tom | ea961ff | 2014-10-01 12:45:15 -0700 | [diff] [blame] | 1 | package org.onlab.onos.store.trivial.impl; |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 2 | |
| 3 | import static org.slf4j.LoggerFactory.getLogger; |
| 4 | |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 5 | import java.util.ArrayList; |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 6 | import java.util.Collections; |
Ayaka Koshibe | b70d34b | 2014-09-25 15:43:01 -0700 | [diff] [blame] | 7 | import java.util.HashMap; |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 8 | import java.util.HashSet; |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 9 | import java.util.List; |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 10 | import java.util.Map; |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 11 | import java.util.Set; |
Ayaka Koshibe | b70d34b | 2014-09-25 15:43:01 -0700 | [diff] [blame] | 12 | import java.util.concurrent.atomic.AtomicInteger; |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 13 | |
| 14 | import org.apache.felix.scr.annotations.Activate; |
| 15 | import org.apache.felix.scr.annotations.Component; |
| 16 | import org.apache.felix.scr.annotations.Deactivate; |
| 17 | import org.apache.felix.scr.annotations.Service; |
| 18 | import org.onlab.onos.cluster.ControllerNode; |
| 19 | import org.onlab.onos.cluster.DefaultControllerNode; |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 20 | import org.onlab.onos.cluster.NodeId; |
Yuta HIGUCHI | 80912e6 | 2014-10-12 00:15:47 -0700 | [diff] [blame] | 21 | import org.onlab.onos.mastership.MastershipEvent; |
| 22 | import org.onlab.onos.mastership.MastershipStore; |
| 23 | import org.onlab.onos.mastership.MastershipStoreDelegate; |
| 24 | import org.onlab.onos.mastership.MastershipTerm; |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 25 | import org.onlab.onos.net.DeviceId; |
| 26 | import org.onlab.onos.net.MastershipRole; |
tom | f80c972 | 2014-09-24 14:49:18 -0700 | [diff] [blame] | 27 | import org.onlab.onos.store.AbstractStore; |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 28 | import org.onlab.packet.IpPrefix; |
| 29 | import org.slf4j.Logger; |
| 30 | |
Yuta HIGUCHI | 80912e6 | 2014-10-12 00:15:47 -0700 | [diff] [blame] | 31 | import static org.onlab.onos.mastership.MastershipEvent.Type.*; |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 32 | |
| 33 | /** |
| 34 | * Manages inventory of controller mastership over devices using |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 35 | * trivial, non-distributed in-memory structures implementation. |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 36 | */ |
| 37 | @Component(immediate = true) |
| 38 | @Service |
tom | f80c972 | 2014-09-24 14:49:18 -0700 | [diff] [blame] | 39 | public class SimpleMastershipStore |
| 40 | extends AbstractStore<MastershipEvent, MastershipStoreDelegate> |
| 41 | implements MastershipStore { |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 42 | |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 43 | private final Logger log = getLogger(getClass()); |
| 44 | |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 45 | public static final IpPrefix LOCALHOST = IpPrefix.valueOf("127.0.0.1"); |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 46 | |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 47 | private ControllerNode instance = |
| 48 | new DefaultControllerNode(new NodeId("local"), LOCALHOST); |
| 49 | |
| 50 | //devices mapped to their masters, to emulate multiple nodes |
Ayaka Koshibe | 3de43ca | 2014-09-26 16:40:23 -0700 | [diff] [blame] | 51 | protected final Map<DeviceId, NodeId> masterMap = new HashMap<>(); |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 52 | //emulate backups with pile of nodes |
| 53 | protected final Set<NodeId> backups = new HashSet<>(); |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 54 | //terms |
Ayaka Koshibe | b70d34b | 2014-09-25 15:43:01 -0700 | [diff] [blame] | 55 | protected final Map<DeviceId, AtomicInteger> termMap = new HashMap<>(); |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 56 | |
