Windows graceful shutdown fix

lib/API/schema.json

@@ -144,6 +144,11 @@
     "docDefault": 1600,
     "docDescription": "Time in ms before sending the final SIGKILL signal after SIGINT"
   },
+  "shutdown_with_message": {
+    "type": "boolean",
+    "docDefault": false,
+    "docDescription": "Shutdown an application with process.send('shutdown') instead of process.kill(pid, SIGINT)"
+  },
   "listen_timeout": {
     "type": "number",
     "docDescription": "Time in ms before forcing a reload if app is still not listening/has still note sent ready"

lib/God/ActionMethods.js

@@ -327,7 +327,7 @@ module.exports = function(God) {
       return cb(null, { error : true, message : 'could not kill process w/o pid'});
     }
 
-    God.killProcess(proc.process.pid, proc.pm2_env, function(err) {
+    var killCallback = function(err) {
       proc.pm2_env.status = cst.STOPPED_STATUS;
 
       God.notify('exit', proc);
@@ -352,7 +352,13 @@ module.exports = function(God) {
 
       proc.process.pid = 0;
       return cb(null, God.getFormatedProcess(id));
-    });
+    };
+
+    if(proc.pm2_env.shutdown_with_message == true && proc.process.send){
+      return God.softKillProcess(proc, killCallback);
+    }
+
+    God.killProcess(proc.process.pid, proc.pm2_env, killCallback);
   };
 
   God.resetMetaProcessId = function(id, cb) {

lib/God/Methods.js

@@ -224,6 +224,23 @@ module.exports = function(God) {
     }
   };
 
+  /**
+   * Description
+   * @method softKillProcess
+   * @param Object proc
+   * @param function cb
+   * @return CallExpression
+   */
+  God.softKillProcess = (proc, cb)=>{
+    if (!proc) return cb({msg: 'no proc object'});
+    if (!proc.process) return cb({msg: 'no process object'});
+    if (!proc.process.pid) return cb({msg : 'no pid for process or null'});
+
+    console.log('Send shutdown message for', proc.process.pid);
+    proc.process.send('shutdown');
+    God.processIsDead(proc.process.pid, proc.pm2_env, cb);
+  };
+
   /**
    * Description
    * @method getNewId

lib/binaries/CLI.js

@@ -46,6 +46,7 @@ commander.version(pkg.version)
   .option('--parallel <number>', 'number of parallel actions (for restart/reload)')
   .option('-p --pid <pid>', 'specify pid file')
   .option('-k --kill-timeout <delay>', 'delay before sending final SIGKILL signal to process')
+  .option('--shutdown-with-message', 'shutdown an application with process.send(\'shutdown\') instead of process.kill(pid, SIGINT)')
   .option('--listen-timeout <delay>', 'listen timeout on application reload')
   .option('--max-memory-restart <memory>', 'Restart the app if an amount of memory is exceeded (in bytes)')
   .option('--restart-delay <delay>', 'specify a delay between restarts (in milliseconds)')