Jordan Halterman | 544d1d5 | 2017-04-19 23:45:12 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2017-present 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.impl; |
| 17 | |
| 18 | import java.util.Map; |
| 19 | import java.util.concurrent.CompletableFuture; |
| 20 | import java.util.concurrent.Executor; |
| 21 | |
| 22 | import com.google.common.collect.Maps; |
| 23 | import org.onlab.util.Tools; |
| 24 | import org.onosproject.store.service.AsyncAtomicValue; |
| 25 | import org.onosproject.store.service.AtomicValueEventListener; |
| 26 | |
| 27 | /** |
| 28 | * {@link AsyncAtomicValue} that executes asynchronous callbacks on a user provided |
| 29 | * {@link Executor}. |
| 30 | */ |
| 31 | public class ExecutingAsyncAtomicValue<V> extends ExecutingDistributedPrimitive implements AsyncAtomicValue<V> { |
| 32 | private final AsyncAtomicValue<V> delegateValue; |
| 33 | private final Executor executor; |
| 34 | private final Map<AtomicValueEventListener<V>, AtomicValueEventListener<V>> listenerMap = Maps.newConcurrentMap(); |
| 35 | |
| 36 | public ExecutingAsyncAtomicValue(AsyncAtomicValue<V> delegateValue, Executor executor) { |
| 37 | super(delegateValue, executor); |
| 38 | this.delegateValue = delegateValue; |
| 39 | this.executor = executor; |
| 40 | } |
| 41 | |
| 42 | @Override |
| 43 | public CompletableFuture<Boolean> compareAndSet(V expect, V update) { |
| 44 | return Tools.asyncFuture(delegateValue.compareAndSet(expect, update), executor); |
| 45 | } |
| 46 | |
| 47 | @Override |
| 48 | public CompletableFuture<V> get() { |
| 49 | return Tools.asyncFuture(delegateValue.get(), executor); |
| 50 | } |
| 51 | |
| 52 | @Override |
| 53 | public CompletableFuture<V> getAndSet(V value) { |
| 54 | return Tools.asyncFuture(delegateValue.getAndSet(value), executor); |
| 55 | } |
| 56 | |
| 57 | @Override |
| 58 | public CompletableFuture<Void> set(V value) { |
| 59 | return Tools.asyncFuture(delegateValue.set(value), executor); |
| 60 | } |
| 61 | |
| 62 | @Override |
| 63 | public CompletableFuture<Void> addListener(AtomicValueEventListener<V> listener) { |
| 64 | AtomicValueEventListener<V> wrappedListener = e -> executor.execute(() -> listener.event(e)); |
| 65 | listenerMap.put(listener, wrappedListener); |
| 66 | return Tools.asyncFuture(delegateValue.addListener(wrappedListener), executor); |
| 67 | } |
| 68 | |
| 69 | @Override |
| 70 | public CompletableFuture<Void> removeListener(AtomicValueEventListener<V> listener) { |
| 71 | AtomicValueEventListener<V> wrappedListener = listenerMap.remove(listener); |
| 72 | if (wrappedListener != null) { |
| 73 | return Tools.asyncFuture(delegateValue.removeListener(wrappedListener), executor); |
| 74 | } |
| 75 | return CompletableFuture.completedFuture(null); |
| 76 | } |
| 77 | } |