Package org.datanucleus.store.federation
package org.datanucleus.store.federation
Package providing management for federation of datastores.
This allows us to have a PMF/EMF for multiple datastores, and to distribute any insert/update/delete/fetch to the relevant datastore.
It also allows us to query across multiple datastores and federate the results.
The more standard alternative to this is to have a PMF per datastore, and then to persist to whichever you want, and query whichever you want. Merging results is then left to the user.
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ClassesClassDescriptionJDOQL query that is federated across multiple datastoresPersistence handler for federated datastores.Manager for queries for federated datastores.A federated StoreManager orchestrates the persistence/retrieval for multiple datastores.