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Suppose I have 2 script, father.ts and child.ts, how do I spawn child.ts from father.ts and periodically send message from father.ts to child.ts ?
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Spawned Child Processes. The spawn function launches a command in a new process and we can use it to pass that command any arguments. For example, here's code to spawn a new process that will execute the pwd command. const { spawn } = require('child_process'); const child = spawn('pwd');
The read end of one pipe serves as standard input for the child process, and the write end of the other pipe is the standard output for the child process.
You have to use the Worker API
father.ts
const worker = new Worker("./child.ts", { type: "module", deno: true });
worker.postMessage({ filename: "./log.txt" });
child.ts
self.onmessage = async (e) => {
const { filename } = e.data;
const text = await Deno.readTextFile(filename);
console.log(text);
self.close();
};
You can send messages using .postMessage
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