Created
June 1, 2021 10:56
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| import 'reflect-metadata'; | |
| const RUNNING = Symbol("RUNNING"); | |
| export function NoOverlap(): MethodDecorator { | |
| return function (target, key?, descriptor?:TypedPropertyDescriptor<any>) { | |
| const origFn = descriptor.value; | |
| if (!Reflect.hasMetadata(RUNNING, target, key)) { | |
| Reflect.defineMetadata(RUNNING, false, target, key); | |
| } | |
| descriptor.value = async function(...args) { | |
| const isRunning = Reflect.getMetadata(RUNNING, target, key); | |
| if (isRunning) { | |
| return; | |
| } | |
| Reflect.defineMetadata(RUNNING, true, target, key); | |
| let err; | |
| let result; | |
| try { | |
| result = await origFn.bind(this)(...args); | |
| } catch (e) { | |
| err = e; | |
| } | |
| Reflect.defineMetadata(RUNNING, false, target, key); | |
| if (err) { | |
| throw err; | |
| } | |
| return result; | |
| } | |
| } | |
| } |
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