first-fix

msa/js-executor/api/httpServer.ts

@@ -0,0 +1,65 @@
+///
+/// Copyright © 2016-2023 The Thingsboard Authors
+///
+/// Licensed under the Apache License, Version 2.0 (the "License");
+/// you may not use this file except in compliance with the License.
+/// You may obtain a copy of the License at
+///
+///     http://www.apache.org/licenses/LICENSE-2.0
+///
+/// Unless required by applicable law or agreed to in writing, software
+/// distributed under the License is distributed on an "AS IS" BASIS,
+/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+/// See the License for the specific language governing permissions and
+/// limitations under the License.
+///
+
+import express from 'express';
+import { _logger}  from '../config/logger';
+import http from 'http';
+import { Socket } from 'net';
+
+export class HttpServer {
+
+  private logger = _logger('httpServer');
+  private app = express();
+  private server: http.Server | null;
+  private connections: Socket[] = [];
+
+  constructor(httpPort: number) {
+    this.app.get('/livenessProbe', async (req, res) => {
+      const message = {
+        now: new Date().toISOString()
+      };
+      res.send(message);
+    })
+
+    this.server = this.app.listen(httpPort, () => {
+      this.logger.info('Started HTTP endpoint on port %s. Please, use /livenessProbe !', httpPort);
+    }).on('error', (error) => {
+      this.logger.error(error);
+    });
+
+    this.server.on('connection', connection => {
+      this.connections.push(connection);
+      connection.on('close', () => this.connections = this.connections.filter(curr => curr !== connection));
+    });
+  }
+
+  async stop() {
+    if (this.server) {
+      this.logger.info('Stopping HTTP Server...');
+      const _server = this.server;
+      this.server = null;
+      this.connections.forEach(curr => curr.end(() => curr.destroy()));
+      await new Promise<void>(
+          (resolve, reject) => {
+            _server.close((err) => {
+              this.logger.info('HTTP Server stopped.');
+              resolve();
+            });
+          }
+      );
+    }
+  }
+}