Make vRouter components into separate apps.

This allows us to leverage the ONOS app subsystem for selecting which
components to load.

CORD-710

Change-Id: Ibd7c4c1afd2caa137b44c085e7b6b5b4a1082521
diff --git a/apps/routing/common/src/main/java/org/onosproject/routing/cli/BgpNeighborsListCommand.java b/apps/routing/common/src/main/java/org/onosproject/routing/cli/BgpNeighborsListCommand.java
new file mode 100644
index 0000000..c7d6e1b
--- /dev/null
+++ b/apps/routing/common/src/main/java/org/onosproject/routing/cli/BgpNeighborsListCommand.java
@@ -0,0 +1,184 @@
+/*
+ * 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.routing.cli;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import org.apache.karaf.shell.commands.Command;
+import org.apache.karaf.shell.commands.Option;
+import org.onosproject.cli.AbstractShellCommand;
+import org.onosproject.routing.bgp.BgpInfoService;
+import org.onosproject.routing.bgp.BgpSession;
+
+import java.util.Collection;
+
+/**
+ * Command to show the BGP neighbors.
+ */
+@Command(scope = "onos", name = "bgp-neighbors",
+         description = "Lists the BGP neighbors")
+public class BgpNeighborsListCommand extends AbstractShellCommand {
+    @Option(name = "-n", aliases = "--neighbor",
+            description = "BGP neighbor to display information about",
+            required = false, multiValued = false)
+    private String bgpNeighbor;
+
+    private static final String FORMAT_NEIGHBOR_LINE1 =
+        "BGP neighbor is %s, remote AS %d, local AS %d";
+    private static final String FORMAT_NEIGHBOR_LINE2 =
+        "  Remote router ID %s, IP %s, BGP version %d, Hold time %d";
+    private static final String FORMAT_NEIGHBOR_LINE3 =
+        "  Remote AFI/SAFI IPv4 Unicast %s Multicast %s, IPv6 Unicast %s Multicast %s";
+    private static final String FORMAT_NEIGHBOR_LINE4 =
+        "  Local  router ID %s, IP %s, BGP version %d, Hold time %d";
+    private static final String FORMAT_NEIGHBOR_LINE5 =
+        "  Local  AFI/SAFI IPv4 Unicast %s Multicast %s, IPv6 Unicast %s Multicast %s";
+    private static final String FORMAT_NEIGHBOR_LINE6 =
+        "  4 Octet AS Capability: %s %s";
+
+    @Override
+    protected void execute() {
+        BgpInfoService service = AbstractShellCommand.get(BgpInfoService.class);
+        Collection<BgpSession> bgpSessions = service.getBgpSessions();
+
+        if (bgpNeighbor != null) {
+            // Print a single neighbor (if found)
+            BgpSession foundBgpSession = null;
+            for (BgpSession bgpSession : bgpSessions) {
+                if (bgpSession.remoteInfo().bgpId().toString().equals(bgpNeighbor)) {
+                    foundBgpSession = bgpSession;
+                    break;
+                }
+            }
+            if (foundBgpSession != null) {
+                printNeighbor(foundBgpSession);
+            } else {
+                print("BGP neighbor %s not found", bgpNeighbor);
+            }
+            return;
+        }
+
+        // Print all neighbors
+        printNeighbors(bgpSessions);
+    }
+
+    /**
+     * Prints all BGP neighbors.
+     *
+     * @param bgpSessions the BGP sessions for the neighbors to print
+     */
+    private void printNeighbors(Collection<BgpSession> bgpSessions) {
+        if (outputJson()) {
+            print("%s", json(bgpSessions));
+        } else {
+            for (BgpSession bgpSession : bgpSessions) {
+                printNeighbor(bgpSession);
+            }
+        }
+    }
+
+    /**
+     * Prints a BGP neighbor.
+     *
+     * @param bgpSession the BGP session for the neighbor to print
+     */
+    private void printNeighbor(BgpSession bgpSession) {
+        print(FORMAT_NEIGHBOR_LINE1,
+              bgpSession.remoteInfo().bgpId().toString(),
+              bgpSession.remoteInfo().asNumber(),
+              bgpSession.localInfo().asNumber());
+        print(FORMAT_NEIGHBOR_LINE2,
