+per #15587 Make it possible to use multiple persistence plugins

akka-docs/rst/java/code/docs/persistence/PersistenceMultiDocTest.java

@@ -0,0 +1,31 @@
+/**
+ * Copyright (C) 2009-2014 Typesafe Inc. <http://www.typesafe.com>
+ */
+
+package docs.persistence;
+
+import akka.persistence.UntypedPersistentActor;
+
+public class PersistenceMultiDocTest {
+
+    //#default-plugins
+    abstract class ActorWithDefaultPlugins extends UntypedPersistentActor {
+        @Override
+        public String persistenceId() { return "123"; }
+    }
+    //#default-plugins
+
+    //#override-plugins
+    abstract class ActorWithOverridePlugins extends UntypedPersistentActor {
+        @Override
+        public String persistenceId() { return "123"; }
+        // Absolute path to the journal plugin configuration entry in the `reference.conf`
+        @Override
+        public String journalPluginId() { return "akka.persistence.chronicle.journal"; }
+        // Absolute path to the snapshot store plugin configuration entry in the `reference.conf`
+        @Override
+        public String snapshotPluginId() { return "akka.persistence.chronicle.snapshot-store"; }
+    }
+    //#override-plugins
+
+}

akka-docs/rst/java/lambda-persistence.rst

@@ -614,3 +614,25 @@ or
 .. includecode:: ../scala/code/docs/persistence/PersistencePluginDocSpec.scala#shared-store-native-config
 
 in your Akka configuration. The LevelDB Java port is for testing purposes only.
+
+Multiple persistence plugin configurations
+==========================================
+
+By default, persistent actor or view will use "default" journal and snapshot store plugins
+configured in the following sections of the ``reference.conf`` configuration resource:
+
+.. includecode:: ../scala/code/docs/persistence/PersistenceMultiDocSpec.scala#default-config
+
+Note that in this case actor or view overrides only ``persistenceId`` method:
+
+.. includecode:: ../java/code/docs/persistence/PersistenceMultiDocTest.java#default-plugins
+
+When persistent actor or view overrides ``journalPluginId`` and ``snapshotPluginId`` methods, 
+the actor or view will be serviced by these specific persistence plugins instead of the defaults:
+
+.. includecode:: ../java/code/docs/persistence/PersistenceMultiDocTest.java#override-plugins
+
+Note that ``journalPluginId`` and ``snapshotPluginId`` must refer to properly configured ``reference.conf``
+plugin entires with standard ``class`` property as well as settings which are specific for those plugins, i.e.: 
+
+.. includecode:: ../scala/code/docs/persistence/PersistenceMultiDocSpec.scala#override-config

akka-docs/rst/java/persistence.rst

@@ -667,3 +667,24 @@ Configuration
 There are several configuration properties for the persistence module, please refer
 to the :ref:`reference configuration <config-akka-persistence>`.
 
+Multiple persistence plugin configurations
+==========================================
+
+By default, persistent actor or view will use "default" journal and snapshot store plugins
+configured in the following sections of the ``reference.conf`` configuration resource:
+
+.. includecode:: ../scala/code/docs/persistence/PersistenceMultiDocSpec.scala#default-config
+
+Note that in this case actor or view overrides only ``persistenceId`` method:
+
+.. includecode:: ../java/code/docs/persistence/PersistenceMultiDocTest.java#default-plugins
+
+When persistent actor or view overrides ``journalPluginId`` and ``snapshotPluginId`` methods, 
+the actor or view will be serviced by these specific persistence plugins instead of the defaults:
+
+.. includecode:: ../java/code/docs/persistence/PersistenceMultiDocTest.java#override-plugins
+
+Note that ``journalPluginId`` and ``snapshotPluginId`` must refer to properly configured ``reference.conf``
+plugin entires with standard ``class`` property as well as settings which are specific for those plugins, i.e.: 
+
+.. includecode:: ../scala/code/docs/persistence/PersistenceMultiDocSpec.scala#override-config

akka-docs/rst/project/migration-guide-persistence-experimental-2.3.x-2.4.x.rst

@@ -178,8 +178,3 @@ persistent actor on the sending side.
 
