Refactoring to eliminate a split package issue in onos-core-primitives.

Change-Id: I48ff6fe62ae006906674aae1f69e015395f042fc
diff --git a/core/store/primitives/src/main/java/org/onosproject/store/atomix/primitives/impl/AtomixDistributedLockBuilder.java b/core/store/primitives/src/main/java/org/onosproject/store/atomix/primitives/impl/AtomixDistributedLockBuilder.java
new file mode 100644
index 0000000..797847e
--- /dev/null
+++ b/core/store/primitives/src/main/java/org/onosproject/store/atomix/primitives/impl/AtomixDistributedLockBuilder.java
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+ *
+ * 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.atomix.primitives.impl;
+
+import io.atomix.core.Atomix;
+import io.atomix.primitive.Recovery;
+import io.atomix.protocols.raft.MultiRaftProtocol;
+import org.onosproject.store.service.AsyncDistributedLock;
+import org.onosproject.store.service.DistributedLockBuilder;
+
+/**
+ * Default {@link org.onosproject.store.service.AsyncDistributedLock} builder.
+ */
+public class AtomixDistributedLockBuilder extends DistributedLockBuilder {
+    private static final int MAX_RETRIES = 5;
+    private final Atomix atomix;
+    private final String group;
+
+    public AtomixDistributedLockBuilder(Atomix atomix, String group) {
+        this.atomix = atomix;
+        this.group = group;
+    }
+
+    @Override
+    public AsyncDistributedLock build() {
+        return new AtomixDistributedLock(atomix.atomicLockBuilder(name())
+            .withProtocol(MultiRaftProtocol.builder(group)
+                .withRecoveryStrategy(Recovery.RECOVER)
+                .withMaxRetries(MAX_RETRIES)
+                .build())
+            .withReadOnly(readOnly())
+            .withSerializer(new AtomixSerializerAdapter(serializer()))
+            .build()
+            .async());
+    }
+}
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