| /* |
| * Copyright 2016-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; |
| |
| import java.util.concurrent.CompletableFuture; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.TimeoutException; |
| |
| import org.onosproject.store.service.AsyncAtomicValue; |
| import org.onosproject.store.service.AtomicValue; |
| import org.onosproject.store.service.AtomicValueEventListener; |
| import org.onosproject.store.service.StorageException; |
| import org.onosproject.store.service.Synchronous; |
| |
| /** |
| * Default implementation for a {@code AtomicValue} backed by a {@link AsyncAtomicValue}. |
| * |
| * @param <V> value type |
| */ |
| public class DefaultAtomicValue<V> extends Synchronous<AsyncAtomicValue<V>> implements AtomicValue<V> { |
| |
| private final AsyncAtomicValue<V> asyncValue; |
| private final long operationTimeoutMillis; |
| |
| public DefaultAtomicValue(AsyncAtomicValue<V> asyncValue, long operationTimeoutMillis) { |
| super(asyncValue); |
| this.asyncValue = asyncValue; |
| this.operationTimeoutMillis = operationTimeoutMillis; |
| } |
| |
| @Override |
| public boolean compareAndSet(V expect, V update) { |
| return complete(asyncValue.compareAndSet(expect, update)); |
| } |
| |
| @Override |
| public V get() { |
| return complete(asyncValue.get()); |
| } |
| |
| @Override |
| public V getAndSet(V value) { |
| return complete(asyncValue.getAndSet(value)); |
| } |
| |
| @Override |
| public void set(V value) { |
| complete(asyncValue.set(value)); |
| } |
| |
| @Override |
| public void addListener(AtomicValueEventListener<V> listener) { |
| complete(asyncValue.addListener(listener)); |
| } |
| |
| @Override |
| public void removeListener(AtomicValueEventListener<V> listener) { |
| complete(asyncValue.removeListener(listener)); |
| } |
| |
| private <T> T complete(CompletableFuture<T> future) { |
| try { |
| return future.get(operationTimeoutMillis, TimeUnit.MILLISECONDS); |
| } catch (InterruptedException e) { |
| Thread.currentThread().interrupt(); |
| throw new StorageException.Interrupted(); |
| } catch (TimeoutException e) { |
| throw new StorageException.Timeout(); |
| } catch (ExecutionException e) { |
| throw new StorageException(e.getCause()); |
| } |
| } |
| } |