Added a AtomicValue distributed primitive.

Change-Id: I00ff165cbd9c6e4f2610af9877ff262527b7b048
diff --git a/core/store/dist/src/main/java/org/onosproject/store/consistent/impl/DefaultAtomicValueBuilder.java b/core/store/dist/src/main/java/org/onosproject/store/consistent/impl/DefaultAtomicValueBuilder.java
new file mode 100644
index 0000000..a267de0
--- /dev/null
+++ b/core/store/dist/src/main/java/org/onosproject/store/consistent/impl/DefaultAtomicValueBuilder.java
@@ -0,0 +1,63 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.store.consistent.impl;
+
+import org.onosproject.store.serializers.KryoNamespaces;
+import org.onosproject.store.service.AtomicValue;
+import org.onosproject.store.service.AtomicValueBuilder;
+import org.onosproject.store.service.ConsistentMapBuilder;
+import org.onosproject.store.service.Serializer;
+
+/**
+ * Default implementation of AtomicValueBuilder.
+ *
+ * @param <V> value type
+ */
+public class DefaultAtomicValueBuilder<V> implements AtomicValueBuilder<V> {
+
+    private Serializer serializer;
+    private String name;
+    private ConsistentMapBuilder<String, byte[]> mapBuilder;
+
+    public DefaultAtomicValueBuilder(DatabaseManager manager) {
+        mapBuilder = manager.<String, byte[]>consistentMapBuilder()
+                            .withName("onos-atomic-values")
+                            .withSerializer(Serializer.using(KryoNamespaces.BASIC));
+    }
+
+    @Override
+    public AtomicValueBuilder<V> withName(String name) {
+        this.name = name;
+        return this;
+    }
+
+    @Override
+    public AtomicValueBuilder<V> withSerializer(Serializer serializer) {
+        this.serializer = serializer;
+        return this;
+    }
+
+    @Override
+    public AtomicValueBuilder<V> withPartitionsDisabled() {
+        mapBuilder.withPartitionsDisabled();
+        return this;
+    }
+
+    @Override
+    public AtomicValue<V> build() {
+        return new DefaultAtomicValue<>(mapBuilder.build(), name, serializer);
+    }
+}
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