Created
January 3, 2018 13:38
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import _ from 'underscore'; | |
export default class HoldList { | |
constructor() { | |
this.holdList = []; | |
this.runningRequestCnt = 0; | |
} | |
invokeAll(err, exclude) { | |
if (this.holdList && this.holdList.length > 0) { | |
for (const unresolvedObj of this.holdList) { | |
if (unresolvedObj) { | |
const { | |
resolve, | |
reject, | |
path, | |
// timestampStarted, | |
} = unresolvedObj; | |
if (err && reject) { | |
// console.log(`request: ${path} waited for ${ | |
// round(now() - timestampStarted, 1)}ms and got rejected`); | |
reject(err); | |
} else if (err == null && resolve) { | |
if (exclude && path === exclude) { | |
// console.log(`request: ${path} waited for ${ | |
// round(now() - timestampStarted, 1)}ms and then got RESOLVED`); | |
resolve(false); | |
} else { | |
resolve(true); | |
} | |
} | |
} | |
} | |
this.holdList = []; | |
} | |
} | |
createUnresolvedPromise(path, timestampStarted) { | |
const self = this; | |
return new Promise((resolve, reject) => { | |
if (self.holdList == null) { | |
self.holdList = []; | |
} | |
self.holdList.push({ | |
resolve, | |
reject, | |
path, | |
timestampStarted, | |
}); | |
}); | |
} | |
removePromise(promise) { | |
if (this.holdList && this.holdList.length > 0) { | |
// remove it's reference from the Req Promise array | |
this.holdList = _.reject(this.holdList, | |
curPromise => curPromise === promise, | |
); | |
} | |
} | |
getWaitingRequestCnt() { | |
return this.holdList && this.holdList.length; | |
} | |
increaseRunningRequestCnter() { | |
this.runningRequestCnt += 1; | |
} | |
decreaseRunningRequestCnter() { | |
if (this.runningRequestCnt > 0) { | |
this.runningRequestCnt -= 1; | |
if (this.runningRequestCnt === 0) { | |
this.invokeAll(); | |
} | |
} | |
} | |
getRunningRequestCnt() { | |
return this.runningRequestCnt; | |
} | |
} |
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