[ONOS-5833] (vCore) Refactor vnet services
to enable event delivery mechanism

Changes
1. Abstact Vnet Listener Manager is added
2. Refactor Vnet services to use it

Change-Id: I178342bfc882c0739f216960358a281903e1385a
diff --git a/incubator/api/src/test/java/org/onosproject/incubator/net/virtual/event/AbstractVirtualListenerManagerTest.java b/incubator/api/src/test/java/org/onosproject/incubator/net/virtual/event/AbstractVirtualListenerManagerTest.java
index 87b3fc0..33fce56 100644
--- a/incubator/api/src/test/java/org/onosproject/incubator/net/virtual/event/AbstractVirtualListenerManagerTest.java
+++ b/incubator/api/src/test/java/org/onosproject/incubator/net/virtual/event/AbstractVirtualListenerManagerTest.java
@@ -16,15 +16,26 @@
 
 package org.onosproject.incubator.net.virtual.event;
 
+import com.google.common.collect.ClassToInstanceMap;
+import com.google.common.collect.MutableClassToInstanceMap;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
+import org.onlab.osgi.ServiceDirectory;
 import org.onosproject.event.AbstractEvent;
 import org.onosproject.event.Event;
 import org.onosproject.event.EventDeliveryService;
 import org.onosproject.event.EventListener;
 import org.onosproject.event.EventSink;
 import org.onosproject.incubator.net.virtual.NetworkId;
+import org.onosproject.incubator.net.virtual.TenantId;
+import org.onosproject.incubator.net.virtual.VirtualDevice;
+import org.onosproject.incubator.net.virtual.VirtualHost;
+import org.onosproject.incubator.net.virtual.VirtualLink;
+import org.onosproject.incubator.net.virtual.VirtualNetwork;
+import org.onosproject.incubator.net.virtual.VirtualNetworkService;
+import org.onosproject.incubator.net.virtual.VirtualPort;
+import org.onosproject.net.DeviceId;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -39,6 +50,8 @@
  */
 public class AbstractVirtualListenerManagerTest {
 
+    private VirtualNetworkService manager;
+
     TestEventDispatcher dispatcher = new TestEventDispatcher();
     VirtualListenerRegistryManager listenerRegistryManager =
             VirtualListenerRegistryManager.getInstance();
@@ -54,21 +67,20 @@
 
     @Before
     public void setUp() {
+        manager = new TestVirtualNetworkManager();
+
         dispatcher.addSink(VirtualEvent.class, listenerRegistryManager);
 
         prickleListener = new PrickleListener();
-        prickleManager = new PrickleManager(NetworkId.networkId(1));
-        prickleManager.eventDispatcher = dispatcher;
+        prickleManager = new PrickleManager(manager, NetworkId.networkId(1));
         prickleManager.addListener(prickleListener);
 
         gooListener = new GooListener();
-        gooManager = new GooManager(NetworkId.networkId(1));
-        gooManager.eventDispatcher = dispatcher;
+        gooManager = new GooManager(manager, NetworkId.networkId(1));
         gooManager.addListener(gooListener);
 
         barListener = new BarListener();
-        barManager = new BarManager(NetworkId.networkId(2));
-        barManager.eventDispatcher = dispatcher;
+        barManager = new BarManager(manager, NetworkId.networkId(2));
         barManager.addListener(barListener);
     }
 
@@ -168,7 +180,6 @@
 
         @Override
         public void event(E event) {
-            System.out.println(this.getClass().toString());
             events.add(event);
             latch.countDown();
         }
@@ -184,20 +195,20 @@
     }
 
     private class PrickleManager extends AbstractVirtualListenerManager<Prickle, PrickleListener> {
-        public PrickleManager(NetworkId networkId) {
-            super(networkId);
+        public PrickleManager(VirtualNetworkService service, NetworkId networkId) {
+            super(service, networkId);
         }
     }
 
     private class GooManager extends AbstractVirtualListenerManager<Goo, GooListener> {
-        public GooManager(NetworkId networkId) {
-            super(networkId);
+        public GooManager(VirtualNetworkService service, NetworkId networkId) {
+            super(service, networkId);
         }
     }
 
     private class BarManager extends AbstractVirtualListenerManager<Bar, BarListener> {
-        public BarManager(NetworkId networkId) {
-            super(networkId);
+        public BarManager(VirtualNetworkService service, NetworkId networkId) {
+            super(service, networkId);
         }
     }
 
@@ -242,4 +253,70 @@
             }
         }
     }
+
+    private class TestVirtualNetworkManager implements VirtualNetworkService {
+        TestServiceDirectory serviceDirectory = new TestServiceDirectory();
+
+        public TestVirtualNetworkManager() {
+            serviceDirectory.add(EventDeliveryService.class, dispatcher);
+        }
+
+        @Override
+        public Set<VirtualNetwork> getVirtualNetworks(TenantId tenantId) {
+            return null;
+        }
+
+        @Override
+        public Set<VirtualDevice> getVirtualDevices(NetworkId networkId) {
+            return null;
+        }
+
+        @Override
+        public Set<VirtualHost> getVirtualHosts(NetworkId networkId) {
+            return null;
+        }
+
+        @Override
+        public Set<VirtualLink> getVirtualLinks(NetworkId networkId) {
+            return null;
+        }
+
+        @Override
+        public Set<VirtualPort> getVirtualPorts(NetworkId networkId, DeviceId deviceId) {
+            return null;
+        }
+
+        @Override
+        public <T> T get(NetworkId networkId, Class<T> serviceClass) {
+            return null;
+        }
+
+        @Override
+        public ServiceDirectory getServiceDirectory() {
+            return serviceDirectory;
+        }
+    }
+
+    private  class TestServiceDirectory implements ServiceDirectory {
+
+        private ClassToInstanceMap<Object> services = MutableClassToInstanceMap.create();
+
+        @Override
+        public <T> T get(Class<T> serviceClass) {
+            return services.getInstance(serviceClass);
+        }
+
+        /**
+         * Adds a new service to the directory.
+         *
+         * @param serviceClass service class
+         * @param service service instance
+         * @return self
+         */
+        public TestServiceDirectory add(Class serviceClass, Object service) {
+            services.putInstance(serviceClass, service);
+            return this;
+        }
+
+    }
 }
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