Allow adding/removing static routes through network config service

Change-Id: I800730d12af737ccecdb76f2000bca0984507dce
diff --git a/incubator/api/src/main/java/org/onosproject/incubator/net/routing/RouteConfig.java b/incubator/api/src/main/java/org/onosproject/incubator/net/routing/RouteConfig.java
new file mode 100644
index 0000000..99dbc57
--- /dev/null
+++ b/incubator/api/src/main/java/org/onosproject/incubator/net/routing/RouteConfig.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2016-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.incubator.net.routing;
+
+import com.google.common.collect.ImmutableSet;
+import org.onlab.packet.IpAddress;
+import org.onlab.packet.IpPrefix;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.net.config.Config;
+
+import java.util.Set;
+
+/**
+ * Route configuration object for Route Service.
+ */
+public class RouteConfig extends Config<ApplicationId> {
+    private static final String ROUTES = "routes";
+    private static final String PREFIX = "prefix";
+    private static final String NEXTHOP = "nextHop";
+
+    /**
+     * Returns all routes in this configuration.
+     *
+     * @return A set of route.
+     */
+    public Set<Route> getRoutes() {
+        ImmutableSet.Builder<Route> routes = ImmutableSet.builder();
+        array.forEach(route -> {
+            try {
+                IpPrefix prefix = IpPrefix.valueOf(route.path(PREFIX).asText());
+                IpAddress nextHop = IpAddress.valueOf(route.path(NEXTHOP).asText());
+                routes.add(new Route(Route.Source.STATIC, prefix, nextHop));
+            } catch (IllegalArgumentException e) {
+                // Ignores routes that cannot be parsed correctly
+            }
+        });
+        return routes.build();
+    }
+}
diff --git a/incubator/api/src/test/java/org/onosproject/incubator/net/routing/RouteConfigTest.java b/incubator/api/src/test/java/org/onosproject/incubator/net/routing/RouteConfigTest.java
new file mode 100644
index 0000000..b72f75c
--- /dev/null
+++ b/incubator/api/src/test/java/org/onosproject/incubator/net/routing/RouteConfigTest.java
@@ -0,0 +1,81 @@
+/*
+ * Copyright 2016-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.incubator.net.routing;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.common.collect.ImmutableSet;
+import org.junit.Before;
+import org.junit.Test;
+import org.onlab.packet.IpAddress;
+import org.onlab.packet.IpPrefix;
+import org.onosproject.TestApplicationId;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.net.config.Config;
+import org.onosproject.net.config.ConfigApplyDelegate;
+
+import java.io.InputStream;
+import java.util.Set;
+
+import static org.hamcrest.Matchers.is;
+import static org.hamcrest.Matchers.not;
+import static org.junit.Assert.*;
+
+/**
+ * Tests for class {@link RouteConfigTest}.
+ */
+public class RouteConfigTest {
+    private static final String KEY = "org.onosproject.routing";
+
+    private static final IpPrefix PREFIX1 = IpPrefix.valueOf("10.0.0.1/24");
+    private static final IpPrefix PREFIX2 = IpPrefix.valueOf("20.0.0.1/24");
+    private static final IpPrefix PREFIX3 = IpPrefix.valueOf("30.0.0.1/24");
+    private static final IpAddress NEXTHOP1 = IpAddress.valueOf("192.168.1.1");
+    private static final IpAddress NEXTHOP2 = IpAddress.valueOf("192.168.2.1");
+    private static final Route ROUTE1 = new Route(Route.Source.STATIC, PREFIX1, NEXTHOP1);
+    private static final Route ROUTE2 = new Route(Route.Source.STATIC, PREFIX2, NEXTHOP1);
+    private static final Route ROUTE3 = new Route(Route.Source.STATIC, PREFIX3, NEXTHOP2);
