Preparation of merge with master

lib/senders.js

@@ -1,50 +0,0 @@
-'use strict';
-
-const fork = require('child_process').fork;
-
-const config = require('config');
-const log = require('npmlog');
-const workers = new Set();
-
-function spawn(callback) {
-    let processes = Math.max(Number(config.queue.processes) || 1, 1);
-    let spawned = 0;
-    let returned = false;
-
-    if (processes > 1 && !config.redis.enabled) {
-        log.error('Queue', '%s processes requested but Redis is not enabled, spawning 1 process', processes);
-        processes = 1;
-    }
-
-    let spawnSender = function () {
-        if (spawned >= processes) {
-            if (!returned) {
-                returned = true;
-                return callback();
-            }
-            return false;
-        }
-
-        let child = fork(__dirname + '/../services/sender.js', []);
-        let pid = child.pid;
-        workers.add(child);
-
-        child.on('close', (code, signal) => {
-            spawned--;
-            workers.delete(child);
-            log.error('Child', 'Sender process %s exited with %s', pid, code || signal);
-            // Respawn after 5 seconds
-            setTimeout(() => spawnSender(), 5 * 1000).unref();
-        });
-
-        spawned++;
-        setImmediate(spawnSender);
-    };
-
-    spawnSender();
-}
-
-module.exports = {
-    workers,
-    spawn
-};