package hello;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

import org.springframework.data.authentication.UserCredentials;

import org.springframework.data.mongodb.config.AbstractMongoConfiguration;

import org.springframework.data.mongodb.core.MongoOperations;

import org.springframework.data.mongodb.core.MongoTemplate;

import com.mongodb.Mongo;

import com.mongodb.MongoClient;

@Configuration

public class MongoConfig extends AbstractMongoConfiguration {

    @Bean

    public Mongo mongo() throws Exception {

        return new MongoClient();

    }

    @Bean

    public MongoTemplate mongoTemplate() throws Exception {

        UserCredentials user = new UserCredentials("scott", "tiger");

        return new MongoTemplate(mongo(), "test1", user);

    }

    @Override

    protected String getDatabaseName() {

        // TODO Auto-generated method stub

        return "test1";

    }

}

package hello;

import org.springframework.data.annotation.Id;

public class Customer {

    @Id

    private String id;

    private String firstName;

    private String lastName;

    public Customer() {}

    public Customer(String firstName, String lastName) {

        this.firstName = firstName;

        this.lastName = lastName;

    }

    @Override

    public String toString() {

        return String.format(

                "Customer[id=%s, firstName='%s', lastName='%s']",

                id, firstName, lastName);

    }

}

package hello;

import java.util.List;

import org.springframework.data.mongodb.repository.MongoRepository;

public interface CustomerRepository extends MongoRepository<Customer, String> {

    public Customer findByFirstName(String firstName);

    public List<Customer> findByLastName(String lastName);

}

package hello;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.boot.CommandLineRunner;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.AutoConfigureBefore;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.context.annotation.Import;

@SpringBootApplication

@AutoConfigureBefore

@Import(MongoConfig.class)

public class Application implements CommandLineRunner {

    @Autowired

    private CustomerRepository repository;

    public static void main(String[] args) {

        SpringApplication.run(Application.class, args);

    }

    @Override

    public void run(String... args) throws Exception {

        repository.deleteAll();

        // save a couple of customers

        repository.save(new Customer("Alice", "Smith"));

        repository.save(new Customer("Bob", "Smith"));

        // fetch all customers

        System.out.println("Customers found with findAll():");

        System.out.println("-------------------------------");

        for (Customer customer : repository.findAll()) {

            System.out.println(customer);

        }

        System.out.println();

        // fetch an individual customer

        System.out.println("Customer found with findByFirstName('Alice'):");

        System.out.println("--------------------------------");

        System.out.println(repository.findByFirstName("Alice"));

        System.out.println("Customers found with findByLastName('Smith'):");

        System.out.println("--------------------------------");

        for (Customer customer : repository.findByLastName("Smith")) {

            System.out.println(customer);

        }

    }

}