Deprecate LevelDB (#30213)

* Deprecate LevelDB

In preparation of moving into the testing infra (or deleting it completely) at some distant future point in time

* Remove leveldb tests where there also is an inmem one

* More details in deprecation text, recommend inmem + journal proxy for testing etc.

akka-bench-jmh/src/main/scala/akka/persistence/LevelDbBatchingBenchmark.scala

@@ -6,18 +6,17 @@ package akka.persistence
 
 import java.io.File
 import java.util.concurrent.TimeUnit
-
 import scala.concurrent.Await
 import scala.concurrent.duration._
-
 import org.apache.commons.io.FileUtils
 import org.openjdk.jmh.annotations._
-
 import akka.actor._
 import akka.persistence.journal.AsyncWriteTarget._
 import akka.persistence.journal.leveldb.{ SharedLeveldbJournal, SharedLeveldbStore }
 import akka.testkit.TestProbe
 
+import scala.annotation.nowarn
+
 /*
   # OS:   OSX 10.9.3
   # CPU:  Intel(R) Core(TM) i7-4850HQ CPU @ 2.30GHz
@@ -49,6 +48,7 @@ class LevelDbBatchingBenchmark {
   val batch_200 = List.fill(200) { AtomicWrite(PersistentRepr("data", 12, "pa")) }
 
   @Setup(Level.Trial)
+  @nowarn("msg=deprecated")
   def setup(): Unit = {
     sys = ActorSystem("sys")
     deleteStorage(sys)

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

@@ -9,7 +9,6 @@ import scala.concurrent.Promise
 import scala.util.Failure
 import scala.util.Success
 import scala.util.Try
-
 import akka.actor.Actor
 import akka.actor.ActorLogging
 import akka.actor.ActorRef
@@ -21,6 +20,8 @@ import akka.persistence._
 import akka.persistence.journal.leveldb.SharedLeveldbJournal
 import akka.persistence.journal.leveldb.SharedLeveldbStore
 
+import scala.annotation.nowarn
+
 /**
  * Utility program that removes the internal data stored with Akka Persistence
  * by the Cluster `ShardCoordinator`. The data contains the locations of the
@@ -91,6 +92,7 @@ object RemoveInternalClusterShardingData {
       if (journalPluginId == "") system.settings.config.getString("akka.persistence.journal.plugin")
       else journalPluginId
     if (resolvedJournalPluginId == "akka.persistence.journal.leveldb-shared") {
+      @nowarn("msg=deprecated")
       val store = system.actorOf(Props[SharedLeveldbStore](), "store")
       SharedLeveldbJournal.setStore(store, system)
     }

akka-cluster-sharding/src/multi-jvm/scala/akka/cluster/sharding/ClusterShardingSpec.scala

@@ -22,6 +22,8 @@ import akka.remote.testconductor.RoleName
 import akka.testkit._
 import akka.testkit.TestEvent.Mute
 
+import scala.annotation.nowarn
+
 object ClusterShardingSpec {
   //#counter-actor
   case object Increment
@@ -273,6 +275,7 @@ class DDataClusterShardingWithEntityRecoveryMultiJvmNode5 extends DDataClusterSh
 class DDataClusterShardingWithEntityRecoveryMultiJvmNode6 extends DDataClusterShardingWithEntityRecoverySpec
 class DDataClusterShardingWithEntityRecoveryMultiJvmNode7 extends DDataClusterShardingWithEntityRecoverySpec
 
+@nowarn("msg=deprecated")
 abstract class ClusterShardingSpec(multiNodeConfig: ClusterShardingSpecConfig)
     extends MultiNodeClusterShardingSpec(multiNodeConfig)
     with ImplicitSender

akka-cluster-sharding/src/multi-jvm/scala/akka/cluster/sharding/MultiNodeClusterShardingSpec.scala

@@ -5,11 +5,8 @@
 package akka.cluster.sharding
 
 import java.io.File
-
 import scala.concurrent.duration._
-
 import org.apache.commons.io.FileUtils
-
 import akka.actor.{ Actor, ActorIdentity, ActorLogging, ActorRef, ActorSystem, Identify, PoisonPill, Props }
 import akka.cluster.MultiNodeClusterSpec
 import akka.cluster.sharding.ShardCoordinator.ShardAllocationStrategy
@@ -21,6 +18,8 @@ import akka.serialization.jackson.CborSerializable
 import akka.testkit.{ TestActors, TestProbe }
 import akka.util.ccompat._
 
+import scala.annotation.nowarn
+
 @ccompatUsedUntil213
 object MultiNodeClusterShardingSpec {
 
@@ -207,6 +206,7 @@ abstract class MultiNodeClusterShardingSpec(val config: MultiNodeClusterSharding
    * @param startOn the node to start the `SharedLeveldbStore` store on
    * @param setStoreOn the nodes to `SharedLeveldbJournal.setStore` on
    */
+  @nowarn("msg=deprecated")
   protected def startPersistence(startOn: RoleName, setStoreOn: Seq[RoleName]): Unit = {
     info("Setting up setup shared journal.")
 

akka-docs/src/main/paradox/persistence-plugins.md

@@ -68,7 +68,10 @@ This plugin writes events to a local LevelDB instance.
 
 @@@ warning
 The LevelDB plugin cannot be used in an Akka Cluster since the storage is in a local file system.
-@@@ 
+@@@
+
+The LevelDB journal is deprecated and it is not advised to build new applications with it.
+As a replacement we recommend using [Akka Persistence JDBC](https://doc.akka.io/docs/akka-persistence-jdbc/current/index.html).
 
 The LevelDB journal plugin config entry is `akka.persistence.journal.leveldb`. Enable this plugin by
 defining config property:
@@ -99,14 +102,8 @@ this end, LevelDB offers a special journal compaction function that is exposed v
 
 ### Shared LevelDB journal
 
-For testing purposes a LevelDB instance can also be shared by multiple actor systems (on the same or on different nodes). This, for
+The LevelDB journal is deprecated and will be removed from a future Akka version, it is not advised to build new 
-example, allows persistent actors to failover to a backup node and continue using the shared journal instance from the
+applications with it. For testing in a multi node environment the "inmem" journal together with the @ref[proxy plugin](#persistence-plugin-proxy) can be used, but the actual journal used in production of applications is also a good choice.
-backup node.
-
-@@@ warning
-A shared LevelDB instance is a single point of failure and should therefore only be used for testing
-purposes.
-@@@
 
 @@@ note
 This plugin has been supplanted by @ref:[Persistence Plugin Proxy](#persistence-plugin-proxy).
@@ -165,20 +162,21 @@ you don't have to configure it.
 
 ### Persistence Plugin Proxy
 
-For testing purposes a persistence plugin proxy allows sharing of journals and snapshot stores across multiple actor systems (on the same or
+For testing purposes a persistence plugin proxy allows sharing of a journal and snapshot store on a single node across multiple 
-on different nodes). This, for example, allows persistent actors to failover to a backup node and continue using the
+actor systems (on the same or on different nodes). This, for example, allows persistent actors to failover to a backup 
-shared journal instance from the backup node. The proxy works by forwarding all the journal/snapshot store messages to a
+node and continue using the shared journal instance from the backup node. The proxy works by forwarding all the 
-single, shared, persistence plugin instance, and therefore supports any use case supported by the proxied plugin.
+journal/snapshot store messages to a single, shared, persistence plugin instance, and therefore supports any use case 
+supported by the proxied plugin.
 
 @@@ warning
-A shared journal/snapshot store is a single point of failure and should therefore only be used for testing
+A shared journal/snapshot store is a single point of failure and should only be used for testing
 purposes.
 @@@
 
 The journal and snapshot store proxies are controlled via the `akka.persistence.journal.proxy` and
 `akka.persistence.snapshot-store.proxy` configuration entries, respectively. Set the `target-journal-plugin` or
 `target-snapshot-store-plugin` keys to the underlying plugin you wish to use (for example:
-`akka.persistence.journal.leveldb`). The `start-target-journal` and `start-target-snapshot-store` keys should be
+`akka.persistence.journal.inmem`). The `start-target-journal` and `start-target-snapshot-store` keys should be
 set to `on` in exactly one actor system - this is the system that will instantiate the shared persistence plugin.
 Next, the proxy needs to be told how to find the shared plugin. This can be done by setting the `target-journal-address`
 and `target-snapshot-store-address` configuration keys, or programmatically by calling the

akka-docs/src/main/paradox/persistence-query-leveldb.md

@@ -1,5 +1,8 @@
 # Persistence Query for LevelDB
 
+The LevelDB journal and query plugin is deprecated and it is not advised to build new applications with it.
+As a replacement we recommend using [Akka Persistence JDBC](https://doc.akka.io/docs/akka-persistence-jdbc/current/index.html).
+
 ## Dependency
 
 To use Persistence Query, you must add the following dependency in your project:

akka-docs/src/main/paradox/persistence-query.md

@@ -266,8 +266,6 @@ used the next time this projection is started. This pattern is implemented in th
 Query plugins are various (mostly community driven) `ReadJournal` implementations for all kinds
 of available datastores. The complete list of available plugins is maintained on the Akka Persistence Query [Community Plugins](https://akka.io/community/#plugins-to-akka-persistence-query) page.
 
