SpringBoot using MongoDB

Prerequisites

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Getting Started

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• Follow the same steps listed in the link above
• Do NOT use MySQL dependency
• Replace Spring Data JPA dependency w/ Spring Data MongoDB
• Download MongoDB: https://www.mongodb.com/try/download/enterprise
• For online MongoDB clusters, go to: https://account.mongodb.com/account/login

Dependencies

<!-- For REST API/web functionality   -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

<!-- Needed to connect to MongoDB (causes conflict w/ Spring Data JPA)   -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-mongodb</artifactId>
    </dependency>
    
<!-- Reduce boiler plate code-->
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <optional>true</optional>
    </dependency>

Important Annotations

API

• Click here

DTO

• Click here

Entity

// Class Based
@Data // constructor, getters, setters, equals, hashCode, toString 
@Document // represents class as MongoDB document

// Field Based
@Id // primary key

Repository

• none

Service

• Click here

• @Transactional does not work w/ MongoDB. To update a document, you have to set the field and call save(E e)

Utility

• Click here

Repository Layer

public interface ExampleRepository extends MongoRepository<ENTITY, ID>
{
    // methods inherited from MongoRepository
}