node.js - 使用云功能在 Google Cloud pub/sub 上发布只需 3 分钟 - NodeJS

Question

我正在做一个函数，它将在收到网络钩子(Hook)后发布事件的类型。 它正在工作，但它在函数启动后大约 3 分钟发布消息。 这个长时间的停顿来自于 const {PubSub} = require('@google-cloud/pubsub') 我怎样才能让它走得更快？谢谢!

源代码:

exports.Challenge = (req,res) => {
    var type = req.body['event']['type']   
    console.log(type)                       
    console.log("start pubsub msg function")
    msgpubsub(type)
    console.log("end pubsub msg function")
}

function msgpubsub(_type){
    const topicName = "NAME_OF_TOPIC"
    console.log(`publishing message to topic: ${topicName}`)

    console.log("start require('@google-cloud/pubsub")
    const {PubSub} = require('@google-cloud/pubsub')
    console.log("end require(@google-cloud/pubsub)")

    console.log("start new pubsub")
    const pubSubClient = new PubSub('ID');
    console.log("end newpubsub")
    
    const messageBuffer = Buffer.from(_type)
    console.log("message buffer : " + messageBuffer)

    try{
        pubSubClient.topic(topicName).publish(messageBuffer)
    } catch(err){
        console.error(err)
    }

logs

Answer 1

最好创建一次客户端，然后在收到事件时使用客户端发布消息。就像现在一样，您在每次事件中都会创建一个全新的客户，这是昂贵的。

const topicName = "NAME_OF_TOPIC"
const {PubSub} = require('@google-cloud/pubsub')
const pubSubClient = new PubSub('ID');
const topicPublisher = pubSubClient.topic(topicName);

exports.Challenge = (req,res) => {
    var type = req.body['event']['type']   
    console.log(type)                       
    console.log("start pubsub msg function")
    msgpubsub(type)
    console.log("end pubsub msg function")
}

function msgpubsub(_type){    
    const messageBuffer = Buffer.from(_type)
    console.log("message buffer : " + messageBuffer)

    try {
        var publishFuture = topicPublisher.publish(messageBuffer);
        publishFuture.get();
    } catch(err){
        console.error(err)
    }
}