 Read more about at-least-once delivery in the :ref:`documentation for Scala <at-least-once-delivery>` and 
 :ref:`documentation for Java <at-least-once-delivery-java>`.  
-
-
-
-
-   

akka-docs/rst/scala/code/docs/persistence/PersistenceMultiDocSpec.scala

@@ -0,0 +1,57 @@
+/**
+ * Copyright (C) 2009-2014 Typesafe Inc. <http://www.typesafe.com>
+ */
+
+import akka.persistence.PersistentActor
+
+object PersistenceMultiDocSpec {
+
+  val DefaultConfig = """
+  //#default-config
+  # Absolute path to the default journal plugin configuration entry.
+  akka.persistence.journal.plugin = "akka.persistence.journal.inmem"
+  # Absolute path to the default snapshot store plugin configuration entry.
+  akka.persistence.snapshot-store.plugin = "akka.persistence.snapshot-store.local"
+  //#default-config
+  """
+
+  //#default-plugins
+  trait ActorWithDefaultPlugins extends PersistentActor {
+    override def persistenceId = "123"
+  }
+  //#default-plugins
+
+  val OverrideConfig = """
+  //#override-config
+  # Configuration entry for the custom journal plugin, see `journalPluginId`.
+  akka.persistence.chronicle.journal {
+    # Standard persistence extension property: provider FQCN.
+    class = "akka.persistence.chronicle.ChronicleSyncJournal"
+    # Custom setting specific for the journal `ChronicleSyncJournal`.
+    folder = ${user.dir}/store/journal
+    # Standard persistence extension property: plugin actor uses config injection.
+    inject-config = true
+  } 
+  # Configuration entry for the custom snapshot store plugin, see `snapshotPluginId`.
+  akka.persistence.chronicle.snapshot-store {
+    # Standard persistence extension property: provider FQCN.
+    class = "akka.persistence.chronicle.ChronicleSnapshotStore"
+    # Custom setting specific for the snapshot store `ChronicleSnapshotStore`.
+    folder = ${user.dir}/store/snapshot
+    # Standard persistence extension property: plugin actor uses config injection.
+    inject-config = true
+  }
+  //#override-config
+  """
+
+  //#override-plugins
+  trait ActorWithOverridePlugins extends PersistentActor {
+    override def persistenceId = "123"
+    // Absolute path to the journal plugin configuration entry in the `reference.conf`.
+    override def journalPluginId = "akka.persistence.chronicle.journal"
+    // Absolute path to the snapshot store plugin configuration entry in the `reference.conf`.
+    override def snapshotPluginId = "akka.persistence.chronicle.snapshot-store"
+  }
+  //#override-plugins
+
+}

akka-docs/rst/scala/persistence.rst

@@ -669,3 +669,24 @@ Configuration
 There are several configuration properties for the persistence module, please refer
 to the :ref:`reference configuration <config-akka-persistence>`.
 
+Multiple persistence plugin configurations
+==========================================
+
+By default, persistent actor or view will use "default" journal and snapshot store plugins
+configured in the following sections of the ``reference.conf`` configuration resource:
+
+.. includecode:: code/docs/persistence/PersistenceMultiDocSpec.scala#default-config
+
+Note that in this case actor or view overrides only ``persistenceId`` method:
+
+.. includecode:: code/docs/persistence/PersistenceMultiDocSpec.scala#default-plugins
+
+When persistent actor or view overrides ``journalPluginId`` and ``snapshotPluginId`` methods, 
+the actor or view will be serviced by these specific persistence plugins instead of the defaults:
+
+.. includecode:: code/docs/persistence/PersistenceMultiDocSpec.scala#override-plugins
+
+Note that ``journalPluginId`` and ``snapshotPluginId`` must refer to properly configured ``reference.conf``
+plugin entires with standard ``class`` property as well as settings which are specific for those plugins, i.e.: 
+
+.. includecode:: code/docs/persistence/PersistenceMultiDocSpec.scala#override-config