-The plugin for LevelDB is described in @ref:[Persistence Query for LevelDB](persistence-query-leveldb.md).
-
 This section aims to provide tips and guide plugin developers through implementing a custom query plugin.
 Most users will not need to implement journals themselves, except if targeting a not yet supported datastore.
 

akka-docs/src/main/paradox/persistence.md

@@ -44,7 +44,7 @@ recover its state from these messages.
 case of sender and receiver JVM crashes.
  * `AsyncWriteJournal`: A journal stores the sequence of messages sent to a persistent actor. An application can control which messages
 are journaled and which are received by the persistent actor without being journaled. Journal maintains `highestSequenceNr` that is increased on each message.
-The storage backend of a journal is pluggable. The persistence extension comes with a "leveldb" journal plugin, which writes to the local filesystem.
+The storage backend of a journal is pluggable. 
 Replicated journals are available as [Community plugins](https://akka.io/community/).
  * *Snapshot store*: A snapshot store persists snapshots of a persistent actor's state. Snapshots are
 used for optimizing recovery times. The storage backend of a snapshot store is pluggable.
@@ -828,6 +828,10 @@ For more advanced schema evolution techniques refer to the @ref:[Persistence - S
 
 ## Testing with LevelDB journal
 
+The LevelDB journal is deprecated and will be removed from a future Akka version, it is not advised to build new applications 
+with it. For testing the built in "inmem" journal or the actual journal that will be used in production of the application 
+is recommended. See @ref[Persistence Plugins](persistence-plugins.md) for some journal implementation choices.
+
 When running tests with LevelDB default settings in `sbt`, make sure to set `fork := true` in your sbt project. Otherwise, you'll see an `UnsatisfiedLinkError`. Alternatively, you can switch to a LevelDB Java port by setting
 
 @@snip [PersistencePluginDocSpec.scala](/akka-docs/src/test/scala/docs/persistence/PersistencePluginDocSpec.scala) { #native-config }
@@ -836,9 +840,7 @@ or
 
 @@snip [PersistencePluginDocSpec.scala](/akka-docs/src/test/scala/docs/persistence/PersistencePluginDocSpec.scala) { #shared-store-native-config }
 
-in your Akka configuration. The LevelDB Java port is for testing purposes only.
+in your Akka configuration. Also note that for the LevelDB Java port, you will need the following dependencies:
-
-Also note that for the LevelDB Java port, you will need the following dependencies:
 
 @@dependency[sbt,Maven,Gradle] {
   group="org.iq80.leveldb"

akka-persistence-query/src/main/scala/akka/persistence/query/journal/leveldb/LeveldbReadJournalProvider.scala

@@ -9,6 +9,7 @@ import com.typesafe.config.Config
 import akka.actor.ExtendedActorSystem
 import akka.persistence.query.ReadJournalProvider
 
+@deprecated("Use another journal/query implementation", "2.6.15")
 class LeveldbReadJournalProvider(system: ExtendedActorSystem, config: Config) extends ReadJournalProvider {
 
   override val scaladslReadJournal: scaladsl.LeveldbReadJournal =

akka-persistence-query/src/main/scala/akka/persistence/query/journal/leveldb/javadsl/LeveldbReadJournal.scala

@@ -25,6 +25,7 @@ import akka.stream.javadsl.Source
  * for the default [[LeveldbReadJournal#Identifier]]. See `reference.conf`.
  *
  */
+@deprecated("Use another journal implementation", "2.6.15")
 class LeveldbReadJournal(scaladslReadJournal: akka.persistence.query.journal.leveldb.scaladsl.LeveldbReadJournal)
     extends ReadJournal
     with PersistenceIdsQuery

akka-persistence-query/src/main/scala/akka/persistence/query/journal/leveldb/scaladsl/LeveldbReadJournal.scala

@@ -39,6 +39,7 @@ import akka.util.ByteString
  * absolute path corresponding to the identifier, which is `"akka.persistence.query.journal.leveldb"`
  * for the default [[LeveldbReadJournal#Identifier]]. See `reference.conf`.
  */
+@deprecated("Use another journal implementation", "2.6.15")
 class LeveldbReadJournal(system: ExtendedActorSystem, config: Config)
     extends ReadJournal
     with PersistenceIdsQuery

akka-persistence-query/src/test/scala/akka/persistence/query/journal/leveldb/AllPersistenceIdsSpec.scala

@@ -5,7 +5,6 @@
 package akka.persistence.query.journal.leveldb
 
 import scala.concurrent.duration._
-
 import akka.persistence.query.PersistenceQuery
 import akka.persistence.query.journal.leveldb.scaladsl.LeveldbReadJournal
 import akka.persistence.query.scaladsl.PersistenceIdsQuery
@@ -13,6 +12,8 @@ import akka.stream.testkit.scaladsl.TestSink
 import akka.testkit.AkkaSpec
 import akka.testkit.ImplicitSender
 
+import scala.annotation.nowarn
+
 object AllPersistenceIdsSpec {
   val config = """
     akka.loglevel = INFO
@@ -27,6 +28,7 @@ object AllPersistenceIdsSpec {
 
 class AllPersistenceIdsSpec extends AkkaSpec(AllPersistenceIdsSpec.config) with Cleanup with ImplicitSender {
 
+  @nowarn("msg=deprecated")
   val queries = PersistenceQuery(system).readJournalFor[LeveldbReadJournal](LeveldbReadJournal.Identifier)
 
   "Leveldb query AllPersistenceIds" must {

akka-persistence-query/src/test/scala/akka/persistence/query/journal/leveldb/EventsByPersistenceIdSpec.scala

@@ -5,7 +5,6 @@
 package akka.persistence.query.journal.leveldb
 
 import scala.concurrent.duration._
-
 import akka.actor.ActorRef
 import akka.persistence.query.EventEnvelope
 import akka.persistence.query.PersistenceQuery
@@ -15,6 +14,8 @@ import akka.stream.testkit.scaladsl.TestSink
 import akka.testkit.AkkaSpec
 import akka.testkit.ImplicitSender
 
+import scala.annotation.nowarn
+
 object EventsByPersistenceIdSpec {
   val config = """
     akka.loglevel = INFO
@@ -30,6 +31,7 @@ object EventsByPersistenceIdSpec {
 
 class EventsByPersistenceIdSpec extends AkkaSpec(EventsByPersistenceIdSpec.config) with Cleanup with ImplicitSender {
 
+  @nowarn("msg=deprecated")
   val queries = PersistenceQuery(system).readJournalFor[LeveldbReadJournal](LeveldbReadJournal.Identifier)
 
   def setup(persistenceId: String): ActorRef = {

akka-persistence-query/src/test/scala/akka/persistence/query/journal/leveldb/EventsByTagSpec.scala

@@ -5,7 +5,6 @@
 package akka.persistence.query.journal.leveldb
 
 import scala.concurrent.duration._
-
 import akka.persistence.journal.Tagged
 import akka.persistence.journal.WriteEventAdapter
 import akka.persistence.query.EventEnvelope
@@ -18,6 +17,8 @@ import akka.stream.testkit.scaladsl.TestSink
 import akka.testkit.AkkaSpec
 import akka.testkit.ImplicitSender
 
+import scala.annotation.nowarn
+
 object EventsByTagSpec {
   val config = s"""
     akka.loglevel = INFO
@@ -61,6 +62,7 @@ class ColorTagger extends WriteEventAdapter {
 
 class EventsByTagSpec extends AkkaSpec(EventsByTagSpec.config) with Cleanup with ImplicitSender {
 
+  @nowarn("msg=deprecated")
   val queries = PersistenceQuery(system).readJournalFor[LeveldbReadJournal](LeveldbReadJournal.Identifier)
 
   "Leveldb query EventsByTag" must {
@@ -212,6 +214,7 @@ class EventsByTagSpec extends AkkaSpec(EventsByTagSpec.config) with Cleanup with
     }
 
     "finds events without refresh" in {
+      @nowarn("msg=deprecated")
       val queries = PersistenceQuery(system).readJournalFor[LeveldbReadJournal]("leveldb-no-refresh")
       val d = system.actorOf(TestActor.props("y"))
 

akka-persistence-typed/src/test/scala/akka/persistence/typed/scaladsl/EventSourcedBehaviorSpec.scala

