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 | 65f24bb | 2016-03-15 15:16:18 -0700 | [diff] [blame] | 20 | import io.atomix.resource.AbstractResource; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 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; |
Madan Jampani | 65f24bb | 2016-03-15 15:16:18 -0700 | [diff] [blame] | 25 | import java.util.Properties; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 26 | import java.util.Set; |
| 27 | import java.util.concurrent.CompletableFuture; |
| 28 | import java.util.function.Consumer; |
| 29 | |
| 30 | import org.onosproject.cluster.Leadership; |
| 31 | import org.onosproject.cluster.NodeId; |
| 32 | import org.onosproject.event.Change; |
Madan Jampani | 27a2a3d | 2016-03-03 08:46:24 -0800 | [diff] [blame] | 33 | import org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorCommands.Anoint; |
| 34 | import org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorCommands.GetAllLeaderships; |
| 35 | import org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorCommands.GetElectedTopics; |
| 36 | import org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorCommands.GetLeadership; |
| 37 | import org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorCommands.Listen; |
| 38 | import org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorCommands.Promote; |
| 39 | import org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorCommands.Run; |
| 40 | import org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorCommands.Unlisten; |
| 41 | import org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorCommands.Withdraw; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 42 | import org.onosproject.store.service.AsyncLeaderElector; |
| 43 | |
| 44 | import com.google.common.collect.Sets; |
| 45 | |
| 46 | /** |
| 47 | * Distributed resource providing the {@link AsyncLeaderElector} primitive. |
| 48 | */ |
Madan Jampani | 966a585 | 2016-04-01 10:39:57 -0700 | [diff] [blame] | 49 | @ResourceTypeInfo(id = -152, factory = AtomixLeaderElectorFactory.class) |
Madan Jampani | 65f24bb | 2016-03-15 15:16:18 -0700 | [diff] [blame] | 50 | public class AtomixLeaderElector extends AbstractResource<AtomixLeaderElector> |
Madan Jampani | fc98177 | 2016-02-16 09:46:42 -0800 | [diff] [blame] | 51 | implements AsyncLeaderElector { |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 52 | private final Set<Consumer<Change<Leadership>>> leadershipChangeListeners = |
| 53 | Sets.newConcurrentHashSet(); |
| 54 | |
Madan Jampani | c94b485 | 2016-02-23 18:18:37 -0800 | [diff] [blame] | 55 | public static final String CHANGE_SUBJECT = "leadershipChangeEvents"; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 56 | private Listener<Change<Leadership>> listener; |
| 57 | |
Madan Jampani | 65f24bb | 2016-03-15 15:16:18 -0700 | [diff] [blame] | 58 | public AtomixLeaderElector(CopycatClient client, Properties properties) { |
| 59 | super(client, properties); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 60 | } |
| 61 | |
| 62 | @Override |
| 63 | public String name() { |
| 64 | return null; |
| 65 | } |
| 66 | |
| 67 | @Override |
| 68 | public CompletableFuture<AtomixLeaderElector> open() { |
| 69 | return super.open().thenApply(result -> { |
Madan Jampani | 0c0cdc6 | 2016-02-22 16:54:06 -0800 | [diff] [blame] | 70 | client.onEvent(CHANGE_SUBJECT, this::handleEvent); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 71 | return result; |
| 72 | }); |
| 73 | } |
| 74 | |
Madan Jampani | 0c0cdc6 | 2016-02-22 16:54:06 -0800 | [diff] [blame] | 75 | private void handleEvent(List<Change<Leadership>> changes) { |
| 76 | changes.forEach(change -> leadershipChangeListeners.forEach(l -> l.accept(change))); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 77 | } |
| 78 | |
| 79 | @Override |
| 80 | public CompletableFuture<Leadership> run(String topic, NodeId nodeId) { |
Madan Jampani | 27a2a3d | 2016-03-03 08:46:24 -0800 | [diff] [blame] | 81 | return submit(new Run(topic, nodeId)); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 82 | } |
| 83 | |
| 84 | @Override |
| 85 | public CompletableFuture<Void> withdraw(String topic) { |
Madan Jampani | 27a2a3d | 2016-03-03 08:46:24 -0800 | [diff] [blame] | 86 | return submit(new Withdraw(topic)); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 87 | } |
| 88 | |
| 89 | @Override |
| 90 | public CompletableFuture<Boolean> anoint(String topic, NodeId nodeId) { |
Madan Jampani | 27a2a3d | 2016-03-03 08:46:24 -0800 | [diff] [blame] | 91 | return submit(new Anoint(topic, nodeId)); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 92 | } |
| 93 | |
| 94 | @Override |
Madan Jampani | 0c0cdc6 | 2016-02-22 16:54:06 -0800 | [diff] [blame] | 95 | public CompletableFuture<Boolean> promote(String topic, NodeId nodeId) { |
Madan Jampani | 27a2a3d | 2016-03-03 08:46:24 -0800 | [diff] [blame] | 96 | return submit(new Promote(topic, nodeId)); |
Madan Jampani | 0c0cdc6 | 2016-02-22 16:54:06 -0800 | [diff] [blame] | 97 | } |
| 98 | |
| 99 | @Override |
| 100 | public CompletableFuture<Void> evict(NodeId nodeId) { |
| 101 | return submit(new AtomixLeaderElectorCommands.Evict(nodeId)); |
| 102 | } |
| 103 | |
| 104 | @Override |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 105 | public CompletableFuture<Leadership> getLeadership(String topic) { |
Madan Jampani | 27a2a3d | 2016-03-03 08:46:24 -0800 | [diff] [blame] | 106 | return submit(new GetLeadership(topic)); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 107 | } |
| 108 | |
| 109 | @Override |
| 110 | public CompletableFuture<Map<String, Leadership>> getLeaderships() { |
Madan Jampani | 27a2a3d | 2016-03-03 08:46:24 -0800 | [diff] [blame] | 111 | return submit(new GetAllLeaderships()); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 112 | } |
| 113 | |
| 114 | public CompletableFuture<Set<String>> getElectedTopics(NodeId nodeId) { |
Madan Jampani | 27a2a3d | 2016-03-03 08:46:24 -0800 | [diff] [blame] | 115 | return submit(new GetElectedTopics(nodeId)); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 116 | } |
| 117 | |
Madan Jampani | 27a2a3d | 2016-03-03 08:46:24 -0800 | [diff] [blame] | 118 | @Override |
| 119 | public synchronized CompletableFuture<Void> addChangeListener(Consumer<Change<Leadership>> consumer) { |
| 120 | if (leadershipChangeListeners.isEmpty()) { |
| 121 | return submit(new Listen()).thenRun(() -> leadershipChangeListeners.add(consumer)); |
| 122 | } else { |
| 123 | leadershipChangeListeners.add(consumer); |
| 124 | return CompletableFuture.completedFuture(null); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 125 | } |
| 126 | } |
| 127 | |
| 128 | @Override |
Madan Jampani | 27a2a3d | 2016-03-03 08:46:24 -0800 | [diff] [blame] | 129 | public synchronized CompletableFuture<Void> removeChangeListener(Consumer<Change<Leadership>> consumer) { |
| 130 | if (leadershipChangeListeners.remove(listener) && leadershipChangeListeners.isEmpty()) { |
| 131 | return submit(new Unlisten()).thenApply(v -> null); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 132 | } |
| 133 | return CompletableFuture.completedFuture(null); |
| 134 | } |
| 135 | } |