Allow addition and removal of individual routes via REST.

ONOS-6919

Change-Id: I7c851c92d495b42a9e0948f739859f46eb2ded7a
diff --git a/apps/route-service/app/src/main/java/org/onosproject/routeservice/rest/RouteCodec.java b/apps/route-service/app/src/main/java/org/onosproject/routeservice/rest/RouteCodec.java
new file mode 100644
index 0000000..3ea9f07
--- /dev/null
+++ b/apps/route-service/app/src/main/java/org/onosproject/routeservice/rest/RouteCodec.java
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2017-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.routeservice.rest;
+
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import org.onlab.packet.IpAddress;
+import org.onlab.packet.IpPrefix;
+import org.onosproject.codec.CodecContext;
+import org.onosproject.codec.JsonCodec;
+import org.onosproject.routeservice.Route;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Codec to encode and decode a unicast route to and from JSON.
+ */
+public class RouteCodec extends JsonCodec<Route> {
+
+    private static final String SOURCE = "source";
+    private static final String PREFIX = "prefix";
+    private static final String NEXT_HOP = "nextHop";
+
+    @Override
+    public ObjectNode encode(Route route, CodecContext context) {
+        checkNotNull(route);
+        ObjectNode root = context.mapper().createObjectNode()
+                .put(SOURCE, route.source().toString())
+                .put(PREFIX, route.prefix().toString())
+                .put(NEXT_HOP, route.nextHop().toString());
+
+        return root;
+    }
+
+    @Override
+    public Route decode(ObjectNode json, CodecContext context) {
+        if (json == null || !json.isObject()) {
+            return null;
+        }
+
+        IpPrefix prefix = IpPrefix.valueOf(json.path(PREFIX).asText());
+        IpAddress nextHop = IpAddress.valueOf(json.path(NEXT_HOP).asText());
+
+        // Routes through the REST API are created as STATIC, so we ignore
+        // the source parameter if it is specified in the JSON.
+        Route route = new Route(Route.Source.STATIC, prefix, nextHop);
+
+        return route;
+    }
+}
diff --git a/apps/route-service/app/src/main/java/org/onosproject/routeservice/rest/RouteServiceCodecRegistrator.java b/apps/route-service/app/src/main/java/org/onosproject/routeservice/rest/RouteServiceCodecRegistrator.java
new file mode 100644
index 0000000..2868e5f
--- /dev/null
+++ b/apps/route-service/app/src/main/java/org/onosproject/routeservice/rest/RouteServiceCodecRegistrator.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2017-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.routeservice.rest;
+
+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.onosproject.codec.CodecService;
+import org.onosproject.routeservice.Route;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+
+/**
+ * Implementation of the JSON codec brokering service for route service app.
+ */
+@Component(immediate = true)
+public class RouteServiceCodecRegistrator {
+
+    private static Logger log = LoggerFactory.getLogger(RouteServiceCodecRegistrator.class);
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected CodecService codecService;
+
+    @Activate
+    public void activate() {
+        codecService.registerCodec(Route.class, new RouteCodec());
+        log.info("Started");
+    }
+
+    @Deactivate
+    public void deactivate() {
+        log.info("Stopped");
+    }
+}
diff --git a/apps/route-service/app/src/main/java/org/onosproject/routeservice/rest/RouteServiceWebApplication.java b/apps/route-service/app/src/main/java/org/onosproject/routeservice/rest/RouteServiceWebApplication.java
new file mode 100644
index 0000000..fe5f361
--- /dev/null
+++ b/apps/route-service/app/src/main/java/org/onosproject/routeservice/rest/RouteServiceWebApplication.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2017-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.routeservice.rest;
+
+import java.util.Set;
+
+import org.onlab.rest.AbstractWebApplication;
+
+/**
+ * Route Service Web application.