@@ -6,18 +6,15 @@ package akka.persistence.typed.scaladsl
 
 import java.util.UUID
 import java.util.concurrent.atomic.AtomicInteger
-
 import scala.concurrent.Future
 import scala.concurrent.Promise
 import scala.concurrent.duration._
 import scala.util.Failure
 import scala.util.Success
 import scala.util.Try
-
 import com.typesafe.config.Config
 import com.typesafe.config.ConfigFactory
 import org.scalatest.wordspec.AnyWordSpecLike
-
 import akka.Done
 import akka.actor.ActorInitializationException
 import akka.actor.testkit.typed.TestException
@@ -47,6 +44,8 @@ import akka.persistence.typed.SnapshotSelectionCriteria
 import akka.serialization.jackson.CborSerializable
 import akka.stream.scaladsl.Sink
 
+import scala.annotation.nowarn
+
 object EventSourcedBehaviorSpec {
 
   class SlowInMemorySnapshotStore extends SnapshotStore {
@@ -286,6 +285,7 @@ class EventSourcedBehaviorSpec
 
   import EventSourcedBehaviorSpec._
 
+  @nowarn("msg=deprecated")
   val queries: LeveldbReadJournal =
     PersistenceQuery(system).readJournalFor[LeveldbReadJournal](LeveldbReadJournal.Identifier)
 

akka-persistence-typed/src/test/scala/akka/persistence/typed/scaladsl/EventSourcedEventAdapterSpec.scala

@@ -6,10 +6,8 @@ package akka.persistence.typed.scaladsl
 
 import java.util.UUID
 import java.util.concurrent.atomic.AtomicInteger
-
 import com.typesafe.config.ConfigFactory
 import org.scalatest.wordspec.AnyWordSpecLike
-
 import akka.actor.testkit.typed.scaladsl.LogCapturing
 import akka.actor.testkit.typed.scaladsl.ScalaTestWithActorTestKit
 import akka.actor.testkit.typed.scaladsl.TestProbe
@@ -26,6 +24,8 @@ import akka.serialization.jackson.CborSerializable
 import akka.stream.scaladsl.Sink
 import akka.testkit.JavaSerializable
 
+import scala.annotation.nowarn
+
 object EventSourcedEventAdapterSpec {
 
   private val conf = ConfigFactory.parseString(s"""
@@ -100,6 +100,7 @@ class EventSourcedEventAdapterSpec
   val pidCounter = new AtomicInteger(0)
   private def nextPid(): PersistenceId = PersistenceId.ofUniqueId(s"c${pidCounter.incrementAndGet()})")
 
+  @nowarn("msg=deprecated")
   val queries: LeveldbReadJournal =
     PersistenceQuery(system).readJournalFor[LeveldbReadJournal](LeveldbReadJournal.Identifier)
 

akka-persistence-typed/src/test/scala/akka/persistence/typed/scaladsl/EventSourcedSnapshotAdapterSpec.scala

@@ -6,11 +6,9 @@ package akka.persistence.typed.scaladsl
 
 import java.util.UUID
 import java.util.concurrent.atomic.AtomicInteger
-
 import com.typesafe.config.Config
 import com.typesafe.config.ConfigFactory
 import org.scalatest.wordspec.AnyWordSpecLike
-
 import akka.actor.testkit.typed.scaladsl.LogCapturing
 import akka.actor.testkit.typed.scaladsl.ScalaTestWithActorTestKit
 import akka.actor.testkit.typed.scaladsl.TestProbe
@@ -21,6 +19,8 @@ import akka.persistence.typed.PersistenceId
 import akka.persistence.typed.SnapshotAdapter
 import akka.serialization.jackson.CborSerializable
 
+import scala.annotation.nowarn
+
 object EventSourcedSnapshotAdapterSpec {
   private val conf: Config = ConfigFactory.parseString(s"""
     akka.persistence.journal.leveldb.dir = "target/typed-persistence-${UUID.randomUUID().toString}"
@@ -45,6 +45,7 @@ class EventSourcedSnapshotAdapterSpec
   val pidCounter = new AtomicInteger(0)
   private def nextPid(): PersistenceId = PersistenceId.ofUniqueId(s"c${pidCounter.incrementAndGet()})")
 
+  @nowarn("msg=deprecated")
   val queries: LeveldbReadJournal =
     PersistenceQuery(system.toClassic).readJournalFor[LeveldbReadJournal](LeveldbReadJournal.Identifier)
 

akka-persistence/src/main/scala/akka/persistence/journal/leveldb/LeveldbJournal.scala

@@ -24,6 +24,7 @@ import akka.util.Timeout
  *
  * Journal backed by a local LevelDB store. For production use.
  */
+@deprecated("Use another journal implementation", "2.6.15")
 private[persistence] class LeveldbJournal(cfg: Config) extends AsyncWriteJournal with LeveldbStore {
   import LeveldbJournal._
 

akka-persistence/src/main/scala/akka/persistence/journal/leveldb/SharedLeveldbStore.scala

@@ -21,6 +21,7 @@ import akka.persistence.journal.AsyncWriteTarget
  * set for each actor system that uses the store via `SharedLeveldbJournal.setStore`. The
  * shared LevelDB store is for testing only.
  */
+@deprecated("Use another journal implementation or the in-mem journal in combination with the journal-proxy", "2.6.15")
 class SharedLeveldbStore(cfg: Config) extends LeveldbStore {
   import AsyncWriteTarget._
   import context.dispatcher

akka-persistence/src/test/scala/akka/persistence/AtLeastOnceDeliverySpec.scala

@@ -8,8 +8,6 @@ import scala.concurrent.duration._
 import scala.util.Failure
 import scala.util.control.NoStackTrace
 
-import com.typesafe.config._
-
 import akka.actor._
 import akka.persistence.AtLeastOnceDelivery.{ AtLeastOnceDeliverySnapshot, UnconfirmedWarning }
 import akka.testkit._
@@ -189,7 +187,10 @@ object AtLeastOnceDeliverySpec {
 
 }
 
-abstract class AtLeastOnceDeliverySpec(config: Config) extends PersistenceSpec(config) with ImplicitSender {
+class AtLeastOnceDeliverySpec
+    extends PersistenceSpec(PersistenceSpec.config("inmem", "AtLeastOnceDeliverySpec"))
+    with ImplicitSender {
+
   import akka.persistence.AtLeastOnceDeliverySpec._
 
   "AtLeastOnceDelivery" must {
@@ -440,9 +441,3 @@ abstract class AtLeastOnceDeliverySpec(config: Config) extends PersistenceSpec(c
     }
   }
 }
-
-class LeveldbAtLeastOnceDeliverySpec
-    extends AtLeastOnceDeliverySpec(PersistenceSpec.config("leveldb", "AtLeastOnceDeliverySpec"))
-
-class InmemAtLeastOnceDeliverySpec
-    extends AtLeastOnceDeliverySpec(PersistenceSpec.config("inmem", "AtLeastOnceDeliverySpec"))

akka-persistence/src/test/scala/akka/persistence/EndToEndEventAdapterSpec.scala

@@ -109,12 +109,14 @@ object EndToEndEventAdapterSpec {
 
 }
 
-abstract class EndToEndEventAdapterSpec(journalName: String, journalConfig: Config)
+// needs persistence between actor systems, thus not running with the inmem journal
-    extends AnyWordSpecLike
+// FIXME move to inmem + proxy
-    with Matchers
+class EndToEndEventAdapterSpec extends AnyWordSpecLike with Matchers with BeforeAndAfterAll {
-    with BeforeAndAfterAll {
   import EndToEndEventAdapterSpec._
 
+  val journalName = "leveldb"
+  val journalConfig = PersistenceSpec.config("leveldb", "LeveldbEndToEndEventAdapterSpec")
+
   val storageLocations = List("akka.persistence.journal.leveldb.dir").map(s => new File(journalConfig.getString(s)))
 
   override protected def beforeAll(): Unit = {
@@ -253,7 +255,3 @@ abstract class EndToEndEventAdapterSpec(journalName: String, journalConfig: Conf
     }
   }
 }
-
-// needs persistence between actor systems, thus not running with the inmem journal
-class LeveldbEndToEndEventAdapterSpec
-    extends EndToEndEventAdapterSpec("leveldb", PersistenceSpec.config("leveldb", "LeveldbEndToEndEventAdapterSpec"))

akka-persistence/src/test/scala/akka/persistence/EventAdapterSpec.scala

@@ -10,7 +10,6 @@ import com.typesafe.config.{ Config, ConfigFactory }
 
 import akka.actor._
 import akka.event.Logging
-import akka.persistence.EventAdapterSpec.{ Tagged, UserDataChanged }
 import akka.persistence.journal.{ EventAdapter, EventSeq, SingleEventSeq }
 import akka.testkit.ImplicitSender
 
