Add CLI commands to create/list/remove tunnels and policies

Change-Id: I8cffb0feceb07e7f090e6a51fa41dde680b4956a
diff --git a/src/main/java/org/onosproject/segmentrouting/cli/TunnelListCommand.java b/src/main/java/org/onosproject/segmentrouting/cli/TunnelListCommand.java
new file mode 100644
index 0000000..fe51078
--- /dev/null
+++ b/src/main/java/org/onosproject/segmentrouting/cli/TunnelListCommand.java
@@ -0,0 +1,45 @@
+/*
+ * 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.segmentrouting.cli;
+
+import org.apache.karaf.shell.commands.Command;
+import org.onosproject.cli.AbstractShellCommand;
+import org.onosproject.segmentrouting.SegmentRoutingService;
+import org.onosproject.segmentrouting.Tunnel;
+
+/**
+ * Command to show the list of tunnels.
+ */
+@Command(scope = "onos", name = "srtunnel-list",
+        description = "Lists all tunnels")
+public class TunnelListCommand extends AbstractShellCommand {
+
+    private static final String FORMAT_MAPPING =
+            "  id=%s, path=%s";
+
+    @Override
+    protected void execute() {
+
+        SegmentRoutingService srService =
+                AbstractShellCommand.get(SegmentRoutingService.class);
+
+        srService.getTunnels().forEach(tunnel -> printTunnel(tunnel));
+    }
+
+    private void printTunnel(Tunnel tunnel) {
+        print(FORMAT_MAPPING, tunnel.id(), tunnel.labelIds());
+    }
+}