for RocketMQ, see RIP-46 and Spec please.

i find rocketmq 5.0 had fixed this bug. this issue can be closed