raboof/pekko
1
0
Fork 0
Code Issues Pull requests Projects Releases 6 Packages Wiki Activity Actions 11

Tests for EventSourced remember entities shard store (#29177)

Browse source 
* Tests for EventSourced remember entities shard store
* Move the migration event adapter to a better place and mention in docs.
This commit is contained in:
Johan Andrén 2020-06-04 09:54:28 +02:00 • committed by GitHub
parent eb923bbbe1
commit fb39ac1a9c
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
10 changed files with 145 additions and 80 deletions
Download patch file Download diff file Expand all files Collapse all files

19
akka-docs/src/main/paradox/typed/cluster-sharding.md
View file

@ -394,9 +394,24 @@ If using remembered entities there are two migration options:
* `ddata` for the state store and `ddata` for remembering entities. All remembered entities will be lost after a full cluster restart.
* `ddata` for the state store and `eventsourced` for remembering entities. The new `eventsourced` remembering entities store
reads the data written by the old `persistence` mode. Your remembered entities will be remembered.
reads the data written by the old `persistence` mode. Your remembered entities will be remembered after a full cluster restart.
Once you have migrated you cannot go back to the old persistence store.
For migrating existing remembered entities an event adapter needs to be configured in the config for the journal you use in your `application.conf`.
In this example `leveldb` is the used journal:
```
akka.persistence.journal.leveldb {
event-adapters {
coordinator-migration = "akka.cluster.sharding.OldCoordinatorStateMigrationEventAdapter"
}
event-adapter-bindings {
"akka.cluster.sharding.ShardCoordinator$Internal$DomainEvent" = coordinator-migration
}
}
```
Once you have migrated you cannot go back to the old persistence store, a rolling upgrade is therefore not possible.
When @ref:[Distributed Data mode](#distributed-data-mode) is used the identifiers of the entities are
stored in @ref:[Durable Storage](distributed-data.md#durable-storage) of Distributed Data. You may want to change the