Sample spring mongodb project setup with mongodb custom converters

ApplicationConfig.java

import com.mongodb.Mongo;
import com.mongodb.MongoClient;
import com.mongodb.MongoCredential;
import com.mongodb.ServerAddress;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.mongodb.config.AbstractMongoConfiguration;
import org.springframework.data.mongodb.repository.config.EnableMongoRepositories;

import java.util.Arrays;
import java.util.ArrayList;
import java.util.List;

@Configuration
@EnableMongoRepositories(basePackages = "com.arthurportas.repo.mongo")
@ComponentScan(basePackages = "com.arthurportas")
public class SpringMongoConfig extends AbstractMongoConfiguration {

    @Value("${mongo.host}")//read from config
    private String host;

    @Value("${mongo.port}")//read from config
    private int port;

    @Value("${mongo.db}")//read from config
    private String databaseName;

    @Value("${mongo.username}")//read from config
    private String userName;

    @Value("${mongo.password}")//read from config
    private String password;

    private final List<Converter<?, ?>> converters = new ArrayList<Converter<?, ?>>();

    @Override
    public String getDatabaseName() {
        return databaseName;
    }

    @Override
    @Bean
    public Mongo mongo() throws Exception {
        return new MongoClient(serverAddress(), Arrays.asList(mongoCredential()));
    }

    @Override
    protected String getMappingBasePackage() {
        return "com.arthurportas.domain.mongo.entities";
    }

    @Bean
    public ServerAddress serverAddress() throws Exception {
        return new ServerAddress();//TODO: read host+port from config
    }

    @Bean
    public MongoCredential mongoCredential() {
        return MongoCredential.createCredential(
                this.userName,
                getDatabaseName(),
                this.password.toCharArray());
    }

    
    @Override
    public CustomConversions customConversions() {
        converters.add(new BigDecimalToDoubleConverter());
        converters.add(new DoubleToBigDecimalConverterp());
        return new CustomConversions(converters);
    }
}

BigDecimalToDoubleConverter.java

import org.springframework.core.convert.converter.Converter;
import org.springframework.stereotype.Component;

import java.math.BigDecimal;

@Component
public class BigDecimalToDoubleConverter implements Converter<BigDecimal, Double> {

    @Override
    public Double convert(BigDecimal source) {
        return source.doubleValue();
    }
}

DoubleToBigDecimalConverter.java

import org.springframework.core.convert.converter.Converter;
import org.springframework.stereotype.Component;

import java.math.BigDecimal;
import java.math.RoundingMode;

@Component
public class DoubleToBigDecimalConverter implements Converter<Double, BigDecimal> {

    @Override
    public BigDecimal convert(Double source) {
        return new BigDecimal(source).setScale(2, RoundingMode.HALF_UP);
    }
}