better hot reload code - nodejs - save data on exit

[shimondoodkin]

this is a one-liner for each time reload a file

var f=require.resolve('./functions.js');if(require.cache[f]){if(require.cache[f].exports.unload) require.cache[f].exports.unload();delete require.cache[f];}f=require(f);

also i suggest in this code unload event for a module

var f=require.resolve('./functions.js');
if(require.cache[f])
{
    if(require.cache[f].exports.unload) require.cache[f].exports.unload()
    delete require.cache[f];
}
f=require(f);

in the module

exports.unload=function(cb)
{
 //
 save_data();
 //
 if(cb)cb();
}

// exmple saving code:

var last_saved=new Date();
var last_activity=new Date();
var saveing_data=false;
function save_data()
{
 if(last_activity<=last_saved) return;
 if(saveing_data) return;
 saveing_data=true;
   //actualy save data here  
   console.log("data saved")
   require('fs').writeFileSync(__dirname+'/data.json',"text"+(new Date()));
   ///
 last_saved=new Date();
 saveing_data=false;
}
setInterval(save_data,10000);

in the app:

function handleexit(cb)
{
 var fs=Object.keys(require.cache)
 function loop()
 {
  if(fs.length==0){cb();return;}
  var f=fs.pop();
  if(require.cache[f].exports.unload)
   require.cache[f].exports.unload(loop)
  else
   loop()
 }
 loop();
}


process.on('SIGTERM', function () {
 console.log('Got SIGTERM, will exit in 10 seconds ');
 var num=1;
 var n=setInterval(function(){
  console.log(num)
  num++;
 },1000); 
 var c=setTimeout(function(){
  if(n)clearTimeout(n);
  process.exit(0);
 },10000) 

 handleexit(function(){
  if(c)clearTimeout(c);
  if(n)clearTimeout(n);
  process.exit(0);
 })
});

process.on('SIGINT', function () {
 console.log('Got SIGINT, will exit in 10 seconds ');
 var num=1;
 var n=setInterval(function(){
  console.log(num)
  num++;
 },1000); 
 var c=setTimeout(function(){
  if(n)clearTimeout(n);
  process.exit(0);
 },10000) 

 handleexit(function(){
  if(c)clearTimeout(c);
  if(n)clearTimeout(n);
  process.exit(0);
 })
});