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src/application.ts

@@ -0,0 +1,16 @@
+import {ApplicationConfig} from '@loopback/core';
+import {RestApplication} from '@loopback/rest';
+import {RestExplorerBindings} from '@loopback/rest-explorer';
+import {PingController} from './controllers/ping.controller';
+
+export class Application extends RestApplication {
+  constructor(options: ApplicationConfig = {}) {
+    super(options);
+    this.projectRoot = __dirname;
+    this.controller(PingController);
+    this.bind(RestExplorerBindings.CONFIG).to({
+      path: '/explorer',
+    });
+  }
+}
+

src/controllers/ping.controller.ts

@@ -0,0 +1,9 @@
+import {get} from '@loopback/rest';
+
+export class PingController {
+  @get('/ping')
+  ping(): object {
+    return {message: 'pong'};
+  }
+}
+

src/index.ts

@@ -0,0 +1,14 @@
+import {Application} from './application';
+
+export async function main() {
+  const app = new Application();
+  await app.boot();
+  await app.start();
+  console.log(`Application is running at http://127.0.0.1:3000`);
+}
+
+main().catch(err => {
+  console.error('Cannot start the application.', err);
+  process.exit(1);
+});
+

src/sequence.ts

@@ -0,0 +1,35 @@
+import {
+  SequenceHandler,
+  FindRoute,
+  ParseParams,
+  InvokeMethod,
+  Send,
+  Reject,
+  RequestContext,
+} from '@loopback/rest';
+
+export class MySequence implements SequenceHandler {
+  constructor(
+    public findRoute: FindRoute,
+    public parseParams: ParseParams,
+    public invoke: InvokeMethod,
+    public send: Send,
+    public reject: Reject,
+  ) {}
+
+  async handle(context: RequestContext): Promise<void> {
+    const {request, response} = context;
+    try {
+      const route = this.findRoute(request);
+
+      const args = await this.parseParams(request, route);
+
+      const result = await this.invoke(route, args);
+
+      this.send(response, result);
+    } catch (error) {
+      this.reject(context, error);
+    }
+  }
+}
+