Migrate ShardDataTree to use OptionalLong

This prevents boxing and is more modern than Guava's Optional<Long>.

Change-Id: Iaef3b7f18527f532ed2d775641cd855b14087fc1
Signed-off-by: Robert Varga <robert.varga@pantheon.tech>

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/Shard.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/Shard.java
index 8f78d0eb83579c3f78c910ca5776729c9724b3ae..6a05d25fe5b91adbb58a5539c8b5e09613a6e101 100644 (file)
--- a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/Shard.java
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/Shard.java
@@ -32,6 +32,7 @@ import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
+import java.util.OptionalLong;
 import java.util.concurrent.TimeUnit;
 import org.eclipse.jdt.annotation.NonNull;
 import org.eclipse.jdt.annotation.Nullable;
@@ -413,22 +414,22 @@ public class Shard extends RaftActor {
         requestMessageAssembler.checkExpiredAssembledMessageState();
     }
 
-    private Optional<Long> updateAccess(final SimpleShardDataTreeCohort cohort) {
+    private OptionalLong updateAccess(final SimpleShardDataTreeCohort cohort) {
         final FrontendIdentifier frontend = cohort.getIdentifier().getHistoryId().getClientId().getFrontendId();
         final LeaderFrontendState state = knownFrontends.get(frontend);
         if (state == null) {
             // Not tell-based protocol, do nothing
-            return Optional.absent();
+            return OptionalLong.empty();
         }
 
         if (isIsolatedLeader()) {
             // We are isolated and no new request can come through until we emerge from it. We are still updating
             // liveness of frontend when we see it attempting to communicate. Use the last access timer.
-            return Optional.of(state.getLastSeenTicks());
+            return OptionalLong.of(state.getLastSeenTicks());
         }
 
         // If this frontend has freshly connected, give it some time to catch up before killing its transactions.
-        return Optional.of(state.getLastConnectTicks());
+        return OptionalLong.of(state.getLastConnectTicks());
     }
 
     private void disableTracking(final DisableTrackingPayload payload) {

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/ShardDataTree.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/ShardDataTree.java
index 32e8f9579c45b803b6dd16798c2ee06b46ba9685..5c94a8e36161bdd7fc1f9180bc9481e45565aba1 100644 (file)
--- a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/ShardDataTree.java
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/ShardDataTree.java
@@ -33,6 +33,7 @@ import java.util.HashMap;
 import java.util.Iterator;
 import java.util.Map;
 import java.util.Map.Entry;
+import java.util.OptionalLong;
 import java.util.Queue;
 import java.util.SortedSet;
 import java.util.concurrent.TimeUnit;
@@ -1106,7 +1107,7 @@ public class ShardDataTree extends ShardDataTreeTransactionParent {
 
     @SuppressFBWarnings(value = "DB_DUPLICATE_SWITCH_CLAUSES", justification = "See inline comments below.")
     void checkForExpiredTransactions(final long transactionCommitTimeoutMillis,
-            final Function<SimpleShardDataTreeCohort, Optional<Long>> accessTimeUpdater) {
+            final Function<SimpleShardDataTreeCohort, OptionalLong> accessTimeUpdater) {
         final long timeout = TimeUnit.MILLISECONDS.toNanos(transactionCommitTimeoutMillis);
         final long now = readTime();
 
@@ -1124,9 +1125,9 @@ public class ShardDataTree extends ShardDataTreeTransactionParent {
             return;
         }
 
-        final Optional<Long> updateOpt = accessTimeUpdater.apply(currentTx.cohort);
+        final OptionalLong updateOpt = accessTimeUpdater.apply(currentTx.cohort);
         if (updateOpt.isPresent()) {
-            final long newAccess =  updateOpt.get().longValue();
+            final long newAccess =  updateOpt.getAsLong();
             final long newDelta = now - newAccess;
             if (newDelta < delta) {
                 LOG.debug("{}: Updated current transaction {} access time", logContext,