| package org.onlab.onos.store.flow.impl; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| import static org.slf4j.LoggerFactory.getLogger; |
| import static org.onlab.onos.store.flow.ReplicaInfoEvent.Type.MASTER_CHANGED; |
| |
| import java.util.Collections; |
| import java.util.List; |
| |
| 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.onlab.onos.cluster.NodeId; |
| import org.onlab.onos.event.AbstractListenerRegistry; |
| import org.onlab.onos.event.EventDeliveryService; |
| import org.onlab.onos.mastership.MastershipEvent; |
| import org.onlab.onos.mastership.MastershipListener; |
| import org.onlab.onos.mastership.MastershipService; |
| import org.onlab.onos.net.DeviceId; |
| import org.onlab.onos.store.flow.ReplicaInfo; |
| import org.onlab.onos.store.flow.ReplicaInfoEvent; |
| import org.onlab.onos.store.flow.ReplicaInfoEventListener; |
| import org.onlab.onos.store.flow.ReplicaInfoService; |
| import org.slf4j.Logger; |
| |
| /** |
| * Manages replica placement information. |
| */ |
| @Component(immediate = true) |
| @Service |
| public class ReplicaInfoManager implements ReplicaInfoService { |
| |
| private final Logger log = getLogger(getClass()); |
| |
| private final MastershipListener mastershipListener = new InternalMastershipListener(); |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected EventDeliveryService eventDispatcher; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected MastershipService mastershipService; |
| |
| protected final AbstractListenerRegistry<ReplicaInfoEvent, ReplicaInfoEventListener> |
| listenerRegistry = new AbstractListenerRegistry<>(); |
| |
| @Activate |
| public void activate() { |
| eventDispatcher.addSink(ReplicaInfoEvent.class, listenerRegistry); |
| mastershipService.addListener(mastershipListener); |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| eventDispatcher.removeSink(ReplicaInfoEvent.class); |
| mastershipService.removeListener(mastershipListener); |
| log.info("Stopped"); |
| } |
| |
| @Override |
| public ReplicaInfo getReplicaInfoFor(DeviceId deviceId) { |
| // TODO: populate backup List when we reach the point we need them. |
| return new ReplicaInfo(mastershipService.getMasterFor(deviceId), |
| Collections.<NodeId>emptyList()); |
| } |
| |
| @Override |
| public void addListener(ReplicaInfoEventListener listener) { |
| listenerRegistry.addListener(checkNotNull(listener)); |
| } |
| |
| @Override |
| public void removeListener(ReplicaInfoEventListener listener) { |
| listenerRegistry.removeListener(checkNotNull(listener)); |
| } |
| |
| final class InternalMastershipListener implements MastershipListener { |
| |
| @Override |
| public void event(MastershipEvent event) { |
| // TODO: distinguish stby list update, when MastershipService, |
| // start publishing them |
| final List<NodeId> standbyList = Collections.<NodeId>emptyList(); |
| eventDispatcher.post(new ReplicaInfoEvent(MASTER_CHANGED, |
| event.subject(), |
| new ReplicaInfo(event.node(), standbyList))); |
| } |
| } |
| |
| } |