MongoDB + Spring MVC | Biz Web Apps

NoSQL (Not Only SQL) is growing beside a RDB (Relational database). For example, DynamoDB for Amazon, BigTable for Google, Apollo for Facebook, and so forth. MongoDB is the one of most popular NoSQL DB.

Overview

It is said to be “Documente Oriented”, and they call table as “Collection”.
Unlike RDB, it does not support JOIN.
It Supports an ARRAY in a single record (document).
The format looks like JSON object. Therefore, it is good to use with Web Service.
Mongo DB is written in C++

This example is Spring MVC with CRUD operation by Mongo DB to demonstrate Web Service. And here is the configuration:

<!-- Mongo DB -->
<dependency>
	<groupId>org.springframework.data</groupId>
	<artifactId>spring-data-mongodb</artifactId>
	<version>1.5.2.RELEASE</version>
</dependency>
<dependency>
	<groupId>org.mongodb</groupId>
	<artifactId>mongo-java-driver</artifactId>
	<version>2.12.4</version>
</dependency>

<dependency>
	<groupId>com.drewnoakes</groupId>
	<artifactId>metadata-extractor</artifactId>
	<version>2.4.0-beta-1</version>
</dependency>

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
  <display-name>ns2015mvcmongo001</display-name>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>

    <servlet>
        <servlet-name>ns2015</servlet-name>
        <servlet-class>
            org.springframework.web.servlet.DispatcherServlet
        </servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>ns2015</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

NOTE: At line 16 of web.xml, servlet-name is specified as ns2015. Therefore, servlet context file will be “ns2015-servlet.xml“.

<?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/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
        http://www.springframework.org/schema/data/mongo http://www.springframework.org/schema/data/mongo/spring-mongo-1.5.xsd">

	<context:component-scan base-package="com.ns.spring" />
	 
	<!-- Configuration defining views files -->	 
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
	    <property name="prefix">
	        <value>/WEB-INF/jsp/</value>
	    </property>
	    <property name="suffix">
	        <value>.jsp</value>
	    </property>
	</bean>
	 
	<!-- Factory bean that creates the Mongo instance -->
	<bean id="mongo" class="org.springframework.data.mongodb.core.MongoFactoryBean">
	    <property name="host" value="localhost" />
	</bean>
	 
	<!-- MongoTemplate for connecting and quering the documents in the database -->
	<bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">
	     <constructor-arg name="mongo" ref="mongo" />
	     <constructor-arg name="databaseName" value="nsdb" />
	</bean>

	<!-- To scan sub interface for MongoRepository -->
	<mongo:repositories base-package="com.ns.spring" />
</beans>

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