| package org.onlab.onos.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.onlab.onos.net.DeviceId; |
| import org.onlab.onos.net.device.DeviceMastershipTerm; |
| import org.onlab.onos.store.ClockProviderService; |
| import org.onlab.onos.store.ClockService; |
| import org.onlab.onos.store.Timestamp; |
| import org.onlab.onos.store.common.impl.DeviceMastershipBasedTimestamp; |
| import org.slf4j.Logger; |
| |
| /** |
| * Clock service to issue Timestamp based on Device Mastership. |
| */ |
| @Component(immediate = true) |
| @Service |
| public class DeviceClockManager implements ClockService, ClockProviderService { |
| |
| 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, DeviceMastershipTerm> deviceMastershipTerms = new ConcurrentHashMap<>(); |
| |
| @Activate |
| public void activate() { |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| log.info("Stopped"); |
| } |
| |
| @Override |
| public Timestamp getTimestamp(DeviceId deviceId) { |
| DeviceMastershipTerm term = deviceMastershipTerms.get(deviceId); |
| if (term == null) { |
| throw new IllegalStateException("Requesting timestamp for a deviceId without mastership"); |
| } |
| return new DeviceMastershipBasedTimestamp(term.termNumber(), ticker.incrementAndGet()); |
| } |
| |
| @Override |
| public void setMastershipTerm(DeviceId deviceId, DeviceMastershipTerm term) { |
| deviceMastershipTerms.put(deviceId, term); |
| } |
| } |