| /* |
| * 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.impl; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| import java.util.Collection; |
| import java.util.Map; |
| import java.util.TreeMap; |
| import java.util.concurrent.CompletableFuture; |
| import java.util.function.Consumer; |
| |
| import org.onosproject.cluster.Leadership; |
| import org.onosproject.cluster.NodeId; |
| import org.onosproject.cluster.PartitionId; |
| import org.onosproject.event.Change; |
| import org.onosproject.store.service.AsyncLeaderElector; |
| import com.google.common.collect.Maps; |
| |
| /** |
| * {@link AsyncLeaderElector} that has its topics partitioned horizontally across |
| * several {@link AsyncLeaderElector leader electors}. |
| */ |
| public class PartitionedAsyncLeaderElector implements AsyncLeaderElector { |
| |
| private final String name; |
| private final TreeMap<PartitionId, AsyncLeaderElector> partitions = Maps.newTreeMap(); |
| private final Hasher<String> topicHasher; |
| |
| public PartitionedAsyncLeaderElector(String name, |
| Map<PartitionId, AsyncLeaderElector> partitions, |
| Hasher<String> topicHasher) { |
| this.name = name; |
| this.partitions.putAll(checkNotNull(partitions)); |
| this.topicHasher = checkNotNull(topicHasher); |
| } |
| |
| @Override |
| public String name() { |
| return name; |
| } |
| |
| @Override |
| public CompletableFuture<Leadership> run(String topic, NodeId nodeId) { |
| return getLeaderElector(topic).run(topic, nodeId); |
| } |
| |
| @Override |
| public CompletableFuture<Void> withdraw(String topic) { |
| return getLeaderElector(topic).withdraw(topic); |
| } |
| |
| @Override |
| public CompletableFuture<Boolean> anoint(String topic, NodeId nodeId) { |
| return getLeaderElector(topic).anoint(topic, nodeId); |
| } |
| |
| @Override |
| public CompletableFuture<Boolean> promote(String topic, NodeId nodeId) { |
| return getLeaderElector(topic).promote(topic, nodeId); |
| } |
| |
| @Override |
| public CompletableFuture<Void> evict(NodeId nodeId) { |
| return CompletableFuture.allOf(getLeaderElectors().stream() |
| .map(le -> le.evict(nodeId)) |
| .toArray(CompletableFuture[]::new)); |
| } |
| |
| @Override |
| public CompletableFuture<Leadership> getLeadership(String topic) { |
| return getLeaderElector(topic).getLeadership(topic); |
| } |
| |
| @Override |
| public CompletableFuture<Map<String, Leadership>> getLeaderships() { |
| Map<String, Leadership> leaderships = Maps.newConcurrentMap(); |
| return CompletableFuture.allOf(getLeaderElectors().stream() |
| .map(le -> le.getLeaderships() |
| .thenAccept(m -> leaderships.putAll(m))) |
| .toArray(CompletableFuture[]::new)) |
| .thenApply(v -> leaderships); |
| } |
| |
| @Override |
| public CompletableFuture<Void> addChangeListener(Consumer<Change<Leadership>> listener) { |
| return CompletableFuture.allOf(getLeaderElectors().stream() |
| .map(map -> map.addChangeListener(listener)) |
| .toArray(CompletableFuture[]::new)); |
| } |
| |
| @Override |
| public CompletableFuture<Void> removeChangeListener(Consumer<Change<Leadership>> listener) { |
| return CompletableFuture.allOf(getLeaderElectors().stream() |
| .map(map -> map.removeChangeListener(listener)) |
| .toArray(CompletableFuture[]::new)); |
| } |
| |
| /** |
| * Returns the leaderElector (partition) to which the specified topic maps. |
| * @param topic topic name |
| * @return AsyncLeaderElector to which topic maps |
| */ |
| private AsyncLeaderElector getLeaderElector(String topic) { |
| return partitions.get(topicHasher.hash(topic)); |
| } |
| |
| /** |
| * Returns all the constituent leader electors. |
| * @return collection of leader electors. |
| */ |
| private Collection<AsyncLeaderElector> getLeaderElectors() { |
| return partitions.values(); |
| } |
| |
| @Override |
| public void addStatusChangeListener(Consumer<Status> listener) { |
| partitions.values().forEach(elector -> elector.addStatusChangeListener(listener)); |
| } |
| |
| @Override |
| public void removeStatusChangeListener(Consumer<Status> listener) { |
| partitions.values().forEach(elector -> elector.removeStatusChangeListener(listener)); |
| } |
| |
| @Override |
| public Collection<Consumer<Status>> statusChangeListeners() { |
| throw new UnsupportedOperationException(); |
| } |
| } |