Jordan Halterman | 00e92da | 2018-05-22 23:05:52 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2018-present Open Networking Foundation |
| 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 | */ |
Thomas Vachuska | b6d3167 | 2018-07-27 17:03:46 -0700 | [diff] [blame] | 16 | package org.onosproject.store.atomix.primitives.impl; |
Jordan Halterman | 00e92da | 2018-05-22 23:05:52 -0700 | [diff] [blame] | 17 | |
| 18 | import java.util.Map; |
| 19 | import java.util.concurrent.CompletableFuture; |
| 20 | import java.util.function.Consumer; |
| 21 | import java.util.stream.Collectors; |
| 22 | |
| 23 | import com.google.common.collect.Maps; |
| 24 | import io.atomix.core.election.LeadershipEventListener; |
| 25 | import org.onosproject.cluster.Leader; |
| 26 | import org.onosproject.cluster.Leadership; |
| 27 | import org.onosproject.cluster.NodeId; |
| 28 | import org.onosproject.event.Change; |
| 29 | import org.onosproject.store.service.AsyncLeaderElector; |
| 30 | |
Jordan Halterman | 6cf60c3 | 2018-08-15 01:22:51 -0700 | [diff] [blame] | 31 | import static org.onosproject.store.atomix.primitives.impl.AtomixFutures.adaptFuture; |
| 32 | |
Jordan Halterman | 00e92da | 2018-05-22 23:05:52 -0700 | [diff] [blame] | 33 | /** |
| 34 | * Atomix leader elector. |
| 35 | */ |
| 36 | public class AtomixLeaderElector implements AsyncLeaderElector { |
| 37 | private final io.atomix.core.election.AsyncLeaderElector<NodeId> atomixElector; |
| 38 | private final NodeId localNodeId; |
| 39 | private final Map<Consumer<Change<Leadership>>, LeadershipEventListener<NodeId>> listenerMap = |
| 40 | Maps.newIdentityHashMap(); |
| 41 | |
| 42 | public AtomixLeaderElector(io.atomix.core.election.AsyncLeaderElector<NodeId> atomixElector, NodeId localNodeId) { |
| 43 | this.atomixElector = atomixElector; |
| 44 | this.localNodeId = localNodeId; |
| 45 | } |
| 46 | |
| 47 | @Override |
| 48 | public String name() { |
| 49 | return atomixElector.name(); |
| 50 | } |
| 51 | |
| 52 | @Override |
| 53 | public CompletableFuture<Leadership> run(String topic, NodeId nodeId) { |
Jordan Halterman | 6cf60c3 | 2018-08-15 01:22:51 -0700 | [diff] [blame] | 54 | return adaptFuture(atomixElector.run(topic, nodeId)).thenApply(leadership -> toLeadership(topic, leadership)); |
Jordan Halterman | 00e92da | 2018-05-22 23:05:52 -0700 | [diff] [blame] | 55 | } |
| 56 | |
| 57 | @Override |
| 58 | public CompletableFuture<Void> withdraw(String topic) { |
Jordan Halterman | 6cf60c3 | 2018-08-15 01:22:51 -0700 | [diff] [blame] | 59 | return adaptFuture(atomixElector.withdraw(topic, localNodeId)); |
Jordan Halterman | 00e92da | 2018-05-22 23:05:52 -0700 | [diff] [blame] | 60 | } |
| 61 | |
| 62 | @Override |
| 63 | public CompletableFuture<Boolean> anoint(String topic, NodeId nodeId) { |
Jordan Halterman | 6cf60c3 | 2018-08-15 01:22:51 -0700 | [diff] [blame] | 64 | return adaptFuture(atomixElector.anoint(topic, nodeId)); |
Jordan Halterman | 00e92da | 2018-05-22 23:05:52 -0700 | [diff] [blame] | 65 | } |
| 66 | |
| 67 | @Override |
| 68 | public CompletableFuture<Void> evict(NodeId nodeId) { |
