chore: add unique id for each process

lib/God.js

@@ -381,6 +381,9 @@ God.handleExit = function handleExit(clu, exit_code, kill_signal) {
  * Init new process
  */
 God.prepare = function prepare (env, cb) {
+  // generate a new unique id for each processes
+  env.env.unique_id = Utility.generateUUID()
+
   // if the app is standalone, no multiple instance
   if (typeof env.instances === 'undefined') {
     env.vizion_running = false;

lib/God/ActionMethods.js

@@ -239,8 +239,13 @@ module.exports = function(God) {
 
     var proc = Utility.clone(God.clusters_db[id].pm2_env);
 
+
     delete proc.created_at;
     delete proc.pm_id;
+    delete proc.unique_id;
+
+    // generate a new unique id for new process
+    proc.unique_id = Utility.generateUUID()
 
     God.injectVariables(proc, function inject (_err, proc) {
       return God.executeApp(Utility.clone(proc), function (err, clu) {

lib/Utility.js

@@ -247,6 +247,18 @@ var Utility = module.exports = {
 
   checkPathIsNull: function(path) {
     return path === 'NULL' || path === '/dev/null';
+  },
+
+  generateUUID: function () {
+    var s = [];
+    var hexDigits = "0123456789abcdef";
+    for (var i = 0; i < 36; i++) {
+      s[i] = hexDigits.substr(Math.floor(Math.random() * 0x10), 1);
+    }
+    s[14] = "4";
+    s[19] = hexDigits.substr((s[19] & 0x3) | 0x8, 1);
+    s[8] = s[13] = s[18] = s[23] = "-";
+    return s.join("");
   }
 
 };

test/programmatic/id.mocha.js

@@ -0,0 +1,94 @@
+
+process.chdir(__dirname);
+
+var PM2 = require('../..');
+var should = require('should');
+var assert = require('assert')
+
+describe('Unique ID verification', function() {
+  describe('when starting', function() {
+    var _id = null
+
+    before(function(done) {
+      PM2.kill(done);
+    });
+
+    before(function(done) {
+      PM2.delete('all', function() { done() });
+    });
+
+    it('should connect to PM2', function(done) {
+      PM2.connect(done);
+    });
+
+    it('should start a script', function(done) {
+      PM2.start('../fixtures/child.js', function(err) {
+        should(err).be.null();
+        PM2.list(function(err, list) {
+          should(err).be.null();
+          assert(list.length > 0)
+          assert(typeof list[0].pm2_env.unique_id === 'string')
+          _id = list[0].pm2_env.unique_id
+          done();
+        });
+      });
+    });
+
+    it('should stop app by id', function(done) {
+      PM2.stop(0, done);
+    });
+
+    it('should restart and not changed unique id', function(done) {
+      PM2.restart(0, (err) => {
+        should(err).be.null();
+        PM2.list(function(err, list) {
+          should(err).be.null();
+          assert(list.length > 0)
+          assert(typeof list[0].pm2_env.unique_id === 'string')
+          assert( list[0].pm2_env.unique_id === _id)
+          done();
+        });
+      });
+    });
+
+
+    it('should generate another unique id for new process', function(done) {
+      PM2.start('./../fixtures/child.js', { name: 'toto' }, function(err) {
+        assert(!err);
+        PM2.list(function(err, list) {
+          should(err).be.null();
+          assert(list.length === 2)
+          assert(typeof list[0].pm2_env.unique_id === 'string')
+          assert(typeof list[1].pm2_env.unique_id === 'string')
+          assert(list[0].pm2_env.unique_id !== typeof list[1].pm2_env.unique_id)
+          done();
+        });
+      });
+    });
+
+    it('should duplicate a process and have a new id', function(done) {
+      PM2.scale('child', 2, function(err) {
+        assert(!err);
+        PM2.list(function(err, list) {
+          should(err).be.null();
+          should(list.length).eql(3);
+          assert(typeof list[0].pm2_env.unique_id === 'string')
+          assert(typeof list[1].pm2_env.unique_id === 'string')
+          assert(typeof list[2].pm2_env.unique_id === 'string')
+          assert(list[0].pm2_env.unique_id !== typeof list[1].pm2_env.unique_id)
+          assert(list[1].pm2_env.unique_id !== typeof list[2].pm2_env.unique_id)
+          assert(list[0].pm2_env.unique_id !== typeof list[2].pm2_env.unique_id)
+          done();
+        });
+      });
+    });
+
+    after(function(done) {
+      PM2.delete('all', done);
+    });
+
+    after(function(done) {
+      PM2.kill(done);
+    });
+  });
+});