@s1seven/nestjs-tools-async-local-storage
v0.2.2
Published
wrap node async local storage to store request context
Downloads
110
Keywords
Readme
Async Local Storage`
Installation
$ npm install --save @s1seven/nestjs-tools-async-local-storage
Usage
import assert from 'assert';
import { AsyncLocalStorage } from 'async_hooks';
// to provide type safety for the store map
declare module '@s1seven/nestjs-tools-async-local-storage' {
interface RequestContext {
type?: string;
}
interface ContextStoreProperties {
id: number;
username: string;
profilePicture: string;
name: string;
}
}
import { AsyncLocalStorageService } from '@s1seven/nestjs-tools-async-local-storage';
const service = new AsyncLocalStorageService(new AsyncLocalStorage());
assert.throws(() => service.store.set('id', 1), new TypeError("Cannot read properties of undefined (reading 'set')"));
assert.throws(() => service.set('id', 1), new Error("Store is not initialized. Call 'enterWith' or 'run' first."));
service.enterWith(new Map());
// access store map directly
service.store.set('id', 1);
const id = service.store.get('id');
assert(typeof id === 'number');
// access store map via service which extends Map
service.set('username', 'john');
assert(typeof service.get('username') === 'string');
service.requestContext = { type: 'http' };
const requestContext = service.requestContext;
assert(typeof requestContext.type === 'string');
service.delete('username');