@travetto/cache

travetto: Cache

Install: primary

$ npm install @travetto/cache

Provides a simple wrapper around lru-cache to provide standard caching constructs.

@Cacheable is a decorator that allows caching at class methods. The decorator will rewrite the method to cache on successful results. The decorator supports synchronous as well as asynchronous methods.

Code: Using decorators to cache expensive async call

  class Worker {
    
    @Cacheable({ max: 1000 })
    async calculateExpensiveResult(expression: string) {
      const value = await request(`https://google.com?q=${expression}`);
      return value;
    }
  }

The @Cacheable decorator supports certain configurations:

• name the name of the cache space
• dispose the function to invoke on cache eviction
• keyFn the function used to determine the cache key, defaults to all params serialized to a string
• max the maximum number of elements that the cache will hold before eviction
• maxAge the longest time an element is allowed to live before eviction. Defaults to infinite.