Can we connect to two databases using hibernate?
To communicate with another database server, you need another hibernate configuration file similar to hibernate. cfg. xml. For example, let’s say we have a MySQL database server and a Microsoft SQL database server that will be used in an application.
Can we have two SessionFactory in hibernate?
hibernate” package. Session factory is long live multithreaded object. Usually one session factory should be created for one database. When you have multiple databases in your application you should create multiple SessionFactory object.
Can we use two databases in spring boot?
Actually, spring boot provides a very convenient way to use multiple datasources in a single application with properties file configurations.
How hibernate handle multiple databases?
You can connect two databases test1 and test2, retrieve data with only one hibernate with some tricks:
- hibernate SQLQuery: just add database name with the table “select * from test1.table1”, “select * from test2.table2”
- hibernate persistence: using the key schema in the hibernate mapping xml.
Can we have multiple configuration files in hibernate?
You could load both hibernate XML files into a single DOM object (combine your module’s “session-factory” tag children with your application’s ones) and then use the following code: import org. hibernate.
How Hibernate connect to multiple databases dynamically?
Is Session thread-safe in Hibernate?
No, Session is not a thread-safe object, many threads can access it simultaneously. In other words, you can share it between threads.
How hibernate connect to multiple databases dynamically?
Why do microservices need to separate databases?
Some queries must join data that is owned by multiple services. For example, finding customers in a particular region and their recent orders requires a join between customers and orders. Databases must sometimes be replicated and sharded in order to scale.
Can I have two Session factory in a single hibernate CFG XML?
1 Answer. Well, as you noticed, the root element of Hibernate’s XML configuration file must declare one and only one element as per the DTD:
How to connect two databases in one hibernate?
You can connect two databases test1 and test2, retrieve data with only one hibernate with some tricks: hibernate SQLQuery: just add database name with the table “select * from test1.table1”, “select * from test2.table2”. hibernate persistence: using the key schema in the hibernate mapping xml.
What is hibernate configuration file?
Hibernate is designed to be used with a large set of databases. The details of those databases are configured in an XML file called hibernate.cfg.xml. This configuration files could be given any name and is usually placed in the root of your application class path.
Is it possible to use one hibernate configuration file for MySQL?
It cannot be done using one hibernate configuration file. You need to have two configurations files for it. In Details, mysql configuration file be like this.
Is there a hibernateentitypackagemanager for multiple databases?
2) There is no HibernateEntityPackageManager, as the packages can be contributed by adding more HibernateConfigurers with the same Markers. For multiple database, a marker has to be used for accessing Session or HibernateSessionManager