+    private static final Set<Route> EXPECTED_ROUTES = ImmutableSet.of(ROUTE1, ROUTE2, ROUTE3);
+    private static final Set<Route> UNEXPECTED_ROUTES = ImmutableSet.of(ROUTE1, ROUTE2);
+
+    private RouteConfig config;
+
+    @Before
+    public void setUp() throws Exception {
+        InputStream jsonStream = RouteConfigTest.class
+                .getResourceAsStream("/route-config.json");
+        ApplicationId subject = new TestApplicationId(KEY);
+        ObjectMapper mapper = new ObjectMapper();
+        JsonNode jsonNode = mapper.readTree(jsonStream);
+        ConfigApplyDelegate delegate = new MockDelegate();
+
+        config = new RouteConfig();
+        config.init(subject, KEY, jsonNode, mapper, delegate);
+    }
+
+    @Test
+    public void getRoutes() throws Exception {
+        assertThat(config.getRoutes(), is(EXPECTED_ROUTES));
+        assertThat(config.getRoutes(), not(UNEXPECTED_ROUTES));
+    }
+
+    private class MockDelegate implements ConfigApplyDelegate {
+        @Override
+        public void onApply(Config config) {
+        }
+    }
+}
\ No newline at end of file
diff --git a/incubator/api/src/test/resources/route-config.json b/incubator/api/src/test/resources/route-config.json
new file mode 100644
index 0000000..9675f12
--- /dev/null
+++ b/incubator/api/src/test/resources/route-config.json
@@ -0,0 +1,14 @@
+[
+  {
+    "prefix": "10.0.0.1/24",
+    "nextHop": "192.168.1.1"
+  },
+  {
+    "prefix": "20.0.0.1/24",
+    "nextHop": "192.168.1.1"
+  },
+  {
+    "prefix": "30.0.0.1/24",
+    "nextHop": "192.168.2.1"
+  }
+]
\ No newline at end of file
diff --git a/incubator/net/src/main/java/org/onosproject/incubator/net/routing/impl/RouteManager.java b/incubator/net/src/main/java/org/onosproject/incubator/net/routing/impl/RouteManager.java
index c266de0..7902473 100644
--- a/incubator/net/src/main/java/org/onosproject/incubator/net/routing/impl/RouteManager.java
+++ b/incubator/net/src/main/java/org/onosproject/incubator/net/routing/impl/RouteManager.java
@@ -23,12 +23,14 @@
 import org.apache.felix.scr.annotations.ReferenceCardinality;
 import org.apache.felix.scr.annotations.Service;
 import org.onlab.packet.IpAddress;
+import org.onosproject.core.ApplicationId;
 import org.onosproject.event.ListenerService;
 import org.onosproject.incubator.net.routing.NextHopData;
 import org.onosproject.incubator.net.routing.NextHop;
 import org.onosproject.incubator.net.routing.ResolvedRoute;
 import org.onosproject.incubator.net.routing.Route;
 import org.onosproject.incubator.net.routing.RouteAdminService;
+import org.onosproject.incubator.net.routing.RouteConfig;
 import org.onosproject.incubator.net.routing.RouteEvent;
 import org.onosproject.incubator.net.routing.RouteListener;
 import org.onosproject.incubator.net.routing.RouteService;
@@ -36,6 +38,11 @@
 import org.onosproject.incubator.net.routing.RouteStoreDelegate;
 import org.onosproject.incubator.net.routing.RouteTableId;
 import org.onosproject.net.Host;
+import org.onosproject.net.config.ConfigFactory;
+import org.onosproject.net.config.NetworkConfigEvent;
+import org.onosproject.net.config.NetworkConfigListener;
+import org.onosproject.net.config.NetworkConfigRegistry;
+import org.onosproject.net.config.basics.SubjectFactories;
 import org.onosproject.net.host.HostEvent;
 import org.onosproject.net.host.HostListener;
 import org.onosproject.net.host.HostService;
@@ -78,18 +85,34 @@
     @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
     protected HostService hostService;
 
