/* * 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.Collection; 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)); } @Override public void addStatusChangeListener(Consumer<Status> listener) { asyncElector.addStatusChangeListener(listener); } @Override public void removeStatusChangeListener(Consumer<Status> listener) { asyncElector.removeStatusChangeListener(listener); } @Override public Collection<Consumer<Status>> statusChangeListeners() { return asyncElector.statusChangeListeners(); } 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()); } } }