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What is MongoRepository in spring?

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What is MongoRepository in spring?

MongoDB is a document-based NoSQL database, providing high performance and high availability. Spring provides seamless integration with the Mongo database through Spring Data MongoDB which is a part of Spring Data project.

Is MongoRepository an interface?

MongoRepository extends the PagingAndSortingRepository and QueryByExampleExecutor interfaces that further extend the CrudRepository interface. MongoRepository provides all the necessary methods which help to create a CRUD application and it also supports the custom derived query methods.

How do I use MongoRepository in spring boot?

6. Using MongoRepository

  1. 6.1. Insert. First, we’ll see the state of the database before running the insert: { }
  2. 6.2. Save – Insert. Similarly, save works the same as the save operation in the MongoTemplate API.
  3. 6.3. Save – Update.
  4. 6.4. Delete.
  5. 6.5. FindOne.
  6. 6.6. Exists.
  7. 6.7. FindAll With Sort.
  8. 6.8. FindAll With Pageable.

How does MongoDB use spring data?

Starting with Spring Initializr

  1. Choose either Gradle or Maven and the language you want to use. This guide assumes that you chose Java.
  2. Click Dependencies and select Spring Data MongoDB.
  3. Click Generate.
  4. Download the resulting ZIP file, which is an archive of a web application that is configured with your choices.

What is @RequestMapping and @GetMapping?

@RequestMapping is used at the class level while @GetMapping is used to connect the methods. This is also an important Spring MVC interview question to knowing how and when to use both RequestMapping and GetMapping is crucial for Java developers.

Which is better MongoRepository or MongoTemplate?

So I’d say that MongoTemplate is a better option, unless you have a very elaborated POJO model or need the custom queries capabilities of MongoRepository for some reason. Good points/examples. However your race condition example and undesired result can be avoided using @Version to prevent that very scenario.

Can we use MongoDB with spring boot?

Spring Boot creates quick production-ready applications. MongoDB and Spring Boot interact using the MongoTemplate class and MongoRepository interface. MongoTemplate — MongoTemplate implements a set of ready-to-use APIs.

When should I use MongoDB?

NoSQL databases like MongoDB are a good choice when your data is document-centric and doesn’t fit well into the schema of a relational database, when you need to accommodate massive scale, when you are rapidly prototyping, and a few other use cases.

How does MongoDB integrate with Spring?

Through this article, we demonstrated that MongoDB Spring Boot integration is easy using:

  1. Starter data MongoDB artifactid (the dependency we added while creating the Spring Initializr project) in pom. xml.
  2. A property on application. properties file to specify the connection string to a MongoDB cluster.

How to extend mongorepository in spring data?

We simply have created an interface EmployeeRepository which in turn extends MongoRepository that’s all we have to do Spring Data will automatically create an implementation in the runtime. MongoRepository will by default provide you with the generic methods like save (), findAll (), insert (), etc..

What is mongorepository in MongoDB?

MongoRepository extends the PagingAndSortingRepository and QueryByExampleExecutor interfaces that further extends the CrudRepository interface. MongoRepository provides all the necessary methods which help to create a CRUD application and it also supports the custom derived query methods.

What is the difference between mongotemplate and spring repository?

The MongoTemplate follows the standard template pattern in Spring and provides a ready to go, basic API to the underlying persistence engine. The repository follows the Spring Data-centric approach and comes with more flexible and complex API operations, based on the well-known access patterns in all Spring Data projects.

What is the use of mongotemplate in spring data MongoDB?

MongoTemplate – MongoTemplate provides the Out-of-the-box methods to Spring Data MongoDB, we just need to pass the mongoDbFactory instance which we have created above. MongoRepository behind scenes uses the MongoTemplate to query the Mongo database.