Madan Jampani | 620f70d | 2016-01-30 22:22:47 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2016 Open Networking Laboratory |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.onosproject.cluster.impl; |
| 17 | |
| 18 | import static org.slf4j.LoggerFactory.getLogger; |
| 19 | |
| 20 | import java.util.Map; |
| 21 | import java.util.concurrent.Executors; |
| 22 | import java.util.concurrent.ScheduledExecutorService; |
| 23 | import java.util.concurrent.TimeUnit; |
| 24 | |
| 25 | import org.apache.felix.scr.annotations.Activate; |
| 26 | import org.apache.felix.scr.annotations.Component; |
| 27 | import org.apache.felix.scr.annotations.Deactivate; |
| 28 | import org.apache.felix.scr.annotations.Reference; |
| 29 | import org.apache.felix.scr.annotations.ReferenceCardinality; |
| 30 | import org.apache.felix.scr.annotations.Service; |
| 31 | import org.onlab.util.Tools; |
| 32 | import org.onosproject.cluster.ClusterService; |
| 33 | import org.onosproject.cluster.ControllerNode; |
| 34 | import org.onosproject.cluster.Leadership; |
| 35 | import org.onosproject.cluster.LeadershipAdminService; |
| 36 | import org.onosproject.cluster.LeadershipEvent; |
| 37 | import org.onosproject.cluster.LeadershipEventListener; |
| 38 | import org.onosproject.cluster.LeadershipService; |
| 39 | import org.onosproject.cluster.LeadershipStore; |
| 40 | import org.onosproject.cluster.LeadershipStoreDelegate; |
| 41 | import org.onosproject.cluster.NodeId; |
| 42 | import org.onosproject.event.AbstractListenerManager; |
| 43 | import org.slf4j.Logger; |
| 44 | |
| 45 | import com.google.common.collect.Maps; |
| 46 | |
| 47 | /** |
| 48 | * Implementation of {@link LeadershipService} and {@link LeadershipAdminService}. |
| 49 | */ |
| 50 | @Component(immediate = true) |
| 51 | @Service |
| 52 | public class LeadershipManager |
| 53 | extends AbstractListenerManager<LeadershipEvent, LeadershipEventListener> |
| 54 | implements LeadershipService, LeadershipAdminService { |
| 55 | |
| 56 | private final Logger log = getLogger(getClass()); |
| 57 | |
| 58 | private LeadershipStoreDelegate delegate = this::post; |
| 59 | |
| 60 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 61 | protected ClusterService clusterService; |
| 62 | |
| 63 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 64 | protected LeadershipStore store; |
| 65 | |
| 66 | private NodeId localNodeId; |
| 67 | |
| 68 | private final ScheduledExecutorService deadlockDetector = |
| 69 | Executors.newSingleThreadScheduledExecutor(Tools.groupedThreads("onos/leadership", "")); |
| 70 | |
| 71 | @Activate |
| 72 | public void activate() { |
| 73 | localNodeId = clusterService.getLocalNode().id(); |
| 74 | store.setDelegate(delegate); |
| 75 | eventDispatcher.addSink(LeadershipEvent.class, listenerRegistry); |
| 76 | deadlockDetector.scheduleWithFixedDelay(() -> clusterService.getNodes() |
| 77 | .stream() |
| 78 | .map(ControllerNode::id) |
| 79 | .filter(id -> clusterService.getState(id) != ControllerNode.State.ACTIVE) |
| 80 | .forEach(this::unregister), 0, 2, TimeUnit.SECONDS); |
| 81 | log.info("Started"); |
| 82 | } |
| 83 | |
| 84 | @Deactivate |
| 85 | public void deactivate() { |
| 86 | deadlockDetector.shutdown(); |
| 87 | Maps.filterValues(store.getLeaderships(), v -> v.candidates().contains(localNodeId)) |
| 88 | .keySet() |
| 89 | .forEach(this::withdraw); |
| 90 | store.unsetDelegate(delegate); |
| 91 | eventDispatcher.removeSink(LeadershipEvent.class); |
| 92 | log.info("Stopped"); |
| 93 | } |
| 94 | |
| 95 | @Override |
| 96 | public Leadership getLeadership(String topic) { |
| 97 | return store.getLeadership(topic); |
| 98 | } |
| 99 | |
| 100 | @Override |
| 101 | public Leadership runForLeadership(String topic) { |
| 102 | return store.addRegistration(topic); |
| 103 | } |
| 104 | |
| 105 | @Override |
| 106 | public void withdraw(String topic) { |
| 107 | store.removeRegistration(topic); |
| 108 | } |
| 109 | |
| 110 | @Override |
| 111 | public Map<String, Leadership> getLeaderBoard() { |
| 112 | return store.getLeaderships(); |
| 113 | } |
| 114 | |
| 115 | @Override |
| 116 | public boolean transferLeadership(String topic, NodeId to) { |
| 117 | return store.moveLeadership(topic, to); |
| 118 | } |
| 119 | |
| 120 | @Override |
| 121 | public void unregister(NodeId nodeId) { |
| 122 | store.removeRegistration(nodeId); |
| 123 | } |
| 124 | |
| 125 | @Override |
| 126 | public boolean promoteToTopOfCandidateList(String topic, NodeId nodeId) { |
| 127 | return store.makeTopCandidate(topic, nodeId); |
| 128 | } |
| 129 | } |