Added ability to remove host by CLI and by the provider on device/port down events.

Change-Id: I28de4b6b5bbfb5a00f35e1808bcd916369d7d1a4
diff --git a/providers/host/src/test/java/org/onlab/onos/provider/host/impl/HostLocationProviderTest.java b/providers/host/src/test/java/org/onlab/onos/provider/host/impl/HostLocationProviderTest.java
index e42d657..00c467a 100644
--- a/providers/host/src/test/java/org/onlab/onos/provider/host/impl/HostLocationProviderTest.java
+++ b/providers/host/src/test/java/org/onlab/onos/provider/host/impl/HostLocationProviderTest.java
@@ -15,25 +15,28 @@
  */
 package org.onlab.onos.provider.host.impl;
 
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.assertNull;
-
-import java.nio.ByteBuffer;
-import java.util.Set;
-
+import com.google.common.collect.ImmutableSet;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 import org.onlab.onos.net.ConnectPoint;
+import org.onlab.onos.net.DefaultDevice;
+import org.onlab.onos.net.DefaultHost;
+import org.onlab.onos.net.DefaultPort;
+import org.onlab.onos.net.Device;
 import org.onlab.onos.net.DeviceId;
+import org.onlab.onos.net.Host;
 import org.onlab.onos.net.HostId;
-import org.onlab.onos.net.PortNumber;
+import org.onlab.onos.net.HostLocation;
+import org.onlab.onos.net.device.DeviceEvent;
+import org.onlab.onos.net.device.DeviceListener;
+import org.onlab.onos.net.device.DeviceServiceAdapter;
 import org.onlab.onos.net.flow.TrafficTreatment;
 import org.onlab.onos.net.host.HostDescription;
 import org.onlab.onos.net.host.HostProvider;
 import org.onlab.onos.net.host.HostProviderRegistry;
 import org.onlab.onos.net.host.HostProviderService;
+import org.onlab.onos.net.host.HostServiceAdapter;
 import org.onlab.onos.net.packet.DefaultInboundPacket;
 import org.onlab.onos.net.packet.InboundPacket;
 import org.onlab.onos.net.packet.OutboundPacket;
@@ -43,13 +46,30 @@
 import org.onlab.onos.net.provider.AbstractProviderService;
 import org.onlab.onos.net.provider.ProviderId;
 import org.onlab.onos.net.topology.Topology;
-
 import org.onlab.onos.net.topology.TopologyServiceAdapter;
+import org.onlab.osgi.ComponentContextAdapter;
 import org.onlab.packet.ARP;
+import org.onlab.packet.ChassisId;
 import org.onlab.packet.Ethernet;
+import org.onlab.packet.IpAddress;
 import org.onlab.packet.MacAddress;
 import org.onlab.packet.VlanId;
 
+import java.nio.ByteBuffer;
+import java.util.Dictionary;
+import java.util.Hashtable;
+import java.util.Set;
+
+import static org.junit.Assert.*;
+import static org.onlab.onos.net.Device.Type.SWITCH;
+import static org.onlab.onos.net.DeviceId.deviceId;
+import static org.onlab.onos.net.HostId.hostId;
+import static org.onlab.onos.net.PortNumber.portNumber;
+import static org.onlab.onos.net.device.DeviceEvent.Type.DEVICE_AVAILABILITY_CHANGED;
+import static org.onlab.onos.net.device.DeviceEvent.Type.DEVICE_REMOVED;
+import static org.onlab.onos.net.device.DeviceEvent.Type.PORT_UPDATED;
+import static org.onlab.packet.VlanId.vlanId;
+
 public class HostLocationProviderTest {
 
     private static final Integer INPORT = 10;
@@ -57,14 +77,44 @@
     private static final String DEV2 = "of:2";
     private static final String DEV3 = "of:3";
 
-    private static final VlanId VLAN = VlanId.vlanId();
+    private static final VlanId VLAN = vlanId();
     private static final MacAddress MAC = MacAddress.valueOf("00:00:11:00:00:01");
     private static final MacAddress BCMAC = MacAddress.valueOf("ff:ff:ff:ff:ff:ff");
     private static final byte[] IP = new byte[]{10, 0, 0, 1};
 
+    private static final IpAddress IP_ADDRESS =
+            IpAddress.valueOf(IpAddress.Version.INET, IP);
+    private static final HostLocation LOCATION =
+            new HostLocation(deviceId(DEV1), portNumber(INPORT), 0L);
+
+    private static final DefaultHost HOST =
+            new DefaultHost(ProviderId.NONE, hostId(MAC), MAC,
+                            vlanId(VlanId.UNTAGGED), LOCATION,
+                            ImmutableSet.of(IP_ADDRESS));
+
+    private static final ComponentContextAdapter CTX_FOR_REMOVE =
+            new ComponentContextAdapter() {
+                @Override
+                public Dictionary getProperties() {
+                    Hashtable<String, String> props = new Hashtable<>();
+                    props.put("hostRemovalEnabled", "true");
+                    return props;
+                }
+            };
+
+    public static final ComponentContextAdapter CTX_FOR_NO_REMOVE =
+            new ComponentContextAdapter() {
+                @Override
+                public Dictionary getProperties() {
+                    return new Hashtable();
+                }
+            };
+
     private final HostLocationProvider provider = new HostLocationProvider();
-    private final TestHostRegistry hostService = new TestHostRegistry();
+    private final TestHostRegistry hostRegistry = new TestHostRegistry();
     private final TestTopologyService topoService = new TestTopologyService();
+    private final TestDeviceService deviceService = new TestDeviceService();
+    private final TestHostService hostService = new TestHostService();
     private final TestPacketService packetService = new TestPacketService();
 
     private PacketProcessor testProcessor;
@@ -72,12 +122,13 @@
 
     @Before
     public void setUp() {
-        provider.providerRegistry = hostService;
+        provider.providerRegistry = hostRegistry;
         provider.topologyService = topoService;
         provider.pktService = packetService;
+        provider.deviceService = deviceService;
+        provider.hostService = hostService;
 
