[英]What is the difference between async.waterfall and async.series
[英]Calling async.waterfall within async.series function not executing async.series callback function
我想在異步系列函數中調用使用異步瀑布函數。 看起來好像執行了並行函數,但似乎未執行異步序列的最終回調函數。 我得到了該函數實例的結果,該函數在系列函數中用不同的參數調用,但由於某種原因無法執行該行。
➜ lib git:(jumpstart-compare) ✗ node aws-ecs.compare.js
Data 1f701a9754eb22ce8f0dcdb4c1b0b366a51ade9a
Data 4cc27bcc2a8482478ac2e5c0cf3ac1babe153374
var AWS = require('aws-sdk');
const async = require('async')
const _ = require('lodash');
AWS.config.update({
region: 'us-east-1'
});
const ecs = new AWS.ECS();
getClusterSha = (clustername,app,callback) => {
const ListServices = (callback) => {
let params = {
cluster: clustername
}
//console.log('list tasks executed')
ecs.listServices(params, (err, data) => {
if (err) {
callback(err)
} else {
let dataObj = {
data: data,
cluster: clustername
}
callback(null,dataObj)
}
})
}
const getService = (arg1, callback) => {
let appname = app
arg1.cluster
let finaldata = arg1.data.serviceArns.filter((elem)=>{
if(elem.indexOf(appname) != -1){
return elem
}
});
//console.log('finaldata: ',finaldata)
if(finaldata.length > 0){
callback(null,finaldata.toString().split('/')[1])
}else{
callback('No app with name: '+appname+' found!')
}
}
const describeService = (arg2, callback) => {
let params = {
services: [arg2],
cluster: clustername
}
ecs.describeServices(params, (err, data) => {
if (err) {
callback(err)
} else {
// console.log(data)
callback(null,data.services[0].taskDefinition.split('/')[1])
}
})
}
const describeTaskDef = (arg3, callback) => {
let params = {
taskDefinition: arg3
}
ecs.describeTaskDefinition(params, (err, data) => {
if (err) {
callback(err)
} else {
//console.log(data.taskDefinition.containerDefinitions[0].image.split('/')[1].split(':')[1])
finaldata = data.taskDefinition.containerDefinitions[0]
.image.split('/')[1]
.split(':')[1]
callback(null,finaldata)
}
})
}
// const githubCall = (arg4,callback) => {
// console.log('https://github.com/Jumpstart-Auto'+'/'+app+'/commit/'+arg4)
// callback(null,'https://github.com/Jumpstart-Auto'+'/'+app+'/commit/'+arg4)
// }
async.waterfall([
ListServices,
getService,
describeService,
describeTaskDef,
], (err, data) => {
if (err) {
console.log('Error', err)
callback(err)
} else {
console.log('Data', data)
callback(null,data)
}
})
}
compareSha = (clustername1,clustername2,app) => {
async.series([
getClusterSha(clustername1,app,(data)=>{return data}),
getClusterSha(clustername2,app,(data)=>{return data})
], (err,result)=>{
console.log(err,result)
})
}
compareSha('dev','staging','jamobot',function(err,data){
console.log(data)
})
//module.exports = getShaCluster
將async.series更改為以下內容可解決此問題。
async.waterfall([
ListServices,
getService,
describeService,
describeTaskDef,
], (err, data) => {
if (err) {
console.log('Error', err)
callback(err)
} else {
console.log('Data', data)
callback(null,data)
}
})
}
compareSha = (clustername1,clustername2,app,cb) => {
async.series([
function(callback){
getClusterSha(clustername1,app,callback)
},
function(callback){
getClusterSha(clustername2,app,callback)
},
], (err,result)=>{
if(err){
cb(err)
}else{
cb(null,result)
}
})
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