how to use child_process.fork in meteor - meteor

Question

I test the code in meteor .There are some errors.
/server/lib/Test.js
Test = {
say:function(){
console.log("hello world");
}
}
/server/main.js
Meteor.startup(function(){
Test.say(); //work well
var path = Npm.require('path');
var base = path.resolve('.');
var n = Npm.require('child_process').fork(base+"/app/server/children.js");
n.on('message', function(m) {
console.log('PARENT got message:', m);
});
n.send({ hello: 'world' });
});
/server/children.js
process.on('message', function(m) {
Test.say(); //throw a error . The Test is undefined
console.log('CHILD got message:', m);
process.send({name:"ABC"});
});
process.send({ foo: 'bar' });
errors:
I20131223-16:34:44.717(8)? hello world
W20131223-16:34:44.784(8)? (STDERR) /home/ec/workspace/meteor/testChildrenProcess/.meteor/local/build/programs/server/app/server/children.js:2
W20131223-16:34:44.784(8)? (STDERR) Test.say();
W20131223-16:34:44.785(8)? (STDERR) ^
W20131223-16:34:44.785(8)? (STDERR) ReferenceError: Test is not defined
W20131223-16:34:44.787(8)? (STDERR) at process. (/home/ec/workspace/meteor/testChildrenProcess/.meteor/local/build/programs/server/app/server/children.js:2:3)
W20131223-16:34:44.788(8)? (STDERR) at process.EventEmitter.emit (events.js:98:17)
W20131223-16:34:44.788(8)? (STDERR) at handleMessage (child_process.js:318:10)
W20131223-16:34:44.788(8)? (STDERR) at Pipe.channel.onread (child_process.js:345:11)
The Test Object is undefined in "/app/server/children.js" bu it's normal in main.js.
Why? Have I forgotten anything? Any help is appreciated.

Answer 1

The variables are scoped. While in Meteor Test would be available to the other files in your meteor project they are not available to Npm modules/stuff required by Npm.require.
The children.js would be in a different namespace to your main.js file. To access the Test variable in it you would need to pass it a param or as a message.