Fallback

Introduction

The fallback strategy provides an interface to define a callback that will be executed if the decorated function fails. This strategy is useful when you want to provide a default value or behavior in the event of a failure. For example, you may want to return a cached value or a default value from a configuration file. The fallback strategy is also useful for providing a graceful degradation of functionality when a service is unavailable, although you should consider using the circuit breaker strategy for this purpose as it provides more control over the failure state.

Installation

npm i @forts/resilience4ts-fallback

Create and Configure a Fallback

import { Fallback } from '@forts/resilience4ts-fallback';

const fallback = Fallback.of('my-fallback', {
  fallbackAction: async () => {
    return "my fallback value";
  },
});

const result = await fallback.on(async () => {
  // do something
})();

Options