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--- swdev:js:using_node.js [2018/07/13 16:09]
smayr
+++ swdev:js:using_node.js [2018/07/18 14:03] (current)
smayr [References]
@@ Line 21: / Line 21: @@
 Hello World (HTML mode):
-<code js>
+<code javascript>
 const http     = require('http');
 const hostname = '127.0.0.1';
@@ Line 135: / Line 135: @@
 </code>
-=== Running App Forever ===
+== Running App Forever ==
-Install ''forever'' module
+Install ''forever'' module:
   $ npm install -g forever
-And then start your application with:
+Start your application:
   $ forever server.js
-Or as a service:
+Alternatively, start your application as a service:
   $ forever start server.js
-Forever restarts your app when it crashes or stops for some reason. To restrict restarts to 5 you could use:
+''forever'' restarts your app when it crashes or stops for some reason. To restrict restarts to 5 times, use:
   $ forever -m5 server.js
-To list all running processes:
+List all running processes, note the integer in the brackets, and use it to stop a process:
   $ forever list
-Note the integer in the brackets and use it as following to stop a process:
   $ forever stop 0
-Restarting a running process goes:
+List all running processes, and restart a running process goes:
+  $ forever list
   $ forever restart 0
-If you're working on your application file, you can use the -w parameter to restart automatically whenever your server.js file changes:
+When working on your application file, you can use the -w parameter to restart automatically whenever your server.js file changes:
   $ forever -w server.js
+== Running App as Cronjob ==
+<code javascript>
+// Run main loop as a cronjob.
+// Alternative to: $ forever start app.js (requires: $ npm install forever)
+var CronJob = require('cron').CronJob;
+var job = new CronJob({
+  cronTime: '00 30 11 * * 1-5',
+  onTick: function() {
+    /*
+     * Runs every weekday (Monday through Friday)
+     * at 11:30:00 AM. It does not run on Saturday
+     * or Sunday.
+     */
+  },
+  start: false,
+  timeZone: 'America/New_York'
+});
+job.start();
+</code>
+<code javascript>
+// Run main loop, executing doSomeWork() on timer
+// Alternative to: $ forever start app.js (requires: $ npm install forever)
+function run() {
+    setInterval(doSomeWork, refreshInterval);
+};
+run();
+</code>
 == References ==
   * [[https://www.w3schools.com/nodejs/default.asp|W3 Schools Tutorial: Node.js]]
   * [[https://nodejs.org/dist/latest-v6.x/docs/api/synopsis.html|Node.js API Synopsis]]
   * [[http://nodeexamples.com|Node Examples]]
+  * [[https://github.com/mapbox/node-sqlite3/wiki/API|SQLite3 API for Node JS]]