hibernate

问题 I recently switched to Apache log4j2, and still can not find a way to configure hibernate logging using log4j2.xml. Because I can not find a way around this problem I still use log4j.properties file explicitly for hibernate. This is not the best solution since my log4j2.xml uses JPA appender (writes logs to db). I do not want to write separate logic for hibernate. Is there a way to configure hibernate logging using log4j2? 回答1: As suggested in https://issues.apache.org/jira/browse/LOG4J2-172

问题 I recently switched to Apache log4j2, and still can not find a way to configure hibernate logging using log4j2.xml. Because I can not find a way around this problem I still use log4j.properties file explicitly for hibernate. This is not the best solution since my log4j2.xml uses JPA appender (writes logs to db). I do not want to write separate logic for hibernate. Is there a way to configure hibernate logging using log4j2? 回答1: As suggested in https://issues.apache.org/jira/browse/LOG4J2-172

问题 I recently switched to Apache log4j2, and still can not find a way to configure hibernate logging using log4j2.xml. Because I can not find a way around this problem I still use log4j.properties file explicitly for hibernate. This is not the best solution since my log4j2.xml uses JPA appender (writes logs to db). I do not want to write separate logic for hibernate. Is there a way to configure hibernate logging using log4j2? 回答1: As suggested in https://issues.apache.org/jira/browse/LOG4J2-172

问题 I seem to be getting this error and have no idea why I'm getting this error. I don't even understand why Hibernate needs that getter for the User class because it's not supposed to be doing any actions with that class directly anyway... 2012-12-30 09:38:56,713 [main] ERROR org.hibernate.property.BasicPropertyAccessor$BasicGetter - HHH000122: IllegalArgumentException in class: com.nortal.pirs.datamodel.User, getter method of property: idUser 2012-12-30 09:38:56,714 [main] ERROR com.nortal.pirs

问题 i am start using this 2 hibernate annotations in my APP. @DynamicUpdate(value=true) @SelectBeforeUpdate(value=true) first i will try to explain what i understand about it to know if i am right about it. @DynamicUpdate(value=true) updates only the modified values in the entity Hibernate needs to track those changes @SelectBeforeUpdate(value=true) creates a select before update to know which properties has been changed this is useful when the entity has been loaded and updated on different

问题 I am trying to figure out how to resolve the issue which I am having now. I have three entities, Company, User and Affiliation. The Affiliation table is a link table for ManyToMany relationship between Company and User entities and has extra columns which I need to use. On company side I have: @JsonManagedReference @OneToMany(mappedBy = "company", cascade = CascadeType.ALL, orphanRemoval = true) private Set<Affiliation> affiliations = new HashSet<>(); On User side I have:

问题 @Id @GeneratedValue(strategy = GenerationType.AUTO) private int color_id; the above generates a automatic incremented number like 1,2,3,4,5,6. But when we delete record with 6 , the next generated number is 7. but i want next generated number to be 6. what should i do? i need auto increment to continue from 6,7 itself not 7,8 is there any way? 回答1: What autogeneration guarantee is only unicity of the key. And that's all you should need. There are even cases where autogeneration gives a bunch

问题 Im trying to login from a jsp page, using a loginServlet. It redirects to the servlet, but it doesn't make the authentication and throws an error. Here is the code: JSP file: <div class="container"> <div class="row"> <div class="box"> <div class="col-md-6 col-md-offset-4"> <h2 class="intro-text">Welcome! Login here:</h2> <form class="form-horizontal" action="LoginServlet" method="POST"> <div class="form-group"> <label class="control-label col-sm-2" for="username">Username:</label> <div class=

问题 I imagine that this is a common problem, but after some searching I wasn't able to find anything relevant. The problem I'm having is that I'm getting a No Hibernate Session bound to thread exception when annotating my resource method with @UnitOfWork and inside my resource method, making an asynchronous DAO call. The idea behind this design is to make the database call on a separate I/O thread so that it frees up the Jersey resource thread. Unfortunately, as the exception says, this

问题 I imagine that this is a common problem, but after some searching I wasn't able to find anything relevant. The problem I'm having is that I'm getting a No Hibernate Session bound to thread exception when annotating my resource method with @UnitOfWork and inside my resource method, making an asynchronous DAO call. The idea behind this design is to make the database call on a separate I/O thread so that it frees up the Jersey resource thread. Unfortunately, as the exception says, this