conn-wrapper

conn-wrapper

A simple wrapper for connections which only allows passing string.

Usecase

There are a lots of times communication through connections and processes require dynamic Event Emitter rather than only listening on message event. This module allows dev to create events dynamicly through those connections.

Installation

  npm install --save conn-wrapper

Usage

Vanila

const cp = require('child_process');

const child = cp.fork(path.join('./child.js'));

child.on('message', function(message) {
  m = JSON.parse(message);

  if (m.event === 'event1') {
    // Do something
  } else if (m.event === 'event2') {
    // Do something
  } else if (m.event === 'event2') {
    ...
  }
  ...
})

With conn-wrapper

const ConnWrapper = require('conn-wrapper');
const cp = require('child_process');

const child = cp.fork(path.join('./child.js'));
const wrapper = ConnWrapper(child);

// Send event
wrapper.send('event', payload)

// Listen for an event
wrapper.on('event1', function(payload) {
  // Do something
});

To achieve this, the message sent by conn.send() must be a json or json format string. All other type will be ignored.

The message has 2 fields: event (name of the event to be listened on) and body (optinal, main content).

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License

MIT © nghiattran