Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 1 | /* |
Brian O'Connor | a09fe5b | 2017-08-03 21:12:30 -0700 | [diff] [blame] | 2 | * Copyright 2016-present Open Networking Foundation |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 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 | |
Madan Jampani | 0c0cdc6 | 2016-02-22 16:54:06 -0800 | [diff] [blame] | 18 | import java.util.List; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 19 | import java.util.Map; |
| 20 | import java.util.Set; |
| 21 | import java.util.concurrent.CompletableFuture; |
| 22 | import java.util.function.Consumer; |
| 23 | |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 24 | import com.google.common.collect.Sets; |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 25 | import io.atomix.protocols.raft.proxy.RaftProxy; |
| 26 | import org.onlab.util.KryoNamespace; |
| 27 | import org.onosproject.cluster.Leadership; |
| 28 | import org.onosproject.cluster.NodeId; |
| 29 | import org.onosproject.event.Change; |
| 30 | import org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorOperations.Anoint; |
| 31 | import org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorOperations.GetElectedTopics; |
| 32 | import org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorOperations.GetLeadership; |
| 33 | import org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorOperations.Promote; |
| 34 | import org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorOperations.Run; |
| 35 | import org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorOperations.Withdraw; |
| 36 | import org.onosproject.store.serializers.KryoNamespaces; |
| 37 | import org.onosproject.store.service.AsyncLeaderElector; |
| 38 | import org.onosproject.store.service.Serializer; |
| 39 | |
| 40 | import static org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorEvents.CHANGE; |
| 41 | import static org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorOperations.ADD_LISTENER; |
| 42 | import static org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorOperations.ANOINT; |
| 43 | import static org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorOperations.EVICT; |
| 44 | import static org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorOperations.GET_ALL_LEADERSHIPS; |
| 45 | import static org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorOperations.GET_ELECTED_TOPICS; |
| 46 | import static org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorOperations.GET_LEADERSHIP; |
| 47 | import static org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorOperations.PROMOTE; |
| 48 | import static org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorOperations.REMOVE_LISTENER; |
| 49 | import static org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorOperations.RUN; |
| 50 | import static org.onosproject.store.primitives.resources.impl.AtomixLeaderElectorOperations.WITHDRAW; |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 51 | |
| 52 | /** |
| 53 | * Distributed resource providing the {@link AsyncLeaderElector} primitive. |
| 54 | */ |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 55 | public class AtomixLeaderElector extends AbstractRaftPrimitive implements AsyncLeaderElector { |
| 56 | private static final Serializer SERIALIZER = Serializer.using(KryoNamespace.newBuilder() |
| 57 | .register(KryoNamespaces.API) |
| 58 | .register(AtomixLeaderElectorOperations.NAMESPACE) |
| 59 | .register(AtomixLeaderElectorEvents.NAMESPACE) |
| 60 | .build()); |
| 61 | |
| 62 | private final Set<Consumer<Change<Leadership>>> leadershipChangeListeners = Sets.newCopyOnWriteArraySet(); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 63 | |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 64 | public AtomixLeaderElector(RaftProxy proxy) { |
| 65 | super(proxy); |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 66 | proxy.addStateChangeListener(state -> { |
| 67 | if (state == RaftProxy.State.CONNECTED && isListening()) { |
| 68 | proxy.invoke(ADD_LISTENER); |
| 69 | } |
| 70 | }); |
| 71 | proxy.addEventListener(CHANGE, SERIALIZER::decode, this::handleEvent); |
Madan Jampani | 630e7ac | 2016-05-31 11:34:05 -0700 | [diff] [blame] | 72 | } |
