Yuta HIGUCHI | d76830b | 2014-09-30 19:08:40 -0700 | [diff] [blame] | 1 | package org.onlab.onos.store.device.impl; |
| 2 | |
| 3 | import java.util.Collection; |
| 4 | import java.util.HashMap; |
| 5 | import java.util.HashSet; |
| 6 | import java.util.Map; |
| 7 | import java.util.Set; |
| 8 | |
| 9 | import org.onlab.onos.cluster.NodeId; |
| 10 | import org.onlab.onos.net.Device; |
| 11 | import org.onlab.onos.net.DeviceId; |
| 12 | import org.onlab.onos.store.Timestamp; |
Yuta HIGUCHI | c057c63 | 2014-10-06 18:38:14 -0700 | [diff] [blame^] | 13 | import org.onlab.onos.store.common.impl.AntiEntropyReply; |
Yuta HIGUCHI | d76830b | 2014-09-30 19:08:40 -0700 | [diff] [blame] | 14 | |
| 15 | import com.google.common.collect.ImmutableMap; |
| 16 | import com.google.common.collect.ImmutableSet; |
| 17 | |
| 18 | public class DeviceAntiEntropyReply |
| 19 | extends AntiEntropyReply<DeviceId, VersionedValue<Device>> { |
| 20 | |
| 21 | |
| 22 | public DeviceAntiEntropyReply(NodeId sender, |
| 23 | Map<DeviceId, VersionedValue<Device>> suggestion, |
| 24 | Set<DeviceId> request) { |
| 25 | super(sender, suggestion, request); |
| 26 | } |
| 27 | |
| 28 | /** |
| 29 | * Creates a reply to Anti-Entropy advertisement. |
| 30 | * |
| 31 | * @param advertisement to respond to |
| 32 | * @param self node identifier representing local node |
| 33 | * @param localValues local values held on this node |
| 34 | * @return reply message |
| 35 | */ |
| 36 | public static DeviceAntiEntropyReply reply( |
| 37 | DeviceAntiEntropyAdvertisement advertisement, |
| 38 | NodeId self, |
| 39 | Collection<VersionedValue<Device>> localValues |
| 40 | ) { |
| 41 | |
| 42 | ImmutableMap<DeviceId, Timestamp> ads = advertisement.advertisement(); |
| 43 | |
| 44 | ImmutableMap.Builder<DeviceId, VersionedValue<Device>> |
| 45 | sug = ImmutableMap.builder(); |
| 46 | |
| 47 | Set<DeviceId> req = new HashSet<>(ads.keySet()); |
| 48 | |
| 49 | for (VersionedValue<Device> e : localValues) { |
| 50 | final DeviceId id = e.entity().id(); |
| 51 | final Timestamp local = e.timestamp(); |
| 52 | final Timestamp theirs = ads.get(id); |
| 53 | if (theirs == null) { |
| 54 | // they don't have it, suggest |
| 55 | sug.put(id, e); |
| 56 | // don't need theirs |
| 57 | req.remove(id); |
| 58 | } else if (local.compareTo(theirs) < 0) { |
| 59 | // they got older one, suggest |
| 60 | sug.put(id, e); |
| 61 | // don't need theirs |
| 62 | req.remove(id); |
| 63 | } else if (local.equals(theirs)) { |
| 64 | // same, don't need theirs |
| 65 | req.remove(id); |
| 66 | } |
| 67 | } |
| 68 | |
| 69 | return new DeviceAntiEntropyReply(self, sug.build(), req); |
| 70 | } |
| 71 | |
| 72 | /** |
| 73 | * Creates a reply to request for values held locally. |
| 74 | * |
| 75 | * @param requests message containing the request |
| 76 | * @param self node identifier representing local node |
| 77 | * @param localValues local valeds held on this node |
| 78 | * @return reply message |
| 79 | */ |
| 80 | public static DeviceAntiEntropyReply reply( |
| 81 | DeviceAntiEntropyReply requests, |
| 82 | NodeId self, |
| 83 | Map<DeviceId, VersionedValue<Device>> localValues |
| 84 | ) { |
| 85 | |
| 86 | Set<DeviceId> reqs = requests.request(); |
| 87 | |
| 88 | Map<DeviceId, VersionedValue<Device>> requested = new HashMap<>(reqs.size()); |
| 89 | for (DeviceId id : reqs) { |
| 90 | final VersionedValue<Device> value = localValues.get(id); |
| 91 | if (value != null) { |
| 92 | requested.put(id, value); |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | Set<DeviceId> empty = ImmutableSet.of(); |
| 97 | return new DeviceAntiEntropyReply(self, requested, empty); |
| 98 | } |
| 99 | |
| 100 | // For serializer |
| 101 | protected DeviceAntiEntropyReply() {} |
| 102 | } |