@@ -98,13 +97,13 @@ object EventAdapterSpec {
 
 }
 
-abstract class EventAdapterSpec(journalName: String, journalConfig: Config, adapterConfig: Config)
+class EventAdapterSpec(journalName: String, journalConfig: Config, adapterConfig: Config)
     extends PersistenceSpec(journalConfig.withFallback(adapterConfig))
     with ImplicitSender {
 
   import EventAdapterSpec._
 
-  def this(journalName: String) =
+  def this() =
     this(
       "inmem",
       PersistenceSpec.config("inmem", "InmemPersistentTaggingSpec"),
@@ -183,13 +182,6 @@ abstract class EventAdapterSpec(journalName: String, journalConfig: Config, adap
       toJournal(event, "with-actor-system") should equal(event)
       fromJournal(event, "with-actor-system") should equal(SingleEventSeq(event))
     }
-  }
-
-}
-
-trait ReplayPassThrough { this: EventAdapterSpec =>
-  "EventAdapter" must {
-
     "store events after applying adapter" in {
       val replayPassThroughJournalId = "replay-pass-through-adapter-journal"
 
@@ -210,12 +202,6 @@ trait ReplayPassThrough { this: EventAdapterSpec =>
       expectMsg(Tagged(m1, Set("adult")))
       expectMsg(m2)
     }
-  }
-
-}
-
-trait NoAdapters { this: EventAdapterSpec =>
-  "EventAdapter" must {
     "work when plugin defines no adapter" in {
       val p2 = persister("p2", journalId = "no-adapter")
       val m1 = UserDataChanged("name", 64)
@@ -234,15 +220,5 @@ trait NoAdapters { this: EventAdapterSpec =>
       expectMsg(m1)
       expectMsg(m2)
     }
-
   }
 }
-
-// this style of testing allows us to try different leveldb journal plugin configurations
-// because it always would use the same leveldb directory anyway (based on class name),
-// yet we need different instances of the plugin. For inmem it does not matter, it can survive many instances.
-class InmemEventAdapterSpec extends EventAdapterSpec("inmem") with ReplayPassThrough with NoAdapters
-
-class LeveldbBaseEventAdapterSpec extends EventAdapterSpec("leveldb")
-class LeveldbReplayPassThroughEventAdapterSpec extends EventAdapterSpec("leveldb") with ReplayPassThrough
-class LeveldbNoAdaptersEventAdapterSpec extends EventAdapterSpec("leveldb") with NoAdapters

akka-persistence/src/test/scala/akka/persistence/OptionalSnapshotStoreSpec.scala

@@ -35,7 +35,6 @@ object OptionalSnapshotStoreSpec {
 class OptionalSnapshotStoreSpec extends PersistenceSpec(ConfigFactory.parseString(s"""
     akka.persistence.publish-plugin-commands = on
     akka.persistence.journal.plugin = "akka.persistence.journal.inmem"
-    akka.persistence.journal.leveldb.dir = "target/journal-${classOf[OptionalSnapshotStoreSpec].getName}"
 
     akka.actor.warn-about-java-serializer-usage = off
 

akka-persistence/src/test/scala/akka/persistence/PerformanceSpec.scala

@@ -116,7 +116,7 @@ object PerformanceSpec {
 class PerformanceSpec
     extends PersistenceSpec(
       PersistenceSpec
-        .config("leveldb", "PerformanceSpec", serialization = "off")
+        .config("inmem", "PerformanceSpec", serialization = "off")
         .withFallback(ConfigFactory.parseString(PerformanceSpec.config)))
     with ImplicitSender {
   import PerformanceSpec._

akka-persistence/src/test/scala/akka/persistence/PersistenceSpec.scala

@@ -79,10 +79,7 @@ object PersistenceSpec {
 
 trait Cleanup { this: AkkaSpec =>
   val storageLocations =
-    List(
+    List("akka.persistence.snapshot-store.local.dir").map(s => new File(system.settings.config.getString(s)))
-      "akka.persistence.journal.leveldb.dir",
-      "akka.persistence.journal.leveldb-shared.store.dir",
-      "akka.persistence.snapshot-store.local.dir").map(s => new File(system.settings.config.getString(s)))
 
   override protected def atStartup(): Unit = {
     storageLocations.foreach(FileUtils.deleteDirectory)

akka-persistence/src/test/scala/akka/persistence/PersistentActorSpec.scala

@@ -51,18 +51,6 @@ object PersistentActorSpec {
     def receiveRecover = updateState
   }
 
-  trait LevelDbRuntimePluginConfig extends PersistenceIdentity with RuntimePluginConfig {
-    val providedConfig: Config
-
-    override def journalPluginId: String = s"custom.persistence.journal.leveldb"
-
-    override def snapshotPluginId: String = "custom.persistence.snapshot-store.local"
-
-    override def journalPluginConfig: Config = providedConfig
-
-    override def snapshotPluginConfig: Config = providedConfig
-  }
-
   trait InmemRuntimePluginConfig extends PersistenceIdentity with RuntimePluginConfig {
     val providedConfig: Config
 
@@ -101,9 +89,6 @@ object PersistentActorSpec {
         case _         => super.onPersistFailure(cause, event, seqNr)
       }
   }
-  class Behavior1PersistentActorWithLevelDbRuntimePluginConfig(name: String, val providedConfig: Config)
-      extends Behavior1PersistentActor(name)
-      with LevelDbRuntimePluginConfig
   class Behavior1PersistentActorWithInmemRuntimePluginConfig(name: String, val providedConfig: Config)
       extends Behavior1PersistentActor(name)
       with InmemRuntimePluginConfig
@@ -115,9 +100,6 @@ object PersistentActorSpec {
         persistAll(Seq(Evt(s"${data}-3"), Evt(s"${data}-4")))(updateState)
     }
   }
-  class Behavior2PersistentActorWithLevelDbRuntimePluginConfig(name: String, val providedConfig: Config)
-      extends Behavior2PersistentActor(name)
-      with LevelDbRuntimePluginConfig
   class Behavior2PersistentActorWithInmemRuntimePluginConfig(name: String, val providedConfig: Config)
       extends Behavior2PersistentActor(name)
       with InmemRuntimePluginConfig
@@ -129,9 +111,6 @@ object PersistentActorSpec {
         updateState(Evt(s"${data}-10"))
     }
   }
-  class Behavior3PersistentActorWithLevelDbRuntimePluginConfig(name: String, val providedConfig: Config)
-      extends Behavior3PersistentActor(name)
-      with LevelDbRuntimePluginConfig
   class Behavior3PersistentActorWithInmemRuntimePluginConfig(name: String, val providedConfig: Config)
       extends Behavior3PersistentActor(name)
       with InmemRuntimePluginConfig
@@ -154,11 +133,6 @@ object PersistentActorSpec {
         }
     }
   }
-  class ChangeBehaviorInLastEventHandlerPersistentActorWithLevelDbRuntimePluginConfig(
-      name: String,
-      val providedConfig: Config)
-      extends ChangeBehaviorInLastEventHandlerPersistentActor(name)
-      with LevelDbRuntimePluginConfig
   class ChangeBehaviorInLastEventHandlerPersistentActorWithInmemRuntimePluginConfig(
       name: String,
       val providedConfig: Config)
@@ -183,11 +157,6 @@ object PersistentActorSpec {
         }
     }
   }
-  class ChangeBehaviorInFirstEventHandlerPersistentActorWithLevelDbRuntimePluginConfig(
-      name: String,
-      val providedConfig: Config)
-      extends ChangeBehaviorInFirstEventHandlerPersistentActor(name)
-      with LevelDbRuntimePluginConfig
   class ChangeBehaviorInFirstEventHandlerPersistentActorWithInmemRuntimePluginConfig(
       name: String,
       val providedConfig: Config)
@@ -208,11 +177,6 @@ object PersistentActorSpec {
         persist(Evt(s"${data}-0"))(updateState)
     }
   }
-  class ChangeBehaviorInCommandHandlerFirstPersistentActorWithLevelDbRuntimePluginConfig(
-      name: String,
-      val providedConfig: Config)
-      extends ChangeBehaviorInCommandHandlerFirstPersistentActor(name)
-      with LevelDbRuntimePluginConfig
   class ChangeBehaviorInCommandHandlerFirstPersistentActorWithInmemRuntimePluginConfig(
       name: String,
       val providedConfig: Config)
@@ -233,11 +197,6 @@ object PersistentActorSpec {
         context.become(newBehavior)
     }
   }
-  class ChangeBehaviorInCommandHandlerLastPersistentActorWithLevelDbRuntimePluginConfig(
-      name: String,
-      val providedConfig: Config)
-      extends ChangeBehaviorInCommandHandlerLastPersistentActor(name)
-      with LevelDbRuntimePluginConfig
   class ChangeBehaviorInCommandHandlerLastPersistentActorWithInmemRuntimePluginConfig(
       name: String,
       val providedConfig: Config)
@@ -261,12 +220,6 @@ object PersistentActorSpec {
       case "snap"                 => saveSnapshot(events)
     }
   }
-  class SnapshottingPersistentActorWithLevelDbRuntimePluginConfig(
-      name: String,
-      probe: ActorRef,
-      val providedConfig: Config)
-      extends SnapshottingPersistentActor(name, probe)
-      with LevelDbRuntimePluginConfig
   class SnapshottingPersistentActorWithInmemRuntimePluginConfig(
       name: String,
       probe: ActorRef,
@@ -291,12 +244,6 @@ object PersistentActorSpec {
       case "It's changing me" => probe ! "I am becoming"
     }
   }
-  class SnapshottingBecomingPersistentActorWithLevelDbRuntimePluginConfig(
-      name: String,
-      probe: ActorRef,
-      val providedConfig: Config)
-      extends SnapshottingBecomingPersistentActor(name, probe)
-      with LevelDbRuntimePluginConfig
   class SnapshottingBecomingPersistentActorWithInmemRuntimePluginConfig(
       name: String,
       probe: ActorRef,
@@ -309,9 +256,6 @@ object PersistentActorSpec {
       case Cmd("a") => persist(Evt("a"))(evt => sender() ! evt.data)
     }
   }
-  class ReplyInEventHandlerPersistentActorWithLevelDbRuntimePluginConfig(name: String, val providedConfig: Config)
-      extends ReplyInEventHandlerPersistentActor(name)
-      with LevelDbRuntimePluginConfig
   class ReplyInEventHandlerPersistentActorWithInmemRuntimePluginConfig(name: String, val providedConfig: Config)
       extends ReplyInEventHandlerPersistentActor(name)
       with InmemRuntimePluginConfig
@@ -339,9 +283,6 @@ object PersistentActorSpec {
       }
 
