how to specify database name in spring data mongoDB

Question

I am using Mongo repositories to perform CRUD operations as in the code below. Although this code works, but the documents and collections are created in a different DB than the one that I want. How can I explicitly specify a DB name to which documents will be stored.

The POJO class:

@Document(collection = "actors") public class Actor  {   @Id   private String id;   ...   //constructor   //setters & getters } 

The repository:

public interface ActorRepository extends MongoRepository<Actor, String>  {   public Actor findByFNameAndLName(String fName, String lName);   public Actor findByFName (String fName);   public Actor findByLName(String lName); } 

The service that uses the repository:

@Service public class ActorService  {   @Autowired   private ActorRepository actorRepository;    public Actor insert(Actor a)   {     a.setId(null);     return actorRepository.save(a);   } }  

And I access the service from a REST controller class:

@RestController public class Controllers  {    private static final Logger logger = Logger.getLogger(Controllers.class);   private static final ApplicationContext ctx = new  AnnotationConfigApplicationContext(SpringMongoConfig.class);    @Autowire   private ActorService actorService;    @RequestMapping(value="/createActor", method=RequestMethod.POST)   public @ResponseBody String createActor(@RequestParam(value = "fName") String fName,         @RequestParam(value = "lName") String lName,         @RequestParam(value = "role") String role)   {     return actorService.insert(new Actor(null,fName,lName,role)).toString();    }   ... } 

I have created this spring mongoDB configuration class which has the option of setting DB name, but could not figure out how to use it with the repositories above.

@Configuration public class SpringMongoConfig extends AbstractMongoConfiguration {      @Bean     public GridFsTemplate gridFsTemplate() throws Exception      {         return new GridFsTemplate(mongoDbFactory(), mappingMongoConverter());     }      @Override     protected String getDatabaseName()      {         return "MyDB";     }      @Override     @Bean     public Mongo mongo() throws Exception      {         return new MongoClient("localhost" , 27017 );     }      public @Bean MongoTemplate mongoTemplate() throws Exception      {         return new MongoTemplate(mongo(), getDatabaseName());     }     } 

Answer 1

Add to the application.properties a line

spring.data.mongodb.database=your_db_name 

That worked for me, maybe too late for you but this could help someone looking for the same problem. see more properties here!

Answer 2

For Spring-Boot:

You can either rely on autoconfiguration and then type in your application.properties file:

spring.data.mongodb.database=your_db_name 

or if you don't want to rely on Spring-boot autoconfiguration you can simply:

import com.mongodb.MongoClient; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.data.mongodb.MongoDbFactory; import org.springframework.data.mongodb.core.MongoTemplate; import org.springframework.data.mongodb.core.SimpleMongoDbFactory;  /**  * MonfoConfig  */ @Configuration public class MongoConfig {      @Bean     public MongoDbFactory mongoDbFactory() {          MongoClient mongoClient = new MongoClient("127.0.0.1:27017");          return new SimpleMongoDbFactory(mongoClient, "databasenamehere" );     }      @Bean     public MongoTemplate mongoTemplate() {         return new MongoTemplate(mongoDbFactory());     } } 

If you want to follow that path - I suggest having a look into into Spring Boot's Conditions Evaluation Report (https://www.baeldung.com/spring-boot-auto-configuration-report) and tweaking what you need to tweak. Hope this helps.