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; |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 8 | import java.util.List; |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 9 | import java.util.Map; |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 10 | import java.util.Set; |
Ayaka Koshibe | b70d34b | 2014-09-25 15:43:01 -0700 | [diff] [blame] | 11 | import java.util.concurrent.atomic.AtomicInteger; |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 12 | |
| 13 | import org.apache.felix.scr.annotations.Activate; |
| 14 | import org.apache.felix.scr.annotations.Component; |
| 15 | import org.apache.felix.scr.annotations.Deactivate; |
| 16 | import org.apache.felix.scr.annotations.Service; |
| 17 | import org.onlab.onos.cluster.ControllerNode; |
| 18 | import org.onlab.onos.cluster.DefaultControllerNode; |
| 19 | import org.onlab.onos.cluster.MastershipEvent; |
| 20 | import org.onlab.onos.cluster.MastershipStore; |
tom | f80c972 | 2014-09-24 14:49:18 -0700 | [diff] [blame] | 21 | import org.onlab.onos.cluster.MastershipStoreDelegate; |
Ayaka Koshibe | b70d34b | 2014-09-25 15:43:01 -0700 | [diff] [blame] | 22 | import org.onlab.onos.cluster.MastershipTerm; |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 23 | import org.onlab.onos.cluster.NodeId; |
| 24 | import org.onlab.onos.net.DeviceId; |
| 25 | import org.onlab.onos.net.MastershipRole; |
tom | f80c972 | 2014-09-24 14:49:18 -0700 | [diff] [blame] | 26 | import org.onlab.onos.store.AbstractStore; |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 27 | import org.onlab.packet.IpPrefix; |
| 28 | import org.slf4j.Logger; |
| 29 | |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 30 | import com.google.common.collect.Lists; |
| 31 | |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 32 | import static org.onlab.onos.cluster.MastershipEvent.Type.*; |
| 33 | |
| 34 | /** |
| 35 | * Manages inventory of controller mastership over devices using |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 36 | * trivial, non-distributed in-memory structures implementation. |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 37 | */ |
| 38 | @Component(immediate = true) |
| 39 | @Service |
tom | f80c972 | 2014-09-24 14:49:18 -0700 | [diff] [blame] | 40 | public class SimpleMastershipStore |
| 41 | extends AbstractStore<MastershipEvent, MastershipStoreDelegate> |
| 42 | implements MastershipStore { |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 43 | |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 44 | private final Logger log = getLogger(getClass()); |
| 45 | |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 46 | public static final IpPrefix LOCALHOST = IpPrefix.valueOf("127.0.0.1"); |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 47 | |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 48 | private ControllerNode instance = |
| 49 | new DefaultControllerNode(new NodeId("local"), LOCALHOST); |
| 50 | |
| 51 | //devices mapped to their masters, to emulate multiple nodes |
Ayaka Koshibe | 3de43ca | 2014-09-26 16:40:23 -0700 | [diff] [blame] | 52 | protected final Map<DeviceId, NodeId> masterMap = new HashMap<>(); |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 53 | //emulate backups |
| 54 | protected final Map<DeviceId, List<NodeId>> backupMap = new HashMap<>(); |
| 55 | //terms |
Ayaka Koshibe | b70d34b | 2014-09-25 15:43:01 -0700 | [diff] [blame] | 56 | protected final Map<DeviceId, AtomicInteger> termMap = new HashMap<>(); |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 57 | |
| 58 | @Activate |
| 59 | public void activate() { |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 60 | log.info("Started"); |
| 61 | } |
| 62 | |
| 63 | @Deactivate |
| 64 | public void deactivate() { |
| 65 | log.info("Stopped"); |
| 66 | } |
| 67 | |
| 68 | @Override |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 69 | public MastershipEvent setMaster(NodeId nodeId, DeviceId deviceId) { |
| 70 | |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 71 | NodeId current = masterMap.get(deviceId); |
| 72 | List<NodeId> backups = backupMap.get(deviceId); |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 73 | |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 74 | if (current == null) { |
| 75 | if (backups == null) { |
| 76 | //add new mapping to everything |
| 77 | synchronized (this) { |
| 78 | masterMap.put(deviceId, nodeId); |
| 79 | backups = Lists.newLinkedList(); |
| 80 | backupMap.put(deviceId, backups); |
| 81 | termMap.put(deviceId, new AtomicInteger()); |
| 82 | } |
| 83 | } else { |
| 84 | //set master to new node and remove from backups if there |
| 85 | synchronized (this) { |
| 86 | masterMap.put(deviceId, nodeId); |
| 87 | backups.remove(nodeId); |
| 88 | termMap.get(deviceId).incrementAndGet(); |
| 89 | } |
| 90 | } |
| 91 | } else if (current.equals(nodeId)) { |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 92 | return null; |
| 93 | } else { |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 94 | //add current to backup, set master to new node |
| 95 | masterMap.put(deviceId, nodeId); |
| 96 | backups.add(current); |
| 97 | backups.remove(nodeId); |
| 98 | termMap.get(deviceId).incrementAndGet(); |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 99 | } |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 100 | |
