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doc: add example function isDead to cluster #28362

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doc: add example function isDead to cluster
jessecogollo Jun 21, 2019
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jessecogollo Jun 21, 2019
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jessecogollo Jun 25, 2019
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35 changes: 35 additions & 0 deletions doc/api/cluster.md
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Expand Up @@ -382,6 +382,41 @@ added: v0.11.14
This function returns `true` if the worker's process has terminated (either
because of exiting or being signaled). Otherwise, it returns `false`.

```js
const cluster = require('cluster');
const http = require('http');
const numCPUs = require('os').cpus().length;

if (cluster.isMaster) {
console.log(`Master ${process.pid} is running`);

// Fork workers.
for (let i = 0; i < numCPUs; i++) {
cluster.fork();
}

cluster.on('fork', (worker) => {
console.log('worker is dead:', worker.isDead());
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});

cluster.on('exit', (worker, code, signal) => {
console.log('worker is dead:', worker.isDead());
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});

} else {
// Workers can share any TCP connection
// In this case it is an HTTP server
http.createServer((req, res) => {
res.writeHead(200);
res.end(`Current process\n ${process.pid}`);
process.kill(process.pid);
}).listen(8000);

// Make http://localhost:8000 to ckeck isDead method.
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@trivikr trivikr Jun 24, 2019

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nit: typo

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// Make http://localhost:8000 to ckeck isDead method.
// Make http://localhost:8000 to check isDead method.

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@Trott Trott Jun 24, 2019

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"Make" means "Make a connection to" here?

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// Make http://localhost:8000 to ckeck isDead method.
// Connect to http://localhost:8000 to check isDead().

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@jessecogollo jessecogollo Jun 25, 2019

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Hi @Trott and @trivikr typo is fixed. Let me know other comment 😉

}

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```

### worker.kill([signal='SIGTERM'])
<!-- YAML
added: v0.9.12
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