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Since your db Main Connection class is constructed with the name of a database, and there are several database names, it makes no sense to make it a singleton.I have a table with 2 columns for storing application settings in Oracle database.This is a just basic example: I want to create a java method which updates the values with prepared statement.Example code: UPDATED CODE at javax.faces.component. Method Binding Method Expression Adapter.invoke(Method Binding Method Expression Adapter.java:102) at faces.application.current row value count =0; thread 1 updating it to count 1=1; thread 2 updating at the same time count 1=2 but it should not happen like this thread 1 updating it to count 1=1; thread 2 updating at the same time count 1=1; both threads should not catch the same value because both are running same time how can we achieve this in jdbc hibernate , database ??If you're working on a DB that has sequence generators (Oracle, Postgres, ...) you should consider using those.
You must have access to the Northwind sample database to create the connection.
and when I search on Stack Over Flow I get several answers. Having multiple instances of session factory can lead to performance problems as well as abnormal behavior of transactions.
What we can create more than one session Factory in Hibernate. Thanks Guys It is always recommended that there is one session factory per database, per JVM.
This walkthrough shows how to add code to save updates from more than one table.
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