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Hibernate error
org.hibernate.HibernateException: could not instantiate QueryTranslatorFactory: org.hibernate.hql.classic.ClassicQueryTransactionFactory at org.hibernate.cfg.SettingsFactory.createQueryTranslatorFactory(SettingsFactory.java:391) at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:222) at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2009) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1292) at...
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What is the difference between hibernate and Spring
mani.sivapuram
- Feb 21st, 2011
Hibernate is used to interact with database.i.e if we want to save some data then we use hibernate or jdbc or some other tools available in the market.But it is not possible for struts or spring to st...
srini
- May 3rd, 2007
Hibernate is ORM tool used for data persistency.Spring is a framework for enterprise applications?with default APIs for presentation, middle tiers and presistence layers and allows to integrate with ...
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What is Hibernate proxy?
arindam_0006in
- May 19th, 2008
Proxies are created dynamically by subclassing your object at runtime. The subclass has all the methods of the parent, and when any of the methods are accessed, the proxy loads up the real object from...
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What J2EE design problems does Hibernate solves apart from Data Base in-dependency and being an ORM tool?
mani.sivapuram
- Feb 14th, 2011
Since in case of jdbc autocommit is always true but in case of hibernate after executing all the sql statements only it process the commit operation this is called as transaction management.But this t...
prashant82
- Jun 24th, 2009
In hibernate objects are loosely coupled providing flexibility during integration with other databases or applicationsIn J2EE inheritance can not be achieved directly for the objects mapping One-to-one mapping is mandatory in J2EE
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I am using hibernate.What is the use In Data(POJO) class primary key is sending as an argument with constructor?
mani.sivapuram
- Feb 14th, 2011
since according to the hibernate specifications hbm file is configured in such a way that one primary key shoud be configured in id tag of hbm file.and other properties are configured in property tags...
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What is lazy fetching in hibernate
mani.sivapuram
- Feb 14th, 2011
Lazy fetching means for example in hibernate if we use load() method then load() is lazy fetching i.e it is not going to touch the database until we write empobject.getString("eno");So when we write a...
Karuna Reddy
- Aug 22nd, 2008
Lazy loading is the responsibility is that to load the objects for its parentIn mapping file, if
you want to load the child objects while loading the parent it will wont load coz by default load = trueso
you have to specify lazy = falsehere child class become parent while loading the objects. -
Execute Stored procedure in Hibernate
How to invoke a stored procedure in Hibernate and pass in a parameter?I have { ? = call myservice.TEST_PROC3( ? ) }While I can get stored proc output if there is no input to TEST_PROC3, e.g. call myservice.TEST_PROC3( )I don't know how to code in Java to pass in the parameter required in my case with:call myservice.TEST_PROC3( ? )Can anyone show me how to make such call in Java?Thanks
LendingHand
- Jun 3rd, 2008
You can declare it as Named queiries in one of your mapping files and give unique name.Call it in your code. Sample code is below.SQLQuery sq = (SQLQuery) session.getNamedQuery("findSearchResults...
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Level 2 Cache and Query Cache
What will happened if level 2 cache is enable and query cache is diabled in Hibernate?
sowdri
- Jan 29th, 2011
Query cache depends on L2 cache. L2 cache does not depend on query cache. So nothing would happen. Alternatively: What will happened if level 2 cache is disabled and query cache is enabled in ...
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Fetching Strategies
What are different fetching strategies in hibernate?
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What is different between Hibernate and iBatis?
uday.dandu
- Jul 27th, 2010
In iBatis Java objects are mapped to the result sets. IBatis only maps the Java bean properties to database fields, and it fetches the database results in the form of Java beans based on configur...
dhandabani.j
- Jan 22nd, 2009
These are the few questions that continuously get asked in most of forums. Whats really difference between two and really more importantly when should I use one over the other. Its pretty intere...
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What are the types of inheritence models and describe how they work like vertical inheritence and horizontal
AjaySinghBhati
- Apr 30th, 2010
There are three types of inheritance mapping in hibernate1. Table per class hierarchy2. Table per subclass3. Table per concrete class In hbm.xml file you need following enteries1. For T...
Jaleel Akbar
- Jul 12th, 2007
Table per concrete class using implicitpolymorphism can also be added as inheritance mapping in hibernate
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How do i call the the Stored procedure using Hibernate?
tecfinder
- Mar 26th, 2010
There are two ways you can call stored procedure in hibernate1) session.connection() will give you jdbc connection which you can use it to call callablestatement which you normally do in JDBC. Here yo...
Hur Muhammad
- Mar 10th, 2008
You can use callableStatement to call any procedure from the Hibernate but i prefer to use iBatis instead of Hibernate for performing these type of actions.
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How will handle Hibernate the situation,
If the data base does not contain any primary key?i.e we had a table that does not contain key .but we map the all the fields to properties of class.
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Connect Two Database
How to connect two database in one application using hibernate?
awasie
- Jan 21st, 2010
You have to create two different cfg files.for exampledb1.cfg.xmldb2.cfg.xmlConfiguring for different database.for db1.cfg.xmlpublic class HibernateSessionFactory { private static St...
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Lazy initialisation
What is lazy initialisation in hibernate
sambitsahu
- Jan 6th, 2010
It decides whether the child object is loading to the parent or not.--> We have to set it in the mapping file of the parent class.If lazy="true" (means not to load child)-->By default ...
inder_gwl
- Sep 25th, 2009
Lazy loading means that any foreign key references that you have in your table will be loaded only when referred to by the application. Eager loading means everything will be loaded at once.
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Hibernate Persistent technology
Can anybody tell me which persistent technology can be used instead of Hibernate which is as compatible as Hibernate (not JDBC nor EJB) any parallel technology?
shaileshrit
- Sep 2nd, 2009
There is a alternate option which I have used in past. It is little different though. This is not a ORM tool, but it greatly helps in Database persistence. This is code generation utility which ge...
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Why Hibernate came in to picture
Anybody tell me please, where exactly Hibernate is used..tell me about the mapping and .xml file in Hibernate
madhusudan_ds
- Aug 25th, 2009
I think the answers above are a sufficient reason to understand, why hibernate? But don't get confused, when we are drawing comparisions between EJBs and Hibernate. They are not actually parallel ...
srinathvaralakshmi
- Jul 14th, 2009
The reasons are plenty,weighing in favor of Hibernate clearly. -Cost effective.Just imagine when you are using EJBs instead of Hibernate.One has to invest in Application Server(Websphere,Weblogic e...
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Why Hibernate is advantageous over Entity Beans & JDBC?
kamalraja
- Aug 13th, 2009
Hibernate does not require a Application Server to be deployed. Easy plugin into any available project or module when compared to EJBHibenate involves less coding and easy to manage code when compared to JDBC.
Nirwana360
- Aug 9th, 2009
EJB3 and Hibernate both support JPA. Advantage of Hibernate over EJB3 Entity are as follows; EJB3 Entity needs a container to run where as Hibernator does not need one. Hibernate support Java ann...
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ORM Tools
Why Hibernate is more effective over other ORM tools like ibatis, TOPlink?
Hibernate Interview Questions
Ans