Spring KafkaListener使用Hibernate一对一单向映射失败
我使用Spring数据JPA在Hibernate中建模了一对一关系。以下是我的模型:Spring KafkaListener使用Hibernate一对一单向映射失败,spring,hibernate,apache-kafka,spring-data-jpa,Spring,Hibernate,Apache Kafka,Spring Data Jpa,我使用Spring数据JPA在Hibernate中建模了一对一关系。以下是我的模型: import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; import javax.persistence.Table
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
import lombok.Data;
import org.hibernate.annotations.GenericGenerator;
import org.hibernate.annotations.Nationalized;
import org.hibernate.annotations.Parameter;
@Data
@Entity
@Table(name = "parent")
public class Parent
{
@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "seq-gen")
@GenericGenerator(name = "seq-gen", strategy = "org.hibernate.id.enhanced.SequenceStyleGenerator", parameters = { @Parameter(name = "sequence_name", value = "test_seq") })
@Column(name = "id")
private Long id;
@Nationalized
@Column(name = "Name", length = 50, nullable = false)
private String name;
}
子表与父表具有外键关系,父表本身使用
@MapsId
映射到子表的主键。请注意,这是一种单向关系
我使用SpringDataJPA的JpaRepository
将对象持久化到数据库中
public interface ParentRepository extends JpaRepository<Parent, Long>{}
我创建了一个RESTful控制器,它有一个自动连接的ServiceImpl
对象,它调用服务类的适当方法
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class ControllerRestful
{
@Autowired
private ServiceImpl service;
@PostMapping(value = "/test")
@ResponseStatus(HttpStatus.OK)
public void create(@RequestBody UserDTO dto)
{
System.out.println(dto);
service.create();
System.out.println("Done");
}
}
请注意,服务类独立于控制器。我在本地测试了这个端点,它将父对象和子对象持久化到数据库中
public interface ParentRepository extends JpaRepository<Parent, Long>{}
现在,当我切换到基于卡夫卡的控制器时,它在持久化时抛出一个错误
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.kafka.annotation.KafkaListener;
import org.springframework.kafka.support.Acknowledgment;
import org.springframework.messaging.handler.annotation.SendTo;
import org.springframework.stereotype.Controller;
@Controller
public class ControllerKafka
{
@Autowired
private ServiceImpl service;
@KafkaListener(topics = "..", groupId = "..")
@SendTo
public void create(UserDTO dto, Acknowledgment acknowledgment)
{
service.create();
System.out.println("Done");
acknowledgment.acknowledge();
}
}
错误日志:
org.springframework.kafka.listener.ListenerExecutionFailedException: Listener method 'public void ControllerKafka.create(UserDTO,org.springframework.kafka.support.Acknowledgment)' threw exception;
nested exception is org.springframework.dao.InvalidDataAccessApiUsageException: detached entity passed to persist: models.Parent;
nested exception is org.hibernate.PersistentObjectException: detached entity passed to persist: models.Parent;
nested exception is org.springframework.dao.InvalidDataAccessApiUsageException: detached entity passed to persist: models.Parent;
nested exception is org.hibernate.PersistentObjectException: detached entity passed to persist: models.Parent
at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.decorateException(KafkaMessageListenerContainer.java:1899) ~[spring-kafka-2.5.2.RELEASE.jar:2.5.2.RELEASE]
at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeErrorHandler(KafkaMessageListenerContainer.java:1887) ~[spring-kafka-2.5.2.RELEASE.jar:2.5.2.RELEASE]
at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.doInvokeRecordListener(KafkaMessageListenerContainer.java:1792) ~[spring-kafka-2.5.2.RELEASE.jar:2.5.2.RELEASE]
at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.doInvokeWithRecords(KafkaMessageListenerContainer.java:1719) ~[spring-kafka-2.5.2.RELEASE.jar:2.5.2.RELEASE]
at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeRecordListener(KafkaMessageListenerContainer.java:1617) ~[spring-kafka-2.5.2.RELEASE.jar:2.5.2.RELEASE]
at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeListener(KafkaMessageListenerContainer.java:1348) ~[spring-kafka-2.5.2.RELEASE.jar:2.5.2.RELEASE]
at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.pollAndInvoke(KafkaMessageListenerContainer.java:1064) ~[spring-kafka-2.5.2.RELEASE.jar:2.5.2.RELEASE]