Jordan Halterman | 6cf60c3 | 2018-08-15 01:22:51 -0700 | [diff] [blame] | 69 | return adaptFuture(atomixElector.evict(nodeId)); |
Jordan Halterman | 00e92da | 2018-05-22 23:05:52 -0700 | [diff] [blame] | 70 | } |
| 71 | |
| 72 | @Override |
| 73 | public CompletableFuture<Boolean> promote(String topic, NodeId nodeId) { |
Jordan Halterman | 6cf60c3 | 2018-08-15 01:22:51 -0700 | [diff] [blame] | 74 | return adaptFuture(atomixElector.promote(topic, nodeId)); |
Jordan Halterman | 00e92da | 2018-05-22 23:05:52 -0700 | [diff] [blame] | 75 | } |
| 76 | |
| 77 | @Override |
| 78 | public CompletableFuture<Leadership> getLeadership(String topic) { |
Jordan Halterman | 6cf60c3 | 2018-08-15 01:22:51 -0700 | [diff] [blame] | 79 | return adaptFuture(atomixElector.getLeadership(topic)).thenApply(leadership -> toLeadership(topic, leadership)); |
Jordan Halterman | 00e92da | 2018-05-22 23:05:52 -0700 | [diff] [blame] | 80 | } |
| 81 | |
| 82 | @Override |
| 83 | public CompletableFuture<Map<String, Leadership>> getLeaderships() { |
Jordan Halterman | 6cf60c3 | 2018-08-15 01:22:51 -0700 | [diff] [blame] | 84 | return adaptFuture(atomixElector.getLeaderships()) |
Jordan Halterman | 00e92da | 2018-05-22 23:05:52 -0700 | [diff] [blame] | 85 | .thenApply(leaderships -> leaderships.entrySet().stream() |
| 86 | .collect(Collectors.toMap(e -> e.getKey(), e -> toLeadership(e.getKey(), e.getValue())))); |
| 87 | } |
| 88 | |
| 89 | @Override |
| 90 | public CompletableFuture<Void> addChangeListener(Consumer<Change<Leadership>> consumer) { |
| 91 | LeadershipEventListener<NodeId> atomixListener = event -> |
| 92 | consumer.accept(new Change<>( |
| 93 | toLeadership(event.topic(), event.oldLeadership()), |
| 94 | toLeadership(event.topic(), event.newLeadership()))); |
| 95 | listenerMap.put(consumer, atomixListener); |
Jordan Halterman | 6cf60c3 | 2018-08-15 01:22:51 -0700 | [diff] [blame] | 96 | return adaptFuture(atomixElector.addListener(atomixListener)); |
Jordan Halterman | 00e92da | 2018-05-22 23:05:52 -0700 | [diff] [blame] | 97 | } |
| 98 | |
| 99 | @Override |
| 100 | public CompletableFuture<Void> removeChangeListener(Consumer<Change<Leadership>> consumer) { |
| 101 | LeadershipEventListener<NodeId> atomixListener = listenerMap.remove(consumer); |
| 102 | if (atomixListener != null) { |
Jordan Halterman | 6cf60c3 | 2018-08-15 01:22:51 -0700 | [diff] [blame] | 103 | return adaptFuture(atomixElector.removeListener(atomixListener)); |
Jordan Halterman | 00e92da | 2018-05-22 23:05:52 -0700 | [diff] [blame] | 104 | } |
| 105 | return CompletableFuture.completedFuture(null); |
| 106 | } |
| 107 | |
| 108 | private Leadership toLeadership(String topic, io.atomix.core.election.Leadership<NodeId> leadership) { |
| 109 | return leadership != null |
| 110 | ? new Leadership(topic, toLeader(leadership.leader()), leadership.candidates()) |
| 111 | : null; |
| 112 | } |
| 113 | |
| 114 | private Leader toLeader(io.atomix.core.election.Leader<NodeId> leader) { |
| 115 | return leader != null ? new Leader(leader.id(), leader.term(), leader.timestamp()) : null; |
| 116 | } |
| 117 | } |