text: /**
   * Copyright 2018, OpenCensus 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.
   */
  
  const tracing = require('@opencensus/nodejs');
  const instana = require('@opencensus/exporter-instana');
  
  const exporter = new instana.InstanaTraceExporter();
  
  tracing.start({exporter});
  
  // example application
  const http = require('http');
  http.createServer((req, res) => {
    res.writeHead(200, { 'Content-Type': 'text/html' });
    res.write('Hello World!');
    res.end();
  }).listen(8080);