!per #3704 Persistence improvements

- Channel enhancements (#3773):
- Live read models (#3776):
- Batch-oriented journal plugin API (#3804):
- Batching of confirmations and deletions
- Message deletion enhancements (more efficient range deletions)

akka-persistence/src/main/scala/akka/persistence/journal/japi/SyncWriteJournal.scala

@@ -7,19 +7,22 @@ package akka.persistence.journal.japi
 import scala.collection.immutable
 import scala.collection.JavaConverters._
 
+import akka.persistence._
 import akka.persistence.journal.{ SyncWriteJournal ⇒ SSyncWriteJournal }
-import akka.persistence.PersistentRepr
 
 /**
  * Java API: abstract journal, optimized for synchronous writes.
  */
-abstract class SyncWriteJournal extends AsyncReplay with SSyncWriteJournal with SyncWritePlugin {
-  final def write(persistentBatch: immutable.Seq[PersistentRepr]) =
-    doWrite(persistentBatch.asJava)
+abstract class SyncWriteJournal extends AsyncRecovery with SSyncWriteJournal with SyncWritePlugin {
+  final def writeMessages(messages: immutable.Seq[PersistentRepr]) =
+    doWriteMessages(messages.asJava)
 
-  final def delete(processorId: String, fromSequenceNr: Long, toSequenceNr: Long, permanent: Boolean) =
-    doDelete(processorId, fromSequenceNr, toSequenceNr, permanent)
+  final def writeConfirmations(confirmations: immutable.Seq[PersistentConfirmation]) =
+    doWriteConfirmations(confirmations.asJava)
 
-  final def confirm(processorId: String, sequenceNr: Long, channelId: String) =
-    doConfirm(processorId, sequenceNr, channelId)
+  final def deleteMessages(messageIds: immutable.Seq[PersistentId], permanent: Boolean) =
+    doDeleteMessages(messageIds.asJava, permanent)
+
+  final def deleteMessagesTo(processorId: String, toSequenceNr: Long, permanent: Boolean) =
+    doDeleteMessagesTo(processorId, toSequenceNr, permanent)
 }