@jameswragg/hapi-cache-stats

Cache insights for Hapi.js servers with Catbox cache policies

Installation

npm i @jameswragg/hapi-cache-stats

Register the plugin as (one of) the first plugins on the server to ensure policies are caught.

const Hapi = require('@hapi/hapi');
const HapiCacheStats = require('@jameswragg/hapi-cache-stats');

(async () => {
  const server = Hapi.server({ port: 3000 });

  await server.register({
    plugin: HapiCacheStats,
    options: {
      // options here
    },
  });

  // app code here - using Catbox caches

  await server.start();

  console.log(`Start adding at ${server.info.uri}`);
})();

Then visit http://localhost:3000/cache-stats for live, real-time stats on all registered cache policies & method stats.

Main policy stats view

Seeing what methods use the cache policy & their individual stats

Plugin options

• base - route to mount the UI on, default: '/cache-stats'
• snapshot - object with the following settings regarding snapshots:
  • interval - every X seconds, default: 5
  • retention: how many snapshots to retain, default: 60
• socketIo - socket.io server options, default: { cors: { origin: '*' } }

Development

To contribute to the project:

1. Clone the repo
2. npm install
3. npm run dev - will file up an example server with policies, caches and a Vite server to host the frontend

Then append ?dev to the url e.g. http://localhost:3000/cache-stats?dev. This will load the Vue front-end via the Vite server instead of built assets, supporting HMR on change etc.