-        provider.activate();
-
+        provider.activate(CTX_FOR_NO_REMOVE);
     }
 
     @Test
@@ -89,8 +140,6 @@
     @Test
     public void events() {
         // new host
-
-
         testProcessor.process(new TestPacketContext(DEV1));
         assertNotNull("new host expected", providerService.added);
         assertNull("host motion unexpected", providerService.moved);
@@ -104,6 +153,39 @@
         assertNull("host misheard on spine switch", providerService.spine);
     }
 
+    @Test
+    public void removeHostByDeviceRemove() {
+        provider.modified(CTX_FOR_REMOVE);
+        testProcessor.process(new TestPacketContext(DEV1));
+        Device device = new DefaultDevice(ProviderId.NONE, deviceId(DEV1), SWITCH,
+                                          "m", "h", "s", "n", new ChassisId(0L));
+        deviceService.listener.event(new DeviceEvent(DEVICE_REMOVED, device));
+        assertEquals("incorrect remove count", 1, providerService.removeCount);
+    }
+
+    @Test
+    public void removeHostByDeviceOffline() {
+        provider.modified(CTX_FOR_REMOVE);
+        testProcessor.process(new TestPacketContext(DEV1));
+        Device device = new DefaultDevice(ProviderId.NONE, deviceId(DEV1), SWITCH,
+                                          "m", "h", "s", "n", new ChassisId(0L));
+        deviceService.listener.event(new DeviceEvent(DEVICE_AVAILABILITY_CHANGED, device));
+        assertEquals("incorrect remove count", 1, providerService.removeCount);
+    }
+
+    @Test
+    public void removeHostByDevicePortDown() {
+        provider.modified(CTX_FOR_REMOVE);
+        testProcessor.process(new TestPacketContext(DEV1));
+        Device device = new DefaultDevice(ProviderId.NONE, deviceId(DEV1), SWITCH,
+                                          "m", "h", "s", "n", new ChassisId(0L));
+        deviceService.listener.event(new DeviceEvent(PORT_UPDATED, device,
+                                                     new DefaultPort(device, portNumber(INPORT),
+                                                                     false)));
+        assertEquals("incorrect remove count", 1, providerService.removeCount);
+    }
+
+
     @After
     public void tearDown() {
         provider.deactivate();
@@ -137,6 +219,7 @@
         DeviceId added = null;
         DeviceId moved = null;
         DeviceId spine = null;
+        public int removeCount;
 
         protected TestHostProviderService(HostProvider provider) {
             super(provider);
@@ -156,6 +239,7 @@
 
         @Override
         public void hostVanished(HostId hostId) {
+            removeCount++;
         }
 
     }
@@ -169,12 +253,10 @@
 
         @Override
         public void removeProcessor(PacketProcessor processor) {
-
         }
 
         @Override
         public void emit(OutboundPacket packet) {
-
         }
     }
 
@@ -184,7 +266,7 @@
         public boolean isInfrastructure(Topology topology,
                                         ConnectPoint connectPoint) {
             //simulate DPID3 as an infrastructure switch
-            if ((connectPoint.deviceId()).equals(DeviceId.deviceId(DEV3))) {
+            if ((connectPoint.deviceId()).equals(deviceId(DEV3))) {
                 return true;
             }
             return false;
@@ -218,8 +300,8 @@
                     .setSourceMACAddress(MAC.toBytes())
                     .setDestinationMACAddress(BCMAC)
                     .setPayload(arp);
-            ConnectPoint receivedFrom = new ConnectPoint(DeviceId.deviceId(deviceId),
-                                                         PortNumber.portNumber(INPORT));
+            ConnectPoint receivedFrom = new ConnectPoint(deviceId(deviceId),
+                                                         portNumber(INPORT));
             return new DefaultInboundPacket(receivedFrom, eth,
                                             ByteBuffer.wrap(eth.serialize()));
         }
@@ -249,4 +331,26 @@
             return false;
         }
     }
+
+    private class TestDeviceService extends DeviceServiceAdapter {
+        private DeviceListener listener;
+
+        @Override
+        public void addListener(DeviceListener listener) {
+            this.listener = listener;
+        }
+    }
+
+    private class TestHostService extends HostServiceAdapter {
+        @Override
+        public Set<Host> getConnectedHosts(ConnectPoint connectPoint) {
+            return ImmutableSet.of(HOST);
+        }
+
+        @Override
+        public Set<Host> getConnectedHosts(DeviceId deviceId) {
+            return ImmutableSet.of(HOST);
+        }
+
+    }
 }