| 57 | @Activate |
| 58 | public void activate() { |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 59 | log.info("Started"); |
| 60 | } |
| 61 | |
| 62 | @Deactivate |
| 63 | public void deactivate() { |
| 64 | log.info("Stopped"); |
| 65 | } |
| 66 | |
| 67 | @Override |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 68 | public MastershipEvent setMaster(NodeId nodeId, DeviceId deviceId) { |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 69 | MastershipRole role = getRole(nodeId, deviceId); |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 70 | |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 71 | synchronized (this) { |
| 72 | switch (role) { |
| 73 | case MASTER: |
| 74 | return null; |
| 75 | case STANDBY: |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 76 | masterMap.put(deviceId, nodeId); |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 77 | termMap.get(deviceId).incrementAndGet(); |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 78 | backups.add(nodeId); |
| 79 | break; |
| 80 | case NONE: |
| 81 | masterMap.put(deviceId, nodeId); |
| 82 | termMap.put(deviceId, new AtomicInteger()); |
| 83 | backups.add(nodeId); |
| 84 | break; |
| 85 | default: |
| 86 | log.warn("unknown Mastership Role {}", role); |
| 87 | return null; |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 88 | } |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 89 | } |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 90 | |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 91 | return new MastershipEvent(MASTER_CHANGED, deviceId, nodeId); |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 92 | } |
| 93 | |
| 94 | @Override |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 95 | public NodeId getMaster(DeviceId deviceId) { |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 96 | return masterMap.get(deviceId); |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 97 | } |
| 98 | |
| 99 | @Override |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 100 | public List<NodeId> getNodes(DeviceId deviceId) { |
Ayaka Koshibe | f9b02fc | 2014-10-15 17:07:05 -0700 | [diff] [blame] | 101 | List<NodeId> nodes = new ArrayList<>(); |
| 102 | |
| 103 | nodes.addAll(backups); |
| 104 | if (!nodes.contains(masterMap.get(deviceId))) { |
| 105 | nodes.add(masterMap.get(deviceId)); |
| 106 | } |
| 107 | |
| 108 | return Collections.unmodifiableList(nodes); |
Ayaka Koshibe | 45503ce | 2014-10-14 11:26:45 -0700 | [diff] [blame] | 109 | } |
| 110 | |
| 111 | @Override |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 112 | public Set<DeviceId> getDevices(NodeId nodeId) { |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 113 | Set<DeviceId> ids = new HashSet<>(); |
| 114 | for (Map.Entry<DeviceId, NodeId> d : masterMap.entrySet()) { |
| 115 | if (d.getValue().equals(nodeId)) { |
| 116 | ids.add(d.getKey()); |
| 117 | } |
| 118 | } |
| 119 | return Collections.unmodifiableSet(ids); |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 120 | } |
| 121 | |
| 122 | @Override |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 123 | public MastershipRole requestRole(DeviceId deviceId) { |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 124 | //query+possible reelection |
| 125 | NodeId node = instance.id(); |
| 126 | MastershipRole role = getRole(node, deviceId); |
| 127 | |
| 128 | switch (role) { |
| 129 | case MASTER: |
| 130 | break; |
| 131 | case STANDBY: |
| 132 | synchronized (this) { |
| 133 | //try to "re-elect", since we're really not distributed |
| 134 | NodeId rel = reelect(node); |
| 135 | if (rel == null) { |
| 136 | masterMap.put(deviceId, node); |
| 137 | termMap.put(deviceId, new AtomicInteger()); |
| 138 | role = MastershipRole.MASTER; |
| 139 | } |
| 140 | backups.add(node); |
| 141 | } |
| 142 | break; |
| 143 | case NONE: |
| 144 | //first to get to it, say we are master |
| 145 | synchronized (this) { |
| 146 | masterMap.put(deviceId, node); |
| 147 | termMap.put(deviceId, new AtomicInteger()); |
| 148 | backups.add(node); |
