| /* |
| * Copyright 2017-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.net.meter.impl; |
| |
| import com.google.common.collect.Sets; |
| import org.onosproject.mastership.MastershipService; |
| import org.onosproject.net.Device; |
| 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.onosproject.net.meter.Meter; |
| import org.onosproject.net.meter.MeterOperation; |
| import org.onosproject.net.meter.MeterOperations; |
| import org.onosproject.net.meter.MeterProgrammable; |
| import org.onosproject.net.meter.MeterProvider; |
| |
| import org.onosproject.net.meter.MeterProviderService; |
| import org.onosproject.net.provider.AbstractProvider; |
| import org.onosproject.net.provider.ProviderId; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.Collection; |
| import java.util.Set; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.ScheduledExecutorService; |
| import java.util.concurrent.ScheduledFuture; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.TimeoutException; |
| |
| import static java.util.concurrent.Executors.newSingleThreadScheduledExecutor; |
| import static org.onlab.util.Tools.groupedThreads; |
| import static org.onosproject.net.device.DeviceEvent.Type.DEVICE_ADDED; |
| import static org.onosproject.net.device.DeviceEvent.Type.DEVICE_AVAILABILITY_CHANGED; |
| |
| /** |
| * Driver-based Meter provider. |
| */ |
| public class MeterDriverProvider extends AbstractProvider implements MeterProvider { |
| |
| private final Logger log = LoggerFactory.getLogger(getClass()); |
| |
| // To be extracted for reuse as we deal with other. |
| private static final String SCHEME = "default"; |
| private static final String PROVIDER_NAME = "org.onosproject.provider.meter"; |
| |
| // potentially positive device event |
| private static final Set<DeviceEvent.Type> POSITIVE_DEVICE_EVENT = |
| Sets.immutableEnumSet(DEVICE_ADDED, |
| DEVICE_AVAILABILITY_CHANGED); |
| |
| protected DeviceService deviceService; |
| protected MastershipService mastershipService; |
| MeterProviderService meterProviderService; |
| int pollFrequency; |
| |
| private InternalDeviceListener deviceListener = new InternalDeviceListener(); |
| private ScheduledExecutorService executor |
| = newSingleThreadScheduledExecutor(groupedThreads("MeterDriverProvider", "%d", log)); |
| private ScheduledFuture<?> poller = null; |
| |
| public MeterDriverProvider() { |
| super(new ProviderId(SCHEME, PROVIDER_NAME)); |
| } |
| |
| /** |
| * Initializes the provider with the necessary device service, meter provider service, |
| * mastership service and poll frequency. |
| * |
| * @param deviceService device service |
| * @param meterProviderService meter provider service |
| * @param mastershipService mastership service |
| * @param pollFrequency meter entry poll frequency |
| */ |
| void init(DeviceService deviceService, MeterProviderService meterProviderService, |
| MastershipService mastershipService, int pollFrequency) { |
| this.deviceService = deviceService; |
| this.meterProviderService = meterProviderService; |
| this.mastershipService = mastershipService; |
| this.pollFrequency = pollFrequency; |
| |
| deviceService.addListener(deviceListener); |
| |
| if (poller != null && !poller.isCancelled()) { |
| poller.cancel(false); |
| } |
| |
| poller = executor.scheduleAtFixedRate(this::pollMeters, pollFrequency, |
| pollFrequency, TimeUnit.SECONDS); |
| |
| } |
| |
| void terminate() { |
| deviceService.removeListener(deviceListener); |
| deviceService = null; |
| meterProviderService = null; |
| mastershipService = null; |
| poller.cancel(true); |
| executor.shutdown(); |
| } |
| |
| private void pollMeters() { |
| deviceService.getAvailableDevices().forEach(device -> { |
| if (mastershipService.isLocalMaster(device.id()) && |
| device.is(MeterProgrammable.class)) { |
| pollDeviceMeters(device.id()); |
| } |
| }); |
| } |
| |
| @Override |
| public void performMeterOperation(DeviceId deviceId, MeterOperations meterOps) { |
| meterOps.operations().forEach(meterOperation -> performMeterOperation(deviceId, meterOperation)); |
| } |
| |
| @Override |
| public void performMeterOperation(DeviceId deviceId, MeterOperation meterOp) { |
| MeterProgrammable programmable = getMeterProgrammable(deviceId); |
| if (programmable != null) { |
| programmable.performMeterOperation(meterOp); |
| } |
| } |
| |
| private void pollDeviceMeters(DeviceId deviceId) { |
| Collection<Meter> meters = null; |
| try { |
| meters = getMeterProgrammable(deviceId).getMeters().get(pollFrequency, TimeUnit.SECONDS); |
| } catch (InterruptedException | ExecutionException | TimeoutException e) { |
| log.warn("Unable to get the Meters from {}, error: {}", deviceId, e.getMessage()); |
| log.debug("Exception: ", e); |
| } |
| meterProviderService.pushMeterMetrics(deviceId, meters); |
| } |
| |
| private MeterProgrammable getMeterProgrammable(DeviceId deviceId) { |
| Device device = deviceService.getDevice(deviceId); |
| if (device.is(MeterProgrammable.class)) { |
| return device.as(MeterProgrammable.class); |
| } else { |
| log.debug("Device {} is not meter programmable", deviceId); |
| return null; |
| } |
| } |
| |
| private class InternalDeviceListener implements DeviceListener { |
| |
| @Override |
| public void event(DeviceEvent event) { |
| executor.execute(() -> handleEvent(event)); |
| } |
| |
| @Override |
| public boolean isRelevant(DeviceEvent event) { |
| Device device = event.subject(); |
| return POSITIVE_DEVICE_EVENT.contains(event.type()) && |
| device.is(MeterProgrammable.class); |
| } |
| |
| private void handleEvent(DeviceEvent event) { |
| Device device = event.subject(); |
| boolean isRelevant = mastershipService.isLocalMaster(device.id()) && |
| deviceService.isAvailable(device.id()); |
| |
| if (isRelevant) { |
| pollDeviceMeters(device.id()); |
| } |
| } |
| } |
| } |