[ONOS-4164] PceManager device and link event handling

Change-Id: I55d8f60e0fcc0e23f4c14045a8e20bd89f635913
(cherry picked from commit 1d17cadb)

+/*
+ * Copyright 2016-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.pce.util;
+
+import java.util.Set;
+
+import org.onosproject.net.ConnectPoint;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.Link;
+import org.onosproject.net.link.LinkListener;
+import org.onosproject.net.link.LinkService;
+import org.onosproject.net.Link.State;
+
+import com.google.common.collect.FluentIterable;
+
+/**
+ * Test adapter for link service.
+ */
+public class LinkServiceAdapter implements LinkService {
+    @Override
+    public int getLinkCount() {
+        return 0;
+    }
+
+    @Override
+    public Iterable<Link> getLinks() {
+        return null;
+    }
+
+    @Override
+    public Iterable<Link> getActiveLinks() {
+        return FluentIterable.from(getLinks())
+                .filter(input -> input.state() == State.ACTIVE);
+    }
+
+    @Override
+    public Set<Link> getDeviceLinks(DeviceId deviceId) {
+        return null;
+    }
+
+    @Override
+    public Set<Link> getDeviceEgressLinks(DeviceId deviceId) {
+        return null;
+    }
+
+    @Override
+    public Set<Link> getDeviceIngressLinks(DeviceId deviceId) {
+        return null;
+    }
+
+    @Override
+    public Set<Link> getLinks(ConnectPoint connectPoint) {
+        return null;
+    }
+
+    @Override
+    public Set<Link> getEgressLinks(ConnectPoint connectPoint) {
+        return null;
+    }
+
+    @Override
+    public Set<Link> getIngressLinks(ConnectPoint connectPoint) {
+        return null;
+    }
+
+    @Override
+    public Link getLink(ConnectPoint src, ConnectPoint dst) {
+        return null;
+    }
+
+    @Override
+    public void addListener(LinkListener listener) {
+    }
+
+    @Override
+    public void removeListener(LinkListener listener) {
+    }
+}

+/*
+ * Copyright 2016-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.pce.util;
+
+import java.util.LinkedList;
+import java.util.List;
+
+import org.onosproject.net.device.DeviceListener;
+import org.onosproject.net.device.DeviceServiceAdapter;
+import org.onosproject.net.Device;
+import org.onosproject.net.DeviceId;
+
+/**
+ * Test fixture for the device service.
+ */
+public class MockDeviceService extends DeviceServiceAdapter {
+    private List<Device> devices = new LinkedList<>();
+    private DeviceListener listener;
+
+    public void addDevice(Device dev) {
+        devices.add(dev);
+    }
+
+    public void removeDevice(Device dev) {
+        devices.remove(dev);
+    }
+
+    @Override
+    public Device getDevice(DeviceId deviceId) {
+        for (Device dev : devices) {
+            if (dev.id().equals(deviceId)) {
+                return dev;
+            }
+        }
+        return null;
+    }
+
+    @Override
+    public Iterable<Device> getAvailableDevices() {
+        return devices;
+    }
+
+    @Override
+    public void addListener(DeviceListener listener) {
+        this.listener = listener;
+    }
+
+    /**
+     * Get the listener.
+     */
+    public DeviceListener getListener() {
+        return listener;
+    }
+}

+/*
+ * Copyright 2016-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.pce.util;
+
+import org.onosproject.net.Link;
+import org.onosproject.net.link.LinkServiceAdapter;
+import org.onosproject.net.link.LinkListener;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Test fixture for the link service.
+ */
+public class MockLinkService extends LinkServiceAdapter {
+    List<Link> links = new ArrayList<>();
+    LinkListener listener;
+
+    @Override
+    public int getLinkCount() {
+        return links.size();
+    }
+
+    @Override
+    public Iterable<Link> getLinks() {
+        return links;
+    }
+
+    @Override
+    public void addListener(LinkListener listener) {
+        this.listener = listener;
+    }
+
+    /**
+     * Get listener.
+     */
+    public LinkListener getListener() {
+        return listener;
+    }
+
+    /**
+     * Add link.
+     *
+     * @param link needs to be added to list
+     */
+    public void addLink(Link link) {
+        links.add(link);
+    }
+
+    /**
+     * Delete link.
+     *
+     * @param link needs to be deleted from list
+     */
+    public void removeLink(Link link) {
+        links.remove(link);
+    }
+}