minor name changes and javadoc

Change-Id: I43a05d75392efad9ac004867027a31adcc18c6f5

@@ -58,4 +58,12 @@ public interface AsyncAtomicCounter {
      * @return current value
      */
     CompletableFuture<Long> get();
+
+
+    /**
+     * Atomically sets the given value to the current value.
+     *
+     * @return future void
+     */
+    CompletableFuture<Void> set(long value);
 }

@@ -51,6 +51,14 @@ public interface AtomicCounter {
     long addAndGet(long delta);
 
     /**
+     * Atomically sets the given value to the current value.
+     *
+     * @param value the value to set
+     */
+    void set(long value);
+
+
+    /**
      * Returns the current value of the counter without modifying it.
      *
      * @return current value

@@ -48,6 +48,11 @@ public final class TestAtomicCounter implements AtomicCounter {
     }
 
     @Override
+    public void set(long value) {
+        this.value.set(value);
+    }
+
+    @Override
     public long get() {
         return value.get();
     }

@@ -45,6 +45,7 @@ public interface DatabaseProxy<K, V> {
 
     /**
      * Returns the number of entries in map.
+     *
      * @param mapName map name
      * @return A completable future to be completed with the result once complete.
      */
@@ -148,6 +149,16 @@ public interface DatabaseProxy<K, V> {
      */
     CompletableFuture<Long> counterGetAndAdd(String counterName, long delta);
 
+
+    /**
+     * Atomically sets the given value to current value of the specified counter.
+     *
+     * @param counterName counter name
+     * @param value       value to set
+     * @return void future
+     */
+    CompletableFuture<Void> counterSet(String counterName, long value);
+
     /**
      * Returns the current value of the specified atomic counter.
      *
@@ -158,6 +169,7 @@ public interface DatabaseProxy<K, V> {
 
     /**
      * Returns the size of queue.
+     *
      * @param queueName queue name
      * @return queue size
      */
@@ -165,6 +177,7 @@ public interface DatabaseProxy<K, V> {
 
     /**
      * Inserts an entry into the queue.
+     *
      * @param queueName queue name
      * @param entry     queue entry
      * @return void future
@@ -173,6 +186,7 @@ public interface DatabaseProxy<K, V> {
 
     /**
      * Removes an entry from the queue if the queue is non-empty.
+     *
      * @param queueName queue name
      * @return entry future. Can be completed with null if queue is empty
      */
@@ -180,6 +194,7 @@ public interface DatabaseProxy<K, V> {
 
     /**
      * Returns but does not remove an entry from the queue.
+     *
      * @param queueName queue name
      * @return entry. Can be null if queue is empty
      */

@@ -18,6 +18,7 @@ package org.onosproject.store.consistent.impl;
 import org.onosproject.store.service.AsyncAtomicCounter;
 
 import java.util.concurrent.CompletableFuture;
+
 import static com.google.common.base.Preconditions.checkNotNull;
 
 /**
@@ -38,6 +39,7 @@ public class DefaultAsyncAtomicCounter implements AsyncAtomicCounter {
     private static final String GET_AND_ADD = "getAndAdd";
     private static final String ADD_AND_GET = "addAndGet";
     private static final String GET = "get";
+    private static final String SET = "set";
 
     public DefaultAsyncAtomicCounter(String name,
                                      Database database,
@@ -81,4 +83,11 @@ public class DefaultAsyncAtomicCounter implements AsyncAtomicCounter {
         return database.counterAddAndGet(name, delta)
                 .whenComplete((r, e) -> timer.stop(e));
     }
+
+    @Override
+    public CompletableFuture<Void> set(long value) {
+        final MeteringAgent.Context timer = monitor.startTimer(SET);
+        return database.counterSet(name, value)
+                .whenComplete((r, e) -> timer.stop(e));
+    }
 }

@@ -63,6 +63,11 @@ public class DefaultAtomicCounter implements AtomicCounter {
     }
 
     @Override
+    public void set(long value) {
+        complete(asyncCounter.set(value));
+    }
+
+    @Override
     public long get() {
         return complete(asyncCounter.get());
     }

@@ -44,7 +44,7 @@ public class DefaultDatabase extends AbstractResource<Database> implements Datab
     private final Set<Consumer<StateMachineUpdate>> consumers = Sets.newCopyOnWriteArraySet();
     private final TriConsumer<String, Object, Object> watcher = new InternalStateMachineWatcher();
 
-    @SuppressWarnings({ "unchecked", "rawtypes" })
+    @SuppressWarnings({"unchecked", "rawtypes"})
     public DefaultDatabase(ResourceManager context) {
         super(context);
         this.stateMachine = new DefaultStateMachine(context,
@@ -153,6 +153,11 @@ public class DefaultDatabase extends AbstractResource<Database> implements Datab
     }
 
     @Override
+    public CompletableFuture<Void> counterSet(String counterName, long value) {
+        return checkOpen(() -> proxy.counterSet(counterName, value));
+    }
+
+    @Override
     public CompletableFuture<Long> queueSize(String queueName) {
         return checkOpen(() -> proxy.queueSize(queueName));
     }

@@ -220,6 +220,11 @@ public class PartitionedDatabase implements Database {
         return partitioner.getPartition(counterName, counterName).counterGetAndAdd(counterName, delta);
     }
 
+    @Override
+    public CompletableFuture<Void> counterSet(String counterName, long value) {
+        checkState(isOpen.get(), DB_NOT_OPEN);
+        return partitioner.getPartition(counterName, counterName).counterSet(counterName, value);
+    }
 
     @Override
     public CompletableFuture<Long> queueSize(String queueName) {
@@ -384,3 +389,4 @@ public class PartitionedDatabase implements Database {
         partitions.forEach(p -> p.unregisterConsumer(consumer));
     }
 }
+