   }
-  class AsyncPersistPersistentActorWithLevelDbRuntimePluginConfig(name: String, val providedConfig: Config)
-      extends AsyncPersistPersistentActor(name)
-      with LevelDbRuntimePluginConfig
   class AsyncPersistPersistentActorWithInmemRuntimePluginConfig(name: String, val providedConfig: Config)
       extends AsyncPersistPersistentActor(name)
       with InmemRuntimePluginConfig
@@ -365,9 +306,6 @@ object PersistentActorSpec {
       counter
     }
   }
-  class AsyncPersistThreeTimesPersistentActorWithLevelDbRuntimePluginConfig(name: String, val providedConfig: Config)
-      extends AsyncPersistThreeTimesPersistentActor(name)
-      with LevelDbRuntimePluginConfig
   class AsyncPersistThreeTimesPersistentActorWithInmemRuntimePluginConfig(name: String, val providedConfig: Config)
       extends AsyncPersistThreeTimesPersistentActor(name)
       with InmemRuntimePluginConfig
@@ -392,11 +330,6 @@ object PersistentActorSpec {
         }
     }
   }
-  class AsyncPersistSameEventTwicePersistentActorWithLevelDbRuntimePluginConfig(
-      name: String,
-      val providedConfig: Config)
-      extends AsyncPersistSameEventTwicePersistentActor(name)
-      with LevelDbRuntimePluginConfig
   class AsyncPersistSameEventTwicePersistentActorWithInmemRuntimePluginConfig(name: String, val providedConfig: Config)
       extends AsyncPersistSameEventTwicePersistentActor(name)
       with InmemRuntimePluginConfig
@@ -418,9 +351,6 @@ object PersistentActorSpec {
         sender() ! data
     }
   }
-  class PersistAllNilPersistentActorWithLevelDbRuntimePluginConfig(name: String, val providedConfig: Config)
-      extends PersistAllNilPersistentActor(name)
-      with LevelDbRuntimePluginConfig
   class PersistAllNilPersistentActorWithInmemRuntimePluginConfig(name: String, val providedConfig: Config)
       extends PersistAllNilPersistentActor(name)
       with InmemRuntimePluginConfig
@@ -452,11 +382,6 @@ object PersistentActorSpec {
       counter
     }
   }
-  class AsyncPersistAndPersistMixedSyncAsyncSyncPersistentActorWithLevelDbRuntimePluginConfig(
-      name: String,
-      val providedConfig: Config)
-      extends AsyncPersistAndPersistMixedSyncAsyncSyncPersistentActor(name)
-      with LevelDbRuntimePluginConfig
   class AsyncPersistAndPersistMixedSyncAsyncSyncPersistentActorWithInmemRuntimePluginConfig(
       name: String,
       val providedConfig: Config)
@@ -485,11 +410,6 @@ object PersistentActorSpec {
       sendMsgCounter
     }
   }
-  class AsyncPersistAndPersistMixedSyncAsyncPersistentActorWithLevelDbRuntimePluginConfig(
-      name: String,
-      val providedConfig: Config)
-      extends AsyncPersistAndPersistMixedSyncAsyncPersistentActor(name)
-      with LevelDbRuntimePluginConfig
   class AsyncPersistAndPersistMixedSyncAsyncPersistentActorWithInmemRuntimePluginConfig(
       name: String,
       val providedConfig: Config)
@@ -507,9 +427,6 @@ object PersistentActorSpec {
         }
     }
   }
-  class AsyncPersistHandlerCorrelationCheckWithLevelDbRuntimePluginConfig(name: String, val providedConfig: Config)
-      extends AsyncPersistHandlerCorrelationCheck(name)
-      with LevelDbRuntimePluginConfig
   class AsyncPersistHandlerCorrelationCheckWithInmemRuntimePluginConfig(name: String, val providedConfig: Config)
       extends AsyncPersistHandlerCorrelationCheck(name)
       with InmemRuntimePluginConfig
@@ -519,9 +436,6 @@ object PersistentActorSpec {
       case Cmd("a") => persist(5)(evt => sender() ! evt)
     }
   }
-  class PrimitiveEventPersistentActorWithLevelDbRuntimePluginConfig(name: String, val providedConfig: Config)
-      extends PrimitiveEventPersistentActor(name)
-      with LevelDbRuntimePluginConfig
   class PrimitiveEventPersistentActorWithInmemRuntimePluginConfig(name: String, val providedConfig: Config)
       extends PrimitiveEventPersistentActor(name)
       with InmemRuntimePluginConfig
@@ -547,12 +461,6 @@ object PersistentActorSpec {
     }
 
