I am trying to insert 100,000 rows in a MYSQL table under 5 seconds using Hibernate(JPA). I have tried every trick hibernate offers and still can not do better than 35 seconds. 1st optimisation : I started with IDENTITY sequence generator which was resulting in 60 seconds to insert. I later abandoned the sequ…
Tag: hibernate
Which collections are supported by Hibernate @ManyToMany annotation
I used @ManyToMany annotation on a Set and it worked fine. When I used ArrayList instead of Set it throws exception: org.hibernate.AnnotationException: Illegal attempt to map a non collection as a @OneToMany, @ManyToMany or @CollectionOfElements: com.kaushik.winnersoft.data.Student.enrolledCourses Is ArrayLis…
org.hibernate.QueryException: JPA-style positional param was not an integral ordinal
I have the following JPQL request; But it prints following error: What the reason of my problem? Answer You have no whitespace between lines also check that the ?3 param is not empty list
How to create a generic DAO for CRUD methods
I’m trying to create a generic DAO for the basic CRUD methods so that I can reuse the code, but I really have no clue how to start. I already have a DAO for every class, and they work perfectly. I read lots of tutorial, and downloaded projects, but I can’t adapt (or understand) it to my program. H…
Hibernate Validator: Violation Message Language
I have a test class where I am testing a domain model which is annotated with e.g. @NotNull In my test class I am first getting the validator Later I have a JUnit Test where I am testing the domain model (lets say a Person) Lets say, I want to retrieve the first violation Message I do: I haven’t set
invalid column name in namedNativeQuery in spring-hibernate-jpa
I have very simple Entity class and two native query in it . QUERY1 is run right and return PersonEntity , but the QUERY2 return exception (invalid column name !!! but my column name is exactly this) ; MY ENTITY CLASS : DAO CLASS : EXCEPTION : Table Describe Answer The problem is that your second query return…
Hibernate upgrade to 5.2 – Session Factory creation and replacing PersistentClass for getting entity class properties
I am currently upgrading my Hibernate version to the latest version 5.2.10. I replaced my code in the HibernateUtil for the SessionFactory creation. 4.3.11.Final (Previous): 5.2.10 Final (New): Now I have a method which would fetch me the list of column names by passing the DB table name as a string. I did it…
How to reset Hibernate sequence generators?
I’m using Hibernate 3.5.6-Final with an Oracle database for production and a H2 database for integration tests. The Hibernate mapping for ID creation looks like this with every entity extending EasyPersistentObject: Before each JUnit integration test I am removing all data from the database with Everyth…
Where can I find documentation for Hibernate’s legacy hbm.xml mapping files?
I have joined a new team, and their project is using pretty much exclusively legacy-style Hibernate Mapping files (*.hbm.xml) for their Hibernate set-up. The current documentation pretty much seems to restrict itself to mention that Hibernate still supports hbm files and that they will take precedence over an…
Java Hibernate @SafeHtml not allows url links
I need to have XSS filter in my textfield, but i need to allow certain html tags for text formatting (bold, italic, etc), and i also need to allow url links like: So in my entity class i added whitelist: But it still gives me the following error: Answer You have two problems one is that style attribute is not