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Spring Data: Bridging Multiple Databases

Auditing

Learn about Spring Data Cassandra’s auditing feature.

We'll cover the following...

The auditing feature in Spring Data Cassandra automatically tracks and maintains metadata about data changes, including creation, modification, and deletion. It enhances data governance, traceability, and accountability in Cassandra-based applications, simplifying the implementation of audit trails.

Auditing metadata in the entity classes

First, let’s add a few properties in the POJOs that map the auditing metadata field in the database.

The Book entity

Let’s add properties like createdBy, dateCreated, updatedBy, and dateUpdated to the Book class. The underlying Spring Data Cassandra will take care of updating the database with the corresponding fields in the book table.

Java
package com.smartdiscover.model;
import lombok.Data;
import org.springframework.data.annotation.CreatedBy;
import org.springframework.data.annotation.CreatedDate;
import org.springframework.data.annotation.LastModifiedBy;
import org.springframework.data.annotation.LastModifiedDate;
import org.springframework.data.cassandra.core.mapping.Column;
import org.springframework.data.cassandra.core.mapping.PrimaryKey;
import org.springframework.data.cassandra.core.mapping.Table;
import java.util.Date;
import java.util.UUID;
@Data
@Table
public class Book {
    @PrimaryKey
    private UUID id;
    @Column
    private String name;
    @Column
    private String summary;
    @CreatedBy
    private String createdBy;
    @CreatedDate
    private Date dateCreated;
    @LastModifiedBy
    private String updatedBy;
    @LastModifiedDate
    private Date dateUpdated;
    @Override
    public String toString() {
        return "Book{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", summary='" + summary + '\'' +
                ", createdBy='" + createdBy + '\'' +
                ", dateCreated='" + dateCreated + '\'' +
                ", updatedBy='" + updatedBy + '\'' +
                ", dateUpdated='" + dateUpdated +
                '}';
    }
}

Here, we use the Spring Data annotations over the ...