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/*
* Copyright 2014-2015 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.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());
}
}
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