| /* |
| * Copyright 2014-present 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.atomic.AtomicLong; |
| |
| 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.apache.felix.scr.annotations.Service; |
| import org.onosproject.cluster.ClusterService; |
| import org.onosproject.cluster.NodeId; |
| import org.onosproject.mastership.MastershipTerm; |
| import org.onosproject.mastership.MastershipTermService; |
| import org.onosproject.net.DeviceId; |
| 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 { |
| |
| private final Logger log = getLogger(getClass()); |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected MastershipTermService mastershipTermService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected ClusterService clusterService; |
| |
| protected NodeId localNodeId; |
| |
| private final AtomicLong ticker = new AtomicLong(0); |
| |
| @Activate |
| public void activate() { |
| localNodeId = clusterService.getLocalNode().id(); |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| log.info("Stopped"); |
| } |
| |
| @Override |
| public Timestamp getTimestamp(DeviceId deviceId) { |
| MastershipTerm term = mastershipTermService.getMastershipTerm(deviceId); |
| if (term == null || !localNodeId.equals(term.master())) { |
| throw new IllegalStateException("Requesting timestamp for " + deviceId + " without mastership"); |
| } |
| return new MastershipBasedTimestamp(term.termNumber(), ticker.incrementAndGet()); |
| } |
| |
| @Override |
| public boolean isTimestampAvailable(DeviceId deviceId) { |
| MastershipTerm term = mastershipTermService.getMastershipTerm(deviceId); |
| return term != null && localNodeId.equals(term.master()); |
| } |
| } |