Vigneshwaran R rvigneshw

## Get back data from Child process worker.js
worker.on('message', (processedData) => {
  doSomethingElse(processedData);
  worker.kill();
});

## Send the data.js
worker.send(data);

## Invoke the Worker.js
const worker = fork(filename.js)

## Child process code template.js
process.on('message', (payload) => {
  try {
    //Some time taking stuff
    const processedData = processData(payload);
    process.send(processedData);
  } catch (error) {
    process.send(error);
  }
});

## Importing Fork from Child process module.js
const fork = require('child_process').fork;

## Block the Event loop of nodeJS.js
let flag = false;
setTimeout(() => {
    // this callback never gets called
    // because event loop is blocked
    flag = true;
}, 1000);

while (!flag) {
    console.log("still waiting")
}

## docker-on-ubuntu.sh
echo "Removing Docker IF EXISTS"
sudo apt-get remove docker docker-engine docker.io containerd runc
echo "Getting Docker install Script"
curl -fsSL https://get.docker.com -o get-docker.sh
echo "Executing Docker install Script"
sudo sh get-docker.sh
echo "Getting Docker-compose"
sudo curl -L "https://github.com/docker/compose/releases/download/1.27.4/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose
	worker.on('message', (processedData) => {
	doSomethingElse(processedData);
	worker.kill();
	});
	process.on('message', (payload) => {
	try {
	//Some time taking stuff
	const processedData = processData(payload);
	process.send(processedData);
	} catch (error) {
	process.send(error);
	}
	});
	let flag = false;
	setTimeout(() => {
	// this callback never gets called
	// because event loop is blocked
	flag = true;
	}, 1000);

	while (!flag) {
	console.log("still waiting")
	}
	echo "Removing Docker IF EXISTS"
	sudo apt-get remove docker docker-engine docker.io containerd runc
	echo "Getting Docker install Script"
	curl -fsSL https://get.docker.com -o get-docker.sh
	echo "Executing Docker install Script"
	sudo sh get-docker.sh
	echo "Getting Docker-compose"
	sudo curl -L "https://github.com/docker/compose/releases/download/1.27.4/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
	sudo chmod +x /usr/local/bin/docker-compose