   }
-  class HandleRecoveryFinishedEventPersistentActorWithLevelDbRuntimePluginConfig(
-      name: String,
-      probe: ActorRef,
-      val providedConfig: Config)
-      extends HandleRecoveryFinishedEventPersistentActor(name, probe)
-      with LevelDbRuntimePluginConfig
   class HandleRecoveryFinishedEventPersistentActorWithInmemRuntimePluginConfig(
       name: String,
       probe: ActorRef,
@@ -582,12 +490,6 @@ object PersistentActorSpec {
   }
   class DeferringAsyncWithPersistActor(name: String) extends DeferringWithPersistActor(name) with DeferAsync
   class DeferringSyncWithPersistActor(name: String) extends DeferringWithPersistActor(name) with DeferSync
-  class DeferringAsyncWithPersistActorWithLevelDbRuntimePluginConfig(name: String, val providedConfig: Config)
-      extends DeferringAsyncWithPersistActor(name)
-      with LevelDbRuntimePluginConfig
-  class DeferringSyncWithPersistActorWithLevelDbRuntimePluginConfig(name: String, val providedConfig: Config)
-      extends DeferringSyncWithPersistActor(name)
-      with LevelDbRuntimePluginConfig
   class DeferringAsyncWithPersistActorWithInmemRuntimePluginConfig(name: String, val providedConfig: Config)
       extends DeferringAsyncWithPersistActor(name)
       with InmemRuntimePluginConfig
@@ -606,12 +508,6 @@ object PersistentActorSpec {
   }
   class DeferringAsyncWithAsyncPersistActor(name: String) extends DeferringWithAsyncPersistActor(name) with DeferAsync
   class DeferringSyncWithAsyncPersistActor(name: String) extends DeferringWithAsyncPersistActor(name) with DeferSync
-  class DeferringAsyncWithAsyncPersistActorWithLevelDbRuntimePluginConfig(name: String, val providedConfig: Config)
-      extends DeferringAsyncWithAsyncPersistActor(name)
-      with LevelDbRuntimePluginConfig
-  class DeferringSyncWithAsyncPersistActorWithLevelDbRuntimePluginConfig(name: String, val providedConfig: Config)
-      extends DeferringSyncWithAsyncPersistActor(name)
-      with LevelDbRuntimePluginConfig
   class DeferringAsyncWithAsyncPersistActorWithInmemRuntimePluginConfig(name: String, val providedConfig: Config)
       extends DeferringAsyncWithAsyncPersistActor(name)
       with InmemRuntimePluginConfig
@@ -638,16 +534,6 @@ object PersistentActorSpec {
   class DeferringSyncMixedCallsPPADDPADPersistActor(name: String)
       extends DeferringMixedCallsPPADDPADPersistActor(name)
       with DeferSync
-  class DeferringAsyncMixedCallsPPADDPADPersistActorWithLevelDbRuntimePluginConfig(
-      name: String,
-      val providedConfig: Config)
-      extends DeferringAsyncMixedCallsPPADDPADPersistActor(name)
-      with LevelDbRuntimePluginConfig
-  class DeferringSyncMixedCallsPPADDPADPersistActorWithLevelDbRuntimePluginConfig(
-      name: String,
-      val providedConfig: Config)
-      extends DeferringSyncMixedCallsPPADDPADPersistActor(name)
-      with LevelDbRuntimePluginConfig
   class DeferringAsyncMixedCallsPPADDPADPersistActorWithInmemRuntimePluginConfig(
       name: String,
       val providedConfig: Config)
@@ -675,16 +561,6 @@ object PersistentActorSpec {
   class DeferringSyncWithNoPersistCallsPersistActor(name: String)
       extends DeferringWithNoPersistCallsPersistActor(name)
       with DeferSync
-  class DeferringAsyncWithNoPersistCallsPersistActorWithLevelDbRuntimePluginConfig(
-      name: String,
-      val providedConfig: Config)
-      extends DeferringAsyncWithNoPersistCallsPersistActor(name)
-      with LevelDbRuntimePluginConfig
-  class DeferringSyncWithNoPersistCallsPersistActorWithLevelDbRuntimePluginConfig(
-      name: String,
-      val providedConfig: Config)
-      extends DeferringSyncWithNoPersistCallsPersistActor(name)
-      with LevelDbRuntimePluginConfig
   class DeferringAsyncWithNoPersistCallsPersistActorWithInmemRuntimePluginConfig(
       name: String,
       val providedConfig: Config)
@@ -709,12 +585,6 @@ object PersistentActorSpec {
   }
   class DeferringAsyncActor(name: String) extends DeferringActor(name) with DeferAsync
   class DeferringSyncActor(name: String) extends DeferringActor(name) with DeferSync
-  class DeferringAsyncActorWithLevelDbRuntimePluginConfig(name: String, val providedConfig: Config)
-      extends DeferringAsyncActor(name)
-      with LevelDbRuntimePluginConfig
-  class DeferringSyncActorWithLevelDbRuntimePluginConfig(name: String, val providedConfig: Config)
-      extends DeferringSyncActor(name)
-      with LevelDbRuntimePluginConfig
   class DeferringAsyncActorWithInmemRuntimePluginConfig(name: String, val providedConfig: Config)
       extends DeferringAsyncActor(name)
       with InmemRuntimePluginConfig
@@ -735,9 +605,6 @@ object PersistentActorSpec {
         sender() ! s
     }
   }
-  class StressOrderingWithLevelDbRuntimePluginConfig(name: String, val providedConfig: Config)
-      extends StressOrdering(name)
-      with LevelDbRuntimePluginConfig
   class StressOrderingWithInmemRuntimePluginConfig(name: String, val providedConfig: Config)
       extends StressOrdering(name)
       with InmemRuntimePluginConfig
@@ -763,9 +630,6 @@ object PersistentActorSpec {
     }
 
   }
-  class RecoverMessageCausedRestartWithLevelDbRuntimePluginConfig(name: String, val providedConfig: Config)
-      extends RecoverMessageCausedRestart(name)
-      with LevelDbRuntimePluginConfig
   class RecoverMessageCausedRestartWithInmemRuntimePluginConfig(name: String, val providedConfig: Config)
       extends RecoverMessageCausedRestart(name)
       with InmemRuntimePluginConfig
@@ -788,12 +652,6 @@ object PersistentActorSpec {
         }
     }
   }
-  class MultipleAndNestedPersistsWithLevelDbRuntimePluginConfig(
-      name: String,
-      probe: ActorRef,
-      val providedConfig: Config)
-      extends MultipleAndNestedPersists(name, probe)
-      with LevelDbRuntimePluginConfig
   class MultipleAndNestedPersistsWithInmemRuntimePluginConfig(name: String, probe: ActorRef, val providedConfig: Config)
       extends MultipleAndNestedPersists(name, probe)
       with InmemRuntimePluginConfig
@@ -816,12 +674,6 @@ object PersistentActorSpec {
         }
     }
   }
-  class MultipleAndNestedPersistAsyncsWithLevelDbRuntimePluginConfig(
-      name: String,
-      probe: ActorRef,
-      val providedConfig: Config)
-      extends MultipleAndNestedPersistAsyncs(name, probe)
-      with LevelDbRuntimePluginConfig
   class MultipleAndNestedPersistAsyncsWithInmemRuntimePluginConfig(
       name: String,
       probe: ActorRef,
@@ -850,13 +702,6 @@ object PersistentActorSpec {
         persistAsync(s + "-" + 1)(weMustGoDeeper)
     }
   }
-  class DeeplyNestedPersistAsyncsWithLevelDbRuntimePluginConfig(
-      name: String,
-      maxDepth: Int,
-      probe: ActorRef,
-      val providedConfig: Config)
-      extends DeeplyNestedPersistAsyncs(name, maxDepth, probe)
-      with LevelDbRuntimePluginConfig
   class DeeplyNestedPersistAsyncsWithInmemRuntimePluginConfig(
       name: String,
       maxDepth: Int,
@@ -883,12 +728,6 @@ object PersistentActorSpec {
         }
     }
   }
-  class NestedPersistNormalAndAsyncsWithLevelDbRuntimePluginConfig(
-      name: String,
-      probe: ActorRef,
-      val providedConfig: Config)
-      extends NestedPersistNormalAndAsyncs(name, probe)
-      with LevelDbRuntimePluginConfig
   class NestedPersistNormalAndAsyncsWithInmemRuntimePluginConfig(
       name: String,
       probe: ActorRef,
@@ -914,12 +753,6 @@ object PersistentActorSpec {
         }
     }
   }
-  class NestedPersistAsyncsAndNormalWithLevelDbRuntimePluginConfig(
-      name: String,
-      probe: ActorRef,
-      val providedConfig: Config)
-      extends NestedPersistAsyncsAndNormal(name, probe)
-      with LevelDbRuntimePluginConfig
   class NestedPersistAsyncsAndNormalWithInmemRuntimePluginConfig(
       name: String,
       probe: ActorRef,
@@ -942,12 +775,6 @@ object PersistentActorSpec {
         }
     }
   }
-  class NestedPersistInAsyncEnforcesStashingWithLevelDbRuntimePluginConfig(
-      name: String,
-      probe: ActorRef,
-      val providedConfig: Config)
-      extends NestedPersistInAsyncEnforcesStashing(name, probe)
-      with LevelDbRuntimePluginConfig
   class NestedPersistInAsyncEnforcesStashingWithInmemRuntimePluginConfig(
       name: String,
       probe: ActorRef,
@@ -976,13 +803,6 @@ object PersistentActorSpec {
         persist(s + "-" + 1)(weMustGoDeeper)
     }
   }
-  class DeeplyNestedPersistsWithLevelDbRuntimePluginConfig(
-      name: String,
-      maxDepth: Int,
-      probe: ActorRef,
-      val providedConfig: Config)
-      extends DeeplyNestedPersists(name, maxDepth, probe)
-      with LevelDbRuntimePluginConfig
   class DeeplyNestedPersistsWithInmemRuntimePluginConfig(
       name: String,
       maxDepth: Int,
@@ -1029,9 +849,6 @@ object PersistentActorSpec {
     }
 
