Heroku - mLab MongoDB - Spring Boot - How to start example

application.properties

# MONGODB
spring.data.mongodb.uri=${MONGODB_URI}

Heroku - mLab MongoDB - Spring Boot - How to start example StatEntry.java

import org.springframework.data.annotation.Id;
import org.springframework.data.mongodb.core.mapping.Document;

@Document(collection = "stats")
public class StatEntry {

    @Id
    public String id;

    private long time;

    private String referrer;

    private String site;

    ...

}

pom.xml

...
  <dependencies>
    ...
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-mongodb</artifactId>
        </dependency>
    ...
  </dependencies>
...

StatEntryRepo.java

import org.springframework.data.mongodb.repository.MongoRepository;

import java.util.List;

public interface StatEntryRepo extends MongoRepository<StatEntry, String> {

    StatEntry findOneById(String id);

    List<StatEntry> findAll();

    void delete(StatEntry entry);

    void deleteAll();

}

StatService.java

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.time.Instant;
import java.util.UUID;

@Component
public class StatService {

    @Autowired
    public StatEntryRepo statsRepo;

    public void addStatEntry(String site, String referrer) {
        StatEntry entry = new StatEntry();
        entry.setSite(site);
        entry.setReferrer(referrer);
        entry.setTime(Instant.now().toEpochMilli());
        entry.setId(UUID.randomUUID().toString());
        statsRepo.save(entry);
    }

    ...

}