Madan Jampani | 13f6515 | 2016-08-17 13:14:53 -0700 | [diff] [blame] | 1 | /* |
Thomas Vachuska | b6d3167 | 2018-07-27 17:03:46 -0700 | [diff] [blame] | 2 | * Copyright 2018-present Open Networking Foundation |
Madan Jampani | 13f6515 | 2016-08-17 13:14:53 -0700 | [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 | */ |
Thomas Vachuska | b6d3167 | 2018-07-27 17:03:46 -0700 | [diff] [blame] | 16 | package org.onosproject.store.atomix.primitives.impl; |
Madan Jampani | 13f6515 | 2016-08-17 13:14:53 -0700 | [diff] [blame] | 17 | |
| 18 | import java.util.Map; |
| 19 | import java.util.concurrent.CompletableFuture; |
Madan Jampani | 03fb8b2 | 2016-08-22 09:08:42 -0700 | [diff] [blame] | 20 | import java.util.concurrent.Executor; |
Madan Jampani | 13f6515 | 2016-08-17 13:14:53 -0700 | [diff] [blame] | 21 | import java.util.function.Consumer; |
| 22 | |
Jordan Halterman | 00e92da | 2018-05-22 23:05:52 -0700 | [diff] [blame] | 23 | import com.google.common.collect.Maps; |
| 24 | import io.atomix.core.value.AsyncAtomicValue; |
| 25 | import io.atomix.core.value.AtomicValueEventListener; |
Madan Jampani | 13f6515 | 2016-08-17 13:14:53 -0700 | [diff] [blame] | 26 | import org.onosproject.store.service.DistributedPrimitive; |
| 27 | import org.onosproject.store.service.Topic; |
| 28 | |
Jordan Halterman | 6cf60c3 | 2018-08-15 01:22:51 -0700 | [diff] [blame^] | 29 | import static org.onosproject.store.atomix.primitives.impl.AtomixFutures.adaptFuture; |
| 30 | |
Madan Jampani | 13f6515 | 2016-08-17 13:14:53 -0700 | [diff] [blame] | 31 | /** |
| 32 | * Default implementation of {@link Topic}. |
| 33 | * |
| 34 | * @param <T> topic message type. |
| 35 | */ |
Jordan Halterman | 00e92da | 2018-05-22 23:05:52 -0700 | [diff] [blame] | 36 | public class AtomixDistributedTopic<T> implements Topic<T> { |
Madan Jampani | 13f6515 | 2016-08-17 13:14:53 -0700 | [diff] [blame] | 37 | |
Jordan Halterman | 00e92da | 2018-05-22 23:05:52 -0700 | [diff] [blame] | 38 | private final AsyncAtomicValue<T> atomixValue; |
Madan Jampani | 13f6515 | 2016-08-17 13:14:53 -0700 | [diff] [blame] | 39 | private final Map<Consumer<T>, AtomicValueEventListener<T>> callbacks = Maps.newIdentityHashMap(); |
| 40 | |
Jordan Halterman | 00e92da | 2018-05-22 23:05:52 -0700 | [diff] [blame] | 41 | AtomixDistributedTopic(AsyncAtomicValue<T> atomixValue) { |
| 42 | this.atomixValue = atomixValue; |
Madan Jampani | 13f6515 | 2016-08-17 13:14:53 -0700 | [diff] [blame] | 43 | } |
| 44 | |
| 45 | @Override |
| 46 | public String name() { |
Jordan Halterman | 00e92da | 2018-05-22 23:05:52 -0700 | [diff] [blame] | 47 | return atomixValue.name(); |
Madan Jampani | 13f6515 | 2016-08-17 13:14:53 -0700 | [diff] [blame] | 48 | } |
| 49 | |
| 50 | @Override |
| 51 | public Type primitiveType() { |
| 52 | return DistributedPrimitive.Type.TOPIC; |
| 53 | } |
| 54 | |
| 55 | @Override |
Madan Jampani | 13f6515 | 2016-08-17 13:14:53 -0700 | [diff] [blame] | 56 | public CompletableFuture<Void> publish(T message) { |
Jordan Halterman | 6cf60c3 | 2018-08-15 01:22:51 -0700 | [diff] [blame^] | 57 | return adaptFuture(atomixValue.set(message)); |
Madan Jampani | 13f6515 | 2016-08-17 13:14:53 -0700 | [diff] [blame] | 58 | } |
| 59 | |
| 60 | @Override |
Madan Jampani | 03fb8b2 | 2016-08-22 09:08:42 -0700 | [diff] [blame] | 61 | public CompletableFuture<Void> subscribe(Consumer<T> callback, Executor executor) { |
| 62 | AtomicValueEventListener<T> valueListener = |
| 63 | event -> executor.execute(() -> callback.accept(event.newValue())); |
Madan Jampani | 13f6515 | 2016-08-17 13:14:53 -0700 | [diff] [blame] | 64 | if (callbacks.putIfAbsent(callback, valueListener) == null) { |
Jordan Halterman | 6cf60c3 | 2018-08-15 01:22:51 -0700 | [diff] [blame^] | 65 | return adaptFuture(atomixValue.addListener(valueListener)); |
Madan Jampani | 13f6515 | 2016-08-17 13:14:53 -0700 | [diff] [blame] | 66 | } |
| 67 | return CompletableFuture.completedFuture(null); |
| 68 | } |
| 69 | |
| 70 | @Override |
| 71 | public CompletableFuture<Void> unsubscribe(Consumer<T> callback) { |
| 72 | AtomicValueEventListener<T> valueListener = callbacks.remove(callback); |
| 73 | if (valueListener != null) { |
Jordan Halterman | 6cf60c3 | 2018-08-15 01:22:51 -0700 | [diff] [blame^] | 74 | return adaptFuture(atomixValue.removeListener(valueListener)); |
Madan Jampani | 13f6515 | 2016-08-17 13:14:53 -0700 | [diff] [blame] | 75 | } |
| 76 | return CompletableFuture.completedFuture(null); |
| 77 | } |
Jordan Halterman | 00e92da | 2018-05-22 23:05:52 -0700 | [diff] [blame] | 78 | |
| 79 | @Override |
| 80 | public CompletableFuture<Void> destroy() { |
| 81 | return atomixValue.close(); |
| 82 | } |
Madan Jampani | 13f6515 | 2016-08-17 13:14:53 -0700 | [diff] [blame] | 83 | } |