How to inject persistence context to different data source programmatically?

Now at runtime you can build entity-manager for the required persistence-unit. Create separate persistence-units for each data-source.

Configure required data-sources & persistent-units accordingly in persistence. Xml accordingly. PERSISTENCE_PROVIDER java:DATA_SOURCE_NAME -- other units Now at runtime you can build entity-manager for the required persistence-unit.

Create separate persistence-units for each data-source. //--- EntityManagerFactory emf = Persistence. CreateEntityManagerFactory(persistenceUnitName); EntityManager em = emf.

CreateEntityManager(); //--- Else you can also build factory by providing a map of properties like db-url, userName etc. CreateEntityManagerFactory(persistenceUnitName,propertiesMap); This will create and return an EntityManagerFactory for the named persistence unit using the given properties. Therefore you can change the properties at runtime accordingly.

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