+ */
+public class RouteServiceWebApplication extends AbstractWebApplication {
+    @Override
+    public Set<Class<?>> getClasses() {
+        return getClasses(RouteServiceWebResource.class);
+    }
+}
diff --git a/apps/route-service/app/src/main/java/org/onosproject/routeservice/rest/RouteServiceWebResource.java b/apps/route-service/app/src/main/java/org/onosproject/routeservice/rest/RouteServiceWebResource.java
new file mode 100644
index 0000000..bc03799
--- /dev/null
+++ b/apps/route-service/app/src/main/java/org/onosproject/routeservice/rest/RouteServiceWebResource.java
@@ -0,0 +1,120 @@
+/*
+ * Copyright 2017-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.routeservice.rest;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Collections;
+import java.util.List;
+import java.util.stream.Collectors;
+
+import javax.ws.rs.Consumes;
+import javax.ws.rs.DELETE;
+import javax.ws.rs.GET;
+import javax.ws.rs.POST;
+import javax.ws.rs.Path;
+import javax.ws.rs.Produces;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
+
+import org.onosproject.rest.AbstractWebResource;
+import org.onosproject.routeservice.ResolvedRoute;
+import org.onosproject.routeservice.Route;
+import org.onosproject.routeservice.RouteAdminService;
+import org.onosproject.routeservice.RouteService;
+
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
+/**
+ * Manage the unicast routing information.
+ */
+@Path("routes")
+public class RouteServiceWebResource extends AbstractWebResource {
+
+    /**
+     * Get all unicast routes.
+     * Returns array of all known unicast routes.
+     *
+     * @return 200 OK with array of all known unicast routes
+     * @onos.rsModel RoutesGet
+     */
+    @GET
+    @Produces(MediaType.APPLICATION_JSON)
+    public Response getRoutes() {
+        RouteService service = get(RouteService.class);
+        ObjectNode root = mapper().createObjectNode();
+        service.getRouteTables().forEach(table -> {
+            List<Route> routes = service.getRoutes(table).stream()
+                    .flatMap(ri -> ri.allRoutes().stream())
+                    .map(ResolvedRoute::route)
+                    .collect(Collectors.toList());
+            root.put(table.name(), codec(Route.class).encode(routes, this));
+        });
+        return ok(root).build();
+    }
+
+    /**
+     * Create new unicast route.
+     * Creates a new route in the unicast RIB. Routes created through the REST
+     * API are always created as STATIC routes, so there is no need to specify
+     * the type.
+     *
+     * @onos.rsModel RoutePost
+     * @param route unicast route JSON
+     * @return status of the request - CREATED if the JSON is correct,
+     * BAD_REQUEST if the JSON is invalid, NO_CONTENT otherwise
+     */
+    @POST
+    @Consumes(MediaType.APPLICATION_JSON)
+    @Produces(MediaType.APPLICATION_JSON)
+    public Response createRoute(InputStream route) {
+        RouteAdminService service = get(RouteAdminService.class);
+        try {
+            ObjectNode jsonTree = (ObjectNode) mapper().readTree(route);
+            Route r = codec(Route.class).decode(jsonTree, this);
+            service.update(Collections.singletonList(r));
+        } catch (IOException ex) {
+            throw new IllegalArgumentException(ex);
+        }
+
+        return Response
+                .noContent()
+                .build();
+    }
+
+    /**
+     * Remove a unicast route.
+     * Removes a route from the unicast RIB.
+     *
+     * @param route unicast route JSON
+     * @return 204 NO CONTENT
+     * @onos.rsModel RoutePost
+     */
+    @DELETE
+    @Consumes(MediaType.APPLICATION_JSON)
+    public Response deleteRoute(InputStream route) {
+        RouteAdminService service = get(RouteAdminService.class);
+        try {
+            ObjectNode jsonTree = (ObjectNode) mapper().readTree(route);
+            Route r = codec(Route.class).decode(jsonTree, this);
+            service.withdraw(Collections.singletonList(r));
+        } catch (IOException ex) {
+            throw new IllegalArgumentException(ex);
+        }
+        return Response.noContent().build();
+    }
+}
diff --git a/apps/route-service/app/src/main/java/org/onosproject/routeservice/rest/package-info.java b/apps/route-service/app/src/main/java/org/onosproject/routeservice/rest/package-info.java
new file mode 100644
index 0000000..b3fa22b
--- /dev/null
+++ b/apps/route-service/app/src/main/java/org/onosproject/routeservice/rest/package-info.java
@@ -0,0 +1,20 @@
+/*
+ * Copyright 2017-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.
+ */
+
+/**
+ * REST APIs for sample application that assigns and manages DHCP leases.
