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