| /* |
| * Copyright 2018-present Open Networking Foundation |
| * |
| * 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.time.Duration; |
| import java.util.Optional; |
| 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.AsyncDistributedLock; |
| import org.onosproject.store.service.DistributedLock; |
| import org.onosproject.store.service.StorageException; |
| import org.onosproject.store.service.Synchronous; |
| import org.onosproject.store.service.Version; |
| |
| /** |
| * Default implementation for a {@code DistributedLock} backed by a {@link AsyncDistributedLock}. |
| */ |
| public class DefaultDistributedLock extends Synchronous<AsyncDistributedLock> implements DistributedLock { |
| |
| private final AsyncDistributedLock asyncLock; |
| private final long operationTimeoutMillis; |
| |
| public DefaultDistributedLock(AsyncDistributedLock asyncLock, long operationTimeoutMillis) { |
| super(asyncLock); |
| this.asyncLock = asyncLock; |
| this.operationTimeoutMillis = operationTimeoutMillis; |
| } |
| |
| @Override |
| public Version lock() { |
| return complete(asyncLock.lock()); |
| } |
| |
| @Override |
| public Optional<Version> tryLock() { |
| return complete(asyncLock.tryLock()); |
| } |
| |
| @Override |
| public Optional<Version> tryLock(Duration timeout) { |
| return complete(asyncLock.tryLock(timeout)); |
| } |
| |
| @Override |
| public void unlock() { |
| complete(asyncLock.unlock()); |
| } |
| |
| private <T> T complete(CompletableFuture<T> future) { |
| if (operationTimeoutMillis == -1) { |
| return future.join(); |
| } |
| 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()); |
| } |
| } |
| } |