How do you perform CRUD operations with Cassandra in Spring Boot?

Table of Contents

• Introduction
• Performing CRUD Operations Using CassandraRepository
  • 1. Create Operation (Insert)
    • Example: Inserting a User
  • 2. Read Operation (Find)
    • Example: Finding a User by ID
  • 3. Update Operation
    • Example: Updating a User's Email
  • 4. Delete Operation
    • Example: Deleting a User by ID
• Performing CRUD Operations Using CassandraTemplate
  • 1. Create Operation (Insert)
  • 2. Read Operation (Find)
  • 3. Update Operation
  • 4. Delete Operation
• Conclusion

Introduction

In a Spring Boot application integrated with Apache Cassandra, performing CRUD (Create, Read, Update, and Delete) operations is a fundamental task. Spring Data Cassandra offers two main ways to handle CRUD operations: using CassandraRepository and CassandraTemplate. While CassandraRepository is more suited for simple use cases and follows the repository pattern, CassandraTemplate provides a more flexible approach for advanced operations. This guide explains how to perform basic CRUD operations with both methods in a Spring Boot application.

Performing CRUD Operations Using CassandraRepository

1. Create Operation (Insert)

To create (insert) a new record into Cassandra, you can use the save method provided by the CassandraRepository. This method inserts the entity into the database.

Example: Inserting a User

In this example:

• The save method automatically inserts a new User object into Cassandra.

2. Read Operation (Find)

To read (find) data from Cassandra, you can use methods like findById or custom query methods in CassandraRepository.

Example: Finding a User by ID

In this example:

• The findById method retrieves a user by their ID from the Cassandra database.

3. Update Operation

To update a record, you can modify the entity and then use the save method. If the entity already exists, save will update it.

Example: Updating a User's Email

In this example:

• The save method updates the existing User entity in Cassandra by modifying the email field.

4. Delete Operation

To delete a record from Cassandra, use the deleteById or delete method.

Example: Deleting a User by ID

In this example:

• The deleteById method deletes the user with the specified ID from Cassandra.

Performing CRUD Operations Using CassandraTemplate

While CassandraRepository is sufficient for basic CRUD operations, CassandraTemplate provides more flexibility for advanced queries.

1. Create Operation (Insert)

In this example:

• The insert method inserts a new User entity into Cassandra.

2. Read Operation (Find)

In this example:

• The selectOne method retrieves a single user by their ID from Cassandra.

3. Update Operation

In this example:

• The update method is used to update the User entity's email in Cassandra.

4. Delete Operation

In this example:

• The delete method removes a User entity from Cassandra.

Conclusion

Performing CRUD operations in a Spring Boot application with Cassandra can be easily achieved using either CassandraRepository or CassandraTemplate. The CassandraRepository is ideal for simple cases, leveraging Spring Data's built-in functionality, while CassandraTemplate provides greater flexibility and control, especially for custom queries and advanced data manipulation. Both approaches allow developers to seamlessly interact with Cassandra, making it easier to manage NoSQL data in Spring Boot applications.