| /* |
| * Copyright 2017-present Open Networking Laboratory |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.onosproject.store.primitives.impl; |
| |
| import java.util.Map; |
| import java.util.concurrent.CompletableFuture; |
| import java.util.concurrent.Executor; |
| |
| import com.google.common.collect.Maps; |
| import org.onosproject.store.service.AsyncAtomicValue; |
| import org.onosproject.store.service.AtomicValueEventListener; |
| |
| /** |
| * {@link AsyncAtomicValue} that executes asynchronous callbacks on a user provided |
| * {@link Executor}. |
| */ |
| public class ExecutingAsyncAtomicValue<V> extends ExecutingDistributedPrimitive implements AsyncAtomicValue<V> { |
| private final AsyncAtomicValue<V> delegateValue; |
| private final Executor orderedExecutor; |
| private final Map<AtomicValueEventListener<V>, AtomicValueEventListener<V>> listenerMap = Maps.newConcurrentMap(); |
| |
| public ExecutingAsyncAtomicValue( |
| AsyncAtomicValue<V> delegateValue, Executor orderedExecutor, Executor threadPoolExecutor) { |
| super(delegateValue, orderedExecutor, threadPoolExecutor); |
| this.delegateValue = delegateValue; |
| this.orderedExecutor = orderedExecutor; |
| } |
| |
| @Override |
| public CompletableFuture<Boolean> compareAndSet(V expect, V update) { |
| return asyncFuture(delegateValue.compareAndSet(expect, update)); |
| } |
| |
| @Override |
| public CompletableFuture<V> get() { |
| return asyncFuture(delegateValue.get()); |
| } |
| |
| @Override |
| public CompletableFuture<V> getAndSet(V value) { |
| return asyncFuture(delegateValue.getAndSet(value)); |
| } |
| |
| @Override |
| public CompletableFuture<Void> set(V value) { |
| return asyncFuture(delegateValue.set(value)); |
| } |
| |
| @Override |
| public CompletableFuture<Void> addListener(AtomicValueEventListener<V> listener) { |
| AtomicValueEventListener<V> wrappedListener = e -> orderedExecutor.execute(() -> listener.event(e)); |
| listenerMap.put(listener, wrappedListener); |
| return asyncFuture(delegateValue.addListener(wrappedListener)); |
| } |
| |
| @Override |
| public CompletableFuture<Void> removeListener(AtomicValueEventListener<V> listener) { |
| AtomicValueEventListener<V> wrappedListener = listenerMap.remove(listener); |
| if (wrappedListener != null) { |
| return asyncFuture(delegateValue.removeListener(wrappedListener)); |
| } |
| return CompletableFuture.completedFuture(null); |
| } |
| } |