Migration from persistent shard coordinator to ddata with eventsource… (#29058)

* Migration from persistent shard coordinator to ddata with eventsourced remembered entities

* Fix bin compat in typed sharding

* Add log capturing

* Java API for nested case objects in typed sharding settings

* Starting some docs for remembering entities store

* Snapshot and marker to detect going back to persistence mode

* Review feedback

* Unused imports

akka-cluster-sharding/src/main/scala/akka/cluster/sharding/ClusterShardingSettings.scala

@@ -90,6 +90,7 @@ object ClusterShardingSettings {
       journalPluginId = config.getString("journal-plugin-id"),
       snapshotPluginId = config.getString("snapshot-plugin-id"),
       stateStoreMode = config.getString("state-store-mode"),
+      rememberEntitiesStore = config.getString("remember-entities-store"),
       passivateIdleEntityAfter = passivateIdleAfter,
       shardRegionQueryTimeout = config.getDuration("shard-region-query-timeout", MILLISECONDS).millis,
       tuningParameters,
@@ -238,6 +239,7 @@ final class ClusterShardingSettings(
     val journalPluginId: String,
     val snapshotPluginId: String,
     val stateStoreMode: String,
+    val rememberEntitiesStore: String,
     val passivateIdleEntityAfter: FiniteDuration,
     val shardRegionQueryTimeout: FiniteDuration,
     val tuningParameters: ClusterShardingSettings.TuningParameters,
@@ -245,6 +247,34 @@ final class ClusterShardingSettings(
     val leaseSettings: Option[LeaseUsageSettings])
     extends NoSerializationVerificationNeeded {
 
+  @deprecated(
+    "Use the ClusterShardingSettings factory methods or the constructor including rememberedEntitiesStoreinstead",
+    "2.6.6" // TODO update once merged
+  )
+  def this(
+      role: Option[String],
+      rememberEntities: Boolean,
+      journalPluginId: String,
+      snapshotPluginId: String,
+      stateStoreMode: String,
+      passivateIdleEntityAfter: FiniteDuration,
+      shardRegionQueryTimeout: FiniteDuration,
+      tuningParameters: ClusterShardingSettings.TuningParameters,
+      coordinatorSingletonSettings: ClusterSingletonManagerSettings,
+      leaseSettings: Option[LeaseUsageSettings]) =
+    this(
+      role,
+      rememberEntities,
+      journalPluginId,
+      snapshotPluginId,
+      stateStoreMode,
+      "ddata",
+      passivateIdleEntityAfter,
+      shardRegionQueryTimeout,
+      tuningParameters,
+      coordinatorSingletonSettings,
+      leaseSettings)
+
   // bin compat for 2.5.23
   @deprecated(
     "Use the ClusterShardingSettings factory methods or the constructor including shardRegionQueryTimeout instead",
@@ -269,7 +299,7 @@ final class ClusterShardingSettings(
       3.seconds,
       tuningParameters,
       coordinatorSingletonSettings,
-      None)
+      leaseSettings)
 
   // bin compat for 2.5.21
   @deprecated(
@@ -392,6 +422,7 @@ final class ClusterShardingSettings(
       journalPluginId,
       snapshotPluginId,
       stateStoreMode,
+      rememberEntitiesStore,
       passivateIdleAfter,
       shardRegionQueryTimeout,
       tuningParameters,