jpa

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JPA monitor for persistence context

How convinion deb开发者_如何转开发ug state of persistence context, watch result of queries, monitor all entities?[详细]

2023-04-08 14:44 分类：问答
persistence.xml cache property warning

I\'m using eclipse indigo for EE developement to develop an SE project, just to take benefit from the JPA project support.[详细]

2023-04-08 11:15 分类：问答
JPA Nullable JoinColumn

I have an entity: public class Foo { @Id @GeneratedValue private Long id; private String username; @ManyToOne(cascade = { CascadeType.MERGE }, fetch = FetchType.LAZY, optional = true)[详细]

2023-04-08 09:55 分类：问答
Best way to implement a keyword search from a MySQL CLOB or VARCHAR column

I have to implement 开发者_StackOverflowa keyword search from a CLOB column in my MySQL / JPA project.[详细]

2023-04-08 08:20 分类：问答
Hibernate/JPA persistence.xml leads to SAXParseException when deploying to Jetty as WAR

I\'m having trouble getting an application running on Jetty. If I run the app using the maven jetty plugin i.e.[详细]

2023-04-08 06:10 分类：问答
LazyInitializationException with OneToMany in the simpliest way

I\'m using Hibernate with jpa and I\'m getting LazyInizializationException trying to do a very simple thing. I know what does LazyInizializationException means but I can\'t understand why it comes whi[详细]

2023-04-08 04:45 分类：问答
How to get a JPA-persisted String[] column by ResultSet#getString() in JDBC?

I want to store multiple checkbox values in a single DB column. I don\'t want to store in a seperate table with @OneToMany.[详细]

2023-04-08 01:17 分类：问答
How can I determine why JPA/eclipselink/J2EE is issuing a ROLLBACK to the DB?

I am chasing a problem where I see SQL statements run in my database log in a transaction, then see that transaction rolledback.[详细]

2023-04-08 00:11 分类：问答
Bean Validation constraint(s) violated while executing Automatic Bean Validation on callback event: 'prePersist'

I created an EJB Session facade in my Netbeans 7 for saving my entity. I have a manytoone mapping between myInsurance and开发者_如何学编程 RatePlan Class.[详细]

2023-04-07 23:46 分类：问答
Delete OneToOne relationship

We have the following mapping: @Entity public class A { private B b; @OneToOne public B getB() { return b; }[详细]

2023-04-07 16:59 分类：问答