Pages

August 18, 2014

Spring Data MongoDB

The Spring Data MongoDB project provides integration with the MongoDB document database.


The maven dependencies:

        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-mongodb</artifactId>
            <version>1.5.2.RELEASE</version>
        </dependency>



Activating Spring Data repository support using Java Config:


import java.util.Arrays;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.mongodb.config.AbstractMongoConfiguration;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.repository.config.EnableMongoRepositories;

import com.mongodb.Mongo;
import com.mongodb.MongoClient;
import com.mongodb.MongoCredential;
import com.mongodb.ServerAddress;
import com.mongodb.WriteConcern;


@Configuration
@ComponentScan
@EnableMongoRepositories
public class Application extends AbstractMongoConfiguration{

    @Override
    
protected String getDatabaseName() {
        
return "tuto";
    }

    @Override
    
public Mongo mongo() throws Exception {
        ServerAddress serverAdress = 
new ServerAddress("localhost", 27017);        MongoCredential credential = MongoCredential.createMongoCRCredential("moez","tuto","secret".toCharArray());
        
//Do not use new Mongo(), is deprecated.
        Mongo mongo = new MongoClient(serverAdress,Arrays.asList(credential));
        mongo.setWriteConcern(WriteConcern.SAFE);
        
return mongo;
    }

  
    @Override
    @Bean(name=
"template")
    
public MongoTemplate mongoTemplate() throws Exception {
        
return new MongoTemplate(mongo(), getDatabaseName());
    }

}


Note: Do not use
new Mongo()
because is deprecated.

Here is a basic example of using the save operation and retrieving its contents.

import static org.springframework.data.mongodb.core.query.Criteria.where;
import static org.springframework.data.mongodb.core.query.Criteria.query;

…

Person p = new Person("Bob", 33);
mongoTemplate.insert(p);

Person qp = mongoTemplate.findOne(query(where("age").is(33)), Person.class);




No comments:

Post a Comment