Madan Jampani | 39fff10 | 2016-02-14 13:17:28 -0800 | [diff] [blame] | 1 | /* |
Brian O'Connor | 5ab426f | 2016-04-09 01:19:45 -0700 | [diff] [blame] | 2 | * Copyright 2016-present Open Networking Laboratory |
Madan Jampani | 39fff10 | 2016-02-14 13:17:28 -0800 | [diff] [blame] | 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.onosproject.store.primitives; |
| 17 | |
Madan Jampani | d7ff34d | 2016-05-26 18:20:55 -0700 | [diff] [blame] | 18 | import java.util.Collection; |
Madan Jampani | 39fff10 | 2016-02-14 13:17:28 -0800 | [diff] [blame] | 19 | import java.util.Map; |
| 20 | import java.util.concurrent.CompletableFuture; |
| 21 | import java.util.concurrent.ExecutionException; |
| 22 | import java.util.concurrent.TimeUnit; |
| 23 | import java.util.concurrent.TimeoutException; |
| 24 | import java.util.function.Consumer; |
| 25 | |
| 26 | import org.onosproject.cluster.Leadership; |
| 27 | import org.onosproject.cluster.NodeId; |
| 28 | import org.onosproject.event.Change; |
| 29 | import org.onosproject.store.service.AsyncLeaderElector; |
| 30 | import org.onosproject.store.service.LeaderElector; |
| 31 | import org.onosproject.store.service.StorageException; |
| 32 | import org.onosproject.store.service.Synchronous; |
| 33 | |
| 34 | /** |
| 35 | * Default implementation for a {@code LeaderElector} backed by a {@link AsyncLeaderElector}. |
| 36 | */ |
| 37 | public class DefaultLeaderElector extends Synchronous<AsyncLeaderElector> implements LeaderElector { |
| 38 | |
| 39 | private final AsyncLeaderElector asyncElector; |
| 40 | private final long operationTimeoutMillis; |
| 41 | |
| 42 | public DefaultLeaderElector(AsyncLeaderElector asyncElector, long operationTimeoutMillis) { |
| 43 | super(asyncElector); |
| 44 | this.asyncElector = asyncElector; |
| 45 | this.operationTimeoutMillis = operationTimeoutMillis; |
| 46 | } |
| 47 | |
| 48 | @Override |
| 49 | public Leadership run(String topic, NodeId nodeId) { |
| 50 | return complete(asyncElector.run(topic, nodeId)); |
| 51 | } |
| 52 | |
| 53 | @Override |
| 54 | public void withdraw(String topic) { |
| 55 | complete(asyncElector.withdraw(topic)); |
| 56 | } |
| 57 | |
| 58 | @Override |
| 59 | public boolean anoint(String topic, NodeId nodeId) { |
| 60 | return complete(asyncElector.anoint(topic, nodeId)); |
| 61 | } |
| 62 | |
| 63 | @Override |
Madan Jampani | 0c0cdc6 | 2016-02-22 16:54:06 -0800 | [diff] [blame] | 64 | public boolean promote(String topic, NodeId nodeId) { |
| 65 | return complete(asyncElector.promote(topic, nodeId)); |
| 66 | } |
| 67 | |
| 68 | @Override |
| 69 | public void evict(NodeId nodeId) { |
| 70 | complete(asyncElector.evict(nodeId)); |
| 71 | } |
| 72 | |
| 73 | @Override |
Madan Jampani | 39fff10 | 2016-02-14 13:17:28 -0800 | [diff] [blame] | 74 | public Leadership getLeadership(String topic) { |
| 75 | return complete(asyncElector.getLeadership(topic)); |
| 76 | } |
| 77 | |
| 78 | @Override |
| 79 | public Map<String, Leadership> getLeaderships() { |
| 80 | return complete(asyncElector.getLeaderships()); |
| 81 | } |
| 82 | |
| 83 | @Override |
| 84 | public void addChangeListener(Consumer<Change<Leadership>> consumer) { |
| 85 | complete(asyncElector.addChangeListener(consumer)); |
| 86 | } |
| 87 | |
| 88 | @Override |
| 89 | public void removeChangeListener(Consumer<Change<Leadership>> consumer) { |
| 90 | complete(asyncElector.removeChangeListener(consumer)); |
| 91 | } |
| 92 | |
Madan Jampani | d7ff34d | 2016-05-26 18:20:55 -0700 | [diff] [blame] | 93 | @Override |
| 94 | public void addStatusChangeListener(Consumer<Status> listener) { |
| 95 | asyncElector.addStatusChangeListener(listener); |
| 96 | } |
| 97 | |
| 98 | @Override |
| 99 | public void removeStatusChangeListener(Consumer<Status> listener) { |
| 100 | asyncElector.removeStatusChangeListener(listener); |
| 101 | } |
| 102 | |
| 103 | @Override |
| 104 | public Collection<Consumer<Status>> statusChangeListeners() { |
| 105 | return asyncElector.statusChangeListeners(); |
| 106 | } |
| 107 | |
Madan Jampani | 39fff10 | 2016-02-14 13:17:28 -0800 | [diff] [blame] | 108 | private <T> T complete(CompletableFuture<T> future) { |
| 109 | try { |
| 110 | return future.get(operationTimeoutMillis, TimeUnit.MILLISECONDS); |
| 111 | } catch (InterruptedException e) { |
| 112 | Thread.currentThread().interrupt(); |
| 113 | throw new StorageException.Interrupted(); |
| 114 | } catch (TimeoutException e) { |
| 115 | throw new StorageException.Timeout(); |
| 116 | } catch (ExecutionException e) { |
| 117 | throw new StorageException(e.getCause()); |
| 118 | } |
| 119 | } |
| 120 | } |