| /* |
| * 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 java.util.function.Consumer; |
| |
| import com.google.common.collect.Maps; |
| import org.onosproject.cluster.Leadership; |
| import org.onosproject.cluster.NodeId; |
| import org.onosproject.event.Change; |
| import org.onosproject.store.service.AsyncLeaderElector; |
| |
| /** |
| * {@link AsyncLeaderElector} that executes asynchronous callbacks on a user provided |
| * {@link Executor}. |
| */ |
| public class ExecutingAsyncLeaderElector extends ExecutingDistributedPrimitive implements AsyncLeaderElector { |
| private final AsyncLeaderElector delegateElector; |
| private final Executor orderedExecutor; |
| private final Map<Consumer<Change<Leadership>>, Consumer<Change<Leadership>>> listenerMap = Maps.newConcurrentMap(); |
| |
| public ExecutingAsyncLeaderElector( |
| AsyncLeaderElector delegateElector, Executor orderedExecutor, Executor threadPoolExecutor) { |
| super(delegateElector, orderedExecutor, threadPoolExecutor); |
| this.delegateElector = delegateElector; |
| this.orderedExecutor = orderedExecutor; |
| } |
| |
| @Override |
| public CompletableFuture<Leadership> run(String topic, NodeId nodeId) { |
| return asyncFuture(delegateElector.run(topic, nodeId)); |
| } |
| |
| @Override |
| public CompletableFuture<Void> withdraw(String topic) { |
| return asyncFuture(delegateElector.withdraw(topic)); |
| } |
| |
| @Override |
| public CompletableFuture<Boolean> anoint(String topic, NodeId nodeId) { |
| return asyncFuture(delegateElector.anoint(topic, nodeId)); |
| } |
| |
| @Override |
| public CompletableFuture<Void> evict(NodeId nodeId) { |
| return asyncFuture(delegateElector.evict(nodeId)); |
| } |
| |
| @Override |
| public CompletableFuture<Boolean> promote(String topic, NodeId nodeId) { |
| return asyncFuture(delegateElector.promote(topic, nodeId)); |
| } |
| |
| @Override |
| public CompletableFuture<Leadership> getLeadership(String topic) { |
| return asyncFuture(delegateElector.getLeadership(topic)); |
| } |
| |
| @Override |
| public CompletableFuture<Map<String, Leadership>> getLeaderships() { |
| return asyncFuture(delegateElector.getLeaderships()); |
| } |
| |
| @Override |
| public CompletableFuture<Void> addChangeListener(Consumer<Change<Leadership>> listener) { |
| Consumer<Change<Leadership>> wrappedListener = e -> orderedExecutor.execute(() -> listener.accept(e)); |
| listenerMap.put(listener, wrappedListener); |
| return asyncFuture(delegateElector.addChangeListener(wrappedListener)); |
| } |
| |
| @Override |
| public CompletableFuture<Void> removeChangeListener(Consumer<Change<Leadership>> listener) { |
| Consumer<Change<Leadership>> wrappedListener = listenerMap.remove(listener); |
| if (wrappedListener != null) { |
| return asyncFuture(delegateElector.removeChangeListener(wrappedListener)); |
| } |
| return CompletableFuture.completedFuture(null); |
| } |
| } |