Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -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.store.primitives.resources.impl; |
| 17 | |
| 18 | import io.atomix.catalyst.util.Listener; |
| 19 | import io.atomix.copycat.client.CopycatClient; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 20 | import io.atomix.resource.Resource; |
| 21 | import io.atomix.resource.ResourceTypeInfo; |
| 22 | |
Madan Jampani | 0c0cdc6 | 2016-02-22 16:54:06 -0800 | [diff] [blame] | 23 | import java.util.List; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 24 | import java.util.Map; |
| 25 | import java.util.Set; |
| 26 | import java.util.concurrent.CompletableFuture; |
| 27 | import java.util.function.Consumer; |
| 28 | |
| 29 | import org.onosproject.cluster.Leadership; |
| 30 | import org.onosproject.cluster.NodeId; |
| 31 | import org.onosproject.event.Change; |
Madan Jampani | 27a2a3d | 2016-03-03 08:46:24 -0800 | [diff] [blame^] | 32 | import org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorCommands.Anoint; |
| 33 | import org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorCommands.GetAllLeaderships; |
| 34 | import org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorCommands.GetElectedTopics; |
| 35 | import org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorCommands.GetLeadership; |
| 36 | import org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorCommands.Listen; |
| 37 | import org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorCommands.Promote; |
| 38 | import org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorCommands.Run; |
| 39 | import org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorCommands.Unlisten; |
| 40 | import org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorCommands.Withdraw; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 41 | import org.onosproject.store.service.AsyncLeaderElector; |
| 42 | |
| 43 | import com.google.common.collect.Sets; |
| 44 | |
| 45 | /** |
| 46 | * Distributed resource providing the {@link AsyncLeaderElector} primitive. |
| 47 | */ |
Madan Jampani | 86cb243 | 2016-02-17 11:07:56 -0800 | [diff] [blame] | 48 | @ResourceTypeInfo(id = -152, |
| 49 | stateMachine = AtomixLeaderElectorState.class, |
| 50 | typeResolver = AtomixLeaderElectorCommands.TypeResolver.class) |
| 51 | public class AtomixLeaderElector extends Resource<AtomixLeaderElector> |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 52 | implements AsyncLeaderElector { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 53 | private final Set<Consumer<Change<Leadership>>> leadershipChangeListeners = |
| 54 | Sets.newConcurrentHashSet(); |
| 55 | |
Madan Jampani | c94b485 | 2016-02-23 18:18:37 -0800 | [diff] [blame] | 56 | public static final String CHANGE_SUBJECT = "leadershipChangeEvents"; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 57 | private Listener<Change<Leadership>> listener; |
| 58 | |
| 59 | public AtomixLeaderElector(CopycatClient client, Resource.Options options) { |
| 60 | super(client, options); |
| 61 | } |
| 62 | |
| 63 | @Override |
| 64 | public String name() { |
| 65 | return null; |
| 66 | } |
| 67 | |
| 68 | @Override |
| 69 | public CompletableFuture<AtomixLeaderElector> open() { |
| 70 | return super.open().thenApply(result -> { |
Madan Jampani | 0c0cdc6 | 2016-02-22 16:54:06 -0800 | [diff] [blame] | 71 | client.onEvent(CHANGE_SUBJECT, this::handleEvent); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 72 | return result; |
| 73 | }); |
| 74 | } |
| 75 | |
Madan Jampani | 0c0cdc6 | 2016-02-22 16:54:06 -0800 | [diff] [blame] | 76 | private void handleEvent(List<Change<Leadership>> changes) { |
| 77 | changes.forEach(change -> leadershipChangeListeners.forEach(l -> l.accept(change))); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 78 | } |
| 79 | |
| 80 | @Override |
| 81 | public CompletableFuture<Leadership> run(String topic, NodeId nodeId) { |
Madan Jampani | 27a2a3d | 2016-03-03 08:46:24 -0800 | [diff] [blame^] | 82 | return submit(new Run(topic, nodeId)); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 83 | } |
| 84 | |
| 85 | @Override |
| 86 | public CompletableFuture<Void> withdraw(String topic) { |
Madan Jampani | 27a2a3d | 2016-03-03 08:46:24 -0800 | [diff] [blame^] | 87 | return submit(new Withdraw(topic)); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 88 | } |
| 89 | |
| 90 | @Override |
| 91 | public CompletableFuture<Boolean> anoint(String topic, NodeId nodeId) { |
Madan Jampani | 27a2a3d | 2016-03-03 08:46:24 -0800 | [diff] [blame^] | 92 | return submit(new Anoint(topic, nodeId)); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 93 | } |
| 94 | |
| 95 | @Override |
Madan Jampani | 0c0cdc6 | 2016-02-22 16:54:06 -0800 | [diff] [blame] | 96 | public CompletableFuture<Boolean> promote(String topic, NodeId nodeId) { |
Madan Jampani | 27a2a3d | 2016-03-03 08:46:24 -0800 | [diff] [blame^] | 97 | return submit(new Promote(topic, nodeId)); |
Madan Jampani | 0c0cdc6 | 2016-02-22 16:54:06 -0800 | [diff] [blame] | 98 | } |
| 99 | |
| 100 | @Override |
| 101 | public CompletableFuture<Void> evict(NodeId nodeId) { |
| 102 | return submit(new AtomixLeaderElectorCommands.Evict(nodeId)); |
| 103 | } |
| 104 | |
| 105 | @Override |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 106 | public CompletableFuture<Leadership> getLeadership(String topic) { |
Madan Jampani | 27a2a3d | 2016-03-03 08:46:24 -0800 | [diff] [blame^] | 107 | return submit(new GetLeadership(topic)); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 108 | } |
| 109 | |
| 110 | @Override |
| 111 | public CompletableFuture<Map<String, Leadership>> getLeaderships() { |
Madan Jampani | 27a2a3d | 2016-03-03 08:46:24 -0800 | [diff] [blame^] | 112 | return submit(new GetAllLeaderships()); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 113 | } |
| 114 | |
| 115 | public CompletableFuture<Set<String>> getElectedTopics(NodeId nodeId) { |
Madan Jampani | 27a2a3d | 2016-03-03 08:46:24 -0800 | [diff] [blame^] | 116 | return submit(new GetElectedTopics(nodeId)); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 117 | } |
| 118 | |
Madan Jampani | 27a2a3d | 2016-03-03 08:46:24 -0800 | [diff] [blame^] | 119 | @Override |
| 120 | public synchronized CompletableFuture<Void> addChangeListener(Consumer<Change<Leadership>> consumer) { |
| 121 | if (leadershipChangeListeners.isEmpty()) { |
| 122 | return submit(new Listen()).thenRun(() -> leadershipChangeListeners.add(consumer)); |
| 123 | } else { |
| 124 | leadershipChangeListeners.add(consumer); |
| 125 | return CompletableFuture.completedFuture(null); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 126 | } |
| 127 | } |
| 128 | |
| 129 | @Override |
Madan Jampani | 27a2a3d | 2016-03-03 08:46:24 -0800 | [diff] [blame^] | 130 | public synchronized CompletableFuture<Void> removeChangeListener(Consumer<Change<Leadership>> consumer) { |
| 131 | if (leadershipChangeListeners.remove(listener) && leadershipChangeListeners.isEmpty()) { |
| 132 | return submit(new Unlisten()).thenApply(v -> null); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 133 | } |
| 134 | return CompletableFuture.completedFuture(null); |
| 135 | } |
| 136 | } |