first commit

core/workers/loadCandles/child.js

@@ -0,0 +1,28 @@
+var start = (config, candleSize, daterange) => {
+  var util = require(__dirname + '/../../util');
+
+  // force correct gekko env
+  util.setGekkoEnv('child-process');
+
+  // force disable debug
+  config.debug = false;
+  util.setConfig(config);
+
+  var dirs = util.dirs();
+
+  var load = require(dirs.tools + 'candleLoader');
+  load(config.candleSize, candles => {
+    process.send(candles);
+  })
+}
+
+process.send('ready');
+
+process.on('message', (m) => {
+  if(m.what === 'start')
+    start(m.config, m.candleSize, m.daterange);
+});
+
+process.on('disconnect', function() {
+  process.exit(0);
+})

core/workers/loadCandles/parent.js

@@ -0,0 +1,68 @@
+// example usage:
+
+// let config = {
+//   watch: {
+//     exchange: 'poloniex',
+//     currency: 'USDT',
+//     asset: 'BTC'
+//   },
+//   daterange: {
+//     from: '2016-05-22 11:22',
+//     to: '2016-06-03 19:56'
+//   },
+//   adapter: 'sqlite',
+//   sqlite: {
+//     path: 'plugins/sqlite',
+
+//     dataDirectory: 'history',
+//     version: 0.1,
+
+//     dependencies: [{
+//       module: 'sqlite3',
+//       version: '3.1.4'
+//     }]
+//   },
+//   candleSize: 100
+// }
+
+// module.exports(config, function(err, data) {
+//   console.log('FINAL CALLBACK');
+//   console.log('err', err);
+//   console.log('data', data.length);
+// })
+
+
+const fork = require('child_process').fork;
+const _ = require('lodash');
+
+module.exports = (config, callback) => {
+  var debug = typeof v8debug === 'object';
+  if (debug) {
+    process.execArgv = [];
+  }
+
+  const child = fork(__dirname + '/child');
+
+  const message = {
+    what: 'start',
+    config
+  }
+
+  const done = _.once(callback);
+
+  child.on('message', function(m) {
+    if(m === 'ready')
+      return child.send(message);
+
+    // else we are done and have candles!
+    done(null, m);
+    if (this.connected) {
+      this.disconnect();
+    }
+  });
+
+  child.on('exit', code => {
+    if(code !== 0)
+      done('ERROR, unable to load candles, please check the console.');
+  });
+}