| /* |
| * Copyright 2019-present Open Networking Foundation |
| * |
| * 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.pipelines.fabric.impl.behaviour.bng; |
| |
| import com.google.common.collect.Maps; |
| import org.onosproject.net.DeviceId; |
| import org.onosproject.net.device.DeviceEvent; |
| import org.onosproject.net.device.DeviceListener; |
| import org.onosproject.net.device.DeviceService; |
| import org.osgi.service.component.annotations.Activate; |
| import org.osgi.service.component.annotations.Component; |
| import org.osgi.service.component.annotations.Deactivate; |
| import org.osgi.service.component.annotations.Reference; |
| import org.osgi.service.component.annotations.ReferenceCardinality; |
| |
| import java.util.Map; |
| |
| import static java.lang.String.format; |
| |
| /** |
| * Service that handles state necessary for the operations of {@link |
| * FabricBngProgrammable}. |
| */ |
| @Component(immediate = true, service = FabricBngProgrammableService.class) |
| public final class FabricBngProgrammableService { |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected DeviceService deviceService; |
| |
| private final DeviceListener deviceListener = new InternalDeviceListener(); |
| private Map<DeviceId, SimpleBngLineIdAllocator> allocators; |
| |
| @Activate |
| public void activate() { |
| allocators = Maps.newHashMap(); |
| deviceService.addListener(deviceListener); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| deviceService.removeListener(deviceListener); |
| allocators.clear(); |
| allocators = null; |
| } |
| |
| /** |
| * Returns a {@link FabricBngLineIdAllocator} for the given device and |
| * size. |
| * |
| * @param deviceId device ID |
| * @param size size of the allocator |
| * @return allocator instance |
| * @throws IllegalArgumentException if an existing allocator is found for |
| * the given device ID but with different |
| * size. |
| */ |
| FabricBngLineIdAllocator getLineIdAllocator(DeviceId deviceId, long size) { |
| return allocators.compute(deviceId, (d, allocator) -> { |
| if (allocator != null) { |
| if (allocator.size() == size) { |
| return allocator; |
| } else { |
| throw new IllegalArgumentException(format( |
| "An allocator already exists for %s with size %d, " + |
| "but one was requested with different size (%d)", |
| deviceId, allocators.get(deviceId).size(), size)); |
| } |
| } |
| return new SimpleBngLineIdAllocator(size); |
| }); |
| } |
| |
| /** |
| * Internal device event listener. |
| */ |
| public class InternalDeviceListener implements DeviceListener { |
| @Override |
| public void event(DeviceEvent event) { |
| if (event.type() == DeviceEvent.Type.DEVICE_REMOVED) { |
| allocators.remove(event.subject().id()); |
| } |
| } |
| } |
| } |
| |