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CLDR-16900 Limit frequency of announce and completion requests (#3583)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| /* | ||
| * cldrSchedule: for Survey Tool scheduling of http requests. | ||
| */ | ||
|
|
||
| export class FetchSchedule { | ||
| /** | ||
| * Construct a new FetchSchedule object | ||
| * | ||
| * @param {String} description description or name of caller | ||
| * @param {Number} refreshSeconds postpone requests until this many seconds have elapsed since last request/response | ||
| * @param {Boolean} debug whether to log debugging info to console | ||
| * @returns the new FetchSchedule object | ||
| */ | ||
| constructor(description, refreshSeconds, debug) { | ||
| this.description = description; | ||
| this.refreshMillis = refreshSeconds * 1000; | ||
| this.debug = debug; | ||
| this.lastRequestTime = this.lastResponseTime = 0; | ||
| } | ||
|
|
||
| setRequestTime() { | ||
| this.lastRequestTime = Date.now(); | ||
| if (this.debug) { | ||
| console.log( | ||
| this.description + " set lastRequestTime = " + this.lastRequestTime | ||
| ); | ||
| } | ||
| } | ||
|
|
||
| setResponseTime() { | ||
| this.lastResponseTime = Date.now(); | ||
| if (this.debug) { | ||
| console.log( | ||
| this.description + " set lastResponseTime = " + this.lastResponseTime | ||
| ); | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Is it too soon to make a request? | ||
| * | ||
| * @returns true if it is too soon, else false | ||
| */ | ||
| tooSoon() { | ||
| const now = Date.now(); | ||
| if ( | ||
| now < this.lastResponseTime + this.refreshMillis || | ||
| now < this.lastRequestTime + this.refreshMillis | ||
| ) { | ||
| if (this.debug) { | ||
| console.log( | ||
| this.description + | ||
| " postponing request: less than " + | ||
| this.refreshMillis / 1000 + | ||
| " seconds elapsed; now = " + | ||
| now | ||
| ); | ||
| } | ||
| return true; | ||
| } else { | ||
| if (this.debug) { | ||
| console.log(this.description + " will make a request; now = " + now); | ||
| } | ||
| return false; | ||
| } | ||
| } | ||
| } |