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/*
* 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.net.newresource.impl;
import com.google.common.collect.Lists;
import org.onlab.packet.MplsLabel;
import org.onlab.packet.VlanId;
import org.onlab.util.ItemNotFoundException;
import org.onosproject.net.Device;
import org.onosproject.net.DeviceId;
import org.onosproject.net.Port;
import org.onosproject.net.OchPort;
import org.onosproject.net.OchSignal;
import org.onosproject.net.PortNumber;
import org.onosproject.net.TributarySlot;
import org.onosproject.net.OduSignalType;
import org.onosproject.net.behaviour.LambdaQuery;
import org.onosproject.net.behaviour.MplsQuery;
import org.onosproject.net.behaviour.VlanQuery;
import org.onosproject.net.device.DeviceEvent;
import org.onosproject.net.device.DeviceListener;
import org.onosproject.net.driver.DriverHandler;
import org.onosproject.net.driver.DriverService;
import org.onosproject.net.newresource.ResourceAdminService;
import org.onosproject.net.newresource.ResourcePath;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Collections;
import java.util.List;
import java.util.SortedSet;
import java.util.concurrent.ExecutorService;
import java.util.stream.Collectors;
import java.util.stream.IntStream;
import static com.google.common.base.Preconditions.checkNotNull;
/**
* An implementation of DeviceListener registering devices as resources.
*/
final class ResourceDeviceListener implements DeviceListener {
private static final Logger log = LoggerFactory.getLogger(ResourceDeviceListener.class);
private static final int MAX_VLAN_ID = VlanId.MAX_VLAN;
private static final List<VlanId> ENTIRE_VLAN_IDS = getEntireVlans();
private static final int MAX_MPLS_LABEL = 1048576;
private static final List<MplsLabel> ENTIRE_MPLS_LABELS = getEntireMplsLabels();
private static final int TOTAL_ODU2_TRIBUTARY_SLOTS = 8;
private static final int TOTAL_ODU4_TRIBUTARY_SLOTS = 80;
private static final List<TributarySlot> ENTIRE_ODU2_TRIBUTARY_SLOTS = getEntireOdu2TributarySlots();
private static final List<TributarySlot> ENTIRE_ODU4_TRIBUTARY_SLOTS = getEntireOdu4TributarySlots();
private final ResourceAdminService adminService;
private final DriverService driverService;
private final ExecutorService executor;
/**
* Creates an instance with the specified ResourceAdminService and ExecutorService.
*
* @param adminService instance invoked to register resources
* @param executor executor used for processing resource registration
*/
ResourceDeviceListener(ResourceAdminService adminService, DriverService driverService,
ExecutorService executor) {
this.adminService = checkNotNull(adminService);
this.driverService = checkNotNull(driverService);
this.executor = checkNotNull(executor);
}
@Override
public void event(DeviceEvent event) {
Device device = event.subject();
switch (event.type()) {
case DEVICE_ADDED:
registerDeviceResource(device);
break;
case DEVICE_REMOVED:
unregisterDeviceResource(device);
break;
case PORT_ADDED:
registerPortResource(device, event.port());
break;
case PORT_REMOVED:
unregisterPortResource(device, event.port());
break;
default:
break;
}
}
private void registerDeviceResource(Device device) {
executor.submit(() -> adminService.registerResources(ResourcePath.discrete(device.id())));
}
private void unregisterDeviceResource(Device device) {
executor.submit(() -> adminService.unregisterResources(ResourcePath.discrete(device.id())));
}
private void registerPortResource(Device device, Port port) {
ResourcePath portPath = ResourcePath.discrete(device.id(), port.number());
executor.submit(() -> {
adminService.registerResources(portPath);
// for VLAN IDs
if (isVlanEnabled(device.id(), port.number())) {
adminService.registerResources(Lists.transform(ENTIRE_VLAN_IDS, portPath::child));
}
// for MPLS labels
if (isMplsEnabled(device.id(), port.number())) {
adminService.registerResources(Lists.transform(ENTIRE_MPLS_LABELS, portPath::child));
}
// for Lambdas
SortedSet<OchSignal> lambdas = queryLambdas(device.id(), port.number());
if (!lambdas.isEmpty()) {
adminService.registerResources(lambdas.stream()
.map(portPath::child)
.collect(Collectors.toList()));
}
// for Tributary slots
// TODO: need to define Behaviour to make a query about OCh port
switch (port.type()) {
case OCH:
// register ODU TributarySlots against the OCH port
registerTributarySlotsResources(((OchPort) port).signalType(), portPath);
break;
default:
break;
}
});
}
private void registerTributarySlotsResources(OduSignalType oduSignalType, ResourcePath portPath) {
switch (oduSignalType) {
case ODU2:
adminService.registerResources(Lists.transform(ENTIRE_ODU2_TRIBUTARY_SLOTS, portPath::child));
break;
case ODU4:
adminService.registerResources(Lists.transform(ENTIRE_ODU4_TRIBUTARY_SLOTS, portPath::child));
break;
default:
break;
}
}
private void unregisterPortResource(Device device, Port port) {
ResourcePath resource = ResourcePath.discrete(device.id(), port.number());
executor.submit(() -> adminService.unregisterResources(resource));
}
private SortedSet<OchSignal> queryLambdas(DeviceId did, PortNumber port) {
try {
DriverHandler handler = driverService.createHandler(did);
if (handler == null) {
return Collections.emptySortedSet();
}
LambdaQuery query = handler.behaviour(LambdaQuery.class);
return query.queryLambdas(port);
} catch (ItemNotFoundException e) {
return Collections.emptySortedSet();
}
}
private boolean isVlanEnabled(DeviceId device, PortNumber port) {
try {
DriverHandler handler = driverService.createHandler(device);
if (handler == null) {
return false;
}
VlanQuery query = handler.behaviour(VlanQuery.class);
return query != null && query.isEnabled(port);
} catch (ItemNotFoundException e) {
return false;
}
}
private boolean isMplsEnabled(DeviceId device, PortNumber port) {
try {
DriverHandler handler = driverService.createHandler(device);
if (handler == null) {
return false;
}
MplsQuery query = handler.behaviour(MplsQuery.class);
return query != null && query.isEnabled(port);
} catch (ItemNotFoundException e) {
return false;
}
}
private static List<VlanId> getEntireVlans() {
return IntStream.range(0, MAX_VLAN_ID)
.mapToObj(x -> VlanId.vlanId((short) x))
.collect(Collectors.toList());
}
private static List<MplsLabel> getEntireMplsLabels() {
// potentially many objects are created
return IntStream.range(0, MAX_MPLS_LABEL)
.mapToObj(MplsLabel::mplsLabel)
.collect(Collectors.toList());
}
private static List<TributarySlot> getEntireOdu2TributarySlots() {
return IntStream.rangeClosed(1, TOTAL_ODU2_TRIBUTARY_SLOTS)
.mapToObj(TributarySlot::of)
.collect(Collectors.toList());
}
private static List<TributarySlot> getEntireOdu4TributarySlots() {
return IntStream.rangeClosed(1, TOTAL_ODU4_TRIBUTARY_SLOTS)
.mapToObj(TributarySlot::of)
.collect(Collectors.toList());
}
}
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