Question

我正在尝试使用电子开发桌面应用程序，并且我想在进程终止（即Ctrl + C）之前运行一个更新查询（用于更新字段logout_time）。在我当前的实现中，该应用程序捕获了进程的终止，但未按预期运行更新。

我有一个清理代码，当用户执行Ctrl + C时会执行

routes / index.js

 let Hardware = require('../models/Hardware');

var cleanup = require('../cleanup').Cleanup(myCleanup);

function myCleanup() {
  console.log('App specific cleanup code...');

  var now = new Date();
  // console.log(now)
   Hardware.findOneAndUpdate({uuid: "4C4C4544-0056-5810-8054-C4C04F595A31"}, {logout_time : now },
        function(err, hardware){
        console.log('trigger on close')
        pusher.trigger('my-hardware', 'my-cast', {
      hardware:hardware
    });
}) 
}

cleanup.js

exports.Cleanup = function Cleanup(callback) {

  // attach user callback to the process event emitter
  // if no callback, it will still exit gracefully on Ctrl-C
  callback = callback || noOp;
  process.on('cleanup',callback);

  // do app specific cleaning before exiting
  process.on('exit', function () {
    process.emit('cleanup');
  });

  // catch ctrl+c event and exit normally
  process.on('SIGINT', function () {
    console.log('Ctrl-C...');
    process.exit(2);
  });

  //catch uncaught exceptions, trace, then exit normally
  process.on('uncaughtException', function(e) {
    console.log('Uncaught Exception...');
    console.log(e.stack);
    process.exit(99);
  });
};

感谢任何替代方案/解决方案，谢谢！

预期结果：当我用Ctrl + C终止服务器时，它应在此记录上运行FindOneAndUpdate并用当前时间更新logout_time字段。

关闭节点服务器连接之前运行mongo查询

0 个答案: