Let's use the Command-line Runner to insert some data into ReactiveMongo. The following snippet shows the details added to SpringReactiveExampleApplication:

    @Bean
    CommandLineRunner initData(
    StockMongoReactiveCrudRepository mongoRepository) {
      return (p) -> {
      mongoRepository.deleteAll().block();
      mongoRepository.save(
      new Stock("IBM", "IBM Corporation", "Desc")).block();
      mongoRepository.save(
      new Stock("GGL", "Google", "Desc")).block();
      mongoRepository.save(
      new Stock("MST", "Microsoft", "Desc")).block();
     };
    }

The mongoRepository.save() method is used to save the Stock document to ReactiveMongo. The block() method ensures that the save operation is completed before the next statement is executed.