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected NetworkConfigRegistry netcfgRegistry;
+
     @GuardedBy(value = "this")
     private Map<RouteListener, ListenerQueue> listeners = new HashMap<>();
 
     private ThreadFactory threadFactory;
 
+    private final ConfigFactory<ApplicationId, RouteConfig> routeConfigFactory =
+            new ConfigFactory<ApplicationId, RouteConfig>(
+                    SubjectFactories.APP_SUBJECT_FACTORY,
+                    RouteConfig.class, "routes", true) {
+                @Override
+                public RouteConfig createConfig() {
+                    return new RouteConfig();
+                }
+            };
+    private final InternalNetworkConfigListener netcfgListener =
+            new InternalNetworkConfigListener();
+
     @Activate
     protected void activate() {
         threadFactory = groupedThreads("onos/route", "listener-%d", log);
 
         routeStore.setDelegate(delegate);
         hostService.addListener(hostListener);
-
+        netcfgRegistry.addListener(netcfgListener);
+        netcfgRegistry.registerConfigFactory(routeConfigFactory);
     }
 
     @Deactivate
@@ -98,6 +121,8 @@
 
         routeStore.unsetDelegate(delegate);
         hostService.removeListener(hostListener);
+        netcfgRegistry.removeListener(netcfgListener);
+        netcfgRegistry.unregisterConfigFactory(routeConfigFactory);
     }
 
     /**
@@ -328,4 +353,50 @@
         }
     }
 
+    private class InternalNetworkConfigListener implements NetworkConfigListener {
+        @Override
+        public void event(NetworkConfigEvent event) {
+            if (event.configClass().equals(RouteConfig.class)) {
+                switch (event.type()) {
+                    case CONFIG_ADDED:
+                        processRouteConfigAdded(event);
+                        break;
+                    case CONFIG_UPDATED:
+                        processRouteConfigUpdated(event);
+                        break;
+                    case CONFIG_REMOVED:
+                        processRouteConfigRemoved(event);
+                        break;
+                    default:
+                        break;
+                }
+            }
+        }
+
+        private void processRouteConfigAdded(NetworkConfigEvent event) {
+            log.info("processRouteConfigAdded {}", event);
+            Set<Route> routes = ((RouteConfig) event.config().get()).getRoutes();
+            update(routes);
+        }
+
+        private void processRouteConfigUpdated(NetworkConfigEvent event) {
+            log.info("processRouteConfigUpdated {}", event);
+            Set<Route> routes = ((RouteConfig) event.config().get()).getRoutes();
+            Set<Route> prevRoutes = ((RouteConfig) event.prevConfig().get()).getRoutes();
+            Set<Route> pendingRemove = prevRoutes.stream()
+                    .filter(prevRoute -> routes.stream()
+                            .noneMatch(route -> route.prefix().equals(prevRoute.prefix())))
+                    .collect(Collectors.toSet());
+            Set<Route> pendingUpdate = routes.stream()
+                    .filter(route -> !pendingRemove.contains(route)).collect(Collectors.toSet());
+            update(pendingUpdate);
+            withdraw(pendingRemove);
+        }
+
+        private void processRouteConfigRemoved(NetworkConfigEvent event) {
+            log.info("processRouteConfigRemoved {}", event);
+            Set<Route> prevRoutes = ((RouteConfig) event.prevConfig().get()).getRoutes();
+            withdraw(prevRoutes);
+        }
+    }
 }
diff --git a/incubator/net/src/test/java/org/onosproject/incubator/net/routing/impl/RouteManagerTest.java b/incubator/net/src/test/java/org/onosproject/incubator/net/routing/impl/RouteManagerTest.java
index ba73cde..e740f3f 100644
--- a/incubator/net/src/test/java/org/onosproject/incubator/net/routing/impl/RouteManagerTest.java
+++ b/incubator/net/src/test/java/org/onosproject/incubator/net/routing/impl/RouteManagerTest.java
@@ -39,6 +39,7 @@
 import org.onosproject.net.HostId;
 import org.onosproject.net.HostLocation;
 import org.onosproject.net.PortNumber;
+import org.onosproject.net.config.NetworkConfigRegistry;
 import org.onosproject.net.host.HostEvent;
 import org.onosproject.net.host.HostListener;
 import org.onosproject.net.host.HostService;
@@ -93,6 +94,7 @@
 
         routeManager = new TestRouteManager();
         routeManager.hostService = hostService;
+        routeManager.netcfgRegistry = createMock(NetworkConfigRegistry.class);
 
         LocalRouteStore routeStore = new LocalRouteStore();
         routeStore.activate();