Oracle 10g with hibernate
Hello iam trying to use hibernate with oracle10g for the first time i get some problems Here is my entity class Code: package com.oracleconnect; import javax.persistence.Entity; public class...
View Article"automatically" DAO
Hi, I don't know if it's possible, and if yes, how can I do it... I'm developing a web app using JAVA and Hibernate. To any Class I must have a DAO. Question: Can I have only one DAO to all classes ?...
View ArticleHow to avoid lazy="false" in hibernate
Team, My existing developers are set lazy="false" and worked lot. Now I am facing performance issue. It is fetching all child objects. Without changing my existing hbm files Is there any way to avoid...
View ArticleIs it possible two hibernate.mppaing.xml in a application with same databse?
Team, I have some performance issues because of my existing hbm file. I enabled lazy="false" in most of the place. So, I am getting child objects and it is performance issue. Tell it is possible, Can i...
View ArticleHibernate returns list of nulls although executed SQL returns values
Hi everyone, I have a problem with hibernate (I also asked this on SO). I'm using hibernate as an ORMapper and I want to execute an actually rather simple hql query: Code: SELECT a FROM Foo a WHERE...
View ArticleHibernate not creating tables
Hello, I'm using Hibernate to create mysql tables automatically within a maven JBoss project. When I deploy I get this info msg: 13:48:24,415 INFO [org.hibernate.cfg.Environment] (MSC service thread...
View ArticleDoes performance issue for each request getting the session and close the...
Team, I need a clarification about session performance. I have created session pool(LocalSessionFactoryBean). I mean for each thread request I am getting a session(not created new one) from pool. For...
View ArticleAdvantage of HQL over SQL?
As the subject line says. Telling that we have advantage of using shortened form of query when we retrieve all columns from a table is just too small a reason to have and use HQL. HQL query: Code: From...
View Articlea hibernate commit() question
if let's say i have a User user and i have a Session sesh and i do Code: sesh.save(user); sesh.commit(); sesh.commit(); the question is what will the second commit do ? will it enter that same user...
View ArticlemappedBy and joinColumn
Hi, I am looking at Hibernate annotation tutorial for the different mappings like 1-1, 1-Many and so on. I see some of the tutorials focus on explaining the terms and go on explaining about...
View ArticleComposite foreign key issue
I am getting this error :- org.hibernate.MappingException: Foreign key must have same number of columns as the referenced primary key This error seems to be very common and many people seem to have...
View Articlenewbie need help with query result in List
Hi all, i am just restarting with java and i have an issue with this function in the APP.java i found this code on many examples on internet but for me is not working can someone help me find out what...
View ArticleHibernate-Cannot Save The Child
Hello I have a problem -I jave many to one relation in database and I can't save many side. I was trying to found out solution,but I didn't find... Code: //OneToMany...
View ArticleHibenate fetching process RAM vs CPU
For hibernate cache and query what is the role of RAM and CPU Processor? Object Cache - heap memory in RAM Query processing - CPU(Processor)(Using CPC cache) Corerect me if I wrong?
View ArticleHow hibernate get() and load() will work when query 2nd time
How hibernate get() and load() will work when query second times? Please correct me get() -> 1) Check 1st Level Cache and 2) DB hit load() -> 1) Check 1st Level Cache 2) Then 2nd Level Cache Then...
View ArticleHow the hibernate fetch the peristent object from cache(1/2)
How the hibernate API fetch the peristent object from cache second time ( 1st leve and 2 nd Level). I know, first request fetched from database and give the peristent object and also put into 1st level...
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