Build a Spring-Data project with MongoDB in under 5 minutes using Netbeans 7 and Maven

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Spring-Data is a rapidly moving project and has support for many technologies such as non-relational databases, map-reduce frameworks, and cloud based data services as well as providing support for relational databases. Today I’m going to focus on their support for MongoDB.


Note: I’m going to borrow the starter code from the Spring-Data documentation. I will be changing the version from M3 to M4 however and the current Spring-Data documentation is assuming M3 (as of the date of this article) and it looks like they did some namespace changes from M3 to M4 so I’m fixing that in the code for this article. By the time you read this however the documentation on their site might be updated to M4 or newer.

I am using Netbeans 7 with the Maven support to build and run the project.

With Netbeans create a new Maven Java Application called: SpringDataMongoDB

Modify the pom.xml to include the following new repository:


  
    spring-milestone
    Spring Maven MILESTONE Repository
    http://maven.springframework.org/milestone
  

We need to add one dependency to the pom.xml as well:


    org.springframework.data
    spring-data-mongodb
    1.0.0.M4
  

My full POM file looks like this:


    4.0.0

    com.giantflyingsaucer
    SpringDataMongoDB
    1.0-SNAPSHOT
    jar

    SpringDataMongoDB
    http://maven.apache.org

    
        UTF-8
    
  
    
        
            spring-maven-release
            Spring Maven Release Repository
            http://maven.springframework.org/release
        
        
            spring-maven-milestone
            Spring Maven Milestone Repository
            http://maven.springframework.org/milestone
        
    

    
        
            org.springframework.data
            spring-data-mongodb
            1.0.0.M4
                
        
            junit
            junit
            3.8.1
            test
        
    

When Netbeans generates the new project it will by default create a file called: App.java

Modify the App.java file as follows:

package com.giantflyingsaucer;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.mongodb.Mongo;

import java.net.UnknownHostException;

import org.springframework.data.mongodb.core.MongoOperations;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;


public class App 
{
    private static final Log log = LogFactory.getLog(App.class);
    
    public static void main( String[] args )
    {
        try {
            MongoOperations mongoOps = new MongoTemplate(new Mongo(), "mydb");
            mongoOps.insert(new Person("Joe", 34));
            log.info(mongoOps.findOne(new Query(Criteria.where("name").is("Joe")), Person.class));
            mongoOps.dropCollection("person");
        }
        catch(UnknownHostException ex) {
            log.error(ex.getMessage());
        }
    }
}

With Netbeans right-click on the project and add new class called: Person

The Person.java code is a very simple POJO:

package com.giantflyingsaucer;

public class Person {

  private String id;
  private String name;
  private int age;
   
  public Person(String name, int age) {
    this.name = name;
    this.age = age;
  }
  
  public String getId() {
    return id;
  }
  public String getName() {
    return name;
  }
  public int getAge() {
    return age;
  }
  
  @Override
  public String toString() {
    return "Person [id=" + id + ", name=" + name + ", age=" + age + "]";
  }  
}

Add a log4j.properties file to the resources folder. Here is the one that the Spring documentation suggests as a start:

log4j.rootCategory=INFO, stdout

log4j.appender.stdout=org.springframework.data.document.mongodb.log4j.MongoLog4jAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d %p [%c] - <%m>%n
log4j.appender.stdout.host = localhost 
log4j.appender.stdout.port = 27017
log4j.appender.stdout.database = logs
log4j.appender.stdout.collectionPattern = %X{year}%X{month}
log4j.appender.stdout.applicationId = my.application
log4j.appender.stdout.warnOrHigherWriteConcern = FSYNC_SAFE

log4j.category.org.apache.activemq=ERROR
log4j.category.org.springframework.batch=DEBUG
log4j.category.org.springframework.data.document.mongodb=DEBUG
log4j.category.org.springframework.transaction=INFO

My final project structure looks like the following:

With Maven do a Clean and Build on the project (you can do this in Netbeans 7 by right-clicking on the project and selecting that option).

At this point you need to get MongoDB running, check out the docs on how to do that and when it’s running on your computer follow the final step below.

With MongoDB started you can now run the project.

Expected results:

[exec:exec]
Oct 30, 2011 9:18:14 PM com.giantflyingsaucer.App main
INFO: Person [id=4eae056603640e4e098501f7, name=Joe, age=34]

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One Response to Build a Spring-Data project with MongoDB in under 5 minutes using Netbeans 7 and Maven

  1. Hemambaradara Muthyala says:

    pretty cool overview!

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