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I have a task to create multiple session factories for different Data Sources. One data source will be used for read requests and another for read-write requests.
Each API of our Database Service(a wrapper over DAO) is executed as a transaction. Single API may call multiple DAO functions having different Read/Write property.
What is the best possible way to perform this task?
I am assuming that the different datasources are different DBs . Else you could use the readOnly attribute with the @Transactional annotation to manage the read only transactions.
You could inject two separate session factories in the DAO layer to manage these transactions . Alternatively , you could use AbstractRoutingDataSource . See a write up on this here