+ */
+package org.onosproject.routeservice.rest;
diff --git a/apps/route-service/app/src/main/resources/definitions/RoutePost.json b/apps/route-service/app/src/main/resources/definitions/RoutePost.json
new file mode 100644
index 0000000..c55578a
--- /dev/null
+++ b/apps/route-service/app/src/main/resources/definitions/RoutePost.json
@@ -0,0 +1,20 @@
+{
+  "type": "object",
+  "title": "route",
+  "required": [
+    "prefix",
+    "nextHop"
+  ],
+  "properties": {
+    "prefix": {
+      "type": "string",
+      "example": "10.1.1.0/24",
+      "description": "Route prefix"
+    },
+    "nextHop": {
+      "type": "string",
+      "example": "1.1.1.1",
+      "description": "Next hop IP address"
+    }
+  }
+}
diff --git a/apps/route-service/app/src/main/resources/definitions/RoutesGet.json b/apps/route-service/app/src/main/resources/definitions/RoutesGet.json
new file mode 100644
index 0000000..0ddb67d
--- /dev/null
+++ b/apps/route-service/app/src/main/resources/definitions/RoutesGet.json
@@ -0,0 +1,76 @@
+{
+  "type": "object",
+  "title": "routes",
+  "required": [
+    "ipv4",
+    "ipv6"
+  ],
+  "properties": {
+    "ipv4": {
+      "type": "array",
+      "xml": {
+        "name": "ipv4",
+        "wrapped": true
+      },
+      "items": {
+        "type": "object",
+        "title": "route",
+        "required": [
+          "source",
+          "prefix",
+          "nextHop"
+        ],
+        "properties": {
+          "source": {
+            "type": "string",
+            "example": "STATIC",
+            "description": "Route source"
+          },
+          "prefix": {
+            "type": "string",
+            "example": "10.1.1.0/24",
+            "description": "Route prefix"
+          },
+          "nextHop": {
+            "type": "string",
+            "example": "1.1.1.1",
+            "description": "Next hop IP address"
+          }
+        }
+      }
+    },
+    "ipv6": {
+      "type": "array",
+      "xml": {
+        "name": "ipv6",
+        "wrapped": true
+      },
+      "items": {
+        "type": "object",
+        "title": "route",
+        "required": [
+          "source",
+          "prefix",
+          "nextHop"
+        ],
+        "properties": {
+          "source": {
+            "type": "string",
+            "example": "STATIC",
+            "description": "Route source"
+          },
+          "prefix": {
+            "type": "string",
+            "example": "1111::/64",
+            "description": "Route prefix"
+          },
+          "nextHop": {
+            "type": "string",
+            "example": "2222::1",
+            "description": "Next hop IP address"
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/apps/route-service/app/src/main/webapp/WEB-INF/web.xml b/apps/route-service/app/src/main/webapp/WEB-INF/web.xml
new file mode 100644
index 0000000..4ee6c96
--- /dev/null
+++ b/apps/route-service/app/src/main/webapp/WEB-INF/web.xml
@@ -0,0 +1,57 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Copyright 2017-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.
+  -->
+<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xmlns="http://java.sun.com/xml/ns/javaee"
+         xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
+         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
+         id="ONOS" version="2.5">
+    <display-name>DHCP Server REST API v1.0</display-name>
+
+    <security-constraint>
+        <web-resource-collection>
+            <web-resource-name>Secured</web-resource-name>
+            <url-pattern>/*</url-pattern>
+        </web-resource-collection>
+        <auth-constraint>
+            <role-name>admin</role-name>
+        </auth-constraint>
+    </security-constraint>
+
+    <security-role>
+        <role-name>admin</role-name>
+    </security-role>
+
+    <login-config>
+        <auth-method>BASIC</auth-method>
+        <realm-name>karaf</realm-name>
+    </login-config>
+
+    <servlet>
+        <servlet-name>JAX-RS Service</servlet-name>
+        <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
+        <init-param>
+            <param-name>javax.ws.rs.Application</param-name>
+            <param-value>org.onosproject.routeservice.rest.RouteServiceWebApplication</param-value>
+        </init-param>
+        <load-on-startup>1</load-on-startup>
+    </servlet>
+
+    <servlet-mapping>
+        <servlet-name>JAX-RS Service</servlet-name>
+        <url-pattern>/*</url-pattern>
+    </servlet-mapping>
+</web-app>