我在QuoteProjection.java
中有这堂课:
package com.mycompany.myapp.query;
import com.mycompany.myapp.command.domain.ProjectedQuote;
import javax.persistence.EntityManager;
public class QuoteProjection {
private final EntityManager entityManager;
.
.
.
public void on(CreateSubmissionEvt evt) {
ProjectedQuote projectedQuote = new ProjectedQuote(evt.getAggregateId(), evt.getJobNumber());
entityManager.persist(projectedQuote); // error reference this line
}
我在ProjectedQuote
中定义了myApi.kt
:
package com.mycompany.myapp.command.domain
@Entity
@NamedQueries(
NamedQuery(name = "ProjectedQuote.fetch",
query = "SELECT q FROM ProjectedQuote q WHERE q.aggregateId LIKE CONCAT(:idStartsWith, '%') ORDER BY q.id"),
NamedQuery(name = "ProjectedQuote.count",
query = "SELECT COUNT(q) FROM ProjectedQuote q WHERE q.aggregateId LIKE CONCAT(:idStartsWith, '%')")
)
data class ProjectedQuote(@Id var aggregateId: String, var jobNumber : String) { constructor() : this("", "") }
运行时,出现以下错误:
java.lang.IllegalArgumentException: Unknown entity:
com.mycompany.myapp.command.domain.ProjectedQuote
at org.hibernate.internal.SessionImpl.firePersist(SessionImpl.java:787) ~hibernate-core-5.2.17.Final.jar!/:5.2.17.Final]
at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:768) ~[hibernate-core-5.2.17.Final.jar!/:5.2.17.Final]
.
.
.
根据下面的Lesiak的回答,我尝试将@EntityScan
添加到应用程序Application.java
中:
package com.mycompany.myapp.query;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.domain.EntityScan;
@SpringBootApplication
@EntityScan(basePackages = {"com.mycompany.myapp.command.domain"})
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
...但是现在我收到以下错误,应用程序终止:
2019-04-16 15:34:54.265 ERROR 4212 --- [ main] o.s.boot.SpringApplication
: Application run failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sagaStore' defined in class path resource [org/axonframework/springboot/autoconfig/JpaAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.axonframework.modelling.saga.repository.jpa.JpaSagaStore]: Factory method 'sagaStore' threw exception; nested exception is java.lang.IllegalArgumentException: org.hibernate.hql.internal.ast.QuerySyntaxException: SagaEntry is not mapped [SELECT new org.axonframework.modelling.saga.repository.jpa.SerializedSaga(se.serializedSaga, se.sagaType, se.revision) FROM SagaEntry se WHERE se.sagaId = :sagaId]
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:590) ~[spring-beans-5.0.9.RELEASE.jar!/:5.0.9.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1247) ~[spring-beans-5.0.9.RELEASE.jar!/:5.0.9.RELEASE]
.
.
.
错误消息中引用的 Sagas是Axon Framework的一部分。因此,通过对我的软件包执行@EntityScan
,看起来好像是它导致它不扫描Axon软件包了吗?
我在头上。任何帮助表示赞赏。
答案 0 :(得分:1)
如何用@Entity
注释课程
例如参见https://docs.jboss.org/hibernate/annotations/3.5/reference/en/html/entity.html#entity-mapping-entity
更新
默认情况下,Spring Boot将启用实体扫描并查看@SpringBootApplication
所在的包(及其子包)。如果您的配置在另一个包中包含实体,请使用@EntityScan
更新2
经过一番调查,事实证明这个问题是针对轴突的。
Axon需要注册自己的实体,例如更新问题中提到的SagaEntry
。
它将这些实体注册在JpaAutoConfiguration中
为此,它使用自己的注释@RegisterDefaultEntities
不幸的是,如果您依靠默认的项目布局(域模型位于包含您的应用的软件包的子软件包中),则它们的配置效果很好,
但不能与@EntityScan
检查问题https://github.com/AxonFramework/AxonFramework/issues/245
我的建议是重新打包您的应用程序(如果您的应用程序是软件包,则将其移至子软件包)并删除@EntityScan
如果您喜欢冒险,可以尝试扫描与使用其自定义注释扫描的软件包相同的软件包,但是我不确定这样做是否成功。