| 149 | role = MastershipRole.MASTER; |
| 150 | } |
| 151 | break; |
| 152 | default: |
| 153 | log.warn("unknown Mastership Role {}", role); |
| 154 | } |
| 155 | return role; |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 156 | } |
| 157 | |
| 158 | @Override |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 159 | public MastershipRole getRole(NodeId nodeId, DeviceId deviceId) { |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 160 | //just query |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 161 | NodeId current = masterMap.get(deviceId); |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 162 | MastershipRole role; |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 163 | |
| 164 | if (current == null) { |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 165 | if (backups.contains(nodeId)) { |
| 166 | role = MastershipRole.STANDBY; |
| 167 | } else { |
| 168 | role = MastershipRole.NONE; |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 169 | } |
| 170 | } else { |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 171 | if (current.equals(nodeId)) { |
| 172 | role = MastershipRole.MASTER; |
| 173 | } else { |
| 174 | role = MastershipRole.STANDBY; |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 175 | } |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 176 | } |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 177 | return role; |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 178 | } |
| 179 | |
Ayaka Koshibe | b70d34b | 2014-09-25 15:43:01 -0700 | [diff] [blame] | 180 | @Override |
| 181 | public MastershipTerm getTermFor(DeviceId deviceId) { |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 182 | if ((masterMap.get(deviceId) == null) || |
| 183 | (termMap.get(deviceId) == null)) { |
Ayaka Koshibe | b70d34b | 2014-09-25 15:43:01 -0700 | [diff] [blame] | 184 | return null; |
| 185 | } |
| 186 | return MastershipTerm.of( |
| 187 | masterMap.get(deviceId), termMap.get(deviceId).get()); |
| 188 | } |
| 189 | |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 190 | @Override |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 191 | public MastershipEvent setStandby(NodeId nodeId, DeviceId deviceId) { |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 192 | MastershipRole role = getRole(nodeId, deviceId); |
| 193 | synchronized (this) { |
| 194 | switch (role) { |
| 195 | case MASTER: |
| 196 | NodeId backup = reelect(nodeId); |
| 197 | if (backup == null) { |
| 198 | masterMap.remove(deviceId); |
| 199 | } else { |
| 200 | masterMap.put(deviceId, backup); |
| 201 | termMap.get(deviceId).incrementAndGet(); |
| 202 | return new MastershipEvent(MASTER_CHANGED, deviceId, backup); |
| 203 | } |
| 204 | case STANDBY: |
| 205 | case NONE: |
| 206 | if (!termMap.containsKey(deviceId)) { |
| 207 | termMap.put(deviceId, new AtomicInteger()); |
| 208 | } |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 209 | backups.add(nodeId); |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 210 | break; |
| 211 | default: |
| 212 | log.warn("unknown Mastership Role {}", role); |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 213 | } |
| 214 | } |
| 215 | return null; |
| 216 | } |
| 217 | |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 218 | //dumbly selects next-available node that's not the current one |
| 219 | //emulate leader election |
| 220 | private NodeId reelect(NodeId nodeId) { |
| 221 | NodeId backup = null; |
| 222 | for (NodeId n : backups) { |
| 223 | if (!n.equals(nodeId)) { |
| 224 | backup = n; |
| 225 | break; |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 226 | } |
| 227 | } |
Ayaka Koshibe | 971a38a | 2014-09-30 11:56:23 -0700 | [diff] [blame] | 228 | return backup; |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 229 | } |
| 230 | |
Ayaka Koshibe | c404770 | 2014-10-07 14:43:52 -0700 | [diff] [blame] | 231 | @Override |
| 232 | public MastershipEvent relinquishRole(NodeId nodeId, DeviceId deviceId) { |
| 233 | return setStandby(nodeId, deviceId); |
| 234 | } |
| 235 | |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 236 | } |