at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.run(KafkaMessageListenerContainer.java:972) ~[spring-kafka-2.5.2.RELEASE.jar:2.5.2.RELEASE]
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) ~[na:na]
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[na:na]
at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]
在
ControllerKafka
而不是ControllerRestful
的情况下,在serviceinpl
中持久化Child
对象怎么可能失败?另外,如果我从子实体中删除@MapsId
属性,并且对子实体具有不同的主键和外键,则在持久化时不会出现错误。在创建()
方法上使用@Transactional
,删除@MapsId
@zlaval如果我删除@MapsId
是否有更好的方法来建模主键=外键的实体?使用@Transactional
它工作正常,我不确定这是如何发生的。没有@Transactional
,如果我在childRepository.save(child)
中添加调试检查点并检查数据库,Hibernate已经持久化了父对象
对象,然后当我从检查点恢复并持久化子对象时,它失败了。(另外,如果我在从检查点恢复之前突然关闭程序,它不会回滚)。另外,为什么使用@RestController
,不需要添加@Transactional
?使用onetoone,子对象的fk将是父对象pk。如果不使用Transactional,则两个保存方法将获得不同的EntityManager。因此,在第一次保存后,保存的实体将被弃用。请在create()上使用@Transactional
)
方法,并删除@MapsId
@zlaval如果我删除@MapsId
是否有更好的方法对主键=外键的实体建模?使用@Transactional
它工作正常,我不确定这是如何发生的。如果没有@Transactional
,如果我在childRepository.save(child)添加调试检查点
我检查了数据库,Hibernate已经保存了父对象
对象,然后当我从检查点恢复并保存子对象时,它失败了。(另外,如果我在从检查点恢复前突然关闭程序,它不会回滚)。另外,为什么使用@RestController
,不需要添加@Transactional
?使用onetoone,子对象的fk将是父对象pk。如果不使用Transactional,则两个保存方法将获得不同的EntityManager。因此,在第一次保存后,保存的实体将被弃用。
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.kafka.annotation.KafkaListener;
import org.springframework.kafka.support.Acknowledgment;
import org.springframework.messaging.handler.annotation.SendTo;
import org.springframework.stereotype.Controller;
@Controller
public class ControllerKafka
{
@Autowired
private ServiceImpl service;
@KafkaListener(topics = "..", groupId = "..")
@SendTo
public void create(UserDTO dto, Acknowledgment acknowledgment)
{
service.create();
System.out.println("Done");
acknowledgment.acknowledge();
}
}
org.springframework.kafka.listener.ListenerExecutionFailedException: Listener method 'public void ControllerKafka.create(UserDTO,org.springframework.kafka.support.Acknowledgment)' threw exception;
nested exception is org.springframework.dao.InvalidDataAccessApiUsageException: detached entity passed to persist: models.Parent;
nested exception is org.hibernate.PersistentObjectException: detached entity passed to persist: models.Parent;
nested exception is org.springframework.dao.InvalidDataAccessApiUsageException: detached entity passed to persist: models.Parent;
nested exception is org.hibernate.PersistentObjectException: detached entity passed to persist: models.Parent
at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.decorateException(KafkaMessageListenerContainer.java:1899) ~[spring-kafka-2.5.2.RELEASE.jar:2.5.2.RELEASE]
at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeErrorHandler(KafkaMessageListenerContainer.java:1887) ~[spring-kafka-2.5.2.RELEASE.jar:2.5.2.RELEASE]
at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.doInvokeRecordListener(KafkaMessageListenerContainer.java:1792) ~[spring-kafka-2.5.2.RELEASE.jar:2.5.2.RELEASE]
at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.doInvokeWithRecords(KafkaMessageListenerContainer.java:1719) ~[spring-kafka-2.5.2.RELEASE.jar:2.5.2.RELEASE]
at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeRecordListener(KafkaMessageListenerContainer.java:1617) ~[spring-kafka-2.5.2.RELEASE.jar:2.5.2.RELEASE]
at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeListener(KafkaMessageListenerContainer.java:1348) ~[spring-kafka-2.5.2.RELEASE.jar:2.5.2.RELEASE]
at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.pollAndInvoke(KafkaMessageListenerContainer.java:1064) ~[spring-kafka-2.5.2.RELEASE.jar:2.5.2.RELEASE]
at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.run(KafkaMessageListenerContainer.java:972) ~[spring-kafka-2.5.2.RELEASE.jar:2.5.2.RELEASE]
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) ~[na:na]
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[na:na]
at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]