embark-area-51/lib/processes/storageProcesses/storageProcessesLauncher.js

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const fs = require('../../core/fs');
const utils = require('../../utils/utils');
const ProcessLauncher = require('../../process/ProcessLauncher');
const constants = require('../../constants');
class StorageProcessesLauncher {
constructor(options) {
this.logger = options.logger;
this.events = options.events;
this.processes = {};
}
processExited(storageName, code) {
this.logger.error(__(`Storage process for ${storageName} ended before the end of this process. Code: ${code}`));
}
launchProcess(storageName, callback) {
const self = this;
if (self.processes[storageName]) {
return callback(__('Storage process already started'));
}
const filePath = utils.joinPath(__dirname, `./${storageName}.js`);
fs.access(filePath, (err) => {
if (err) {
callback(__('No process file for this storage type exists. Please start the process locally.'));
}
self.logger.info(__(`Starting ${storageName} process`).cyan);
self.processes[storageName] = new ProcessLauncher({
modulePath: filePath,
logger: self.logger,
events: self.events,
silent: true,
exitCallback: self.processExited.bind(this, storageName)
});
self.processes[storageName].send({action: constants.blockchain.init, options: {}});
callback();
});
}
}
module.exports = StorageProcessesLauncher;