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Saturday, 9 November 2013

Spring Data MongoDB Simple Find example

08:36

Spring Data for MongoDB is part of the umbrella Spring Data project which aims to provide a familiar and consistent Spring-based programming model for for new datastores while retaining store-specific features and capabilities. See more about SpringData

In this example we will see how to save and retrieve Customer bean using SpringData and Mongodb.

Prerequisites: Mongodb should be up and running

1. Create a Maven Project
Create a Maven project and add below dependencies

<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>3.0.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>3.0.5.RELEASE</version>
</dependency>
<!-- mongodb java driver -->
<dependency>
<groupId>org.mongodb</groupId>
<artifactId>mongo-java-driver</artifactId>
<version>2.5.2</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-mongodb</artifactId>
<version>1.0.0.M2</version>
</dependency>
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>2.2</version>
</dependency>
</dependencies>
<repositories>
<repository>
<id>spring-milestone</id>
<name>Spring Maven MILESTONE Repository</name>
<url>http://maven.springframework.org/milestone</url>
</repository>
</repositories>
 

2. Create Customer entity

package com.vinod.model;

public class Customer {
public String name;
public String address;

public Customer(String name, String address) {
super();
this.name = name;
this.address = address;
}
public Customer() {
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
@Override
public String toString() {
return "Customer [name=" + name + ", address=" + address + "]";
}
}
 

3. Spring configuration xml

Place this file in to src/main/resources folder

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
xmlns:mongo="http://www.springframework.org/schema/data/mongo"
xsi:schemaLocation="http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/data/mongo
http://www.springframework.org/schema/data/mongo/spring-mongo-1.0.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd"
>
<!-- Default bean name is 'mongo' -->
<mongo:mongo host="localhost" port="27017" />
<bean id="customermongoTemplate" class="org.springframework.data.document.mongodb.MongoTemplate">
<constructor-arg ref="mongo" />
<constructor-arg name="databaseName" value="customerdb" />
<constructor-arg name="defaultCollectionName" value="customerCollection" />
</bean>
<!-- To translate any MongoExceptions thrown in @Repository annotated classes -->
<context:annotation-config />
</beans>

4. Create a Main class to save Customer details using spring data

package com.vinod.service;

import java.util.List;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.GenericXmlApplicationContext;
import org.springframework.data.document.mongodb.MongoOperations;
import org.springframework.data.document.mongodb.query.Criteria;
import org.springframework.data.document.mongodb.query.Query;

import com.vinod.model.Customer;

public class SpringDataFindExample {
    public static void main(String args[]) {
        ApplicationContext ctx = new GenericXmlApplicationContext("application-context.xml");
        MongoOperations mongoOperation = (MongoOperations) ctx.getBean("customermongoTemplate");
        Customer customer = new Customer("Vinod", "Bangalore");
        mongoOperation.save("customerDetails", customer);

        // findone
        Customer savedCustomer = mongoOperation.findOne("customerDetails",
                new Query(Criteria.where("name").is("Vinod")), Customer.class);
        System.out.println("savedCustomer : " + savedCustomer);

        // findall

        List<Customer> savedCustomerList = mongoOperation.find("customerDetails",
                new Query(Criteria.where("name").is("Vinod")), Customer.class);
        System.out.println("savedCustomerlist : " + savedCustomerList);

    }
}
 

5. Output

savedCustomer : Customer [name=Vinod, address=Bangalore]

savedCustomerlist : [Customer [name=Vinod, address=Bangalore], Customer [name=Vinod, address=Bangalore], Customer [name=Vinod, address=Bangalore]]

6. Done!! Download example

https://github.com/kkvinodkumaran/myrepository/tree/master/vinod-spring-data

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