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what is difference between session.clear and evict methods in hibernate.Both are detatched objects that is instance removed from session.when should i use session.clear and session.evict in hibernate.
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The Session. evict() is used to remove a particular object from the cache associated with the session. Clearly, the evict() method removed the student object from the cache so that it was fetched again from the database.
evict(obj) will remove the object instance from the session cache. Therefore if you are saving the object for the first time, you will have to explicitly commit via session. save(obj) before evicting the object from the cache. Subsequent update calls should follow through session. saveOrUpdate(obj) or session.
The method evict() removes a single object from Session cache in ORM (Object Relationship Mapping) framework Hibernate. So before you call evict() the object should be there in the Session cache. Therefore if you save the object first time, you have to save the object via Session.
As I know evict() will clear particular object from session in hibernate and clear() will clear all objects from session.
evict() evicts a single object from the session. clear() evicts all the objects in the session. Calling clear() is like calling evict() on every object associated with the session.
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