Clean up SnapshotManager nested classes

Upgraded checkstyle is detecting a number of these as 'should be final'.
Fix those findings.

Change-Id: I171c046616a0b0c30f5cd46de0d3486e9943e757
Signed-off-by: Robert Varga <robert.varga@pantheon.tech>
(cherry picked from commit 44bd251909ae479ccf452f6d4f4ca36d9e478d6d)

diff --git a/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/SnapshotManager.java b/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/SnapshotManager.java
index 8037fb8d73ce88e6309f6a0f56b6d4fb787e8761..7d6de9533a24481d1c820425abbfa06f951975dd 100644 (file)
--- a/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/SnapshotManager.java
+++ b/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/SnapshotManager.java
@@ -195,7 +195,7 @@ public class SnapshotManager implements SnapshotState {
                 newReplicatedToAllIndex, newReplicatedToAllTerm, unAppliedEntries, mandatoryTrim);
     }
 
-    private class AbstractSnapshotState implements SnapshotState {
+    private abstract class AbstractSnapshotState implements SnapshotState {
 
         @Override
         public boolean isCapturing() {
@@ -282,8 +282,7 @@ public class SnapshotManager implements SnapshotState {
         }
     }
 
-    private class Idle extends AbstractSnapshotState {
-
+    private final class Idle extends AbstractSnapshotState {
         @Override
         public boolean isCapturing() {
             return false;
@@ -360,8 +359,7 @@ public class SnapshotManager implements SnapshotState {
         }
     }
 
-    private class Creating extends AbstractSnapshotState {
-
+    private final class Creating extends AbstractSnapshotState {
         @Override
         public void persist(final Snapshot.State snapshotState, final Optional<OutputStream> installSnapshotStream,
                 final long totalMemory) {
@@ -463,8 +461,7 @@ public class SnapshotManager implements SnapshotState {
 
     }
 
-    private class Persisting extends AbstractSnapshotState {
-
+    private final class Persisting extends AbstractSnapshotState {
         @Override
         @SuppressWarnings("checkstyle:IllegalCatch")
         public void commit(final long sequenceNumber, final long timeStamp) {
@@ -543,7 +540,7 @@ public class SnapshotManager implements SnapshotState {
         long getTerm();
     }
 
-    static class LastAppliedTermInformationReader implements TermInformationReader {
+    static final class LastAppliedTermInformationReader implements TermInformationReader {
         private long index;
         private long term;
 
@@ -580,7 +577,7 @@ public class SnapshotManager implements SnapshotState {
         }
     }
 
-    private static class ReplicatedToAllTermInformationReader implements TermInformationReader {
+    private static final class ReplicatedToAllTermInformationReader implements TermInformationReader {
         private long index;
         private long term;