Egg-cache-9 NPM

egg-cache-9

The plugin implements an easy-to-use caching function based on node-cache-9, which supports caching data into memory and caching data to redis.

中文说明

Install

$ npm i egg-cache-9 --save

Usage

// {app_root}/config/plugin.js
exports.cache9 = {
  enable: true,
  package: 'egg-cache-9',
};

// {app_root}/config/config.default.js
exports.cache9 = {
  client: {
    class: 'memory',
    ttl: 300,
  }
};


// {app_root}/app/****.js
const cache = app.cache9;

//  get data from a data source or cache
let data = await cache.get('key', async ()=>{ /* get data from data source and return it */ });
cache.renew('key'); // update expiration time
await cache.clear('key'); // clear cache

// get a lot of datas from a data source or cache
let {list, json} = await cache.getM('key', ids, obj=>obj.id, async (lst)=>{ /* get data from data source and return it */ });
cache.renewM('key', ids); // update expiration time
await cache.clearM('key', ids); //clear cache
await cache.clearM('key'); //clear cache

// {app_root}/config/config.default.js
exports.cache9 = {
  default: {
    ttl: 300,
  },
  clients: {
    cacheA: {
      class: 'memory',
    },
    cacheB: {
      class: 'redis',
      rds: { host: '127.0.0.1' }
    }
  }
};


// {app_root}/app/****.js
const cacheA = app.cache9.get('cacheA');
const cacheB = app.cache9.get('cacheB');

// get data from a data source or cache
let data = await cacheA.get('key', async ()=>{ /* get data from data source and return it */ });
cacheA.renew('key'); // update expiration time
await cacheA.clear('key'); //clear cache

// get a lot of datas from a data source or cache
let {list, json} = await cacheB.getM('key', ids, obj=>obj.id, async (lst)=>{ /* get data from data source and return it */ });
cacheB.renewM('key', ids); // update expiration time
await cacheB.clearM('key', ids); //clear cache
await cacheB.clearM('key'); //clear cache

see node-cache-9 for more detail.

Use with egg-redis

When using the egg-redis plugin, you can specify the redis client directly in the configuration.

exports.cache9 = {
  default: {
    ttl: 300,
  },
  clients: {
    cacheA: { // The memory cache needs to set both pubRedis and subRedis as string
      class: 'memory',
      pubRedis: 'cachePub', // app.redis.get('cachePub')
      subRedis: 'cacheSub', // app.redis.get('cacheSub')
    },
    cacheB: { // redis cache can set redis as string
      class: 'redis',
      redis: 'cache', // app.redis.get('cache')
    },
    cacheC: { // If you have not configured getRedis, redis and rds, use app.redis
      class: 'redis',
    }
  }
};