+              bgpSession.remoteInfo().bgpId().toString(),
+              bgpSession.remoteInfo().address().toString(),
+              bgpSession.remoteInfo().bgpVersion(),
+              bgpSession.remoteInfo().holdtime());
+        print(FORMAT_NEIGHBOR_LINE3,
+              bgpSession.remoteInfo().ipv4Unicast() ? "YES" : "NO",
+              bgpSession.remoteInfo().ipv4Multicast() ? "YES" : "NO",
+              bgpSession.remoteInfo().ipv6Unicast() ? "YES" : "NO",
+              bgpSession.remoteInfo().ipv6Multicast() ? "YES" : "NO");
+        print(FORMAT_NEIGHBOR_LINE4,
+              bgpSession.localInfo().bgpId().toString(),
+              bgpSession.localInfo().address().toString(),
+              bgpSession.localInfo().bgpVersion(),
+              bgpSession.localInfo().holdtime());
+        print(FORMAT_NEIGHBOR_LINE5,
+              bgpSession.localInfo().ipv4Unicast() ? "YES" : "NO",
+              bgpSession.localInfo().ipv4Multicast() ? "YES" : "NO",
+              bgpSession.localInfo().ipv6Unicast() ? "YES" : "NO",
+              bgpSession.localInfo().ipv6Multicast() ? "YES" : "NO");
+        if (bgpSession.localInfo().as4OctetCapability() ||
+            bgpSession.remoteInfo().as4OctetCapability()) {
+            print(FORMAT_NEIGHBOR_LINE6,
+                  bgpSession.localInfo().as4OctetCapability() ? "Advertised" : "",
+                  bgpSession.remoteInfo().as4OctetCapability() ? "Received" : "");
+        }
+    }
+
+    /**
+     * Produces a JSON array of BGP neighbors.
+     *
+     * @param bgpSessions the BGP sessions with the data
+     * @return JSON array with the neighbors
+     */
+    private JsonNode json(Collection<BgpSession> bgpSessions) {
+        ObjectMapper mapper = new ObjectMapper();
+        ArrayNode result = mapper.createArrayNode();
+
+        for (BgpSession bgpSession : bgpSessions) {
+            result.add(json(mapper, bgpSession));
+        }
+        return result;
+    }
+
+    /**
+     * Produces JSON object for a BGP neighbor.
+     *
+     * @param mapper the JSON object mapper to use
+     * @param bgpSession the BGP session with the data
+     * @return JSON object for the route
+     */
+    private ObjectNode json(ObjectMapper mapper, BgpSession bgpSession) {
+        ObjectNode result = mapper.createObjectNode();
+
+        result.put("remoteAddress", bgpSession.remoteInfo().address().toString());
+        result.put("remoteBgpVersion", bgpSession.remoteInfo().bgpVersion());
+        result.put("remoteAs", bgpSession.remoteInfo().asNumber());
+        result.put("remoteAs4", bgpSession.remoteInfo().as4Number());
+        result.put("remoteHoldtime", bgpSession.remoteInfo().holdtime());
+        result.put("remoteBgpId", bgpSession.remoteInfo().bgpId().toString());
+        result.put("remoteIpv4Unicast", bgpSession.remoteInfo().ipv4Unicast());
+        result.put("remoteIpv4Multicast", bgpSession.remoteInfo().ipv4Multicast());
+        result.put("remoteIpv6Unicast", bgpSession.remoteInfo().ipv6Unicast());
+        result.put("remoteIpv6Multicast", bgpSession.remoteInfo().ipv6Multicast());
+        //
+        result.put("localAddress", bgpSession.localInfo().address().toString());
+        result.put("localBgpVersion", bgpSession.localInfo().bgpVersion());
+        result.put("localAs", bgpSession.localInfo().asNumber());
+        result.put("localAs4", bgpSession.localInfo().as4Number());
+        result.put("localHoldtime", bgpSession.localInfo().holdtime());
+        result.put("localBgpId", bgpSession.localInfo().bgpId().toString());
+        result.put("localIpv4Unicast", bgpSession.localInfo().ipv4Unicast());
+        result.put("localIpv4Multicast", bgpSession.localInfo().ipv4Multicast());
+        result.put("localIpv6Unicast", bgpSession.localInfo().ipv6Unicast());
+        result.put("localIpv6Multicast", bgpSession.localInfo().ipv6Multicast());
+
+        return result;
+    }
+}