| 73 | |
Madan Jampani | 0c0cdc6 | 2016-02-22 16:54:06 -0800 | [diff] [blame] | 74 | private void handleEvent(List<Change<Leadership>> changes) { |
| 75 | changes.forEach(change -> leadershipChangeListeners.forEach(l -> l.accept(change))); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 76 | } |
| 77 | |
| 78 | @Override |
| 79 | public CompletableFuture<Leadership> run(String topic, NodeId nodeId) { |
Jordan Halterman | 46c5eaa | 2018-01-24 16:46:55 -0800 | [diff] [blame] | 80 | return proxy.<Run, Leadership>invoke(RUN, SERIALIZER::encode, new Run(topic, nodeId), SERIALIZER::decode); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 81 | } |
| 82 | |
| 83 | @Override |
| 84 | public CompletableFuture<Void> withdraw(String topic) { |
Jordan Halterman | 46c5eaa | 2018-01-24 16:46:55 -0800 | [diff] [blame] | 85 | return proxy.invoke(WITHDRAW, SERIALIZER::encode, new Withdraw(topic)); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 86 | } |
| 87 | |
| 88 | @Override |
| 89 | public CompletableFuture<Boolean> anoint(String topic, NodeId nodeId) { |
Jordan Halterman | 46c5eaa | 2018-01-24 16:46:55 -0800 | [diff] [blame] | 90 | return proxy.<Anoint, Boolean>invoke(ANOINT, SERIALIZER::encode, new Anoint(topic, nodeId), SERIALIZER::decode); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 91 | } |
| 92 | |
| 93 | @Override |
Madan Jampani | 0c0cdc6 | 2016-02-22 16:54:06 -0800 | [diff] [blame] | 94 | public CompletableFuture<Boolean> promote(String topic, NodeId nodeId) { |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 95 | return proxy.<Promote, Boolean>invoke( |
Jordan Halterman | 46c5eaa | 2018-01-24 16:46:55 -0800 | [diff] [blame] | 96 | PROMOTE, SERIALIZER::encode, new Promote(topic, nodeId), SERIALIZER::decode); |
Madan Jampani | 0c0cdc6 | 2016-02-22 16:54:06 -0800 | [diff] [blame] | 97 | } |
| 98 | |
| 99 | @Override |
| 100 | public CompletableFuture<Void> evict(NodeId nodeId) { |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 101 | return proxy.invoke(EVICT, SERIALIZER::encode, new AtomixLeaderElectorOperations.Evict(nodeId)); |
Madan Jampani | 0c0cdc6 | 2016-02-22 16:54:06 -0800 | [diff] [blame] | 102 | } |
| 103 | |
| 104 | @Override |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 105 | public CompletableFuture<Leadership> getLeadership(String topic) { |
Jordan Halterman | 46c5eaa | 2018-01-24 16:46:55 -0800 | [diff] [blame] | 106 | return proxy.invoke(GET_LEADERSHIP, SERIALIZER::encode, new GetLeadership(topic), SERIALIZER::decode); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 107 | } |
| 108 | |
| 109 | @Override |
| 110 | public CompletableFuture<Map<String, Leadership>> getLeaderships() { |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 111 | return proxy.invoke(GET_ALL_LEADERSHIPS, SERIALIZER::decode); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 112 | } |
| 113 | |
| 114 | public CompletableFuture<Set<String>> getElectedTopics(NodeId nodeId) { |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 115 | return proxy.invoke(GET_ELECTED_TOPICS, SERIALIZER::encode, new GetElectedTopics(nodeId), SERIALIZER::decode); |
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()) { |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 121 | return proxy.invoke(ADD_LISTENER).thenRun(() -> leadershipChangeListeners.add(consumer)); |
Madan Jampani | 27a2a3d | 2016-03-03 08:46:24 -0800 | [diff] [blame] | 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) { |
Madan Jampani | 68b1f5a | 2016-04-05 19:17:58 -0700 | [diff] [blame] | 130 | if (leadershipChangeListeners.remove(consumer) && leadershipChangeListeners.isEmpty()) { |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 131 | return proxy.invoke(REMOVE_LISTENER).thenApply(v -> null); |
Madan Jampani | 5e5b3d6 | 2016-02-01 16:03:33 -0800 | [diff] [blame] | 132 | } |
| 133 | return CompletableFuture.completedFuture(null); |
| 134 | } |
Madan Jampani | d7ff34d | 2016-05-26 18:20:55 -0700 | [diff] [blame] | 135 | |
Madan Jampani | fb78638 | 2016-06-13 10:25:35 -0700 | [diff] [blame] | 136 | private boolean isListening() { |
| 137 | return !leadershipChangeListeners.isEmpty(); |
| 138 | } |
Jordan Halterman | 2bf177c | 2017-06-29 01:49:08 -0700 | [diff] [blame] | 139 | } |