I have the following file :

spring:
  data:
    mongodb:
      uri: <url>
      database: <database>

I have created my Mongo Config File :

@Configuration
@EnableMongoRepositories
public class MongoConfig extends AbstractMongoClientConfiguration {

    @Value("${spring.data.mongodb.database}")
    private String databaseName;

    @Value("${spring.data.mongodb.uri}")
    private String mongoUri;

    @Bean
    MongoTransactionManager transactionManager(MongoDatabaseFactory dbFactory) {
        return new MongoTransactionManager(dbFactory);
    }

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

    @Override
    public MongoClient mongoClient() {
        final ConnectionString connectionString = new ConnectionString(mongoUri);
        final MongoClientSettings mongoClientSettings = MongoClientSettings.builder()
                .applyConnectionString(connectionString)
                .build();
        return MongoClients.create(mongoClientSettings);
    }

    @Bean
    public MongoTemplate mongoTemplate() throws Exception {
        return new MongoTemplate(mongoDbFactory());
    }

    @Bean
    public MongoDatabaseFactory mongoDbFactory() {
        return new SimpleMongoClientDatabaseFactory(mongoClient(), getDatabaseName());
    }

    @PostConstruct
    public void init() {
        System.out.println("MongoConfig initialized with database: " + databaseName);
    }
}

Currently the bean was not getting picked by spring application as Spring Boot applying its default MongoDB auto-configuration.
So i added the following line of code :

@SpringBootApplication(exclude = {MongoAutoConfiguration.class, MongoDataAutoConfiguration.class})

Now i am getting the error required a bean named 'mongoTemplate' that could not be found.

1. How to enable the transactionManager for mongo db ? as by defaults it’s no there that’s why i have create my own class.