How do I make a session thread safe?
SessionFactory is an immutable object and in Hibernate they created that by following singleton design pattern. Internally Hibernate is designed such a way that all sessions will be Thread safe and can be used one session at a time. but in single session you can create multiple transactions.
Is session factory thread safe?
The SessionFactory is a thread safe object and used by all the threads of an application. The SessionFactory is a heavyweight object; it is usually created during application start up and kept for later use. You would need one SessionFactory object per database using a separate configuration file.
What is the use of createAlias in hibernate?
createAlias. Join an association, assigning an alias to the joined association. Functionally equivalent to createAlias(String, String, int) using CriteriaSpecification. INNER_JOIN for the joinType.
Why Session is not thread-safe?
No, Session is not a thread-safe object, many threads can’t access it simultaneously. In other words, you cannot share it between threads.
Is Session factory immutable?
The internal state of a SessionFactory is immutable. Once it is created this internal state is set. This internal state includes all of the metadata about Object/Relational Mapping. Implementors must be threadsafe.
What is Session factory?
SessionFactory is an Interface which is present in org. hibernate package and it is used to create Session Object. It is immutable and thread-safe in nature. buildSessionFactory() method gathers the meta-data which is in the cfg Object. From cfg object it takes the JDBC information and create a JDBC Connection.
What is NHibernate queryover?
QueryOver Queries The ICriteria API is NHibernate’s implementation of Query Object. NHibernate 3.0 introduces the QueryOver API, which combines the use of Extension Methods and Lambda Expressions (both new in .Net 3.5) to provide a statically type-safe wrapper round the ICriteria API.
What is readonly in NHibernate?
ReadOnly is a safety measure that you can apply to NHibernate queries. I highly recommend you use this property when you do not intend to perform database updates/inserts. Take the following example:
How do I create a queries from an iSession?
Queries are created from an ISession using the syntax: Detached QueryOver (analogous to DetachedCriteria) can be created, and then used with an ISession using: Queries can be built up to use restrictions, projections, and ordering using a fluent inline syntax: 17.2.
What is queryover in Orm?
QueryOver is a powerful wrapper for the NHibernate ORM Criteria API. It is type-safe with a familiar syntax to Lambda expressions and LINQ. This post covers a nice range of real-world usage examples.