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RetryPromise.js
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| function retryPromise(promiseFunc, args, retryTimes) { | |
| const max = retryTimes; | |
| let result; | |
| const retry = (promiseFunc, args, retryTimes) => new Promise((resolve, reject) => { | |
| if (retryTimes <= 0) { | |
| const message = `${promiseFunc.name} : ${max} times failed...`; | |
| console.log(message); | |
| reject(new Error(message)); return; | |
| } | |
| return promiseFunc.apply(null, args).then(r => { | |
| console.log(`${promiseFunc.name} : ${max - retryTimes + 1} times success!`) | |
| result = r; | |
| return resolve(result) | |
| }).catch(e => { | |
| return retry(promiseFunc, args, --retryTimes).then(r => resolve(r)) | |
| }).catch(err => { | |
| reject(err); | |
| }); | |
| }); | |
| return retry(promiseFunc, args, retryTimes); | |
| } | |
| function test(param) { | |
| return new Promise((resolve, reject) => { | |
| console.log(param); | |
| if (Math.random()*100 > 90) | |
| resolve("test is succeed.") | |
| else | |
| reject("err"); | |
| }); | |
| } | |
| retryPromise(test, ["keep going!!"], 10) | |
| .then(r => console.log("success : ", r)) | |
| .catch(e => console.log("finally fail : ", e)); |
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