以固定速率处理消息
问题
您希望以固定速率处理消息，忽略那些到达速度过快的消息。例如，您有一个传感器每秒发送一次数据，但您只想每5秒处理一次更新。您处理的消息必须是最新的。
解决方案
使用配置为速率限制通过其的消息的Delay节点，并启用丢弃中间消息的选项。
示例
[{"id":"8a1bcd7d.f6b67","type":"inject","z":"ac14500e.2c57d","name":"Inject Array","topic":"","payload":"[0,1,2,3,4,5,6,7,8,9]","payloadType":"json","repeat":"","crontab":"","once":false,"onceDelay":0.1,"x":110,"y":1380,"wires":[["bd4bdd42.bd1b"]]},{"id":"bd4bdd42.bd1b","type":"delay","z":"ac14500e.2c57d","name":"","pauseType":"rate","timeout":"5","timeoutUnits":"seconds","rate":"1","nbRateUnits":"5","rateUnits":"second","randomFirst":"1","randomLast":"5","randomUnits":"seconds","drop":true,"x":320,"y":1380,"wires":[["be20c513.237c78"]]},{"id":"be20c513.237c78","type":"debug","z":"ac14500e.2c57d","name":"Debug","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","x":510,"y":1380,"wires":[]}]
讨论
Delay节点的速率限制模式可用于更改通过其的消息速率。启用丢弃中间消息的选项后，它将丢弃在速率限制间隔内到达的任何消息。
