javax.persistence.EntityNotFoundException: Could not find Spring Save Repository

When using Spring Save Repository, it is possible to encounter the javax.persistence.EntityNotFoundException error. This error is thrown when the entity being searched for in the repository is not found.

Causes of the Error

There are several possible causes of this error message, including:

1. The entity being searched for does not exist in the database.
2. The entity being searched for is spelled incorrectly.
3. The entity being searched for is of the wrong type.
4. The repository is not configured correctly or is not accessible.

Resolving the Error

To resolve the javax.persistence.EntityNotFoundException error, follow these steps:

1. Check that the entity being searched for exists in the database. If it does not exist, create the entity in the database.
2. Ensure that the entity is spelled correctly in the code.
3. Verify that the entity being searched for is of the correct type.
4. Check that the repository is correctly configured and accessible.

@Repository
public interface MyRepository extends JpaRepository<MyEntity, Long>{
  Optional<MyEntity> findBySomeProperty(String someProperty);
}

In the example above, the MyRepository interface extends JpaRepository and declares a method for finding an entity by someProperty. If the entity is not found, the javax.persistence.EntityNotFoundException error message will be thrown.

To handle this error message, wrap the repository call in a try-catch block as follows:

@Service
public class MyService {
    @Autowired
    private MyRepository myRepository;

    public MyEntity findMyEntityBySomeProperty(String someProperty) {
        try {
            return myRepository.findBySomeProperty(someProperty)
                .orElseThrow(() -> new EntityNotFoundException());
        } catch (EntityNotFoundException exception) {
            throw new EntityNotFoundException("Could not find MyEntity with property " + someProperty);
        }
    }
}

By wrapping the repository call in a try-catch block, you can handle the javax.persistence.EntityNotFoundException error message and provide a more meaningful error message to the caller.

Conclusion

The javax.persistence.EntityNotFoundException error message can be resolved by verifying that the entity being searched for exists in the database, is spelled correctly, is of the correct type, and that the repository is correctly configured and accessible. By wrapping the repository call in a try-catch block, you can handle the error message and provide a more meaningful error message to the caller.