Spring MongoConfig with client config + Custom converters

MongoDBConfig.java

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanPostProcessor;
import org.springframework.boot.autoconfigure.mongo.MongoClientSettingsBuilderCustomizer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.mongodb.core.convert.MappingMongoConverter;


@Configuration(proxyBeanMethods = false)
class MongoConfig {
    @Bean
    MongoClientSettingsBuilderCustomizer mongoClientSettingsBuilderCustomizer() {
        return clientSettingsBuilder -> clientSettingsBuilder
                .applyToClusterSettings(builder -> builder
                        .serverSelectionTimeout(5000, TimeUnit.MILLISECONDS)
                )
                .applyToSocketSettings(builder -> builder
                        .readTimeout(5000, TimeUnit.MILLISECONDS)
                        .connectTimeout(2000, TimeUnit.MILLISECONDS)
                );
    }

    @Bean
    BeanPostProcessor mappingMongoConverterBeanPostProcessor() {
        return new BeanPostProcessor() {
            @Override
            public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
                if (bean instanceof MappingMongoConverter mongoMapping) {
                    mongoMapping.setCustomConversions(
                        new MongoCustomConversions(
                            List.of(
                                new ZonedDateTimeReadConverter(),
                                new ZonedDateTimeWriteConverter()
                            )
                        )
                    );
                    mongoMapping.afterPropertiesSet();
                }
                return bean;
            }
        };
    }
}