| 101 | updateStandby(nodeId, deviceId); |
| 102 | return new MastershipEvent(MASTER_CHANGED, deviceId, nodeId); |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 103 | } |
| 104 | |
| 105 | @Override |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 106 | public NodeId getMaster(DeviceId deviceId) { |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 107 | return masterMap.get(deviceId); |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 108 | } |
| 109 | |
| 110 | @Override |
| 111 | public Set<DeviceId> getDevices(NodeId nodeId) { |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 112 | Set<DeviceId> ids = new HashSet<>(); |
| 113 | for (Map.Entry<DeviceId, NodeId> d : masterMap.entrySet()) { |
| 114 | if (d.getValue().equals(nodeId)) { |
| 115 | ids.add(d.getKey()); |
| 116 | } |
| 117 | } |
| 118 | return Collections.unmodifiableSet(ids); |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 119 | } |
| 120 | |
| 121 | @Override |
tom | b41d1ac | 2014-09-24 01:51:24 -0700 | [diff] [blame] | 122 | public MastershipRole requestRole(DeviceId deviceId) { |
| 123 | return getRole(instance.id(), deviceId); |
| 124 | } |
| 125 | |
| 126 | @Override |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 127 | public MastershipRole getRole(NodeId nodeId, DeviceId deviceId) { |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 128 | NodeId current = masterMap.get(deviceId); |
| 129 | List<NodeId> backups = backupMap.get(deviceId); |
| 130 | |
| 131 | if (current == null) { |
| 132 | //masterMap or backup doesn't contain device. Say new node is MASTER |
| 133 | if (backups == null) { |
| 134 | synchronized (this) { |
| 135 | masterMap.put(deviceId, nodeId); |
| 136 | backups = Lists.newLinkedList(); |
| 137 | backupMap.put(deviceId, backups); |
| 138 | termMap.put(deviceId, new AtomicInteger()); |
| 139 | } |
| 140 | updateStandby(nodeId, deviceId); |
| 141 | return MastershipRole.MASTER; |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 142 | } |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 143 | |
| 144 | //device once existed, but got removed, and is now getting a backup. |
| 145 | if (!backups.contains(nodeId)) { |
| 146 | synchronized (this) { |
| 147 | backups.add(nodeId); |
| 148 | termMap.put(deviceId, new AtomicInteger()); |
| 149 | } |
| 150 | updateStandby(nodeId, deviceId); |
| 151 | } |
| 152 | |
| 153 | } else if (current.equals(nodeId)) { |
| 154 | return MastershipRole.MASTER; |
Ayaka Koshibe | 406d010 | 2014-09-24 16:08:12 -0700 | [diff] [blame] | 155 | } else { |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 156 | //once created, a device never has a null backups list. |
| 157 | if (!backups.contains(nodeId)) { |
| 158 | //we must have requested STANDBY setting |
| 159 | synchronized (this) { |
| 160 | backups.add(nodeId); |
| 161 | termMap.put(deviceId, new AtomicInteger()); |
| 162 | } |
| 163 | updateStandby(nodeId, deviceId); |
| 164 | } |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 165 | } |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 166 | |
| 167 | return MastershipRole.STANDBY; |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 168 | } |
| 169 | |
Ayaka Koshibe | b70d34b | 2014-09-25 15:43:01 -0700 | [diff] [blame] | 170 | @Override |
| 171 | public MastershipTerm getTermFor(DeviceId deviceId) { |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 172 | if ((masterMap.get(deviceId) == null) || |
| 173 | (termMap.get(deviceId) == null)) { |
Ayaka Koshibe | b70d34b | 2014-09-25 15:43:01 -0700 | [diff] [blame] | 174 | return null; |
| 175 | } |
| 176 | return MastershipTerm.of( |
| 177 | masterMap.get(deviceId), termMap.get(deviceId).get()); |
| 178 | } |
| 179 | |
Ayaka Koshibe | d9f693e | 2014-09-29 18:04:54 -0700 | [diff] [blame] | 180 | @Override |
| 181 | public MastershipEvent unsetMaster(NodeId nodeId, DeviceId deviceId) { |
| 182 | NodeId node = masterMap.get(deviceId); |
| 183 | |
| 184 | //TODO case where node is completely removed from the cluster? |
| 185 | if (node.equals(nodeId)) { |
| 186 | synchronized (this) { |
| 187 | //pick new node. |
| 188 | List<NodeId> backups = backupMap.get(deviceId); |
| 189 | |
| 190 | //no backups, so device is hosed |
| 191 | if (backups.isEmpty()) { |
| 192 | masterMap.remove(deviceId); |
| 193 | backups.add(nodeId); |
| 194 | return null; |
| 195 | } |
| 196 | NodeId backup = backups.remove(0); |
| 197 | masterMap.put(deviceId, backup); |
| 198 | backups.add(nodeId); |
| 199 | return new MastershipEvent(MASTER_CHANGED, deviceId, backup); |
| 200 | } |
| 201 | } |
| 202 | return null; |
| 203 | } |
| 204 | |
| 205 | //add node as STANDBY to maps un-scalably. |
| 206 | private void updateStandby(NodeId nodeId, DeviceId deviceId) { |
| 207 | for (Map.Entry<DeviceId, List<NodeId>> e : backupMap.entrySet()) { |
| 208 | DeviceId dev = e.getKey(); |
| 209 | if (dev.equals(deviceId)) { |
| 210 | continue; |
| 211 | } |
| 212 | synchronized (this) { |
| 213 | List<NodeId> nodes = e.getValue(); |
| 214 | if (!nodes.contains(nodeId)) { |
| 215 | nodes.add(nodeId); |
| 216 | } |
| 217 | } |
| 218 | } |
| 219 | } |
| 220 | |
Ayaka Koshibe | a7f044e | 2014-09-23 16:56:20 -0700 | [diff] [blame] | 221 | } |