| /* |
| * Copyright 2016 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.Map; |
| import java.util.concurrent.CompletableFuture; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.TimeoutException; |
| import java.util.function.Consumer; |
| |
| import org.onosproject.cluster.Leadership; |
| import org.onosproject.cluster.NodeId; |
| import org.onosproject.event.Change; |
| import org.onosproject.store.service.AsyncLeaderElector; |
| import org.onosproject.store.service.LeaderElector; |
| import org.onosproject.store.service.StorageException; |
| import org.onosproject.store.service.Synchronous; |
| |
| /** |
| * Default implementation for a {@code LeaderElector} backed by a {@link AsyncLeaderElector}. |
| */ |
| public class DefaultLeaderElector extends Synchronous<AsyncLeaderElector> implements LeaderElector { |
| |
| private final AsyncLeaderElector asyncElector; |
| private final long operationTimeoutMillis; |
| |
| public DefaultLeaderElector(AsyncLeaderElector asyncElector, long operationTimeoutMillis) { |
| super(asyncElector); |
| this.asyncElector = asyncElector; |
| this.operationTimeoutMillis = operationTimeoutMillis; |
| } |
| |
| @Override |
| public Leadership run(String topic, NodeId nodeId) { |
| return complete(asyncElector.run(topic, nodeId)); |
| } |
| |
| @Override |
| public void withdraw(String topic) { |
| complete(asyncElector.withdraw(topic)); |
| } |
| |
| @Override |
| public boolean anoint(String topic, NodeId nodeId) { |
| return complete(asyncElector.anoint(topic, nodeId)); |
| } |
| |
| @Override |
| public boolean promote(String topic, NodeId nodeId) { |
| return complete(asyncElector.promote(topic, nodeId)); |
| } |
| |
| @Override |
| public void evict(NodeId nodeId) { |
| complete(asyncElector.evict(nodeId)); |
| } |
| |
| @Override |
| public Leadership getLeadership(String topic) { |
| return complete(asyncElector.getLeadership(topic)); |
| } |
| |
| @Override |
| public Map<String, Leadership> getLeaderships() { |
| return complete(asyncElector.getLeaderships()); |
| } |
| |
| @Override |
| public void addChangeListener(Consumer<Change<Leadership>> consumer) { |
| complete(asyncElector.addChangeListener(consumer)); |
| } |
| |
| @Override |
| public void removeChangeListener(Consumer<Change<Leadership>> consumer) { |
| complete(asyncElector.removeChangeListener(consumer)); |
| } |
| |
| 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()); |
| } |
| } |
| } |