made auto restart call the call back only once

README.md

@@ -105,8 +105,23 @@ It is  basicly:  nginx<->nodejs as an upstream.
 also i added php-cgi to nginx to use moadmin.php - mongodb db editor.
 
 ### Multi Process
-you can put nginx or haproxy as a front and create nodejs1.sh, nodejs2.sh,
-nodejs3.sh, nodejs4.sh, and matching .conf files for the upstart.
-Also you can have port as an argument to your server.js.
-To achive best performance. it was found by testing 
-that the number of processors should much the number of cores not more not lest. 
+you can put nginx or haproxy as a front and create several .conf files for the upstart.
+
+in each you modify the execution line to contain port number ex.:
+in the nodejs1.conf
+    exec sudo -u www-data /bin/bash /var/www/nodejs-mongodb-app/nodejs.sh 8001
+in the nodejs2.conf
+    exec sudo -u www-data /bin/bash /var/www/nodejs-mongodb-app/nodejs.sh 8002
+
+and make port as an argument to your server.js.
+    //http.createServer(server_handler_function).listen(process.argv[2]||8001);
+    //see http://nodejs.org/api.html#process-argv-58
+    //process.argv.forEach(function (val, index, array) {
+    //  console.log(index + ': ' + val);
+    //});
+
+To achive best performance. it was found by testing (during development of twisted and nginx) that the number of processors should much the number of cores not more not lest. 
+
+### the idea behind the architecture 
+the idea is to add an extra level of fail-safety by using a stable system shell script to restart node instead of node itself.
+

autoexit.js

@@ -17,11 +17,14 @@
 
 var fs = require('fs');    // allaws to open files
 var sys = require('sys');  // allows to print errors to command line
-
+this.restarted=false;
+var that=this;
 
 function watch(parse_file_list_dirname,extention,callback) {
 
  var restart_server = function(file){
+    if(that.restarted) return;
+    that.restarted=true;
     if(callback)callback();
     sys.puts((new Date).toTimeString()+' change discovered, restarting server. the file was: '+file);
     process.exit();
@@ -87,4 +90,4 @@ function watch(parse_file_list_dirname,extention,callback) {
 this.watch=watch;
 
 
-////////  end auto exit //////////////////////////
+////////  end auto exit //////////////////////////