ONOS-6889 Move mcast from incubator to core

Change-Id: Icfc7294e7017b640321dd9343778cd11c2cd0cb8
diff --git a/core/store/dist/src/main/java/org/onosproject/store/mcast/impl/DistributedMcastStore.java b/core/store/dist/src/main/java/org/onosproject/store/mcast/impl/DistributedMcastStore.java
new file mode 100644
index 0000000..8a3db91
--- /dev/null
+++ b/core/store/dist/src/main/java/org/onosproject/store/mcast/impl/DistributedMcastStore.java
@@ -0,0 +1,194 @@
+/*
+ * Copyright 2015-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.mcast.impl;
+
+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.onlab.util.KryoNamespace;
+import org.onosproject.net.ConnectPoint;
+import org.onosproject.net.mcast.McastEvent;
+import org.onosproject.net.mcast.McastRoute;
+import org.onosproject.net.mcast.McastStore;
+import org.onosproject.net.mcast.McastStoreDelegate;
+import org.onosproject.store.AbstractStore;
+import org.onosproject.store.serializers.KryoNamespaces;
+import org.onosproject.store.service.ConsistentMap;
+import org.onosproject.store.service.Serializer;
+import org.onosproject.store.service.StorageService;
+import org.slf4j.Logger;
+
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.atomic.AtomicReference;
+
+import static org.onosproject.net.mcast.McastRouteInfo.mcastRouteInfo;
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * A distributed mcast store implementation. Routes are stored consistently
+ * across the cluster.
+ */
+@Component(immediate = true)
+@Service
+public class DistributedMcastStore extends AbstractStore<McastEvent, McastStoreDelegate>
+        implements McastStore {
+    //FIXME the number of events that will potentially be generated here is
+    // not sustainable, consider changing this to an eventually consistent
+    // map and not emitting events but rather use a provider-like mechanism
+    // to program the dataplane.
+
+    private static final String MCASTRIB = "onos-mcast-rib-table";
+    private Logger log = getLogger(getClass());
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected StorageService storageService;
+
+    protected ConsistentMap<McastRoute, MulticastData> mcastRib;
+    protected Map<McastRoute, MulticastData> mcastRoutes;
+
+
+    @Activate
+    public void activate() {
+
+        mcastRib = storageService.<McastRoute, MulticastData>consistentMapBuilder()
+                .withName(MCASTRIB)
+                .withSerializer(Serializer.using(KryoNamespace.newBuilder()
+                                                         .register(KryoNamespaces.API)
+                                                         .register(
+                                                                 AtomicReference.class,
+                                                                 MulticastData.class,
+                                                                 McastRoute.class,
+                                                                 McastRoute.Type.class
+                                                         ).build()))
+                //.withRelaxedReadConsistency()
+                .build();
+
+        mcastRoutes = mcastRib.asJavaMap();
+
+
+        log.info("Started");
+    }
+
+    @Deactivate
+    public void deactivate() {
+        log.info("Stopped");
+    }
+
+    @Override
+    public void storeRoute(McastRoute route, Type operation) {
+        switch (operation) {
+            case ADD:
+                if (mcastRoutes.putIfAbsent(route, MulticastData.empty()) == null) {
+                    notifyDelegate(new McastEvent(McastEvent.Type.ROUTE_ADDED,
+                                                  mcastRouteInfo(route)));
+                }
+                break;
+            case REMOVE:
+                if (mcastRoutes.remove(route) != null) {
+                    notifyDelegate(new McastEvent(McastEvent.Type.ROUTE_REMOVED,
+                                                  mcastRouteInfo(route)));
+                }
+                break;
+            default:
+                log.warn("Unknown mcast operation type: {}", operation);
+        }
+    }
+
+    @Override
+    public void storeSource(McastRoute route, ConnectPoint source) {
+        MulticastData data = mcastRoutes.compute(route, (k, v) -> {
+            if (v == null) {
+                return new MulticastData(source);
+            } else {
+                v.setSource(source);
+            }
+            return v;
+        });
+
+
+        if (data != null) {
+            notifyDelegate(new McastEvent(McastEvent.Type.SOURCE_ADDED,
+                                          mcastRouteInfo(route,
+                                                         data.sinks(),
+                                                         source)));
+        }
+
+    }
+
+    @Override
+    public void storeSink(McastRoute route, ConnectPoint sink, Type operation) {
+        MulticastData data = mcastRoutes.compute(route, (k, v) -> {
+            switch (operation) {
+                case ADD:
+                    if (v == null) {
+                        v = MulticastData.empty();
+                    }
+                    v.appendSink(sink);
+                    break;
+                case REMOVE:
+                    if (v != null) {
+                        v.removeSink(sink);
+                    }
+                    break;
+                default:
+                    log.warn("Unknown mcast operation type: {}", operation);
+            }
+            return v;
+        });
+
+
+        if (data != null) {
+            switch (operation) {
+                case ADD:
+                    notifyDelegate(new McastEvent(McastEvent.Type.SINK_ADDED,
+                                                  mcastRouteInfo(route, sink,
+                                                                 data.source())));
+                    break;
+                case REMOVE:
+                    if (data != null) {
+                        notifyDelegate(new McastEvent(McastEvent.Type.SINK_REMOVED,
+                                                      mcastRouteInfo(route,
+                                                                     sink,
+                                                                     data.source())));
+                    }
+                    break;
+                default:
+                    log.warn("Unknown mcast operation type: {}", operation);
+            }
+        }
+
+    }
+
+    @Override
+    public ConnectPoint sourceFor(McastRoute route) {
+        return mcastRoutes.getOrDefault(route, MulticastData.empty()).source();
+    }
+
+    @Override
+    public Set<ConnectPoint> sinksFor(McastRoute route) {
+        return mcastRoutes.getOrDefault(route, MulticastData.empty()).sinks();
+    }
+
+    @Override
+    public Set<McastRoute> getRoutes() {
+        return mcastRoutes.keySet();
+    }
+
+}