Joe Uhren
8bcb995728
-Moved the database initialize call out of the instance code into the prestart script so that it is now only called once when you start the explorer even if you are running multiple cpus/threads -The database connection function now uses the default connection string in the event a connection string is not supplied -Removed unused reference to lib/explorer.js code from the cluster file
88 lines
2.7 KiB
Plaintext
88 lines
2.7 KiB
Plaintext
var cluster = require('cluster');
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if (cluster.isMaster) {
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const isWinOS = process.platform == 'win32';
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const instances = (process.argv[2] != null && process.argv[2] != '' && !isNaN(process.argv[2]) && Number.isInteger(parseFloat(process.argv[2])) ? parseInt(process.argv[2]) : require('os').cpus().length);
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console.log('Starting cluster with pid: ' + process.pid);
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function startWorkers() {
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// create worker instances
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for (var i = 0; i < instances; i += 1)
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cluster.fork();
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}
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function killAllWorkers(isRestart) {
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// send kill cmd to all workers
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for (var id in cluster.workers) {
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console.log('Worker (' + id + ') shutting down...');
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if (!isWinOS || isRestart) {
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// only kill the worker if not on windows (otherwise an error is displayed) or if the cluster is being restarted
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process.kill(cluster.workers[id]['process']['pid'], 'SIGINT');
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}
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}
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}
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function waitForWorkerShutdown(isRestart) {
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if (Object.keys(cluster.workers).length > 0) {
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// continue waiting since worker threads are still open
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setTimeout(waitForWorkerShutdown, 100, isRestart);
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} else {
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// all worker threads have closed
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// check if the cluster process should stop or if the workers should be restarted
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if (isRestart) {
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// start new worker threads
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startWorkers();
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} else {
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// exit the master process
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if (isWinOS) {
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// command line in windows doesn't seem to release itself
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// show a message that the app has finished
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console.log('The application is now safe to close');
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}
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process.exit(0);
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}
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}
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}
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// ensure workers exit cleanly
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process.on('SIGINT', () => {
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console.log('Cluster shutting down..');
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// send kill cmd to all workers
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killAllWorkers(false);
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// wait for workers to stop
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waitForWorkerShutdown(false);
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});
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startWorkers();
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// listen for dying workers
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cluster.on('exit', function (worker, code, signal) {
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if (worker['process']['exitCode'] === 0) {
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console.log('Worker (' + worker['id'] + ') shutdown complete');
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} else if (signal != 'SIGINT' && worker['process']['exitCode'] !== 0 && worker['process']['exitCode'] !== 999 && worker.exitedAfterDisconnect !== true) {
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console.log('Cluster restarting...');
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cluster.fork();
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}
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});
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// listen for the restart cmd
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cluster.on('message', function (data, msg) {
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// check if this was the restart cmd
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if (msg != null && msg == 'restart') {
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console.log('Cluster restarting..');
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// send kill cmd to all workers
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killAllWorkers(true);
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// wait for workers to stop
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waitForWorkerShutdown(true);
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}
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});
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} else
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require('./instance'); |