very simple null host provider
Change-Id: I020ccd525e3e96a933ea9f69865d8e03af151500
diff --git a/providers/null/host/src/main/java/org/onosproject/provider/nil/host/impl/NullHostProvider.java b/providers/null/host/src/main/java/org/onosproject/provider/nil/host/impl/NullHostProvider.java
new file mode 100644
index 0000000..d3ece62
--- /dev/null
+++ b/providers/null/host/src/main/java/org/onosproject/provider/nil/host/impl/NullHostProvider.java
@@ -0,0 +1,159 @@
+/*
+ * 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.provider.nil.host.impl;
+
+import org.apache.felix.scr.annotations.Activate;
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Deactivate;
+import org.apache.felix.scr.annotations.Reference;
+import org.apache.felix.scr.annotations.ReferenceCardinality;
+import org.onlab.packet.MacAddress;
+import org.onlab.packet.VlanId;
+import org.onosproject.net.Device;
+import org.onosproject.net.Host;
+import org.onosproject.net.HostId;
+import org.onosproject.net.HostLocation;
+import org.onosproject.net.PortNumber;
+import org.onosproject.net.device.DeviceEvent;
+import org.onosproject.net.device.DeviceListener;
+import org.onosproject.net.device.DeviceService;
+import org.onosproject.net.host.DefaultHostDescription;
+import org.onosproject.net.host.HostDescription;
+import org.onosproject.net.host.HostProvider;
+import org.onosproject.net.host.HostProviderRegistry;
+import org.onosproject.net.host.HostProviderService;
+import org.onosproject.net.provider.AbstractProvider;
+import org.onosproject.net.provider.ProviderId;
+import org.slf4j.Logger;
+
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * Null provider to advertise fake hosts.
+ */
+@Component(immediate = true)
+public class NullHostProvider extends AbstractProvider implements HostProvider {
+
+ private final Logger log = getLogger(getClass());
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+ protected DeviceService deviceService;
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+ protected HostProviderRegistry providerRegistry;
+
+ private HostProviderService providerService;
+
+ //make sure the device has enough ports to accomodate all of them.
+ private static final int HOSTSPERDEVICE = 5;
+
+ private final InternalHostProvider hostProvider = new InternalHostProvider();
+
+ /**
+ * Creates an OpenFlow host provider.
+ */
+ public NullHostProvider() {
+ super(new ProviderId("null", "org.onosproject.provider.nil"));
+ }
+
+ /**
+ * Creates a provider with the supplier identifier.
+ *
+ * @param id provider id
+ */
+ protected NullHostProvider(ProviderId id) {
+ super(id);
+ }
+
+ @Activate
+ public void activate() {
+ providerService = providerRegistry.register(this);
+ for (Device dev : deviceService.getDevices()) {
+ addHosts(dev);
+ }
+ deviceService.addListener(hostProvider);
+
+ log.info("Started");
+ }
+
+
+
+ @Deactivate
+ public void deactivate() {
+ providerRegistry.unregister(this);
+ deviceService.removeListener(hostProvider);
+ providerService = null;
+ log.info("Stopped");
+ }
+
+ @Override
+ public void triggerProbe(Host host) {}
+
+ private void addHosts(Device device) {
+ for (int i = 0; i < HOSTSPERDEVICE; i++) {
+ providerService.hostDetected(
+ HostId.hostId(MacAddress.valueOf(i + device.hashCode()),
+ VlanId.vlanId((short) -1)),
+ buildHostDescription(device, i));
+ }
+ }
+
+ private void removeHosts(Device device) {
+ for (int i = 0; i < HOSTSPERDEVICE; i++) {
+ providerService.hostVanished(
+ HostId.hostId(MacAddress.valueOf(i + device.hashCode()),
+ VlanId.vlanId((short) -1)));
+ }
+ }
+
+ private HostDescription buildHostDescription(Device device, int port) {
+ MacAddress mac = MacAddress.valueOf(device.hashCode() + port);
+ HostLocation location = new HostLocation(device.id(),
+ PortNumber.portNumber(port), 0L);
+ return new DefaultHostDescription(mac, VlanId.vlanId((short) -1), location);
+ }
+
+ private class InternalHostProvider implements DeviceListener {
+ @Override
+ public void event(DeviceEvent event) {
+ switch (event.type()) {
+
+ case DEVICE_ADDED:
+ addHosts(event.subject());
+ break;
+ case DEVICE_UPDATED:
+ break;
+ case DEVICE_REMOVED:
+ removeHosts(event.subject());
+ break;
+ case DEVICE_SUSPENDED:
+ break;
+ case DEVICE_AVAILABILITY_CHANGED:
+ break;
+ case PORT_ADDED:
+ break;
+ case PORT_UPDATED:
+ break;
+ case PORT_REMOVED:
+ break;
+ default:
+ break;
+ }
+ }
+
+
+ }
+}