[ONOS-6594] Upgrade to Atomix 2.0.0

Change-Id: I6534bca1c8570b4e017f682953b876da29146675
diff --git a/core/store/primitives/src/main/java/org/onosproject/store/primitives/resources/impl/AtomixConsistentTreeMapEvents.java b/core/store/primitives/src/main/java/org/onosproject/store/primitives/resources/impl/AtomixConsistentTreeMapEvents.java
new file mode 100644
index 0000000..ab3b972
--- /dev/null
+++ b/core/store/primitives/src/main/java/org/onosproject/store/primitives/resources/impl/AtomixConsistentTreeMapEvents.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2017-present 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.primitives.resources.impl;
+
+import io.atomix.protocols.raft.event.EventType;
+import org.onlab.util.KryoNamespace;
+import org.onosproject.store.serializers.KryoNamespaces;
+import org.onosproject.store.service.MapEvent;
+
+/**
+ * Atomix consistent tree map events.
+ */
+public enum AtomixConsistentTreeMapEvents implements EventType {
+    CHANGE("change");
+
+    private final String id;
+
+    AtomixConsistentTreeMapEvents(String id) {
+        this.id = id;
+    }
+
+    @Override
+    public String id() {
+        return id;
+    }
+
+    public static final KryoNamespace NAMESPACE = KryoNamespace.newBuilder()
+            .nextId(KryoNamespaces.BEGIN_USER_CUSTOM_ID + 50)
+            .register(MapEvent.class)
+            .register(MapEvent.Type.class)
+            .build("AtomixConsistentTreeMapEvents");
+}