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/*
* Copyright 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.core.impl;
import static org.slf4j.LoggerFactory.getLogger;
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.store.Timestamp;
import org.onosproject.store.impl.LogicalTimestamp;
import org.onosproject.store.service.AtomicCounter;
import org.onosproject.store.service.LogicalClockService;
import org.onosproject.store.service.StorageService;
import org.slf4j.Logger;
/**
* LogicalClockService implementation based on a AtomicCounter.
*/
@Component(immediate = true, enabled = true)
@Service
public class LogicalClockManager implements LogicalClockService {
private final Logger log = getLogger(getClass());
@Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
protected StorageService storageService;
private static final String SYSTEM_LOGICAL_CLOCK_COUNTER_NAME = "sys-clock-counter";
private AtomicCounter atomicCounter;
@Activate
public void activate() {
atomicCounter = storageService.atomicCounterBuilder()
.withName(SYSTEM_LOGICAL_CLOCK_COUNTER_NAME)
.withPartitionsDisabled()
.build();
log.info("Started");
}
@Deactivate
public void deactivate() {
log.info("Stopped");
}
@Override
public Timestamp getTimestamp() {
return new LogicalTimestamp(atomicCounter.incrementAndGet());
}
}
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