node.js run function in child process?

问题

I have a node.js application that receives a file, via a web request and then will apply a conversion process to this file. Since the task is long running this needs to run separate to the main thread.

At the moment I have just called the necessary code via a setTimeout() call. To isolate the main application from the conversion process I would like to move it out into a child process, since it is long running and I would like to isolate the main code from the work being done (am I worrying too much?). At the moment I am calling:

const execFile = require('child_process').execFile;
const child = execFile('node', './myModule.js', (error, stdout, stderr) => {
  if (error) {
    throw error;
  }
  console.log(stdout);
});

Is this the right approach in node.js, or is there of simply starting a child process with the module and params specified, but not have to specify 'node' as the executable?

回答1:

Just seen that node.js provides the 'fork' function, for executing modules, though they will need to be written as if they were expecting command line arguments, processing the process.argv array.

The command call being:

child_process.fork(modulePath[, args][, options])

More details here.

In my specific case forking probably doesn't make sense, since there is already a fork being made by the node.js library I am using.

来源：https://stackoverflow.com/questions/36850616/node-js-run-function-in-child-process