GUI -- Major re-write of server-side Topology View code. WIP.
Change-Id: I332e8e59dc2271d3897c3a5c2fafa775324ef72d
diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/topo/TopoUiModelManager.java b/web/gui/src/main/java/org/onosproject/ui/impl/topo/TopoUiModelManager.java
new file mode 100644
index 0000000..95e8430
--- /dev/null
+++ b/web/gui/src/main/java/org/onosproject/ui/impl/topo/TopoUiModelManager.java
@@ -0,0 +1,206 @@
+/*
+ * 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.ui.impl.topo;
+
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import org.apache.felix.scr.annotations.Activate;
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Deactivate;
+import org.apache.felix.scr.annotations.Reference;
+import org.apache.felix.scr.annotations.ReferenceCardinality;
+import org.apache.felix.scr.annotations.Service;
+import org.onosproject.cluster.ClusterEvent;
+import org.onosproject.cluster.ClusterService;
+import org.onosproject.cluster.ControllerNode;
+import org.onosproject.event.AbstractListenerRegistry;
+import org.onosproject.event.EventDeliveryService;
+import org.onosproject.mastership.MastershipService;
+import org.onosproject.net.Device;
+import org.onosproject.net.Host;
+import org.onosproject.net.Link;
+import org.onosproject.net.device.DeviceEvent;
+import org.onosproject.net.device.DeviceService;
+import org.onosproject.net.host.HostEvent;
+import org.onosproject.net.host.HostService;
+import org.onosproject.net.link.LinkEvent;
+import org.onosproject.net.link.LinkService;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+
+import static org.onosproject.cluster.ClusterEvent.Type.INSTANCE_ADDED;
+import static org.onosproject.net.device.DeviceEvent.Type.DEVICE_ADDED;
+import static org.onosproject.net.host.HostEvent.Type.HOST_ADDED;
+import static org.onosproject.net.link.LinkEvent.Type.LINK_ADDED;
+
+
+/**
+ * Maintains a UI-centric model of the topology, as inferred from interactions
+ * with the different (device, host, link, ...) services. Will serve up this
+ * model to anyone who cares to {@link TopoUiListener listen}.
+ */
+@Component(immediate = true)
+@Service
+public class TopoUiModelManager implements TopoUiModelService {
+
+ private final Logger log = LoggerFactory.getLogger(getClass());
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+ protected ClusterService clusterService;
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+ protected DeviceService deviceService;
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+ protected LinkService linkService;
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+ protected HostService hostService;
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+ protected MastershipService mastershipService;
+
+
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+ protected EventDeliveryService eventDispatcher;
+
+
+ private AbstractListenerRegistry<TopoUiEvent, TopoUiListener>
+ listenerRegistry = new AbstractListenerRegistry<>();
+
+
+ private final TopoMessageFactory messageFactory = new TopoMessageFactory();
+ private final MetaDb metaDb = new MetaDb();
+
+
+ @Activate
+ public void activate() {
+ eventDispatcher.addSink(TopoUiEvent.class, listenerRegistry);
+ messageFactory.injectServices(
+ metaDb,
+ clusterService,
+ deviceService,
+ linkService,
+ hostService,
+ mastershipService
+ );
+ log.info("Started");
+ }
+
+ @Deactivate
+ public void deactivate() {
+ eventDispatcher.removeSink(TopoUiEvent.class);
+ log.info("Stopped");
+ }
+
+ @Override
+ public void addListener(TopoUiListener listener) {
+ listenerRegistry.addListener(listener);
+ }
+
+ @Override
+ public void removeListener(TopoUiListener listener) {
+ listenerRegistry.removeListener(listener);
+ }
+
+ @Override
+ public List<ObjectNode> getInitialState() {
+ List<ObjectNode> results = new ArrayList<>();
+ addInstances(results);
+ addDevices(results);
+ addLinks(results);
+ addHosts(results);
+ return results;
+ }
+
+ // =====================================================================
+
+ private static final Comparator<? super ControllerNode> NODE_COMPARATOR =
+ (o1, o2) -> o1.id().toString().compareTo(o2.id().toString());
+
+ // =====================================================================
+
+ private void addInstances(List<ObjectNode> results) {
+ List<ControllerNode> nodes = new ArrayList<>(clusterService.getNodes());
+ Collections.sort(nodes, NODE_COMPARATOR);
+ for (ControllerNode node : nodes) {
+ ClusterEvent ev = new ClusterEvent(INSTANCE_ADDED, node);
+ results.add(messageFactory.instanceMessage(ev));
+ }
+ }
+
+ private void addDevices(List<ObjectNode> results) {
+ // Send optical first, others later -- for layered rendering
+ List<DeviceEvent> deferred = new ArrayList<>();
+
+ for (Device device : deviceService.getDevices()) {
+ DeviceEvent ev = new DeviceEvent(DEVICE_ADDED, device);
+ if (device.type() == Device.Type.ROADM) {
+ results.add(messageFactory.deviceMessage(ev));
+ } else {
+ deferred.add(ev);
+ }
+ }
+
+ for (DeviceEvent ev : deferred) {
+ results.add(messageFactory.deviceMessage(ev));
+ }
+ }
+
+ private void addLinks(List<ObjectNode> results) {
+ // Send optical first, others later -- for layered rendering
+ List<LinkEvent> deferred = new ArrayList<>();
+
+ for (Link link : linkService.getLinks()) {
+ LinkEvent ev = new LinkEvent(LINK_ADDED, link);
+ if (link.type() == Link.Type.OPTICAL) {
+ results.add(messageFactory.linkMessage(ev));
+ } else {
+ deferred.add(ev);
+ }
+ }
+
+ for (LinkEvent ev : deferred) {
+ results.add(messageFactory.linkMessage(ev));
+ }
+ }
+
+ private void addHosts(List<ObjectNode> results) {
+ for (Host host : hostService.getHosts()) {
+ HostEvent ev = new HostEvent(HOST_ADDED, host);
+ results.add(messageFactory.hostMessage(ev));
+ }
+ }
+
+ // =====================================================================
+
+ private void post(TopoUiEvent event) {
+ if (event != null) {
+ eventDispatcher.post(event);
+ }
+ }
+
+ // NOTE: session-independent state only
+ // private inner classes to listen to device/host/link events
+ // TODO..
+}