Marker attribute for DR sender store implementation.
This annotation allow to use synchronous state transfer. Synchronous FST
only allowed when all sender hubs are configured with store which marked
with this annotation.
There is only one requirements: implementation of
DrSenderStore
should propely implement
DrSenderStore.store(byte[], byte[], int, IgniteUuid)
method and store the fst id, and then return back with
DrSenderStoreEntry
.
Synchronous state transfer may hang if the requirement will be violated.