| /* |
| * Copyright 2014 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.store.device.impl; |
| |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| 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.Service; |
| import org.onosproject.mastership.MastershipTerm; |
| import org.onosproject.net.DeviceId; |
| import org.onosproject.net.device.DeviceClockProviderService; |
| import org.onosproject.net.device.DeviceClockService; |
| import org.onosproject.store.Timestamp; |
| import org.onosproject.store.impl.MastershipBasedTimestamp; |
| import org.slf4j.Logger; |
| |
| /** |
| * Clock service to issue Timestamp based on Device Mastership. |
| */ |
| @Component(immediate = true) |
| @Service |
| public class DeviceClockManager implements DeviceClockService, DeviceClockProviderService { |
| |
| private final Logger log = getLogger(getClass()); |
| |
| // TODO: Implement per device ticker that is reset to 0 at the beginning of a new term. |
| private final AtomicInteger ticker = new AtomicInteger(0); |
| private ConcurrentMap<DeviceId, MastershipTerm> deviceMastershipTerms = new ConcurrentHashMap<>(); |
| |
| @Activate |
| public void activate() { |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| log.info("Stopped"); |
| } |
| |
| @Override |
| public Timestamp getTimestamp(DeviceId deviceId) { |
| MastershipTerm term = deviceMastershipTerms.get(deviceId); |
| log.trace("term info for {} is: {}", deviceId, term); |
| |
| if (term == null) { |
| throw new IllegalStateException("Requesting timestamp for a deviceId without mastership"); |
| } |
| return new MastershipBasedTimestamp(term.termNumber(), ticker.incrementAndGet()); |
| } |
| |
| @Override |
| public void setMastershipTerm(DeviceId deviceId, MastershipTerm term) { |
| log.info("adding term info {} {}", deviceId, term.master()); |
| deviceMastershipTerms.put(deviceId, term); |
| } |
| |
| @Override |
| public boolean isTimestampAvailable(DeviceId deviceId) { |
| return deviceMastershipTerms.containsKey(deviceId); |
| } |
| } |