如何使用 spring 引导数据映射 cassandra 中的用户数据类型

Question

我正在寻找与使用 Cassandra 数据库的 spring 引导数据相关的帮助。
我的 pom.xml.

中有以下依赖项

        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-boot-starter-data-cassandra</artifactId>
        </dependency>

        <dependency>
            <groupId>com.datastax.cassandra</groupId>
            <artifactId>cassandra-driver-core</artifactId>
            <version>2.1.10.3</version>
        </dependency>
        <dependency>
            <groupId>com.datastax.cassandra</groupId>
            <artifactId>cassandra-driver-mapping</artifactId>
            <version>2.1.10.3</version>
        </dependency>

The table structure looks like:

@Table(value = "TEST_ORDERS")
public class OrderDTO {

    @PrimaryKey
    @Column(value = "email")
    private String emailId;

    @Column(value = "order_id")
    private int orderId;

    @Column(value = "creation_date")
    private Timestamp creationDate;

    @Column(value = "discount_total")
    private double discountTotal;

    @Column(name = "shipments")
    //This is a UDT type
    private Set<ShippingDetails> shipments;

    //getters and setters here
}

The ShippingDetails object is a UDT with following declartion and i defined as a frozen collection in the cassandra CQL sripts

@UDT(name = "shipping", keyspace = "mc_checkout")
public class ShippingDetails {

    @Field(name = "name")
    private FullName name;

    @Field(name = "quantity_shipped")
    private int quantityShipped;

    @Field(name = "shipping_address")
    private CheckoutAddress shippingAddress; 
    //so on
}

There is a repository created for the basic CRUD operations:
@Repository
public interface OrderRepository extends CrudRepository<OrderDTO, String> {

}

    When i try to invoke findOne API of this repository in my Service class

我得到以下错误： Cassandra 实体必须具有 @Table、@Persistent 或 @PrimaryKeyClass Annotation

Answer 1

Spring Apache Cassandra 的数据和 Datastax 的映射是两个独立的工具，它们试图完成相同的任务。请使用任何一种，但不要混用。

CrudRepository 是 Spring 数据类型，而 @Field 和 @UDT 来自 Datastax 映射。

UDT 对 Spring Apache Cassandra 数据的支持从版本 1.5 开始可用，请参阅 reference docs。 Spring Apache Cassandra 1.5 的数据需要 Datastax Java Driver 3.0 或更新版本。

如何使用 spring 引导数据映射 cassandra 中的用户数据类型

How to map user data type in cassandra using spring boot data

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