pm2 IPC Minimum needed to send message to process

pm2-ipc.js

/*
The online documents were not very clear.
http://pm2.keymetrics.io/docs/usage/pm2-api/#send-message-to-process
https://stackoverflow.com/a/35504369/3386260
https://github.com/pm2-hive/pm2-hive.github.io/pull/117
*/

// Sender
// The sender can run inside or outside of pm2
var pm2 = require('pm2');
var neighborIds = [];

pm2.connect(function() {
  // Find the IDs of who you want to send to
  pm2.list(function(err, processes) {
    for (var i in processes) {
      console.log('Id:', processes[i].pm_id, 'Name:', processes[i].name)
      if(processes[i].name == 'scout') {
        neighborIds.push(processes[i].pm_id);
      }
    }

    // Call this once for each neighborIds
    pm2.sendDataToProcessId(MyNeighborId, {
        data : {
          some : 'data',
        },
        topic: 'some topic'
      }, function(err, res) {
        console.log(err, res);
      });
      console.log('Ids to send messages to:', neighborIds);
  });
});


// Receiver
// No need to require require('pm2') however the receiver must be running inside of pm2
process.on('message', function(packet) {
  console.log(packet);
});