CODEWITHSUNDEEP
javascriptnode.jssynchronous
jagra
jagra

Reputation: 553

Sequential comunication between parent/child processes in node.js

I need to establish a dialog between parent and child processes in node.

I started with following:

var child = cp.fork(__dirname + '/Child',[],{silent: true});

Then set up an event handler on parent:

child.stdout.on('data', processChildResponses);

Child listens to stdin and answers writing to stdout. Parent writes to child stdin to send commands:

child.stdin.write("a command...\n");

Then I need to send a variable number of commands to child, some require response, others don't. For those that require response, I must wait for it (let's assume forever to make it simple), process the answer and send another command.

Child was simple because it only waits for a command, answers it and awaits another. So no problem there. But I'm having many problems with parent. Any ideas?

It's an incredibly simple task in java or c# but I would like to make it all in node.

Thanks in advance.

Upvotes: 0

Views: 167

Answers (1)

mscdex
mscdex

Reputation: 106698

Why not just use child.send() (in parent)/process.send() (in child)? That way you don't have to worry about buffering and parsing stdout and whatnot.

Upvotes: 1

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