hibernate

问题 I am having an issue with mapping a 3rd level entity please consider the following code: Parent Entity : @Entity @Table(name = "Tree") public class Tree { @Id @Column(name="Tree_Id") @GeneratedValue(strategy = GenerationType.Identity) private Integer id; @OneToMany(mappedBy = "parentTree", cascade = CascadeType.ALL, orphanRemoval = true) private Set<Branch> branches; //Getters And Setters public Branch addBranch(Branch branch) { getBranch().add(branch); branch.setTree(this); return branch; }

问题 Hibernate Utils is creating the session factory along with Hikari configuration. Currently we are doing inside @Setup method of ParDo, but it opens way too many connections. So is there any good example to initialize connection pool per worker ? 回答1: If you are using @Setup method inside DoFn to create a database connection keep in mind that Apache Beam would create connection pool per worker instance thread. This might result in a lot of database connections depending on the number of

问题 I am creating my first Spring-Boot-Starter-data-jpa project. I was following a tutorial on that and creating a separate application in same way. When I am starting my Spring Boot application , I am getting org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Invocation of init method failed; nested exception is org

问题 I am creating my first Spring-Boot-Starter-data-jpa project. I was following a tutorial on that and creating a separate application in same way. When I am starting my Spring Boot application , I am getting org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Invocation of init method failed; nested exception is org

问题 I am creating my first Spring-Boot-Starter-data-jpa project. I was following a tutorial on that and creating a separate application in same way. When I am starting my Spring Boot application , I am getting org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Invocation of init method failed; nested exception is org

问题 I don't understand the below behavior: I have a method: @Transactional public void processRejection(final Path path) { try { //some code here } catch (final Exception e) { this.handleException(e)); } } which calls the below which does a saves an entity which doesn't yet exists in the database: void handleException(final Throwable e) { this.filesMonitoringJpaManager.save(someEntityHere); throw new Exception(...) } Now the strange is when I comment the throw new Exception(...) the save works,

问题 I don't understand the below behavior: I have a method: @Transactional public void processRejection(final Path path) { try { //some code here } catch (final Exception e) { this.handleException(e)); } } which calls the below which does a saves an entity which doesn't yet exists in the database: void handleException(final Throwable e) { this.filesMonitoringJpaManager.save(someEntityHere); throw new Exception(...) } Now the strange is when I comment the throw new Exception(...) the save works,

问题 Is it possible to compare LocalDate with LocalDateTime in HQL/JPQL? This is my query of repository method in spring data which should return amount of orders per required dates. The field deliveryDateTime in Order entity has type LocalDateTime . I want to ignore time part and compare only date part. @Query("SELECT new OrderCountPerDate(DATE(o.deliveryDateTime), COUNT(o.id)) FROM Order o WHERE DATE(o.deliveryDateTime) IN :dates GROUP BY DATE(o.deliveryDateTime) ") List<LocalDate>

问题 i have stuck :) does anyone know how query postgresql in jsonb i have table USER INT id, Varchar name, jsonb categoryId the example data in categoryId field like this = [1,2,3,4,5] I have tried this query which works: select * from user where categoryId @> '2'::jsonb ; but how to query with multiple params like select * from user where categoryId @> '1,3,4'::jsonb and i will implement this to hibernate jpa/jpql-predicate, but i want to know native query first Thankyou so much 回答1: In SQL you

问题 I am using Hibernate Script Assert to have a conditional validation: I want to have the error message shown if commRolesId contains 4 and gnrlTransportersId array list is empty. @ScriptAssert(lang="javascript", script="this.commRolesId.indexOf(4) >= 0 && _this.gnrlTransportersId.length == 0", message="{notBlank.message}") public class CommUserDto { @Size(min = 1, message = "{notBlank.message}") private List<Long> commRolesId = new ArrayList<>(); private List<Long> gnrlTransportersId = new