ONOS-6258: UiTopo2Overlay et al.
- revert DriverMatrix app.
- simplify overlay base class to be consistent with classic topo
- add topo2overlay and topo2traffic (skeleton code for now)

Change-Id: I88fda4d7b75807bd08637d846a869846a364c1f8
diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/UiExtensionManager.java b/web/gui/src/main/java/org/onosproject/ui/impl/UiExtensionManager.java
index 02d0808..6bab13e 100644
--- a/web/gui/src/main/java/org/onosproject/ui/impl/UiExtensionManager.java
+++ b/web/gui/src/main/java/org/onosproject/ui/impl/UiExtensionManager.java
@@ -50,12 +50,14 @@
 import org.onosproject.ui.UiExtensionService;
 import org.onosproject.ui.UiMessageHandlerFactory;
 import org.onosproject.ui.UiPreferencesService;
+import org.onosproject.ui.UiTopo2OverlayFactory;
 import org.onosproject.ui.UiTopoMap;
 import org.onosproject.ui.UiTopoMapFactory;
 import org.onosproject.ui.UiTopoOverlayFactory;
 import org.onosproject.ui.UiView;
 import org.onosproject.ui.UiViewHidden;
 import org.onosproject.ui.impl.topo.Topo2ViewMessageHandler;
+import org.onosproject.ui.impl.topo.Traffic2Overlay;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -172,6 +174,11 @@
                         new ProtectedIntentOverlay()
                 );
 
+        UiTopo2OverlayFactory topo2OverlayFactory =
+                () -> ImmutableList.of(
+                        new Traffic2Overlay()
+                );
+
         UiTopoMapFactory topoMapFactory =
                 () -> ImmutableList.of(
                         new UiTopoMap("australia", "Australia", "*australia", 1.0),
@@ -194,6 +201,7 @@
         return new UiExtension.Builder(CL, coreViews)
                 .messageHandlerFactory(messageHandlerFactory)
                 .topoOverlayFactory(topoOverlayFactory)
+                .topo2OverlayFactory(topo2OverlayFactory)
                 .topoMapFactory(topoMapFactory)
                 .resourcePath(CORE)
                 .build();
@@ -202,11 +210,11 @@
     @Activate
     public void activate() {
         Serializer serializer = Serializer.using(KryoNamespaces.API,
-                ObjectNode.class, ArrayNode.class,
-                JsonNodeFactory.class, LinkedHashMap.class,
-                TextNode.class, BooleanNode.class,
-                LongNode.class, DoubleNode.class, ShortNode.class,
-                IntNode.class, NullNode.class);
+                     ObjectNode.class, ArrayNode.class,
+                     JsonNodeFactory.class, LinkedHashMap.class,
+                     TextNode.class, BooleanNode.class,
+                     LongNode.class, DoubleNode.class, ShortNode.class,
+                     IntNode.class, NullNode.class);
 
         prefsConsistentMap = storageService.<String, ObjectNode>consistentMapBuilder()
                 .withName(ONOS_USER_PREFERENCES)
diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/topo/Topo2OverlayCache.java b/web/gui/src/main/java/org/onosproject/ui/impl/topo/Topo2OverlayCache.java
index 1c05acf..b95aeaf 100644
--- a/web/gui/src/main/java/org/onosproject/ui/impl/topo/Topo2OverlayCache.java
+++ b/web/gui/src/main/java/org/onosproject/ui/impl/topo/Topo2OverlayCache.java
@@ -135,12 +135,7 @@
     // overlay instance representing "no overlay selected"
     private static class NullOverlay extends UiTopo2Overlay {
         NullOverlay() {
-            super(EMPTY, NO_OVERLAY);
-        }
-
-        @Override
-        public String glyphId() {
-            return UNKNOWN;
+            super(EMPTY);
         }
     }
 }
diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/topo/Topo2ViewMessageHandler.java b/web/gui/src/main/java/org/onosproject/ui/impl/topo/Topo2ViewMessageHandler.java
index 1763048..b30ff11 100644
--- a/web/gui/src/main/java/org/onosproject/ui/impl/topo/Topo2ViewMessageHandler.java
+++ b/web/gui/src/main/java/org/onosproject/ui/impl/topo/Topo2ViewMessageHandler.java
@@ -16,14 +16,12 @@
 
 package org.onosproject.ui.impl.topo;
 
-import com.fasterxml.jackson.databind.node.ArrayNode;
 import com.fasterxml.jackson.databind.node.ObjectNode;
 import com.google.common.collect.ImmutableSet;
 import org.onlab.osgi.ServiceDirectory;
 import org.onosproject.ui.RequestHandler;
 import org.onosproject.ui.UiConnection;
 import org.onosproject.ui.UiMessageHandler;
-import org.onosproject.ui.UiTopo2Overlay;
 import org.onosproject.ui.impl.UiWebSocket;
 import org.onosproject.ui.model.topo.UiClusterMember;
 import org.onosproject.ui.model.topo.UiNode;
@@ -129,23 +127,6 @@
         return peersPayload;
     }
 
-    private ObjectNode mkOverlaysMessage() {
-        ArrayNode a = arrayNode();
-        for (UiTopo2Overlay ov : overlay2Cache.list()) {
-            a.add(json(ov));
-        }
-        ObjectNode payload = objectNode();
-        payload.set("overlays", a);
-        return payload;
-    }
-
-    private ObjectNode json(UiTopo2Overlay ov) {
-        return objectNode()
-                .put("id", ov.id())
-                .put("name", ov.name())
-                .put("gid", ov.glyphId());
-    }
-
     // ==================================================================
 
 
@@ -186,9 +167,6 @@
 
             // these are the regions/devices that are siblings to this region
             sendMessage(PEER_REGIONS, mkPeersMessage(currentLayout));
-
-            // these are the registered overlays
-            sendMessage(OVERLAYS, mkOverlaysMessage());
         }
     }
 
diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/topo/Traffic2Overlay.java b/web/gui/src/main/java/org/onosproject/ui/impl/topo/Traffic2Overlay.java
new file mode 100644
index 0000000..a4dba20
--- /dev/null
+++ b/web/gui/src/main/java/org/onosproject/ui/impl/topo/Traffic2Overlay.java
@@ -0,0 +1,46 @@
+/*
+ * 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.ui.impl.topo;
+
+import org.onosproject.ui.UiTopo2Overlay;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Traffic overlay for topology 2 view.
+ */
+public class Traffic2Overlay extends UiTopo2Overlay {
+
+    private final Logger log = LoggerFactory.getLogger(getClass());
+
+    // NOTE: this must match the ID defined in topo2TrafficOverlay.js
+    private static final String OVERLAY_ID = "traffic-2-overlay";
+
+    /**
+     * Creates a traffic overlay instance.
+     */
+    public Traffic2Overlay() {
+        super(OVERLAY_ID);
+    }
+
+    @Override
+    public void highlightingCallback() {
+        log.debug("highlightingCallback() invoked");
+        // TODO: implement
+    }
+}