   }
-  class StackableTestPersistentActorWithLevelDbRuntimePluginConfig(probe: ActorRef, val providedConfig: Config)
-      extends StackableTestPersistentActor(probe)
-      with LevelDbRuntimePluginConfig
   class StackableTestPersistentActorWithInmemRuntimePluginConfig(probe: ActorRef, val providedConfig: Config)
       extends StackableTestPersistentActor(probe)
       with InmemRuntimePluginConfig
@@ -1117,9 +934,6 @@ object PersistentActorSpec {
       case Cmd(d) => persist(Evt(d))(updateState)
     }
   }
-  class PersistInRecoveryWithLevelDbRuntimePluginConfig(name: String, val providedConfig: Config)
-      extends PersistInRecovery(name)
-      with LevelDbRuntimePluginConfig
   class PersistInRecoveryWithInmemRuntimePluginConfig(name: String, val providedConfig: Config)
       extends PersistInRecovery(name)
       with InmemRuntimePluginConfig
@@ -1825,212 +1639,8 @@ abstract class PersistentActorSpec(config: Config) extends PersistenceSpec(confi
 
 }
 
-class LeveldbPersistentActorSpec
-    extends PersistentActorSpec(PersistenceSpec.config("leveldb", "LeveldbPersistentActorSpec"))
-
 class InmemPersistentActorSpec extends PersistentActorSpec(PersistenceSpec.config("inmem", "InmemPersistentActorSpec"))
 
-/**
- * Same test suite as [[LeveldbPersistentActorSpec]], the only difference is that all persistent actors are using the
- * provided [[Config]] instead of the [[Config]] coming from the [[ActorSystem]].
- */
-class LeveldbPersistentActorWithRuntimePluginConfigSpec
-    extends PersistentActorSpec(PersistenceSpec.config("leveldb", "LeveldbPersistentActorWithRuntimePluginConfigSpec")) {
-
-  val providedActorConfig: Config = {
-    ConfigFactory
-      .parseString(s"""
-         | custom.persistence.journal.leveldb.dir = target/journal-LeveldbPersistentActorWithRuntimePluginConfigSpec
-         | custom.persistence.snapshot-store.local.dir = target/snapshots-LeveldbPersistentActorWithRuntimePluginConfigSpec/
-     """.stripMargin)
-      .withValue(
-        s"custom.persistence.journal.leveldb",
-        system.settings.config.getValue(s"akka.persistence.journal.leveldb"))
-      .withValue(
-        "custom.persistence.snapshot-store.local",
-        system.settings.config.getValue("akka.persistence.snapshot-store.local"))
-  }
-
-  override protected def behavior1PersistentActor: ActorRef =
-    namedPersistentActorWithProvidedConfig[Behavior1PersistentActorWithLevelDbRuntimePluginConfig](providedActorConfig)
-
-  override protected def behavior2PersistentActor: ActorRef =
-    namedPersistentActorWithProvidedConfig[Behavior2PersistentActorWithLevelDbRuntimePluginConfig](providedActorConfig)
-
-  override protected def behavior3PersistentActor: ActorRef =
-    namedPersistentActorWithProvidedConfig[Behavior3PersistentActorWithLevelDbRuntimePluginConfig](providedActorConfig)
-
-  override protected def changeBehaviorInFirstEventHandlerPersistentActor: ActorRef =
-    namedPersistentActorWithProvidedConfig[
-      ChangeBehaviorInFirstEventHandlerPersistentActorWithLevelDbRuntimePluginConfig](providedActorConfig)
-
-  override protected def changeBehaviorInLastEventHandlerPersistentActor: ActorRef =
-    namedPersistentActorWithProvidedConfig[
-      ChangeBehaviorInLastEventHandlerPersistentActorWithLevelDbRuntimePluginConfig](providedActorConfig)
-
-  override protected def changeBehaviorInCommandHandlerFirstPersistentActor: ActorRef =
-    namedPersistentActorWithProvidedConfig[
-      ChangeBehaviorInCommandHandlerFirstPersistentActorWithLevelDbRuntimePluginConfig](providedActorConfig)
-
-  override protected def changeBehaviorInCommandHandlerLastPersistentActor: ActorRef =
-    namedPersistentActorWithProvidedConfig[
-      ChangeBehaviorInCommandHandlerLastPersistentActorWithLevelDbRuntimePluginConfig](providedActorConfig)
-
-  override protected def snapshottingPersistentActor: ActorRef =
-    system.actorOf(
-      Props(classOf[SnapshottingPersistentActorWithLevelDbRuntimePluginConfig], name, testActor, providedActorConfig))
-
-  override protected def snapshottingBecomingPersistentActor: ActorRef =
-    system.actorOf(
-      Props(
-        classOf[SnapshottingBecomingPersistentActorWithLevelDbRuntimePluginConfig],
-        name,
-        testActor,
-        providedActorConfig))
-
-  override protected def replyInEventHandlerPersistentActor: ActorRef =
-    namedPersistentActorWithProvidedConfig[ReplyInEventHandlerPersistentActorWithLevelDbRuntimePluginConfig](
-      providedActorConfig)
-
-  override protected def primitiveEventPersistentActor: ActorRef =
-    namedPersistentActorWithProvidedConfig[PrimitiveEventPersistentActorWithLevelDbRuntimePluginConfig](
-      providedActorConfig)
-
-  override protected def asyncPersistPersistentActor: ActorRef =
-    namedPersistentActorWithProvidedConfig[AsyncPersistPersistentActorWithLevelDbRuntimePluginConfig](
-      providedActorConfig)
-
-  override protected def asyncPersistThreeTimesPersistentActor: ActorRef =
-    namedPersistentActorWithProvidedConfig[AsyncPersistThreeTimesPersistentActorWithLevelDbRuntimePluginConfig](
-      providedActorConfig)
-
-  override protected def asyncPersistSameEventTwicePersistentActor: ActorRef =
-    namedPersistentActorWithProvidedConfig[AsyncPersistSameEventTwicePersistentActorWithLevelDbRuntimePluginConfig](
-      providedActorConfig)
-
-  override protected def persistAllNilPersistentActor: ActorRef =
-    namedPersistentActorWithProvidedConfig[PersistAllNilPersistentActorWithLevelDbRuntimePluginConfig](
-      providedActorConfig)
-
-  override protected def asyncPersistAndPersistMixedSyncAsyncSyncPersistentActor: ActorRef =
-    namedPersistentActorWithProvidedConfig[
-      AsyncPersistAndPersistMixedSyncAsyncSyncPersistentActorWithLevelDbRuntimePluginConfig](providedActorConfig)
-
-  override protected def asyncPersistAndPersistMixedSyncAsyncPersistentActor: ActorRef =
-    namedPersistentActorWithProvidedConfig[
-      AsyncPersistAndPersistMixedSyncAsyncPersistentActorWithLevelDbRuntimePluginConfig](providedActorConfig)
-
-  override protected def asyncPersistHandlerCorrelationCheck: ActorRef =
-    namedPersistentActorWithProvidedConfig[AsyncPersistHandlerCorrelationCheckWithLevelDbRuntimePluginConfig](
-      providedActorConfig)
-
-  override protected def handleRecoveryFinishedEventPersistentActor: ActorRef =
-    system.actorOf(
-      Props(
-        classOf[HandleRecoveryFinishedEventPersistentActorWithLevelDbRuntimePluginConfig],
-        name,
-        testActor,
-        providedActorConfig))
-
-  override protected def stressOrdering: ActorRef =
-    namedPersistentActorWithProvidedConfig[StressOrderingWithLevelDbRuntimePluginConfig](providedActorConfig)
-
-  override protected def stackableTestPersistentActor: ActorRef =
-    system.actorOf(
-      Props(classOf[StackableTestPersistentActorWithLevelDbRuntimePluginConfig], testActor, providedActorConfig))
-
-  override protected def multipleAndNestedPersists: ActorRef =
-    system.actorOf(
-      Props(classOf[MultipleAndNestedPersistsWithLevelDbRuntimePluginConfig], name, testActor, providedActorConfig))
-
-  override protected def multipleAndNestedPersistAsyncs: ActorRef =
-    system.actorOf(
-      Props(
-        classOf[MultipleAndNestedPersistAsyncsWithLevelDbRuntimePluginConfig],
-        name,
-        testActor,
-        providedActorConfig))
-
-  override protected def deeplyNestedPersists(nestedPersists: Int): ActorRef =
-    system.actorOf(
-      Props(
-        classOf[DeeplyNestedPersistsWithLevelDbRuntimePluginConfig],
-        name,
-        nestedPersists,
-        testActor,
-        providedActorConfig))
-
-  override protected def deeplyNestedPersistAsyncs(nestedPersistAsyncs: Int): ActorRef =
-    system.actorOf(
-      Props(
-        classOf[DeeplyNestedPersistAsyncsWithLevelDbRuntimePluginConfig],
-        name,
-        nestedPersistAsyncs,
-        testActor,
-        providedActorConfig))
-
-  override protected def nestedPersistNormalAndAsyncs: ActorRef =
-    system.actorOf(
-      Props(classOf[NestedPersistNormalAndAsyncsWithLevelDbRuntimePluginConfig], name, testActor, providedActorConfig))
-
-  override protected def nestedPersistAsyncsAndNormal: ActorRef =
-    system.actorOf(
-      Props(classOf[NestedPersistAsyncsAndNormalWithLevelDbRuntimePluginConfig], name, testActor, providedActorConfig))
-
-  override protected def nestedPersistInAsyncEnforcesStashing: ActorRef =
-    system.actorOf(
-      Props(
-        classOf[NestedPersistInAsyncEnforcesStashingWithLevelDbRuntimePluginConfig],
-        name,
-        testActor,
-        providedActorConfig))
-
-  override protected def persistInRecovery: ActorRef =
-    namedPersistentActorWithProvidedConfig[PersistInRecoveryWithLevelDbRuntimePluginConfig](providedActorConfig)
-
-  override protected def recoverMessageCausedRestart: ActorRef =
-    namedPersistentActorWithProvidedConfig[RecoverMessageCausedRestartWithLevelDbRuntimePluginConfig](
-      providedActorConfig)
-
-  override protected def deferringAsyncWithPersistActor: ActorRef =
-    namedPersistentActorWithProvidedConfig[DeferringAsyncWithPersistActorWithLevelDbRuntimePluginConfig](
-      providedActorConfig)
-
-  override protected def deferringSyncWithPersistActor: ActorRef =
-    namedPersistentActorWithProvidedConfig[DeferringSyncWithPersistActorWithLevelDbRuntimePluginConfig](
-      providedActorConfig)
-
-  override protected def deferringAsyncWithAsyncPersistActor: ActorRef =
-    namedPersistentActorWithProvidedConfig[DeferringAsyncWithAsyncPersistActorWithLevelDbRuntimePluginConfig](
-      providedActorConfig)
-
-  override protected def deferringSyncWithAsyncPersistActor: ActorRef =
-    namedPersistentActorWithProvidedConfig[DeferringSyncWithAsyncPersistActorWithLevelDbRuntimePluginConfig](
-      providedActorConfig)
-
-  override protected def deferringAsyncMixedCallsPPADDPADPersistActor: ActorRef =
-    namedPersistentActorWithProvidedConfig[DeferringAsyncMixedCallsPPADDPADPersistActorWithLevelDbRuntimePluginConfig](
-      providedActorConfig)
-
-  override protected def deferringSyncMixedCallsPPADDPADPersistActor: ActorRef =
-    namedPersistentActorWithProvidedConfig[DeferringSyncMixedCallsPPADDPADPersistActorWithLevelDbRuntimePluginConfig](
-      providedActorConfig)
-
-  override protected def deferringAsyncWithNoPersistCallsPersistActor: ActorRef =
-    namedPersistentActorWithProvidedConfig[DeferringAsyncWithNoPersistCallsPersistActorWithLevelDbRuntimePluginConfig](
-      providedActorConfig)
-
-  override protected def deferringSyncWithNoPersistCallsPersistActor: ActorRef =
-    namedPersistentActorWithProvidedConfig[DeferringSyncWithNoPersistCallsPersistActorWithLevelDbRuntimePluginConfig](
-      providedActorConfig)
-
-  override protected def deferringAsyncActor: ActorRef =
-    namedPersistentActorWithProvidedConfig[DeferringAsyncActorWithLevelDbRuntimePluginConfig](providedActorConfig)
-
-  override protected def deferringSyncActor: ActorRef =
-    namedPersistentActorWithProvidedConfig[DeferringSyncActorWithLevelDbRuntimePluginConfig](providedActorConfig)
-}
-
 /**
  * Same test suite as [[InmemPersistentActorSpec]], the only difference is that all persistent actors are using the
  * provided [[Config]] instead of the [[Config]] coming from the [[ActorSystem]].

