Express-idempotency-redis-adapter NPM

Use Redis to store data related to the express idempotency middleware.

Redis adapter for express-idempotency

Allow the express-idempotency to store data in a Redis data store.

This is a Node.js module designed to work with Express, available through the NPM registry.

Features

Provides adapter to support Redis
Allows the use of time-to-live (TTL) indexes to manage data

Getting started

Install the dependency.

$ npm install express-idempotency-redis-adapter

Integrate the data adapter during the middleware initialization.

const idempotency = require("express-idempotency");
const RedisAdapter = require("express-idempotency-redis-adapter").default;

// New Redis Adapter that will be used by the idempotency middleware
const adapter = new RedisAdapter({
  connectionConfig: { url: "redis://localhost:6379" },
});

adapter.connect().catch((error) => {
  throw error;
});

// Add the idempotency middleware by specifying the use of the redis adapter
app.use(
  idempotency.idempotency({
    dataAdapter: adapter,
  })
);

The data adapter will take care of everything required to store data from the express idempotency middleware.

Options

You can optionally configure the data adapter by providing options during initialization.

Property	Mandatory	Default	Description
ttl	false	86400	Time to live, in seconds. It will remove a resource after a certain period of time. Default is 86400 (1 day)
connectionConfig	false		Node-Redis client configuration settings. See: https://github.com/redis/node-redis/blob/master/docs/client-configuration.md
connectionInstance	false		Existing instance of Node-Redis

Note: You can only pass either connectionConfig or connectionInstance

Redis configuration

The data adapter can manage connection itself by providing a Redis configuration. It will use the node-redis package.

You might want to manage connection externally by having a singleton client. In this case, you can provide an existing instance of node-redis to the data adapter.

Time-to-live (TTL)

The data adapter will create TTL indexes to purge data from collection after a certain period of time. By default, the ttl is 1 day but it is configurable.