Created
March 1, 2017 09:11
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import { Observable } from '../../../../projects/demo-portal-angular/src/main/storefront-spa-webapp/node_modules/rxjs/Observable'; | |
class CacheApi { | |
private cachedStream: Observable; | |
protected cached: boolean = false; | |
public setCache(stream: Observable<any>) { | |
this.cachedStream = stream.share(); | |
this.cached = true; | |
} | |
public getCache(): Observable<any> { | |
return this.cachedStream; | |
} | |
public get cached(): boolean { | |
return this.cached; | |
} | |
} | |
const cacheMap = new WeakMap(); | |
export function cache(TTL = 1000 * 60 * 10): Function { | |
return function (target: any, propertyKey: any, descriptor: any) { | |
setTimeout(() => { | |
cacheMap.delete(property); | |
}, TTL); | |
return _.memoize(target[property]); | |
} | |
} | |
class Api { | |
@cache() | |
fetchOrders(): Observable<number> { | |
return Observable.of(1); | |
} | |
} | |
class Api2 extends CacheApi { | |
constructor() { | |
super(this); | |
} | |
fetchOrders(): Observable<number> { | |
if (!this.cached) { | |
let stream = Observable.of(1); | |
this.setCache(stream); | |
} | |
return this.getCache(); | |
} | |
} |
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