akka-persistence/src/test/scala/akka/persistence/PersistentActorStashingSpec.scala

@@ -309,7 +309,5 @@ class SteppingInMemPersistentActorStashingSpec
 
 }
 
-class LeveldbPersistentActorStashingSpec
-    extends PersistentActorStashingSpec(PersistenceSpec.config("leveldb", "LeveldbPersistentActorStashingSpec"))
 class InmemPersistentActorStashingSpec
     extends PersistentActorStashingSpec(PersistenceSpec.config("inmem", "InmemPersistentActorStashingSpec"))

akka-persistence/src/test/scala/akka/persistence/SnapshotDirectoryFailureSpec.scala

@@ -31,7 +31,7 @@ object SnapshotDirectoryFailureSpec {
 class SnapshotDirectoryFailureSpec
     extends AkkaSpec(
       PersistenceSpec.config(
-        "leveldb",
+        "inmem",
         "SnapshotDirectoryFailureSpec",
         extraConfig = Some(s"""
   akka.persistence.snapshot-store.local.dir = "${SnapshotDirectoryFailureSpec.inUseSnapshotPath}"

akka-persistence/src/test/scala/akka/persistence/SnapshotFailureRobustnessSpec.scala

@@ -100,7 +100,7 @@ object SnapshotFailureRobustnessSpec {
 class SnapshotFailureRobustnessSpec
     extends PersistenceSpec(
       PersistenceSpec.config(
-        "leveldb",
+        "inmem",
         "SnapshotFailureRobustnessSpec",
         serialization = "off",
         extraConfig = Some(s"""

akka-persistence/src/test/scala/akka/persistence/SnapshotRecoveryWithEmptyJournalSpec.scala

@@ -63,7 +63,7 @@ object SnapshotRecoveryWithEmptyJournalSpec {
 class SnapshotRecoveryWithEmptyJournalSpec
     extends PersistenceSpec(
       PersistenceSpec.config(
-        "leveldb",
+        "inmem",
         "SnapshotRecoveryWithEmptyJournalSpec",
         extraConfig = Some(s"""
   akka.persistence.snapshot-store.local.dir = "${SnapshotRecoveryWithEmptyJournalSpec.survivingSnapshotPath}"

akka-persistence/src/test/scala/akka/persistence/SnapshotSerializationSpec.scala

@@ -68,7 +68,7 @@ object SnapshotSerializationSpec {
 class SnapshotSerializationSpec
     extends PersistenceSpec(
       PersistenceSpec.config(
-        "leveldb",
+        "inmem",
         "SnapshotSerializationSpec",
         serialization = "off",
         extraConfig = Some("""

akka-persistence/src/test/scala/akka/persistence/SnapshotSpec.scala

@@ -83,7 +83,7 @@ object SnapshotSpec {
   }
 }
 
-class SnapshotSpec extends PersistenceSpec(PersistenceSpec.config("leveldb", "SnapshotSpec")) with ImplicitSender {
+class SnapshotSpec extends PersistenceSpec(PersistenceSpec.config("inmem", "SnapshotSpec")) with ImplicitSender {
   import SnapshotProtocol._
   import SnapshotSpec._
 

akka-persistence/src/test/scala/akka/persistence/fsm/PersistentFSMSpec.scala

@@ -369,7 +369,7 @@ abstract class PersistentFSMSpec(config: Config) extends PersistenceSpec(config)
         ConfigFactory.parseString("""
             akka.persistence.fsm.enable-snapshot-after = on
             akka.persistence.fsm.snapshot-after = 3
-          """).withFallback(PersistenceSpec.config("leveldb", "PersistentFSMSpec2")))
+          """).withFallback(PersistenceSpec.config("inmem", "PersistentFSMSpec2")))
 
       try {
         val probe = TestProbe()
@@ -390,10 +390,7 @@ abstract class PersistentFSMSpec(config: Config) extends PersistenceSpec(config)
 
       } finally {
         val storageLocations =
-          List(
+          List("akka.persistence.snapshot-store.local.dir").map(s => new File(sys2.settings.config.getString(s)))
-            "akka.persistence.journal.leveldb.dir",
-            "akka.persistence.journal.leveldb-shared.store.dir",
-            "akka.persistence.snapshot-store.local.dir").map(s => new File(sys2.settings.config.getString(s)))
         shutdown(sys2)
         storageLocations.foreach(FileUtils.deleteDirectory)
       }
@@ -653,5 +650,4 @@ object PersistentFSMSpec {
 
 }
 
-class LeveldbPersistentFSMSpec extends PersistentFSMSpec(PersistenceSpec.config("leveldb", "PersistentFSMSpec"))
 class InmemPersistentFSMSpec extends PersistentFSMSpec(PersistenceSpec.config("inmem", "PersistentFSMSpec"))