Madan Jampani | 39fff10 | 2016-02-14 13:17:28 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2016 Open Networking Laboratory |
| 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 | |
| 18 | import java.util.Map; |
| 19 | import java.util.concurrent.CompletableFuture; |
| 20 | import java.util.concurrent.ExecutionException; |
| 21 | import java.util.concurrent.TimeUnit; |
| 22 | import java.util.concurrent.TimeoutException; |
| 23 | import java.util.function.Consumer; |
| 24 | |
| 25 | import org.onosproject.cluster.Leadership; |
| 26 | import org.onosproject.cluster.NodeId; |
| 27 | import org.onosproject.event.Change; |
| 28 | import org.onosproject.store.service.AsyncLeaderElector; |
| 29 | import org.onosproject.store.service.LeaderElector; |
| 30 | import org.onosproject.store.service.StorageException; |
| 31 | import org.onosproject.store.service.Synchronous; |
| 32 | |
| 33 | /** |
| 34 | * Default implementation for a {@code LeaderElector} backed by a {@link AsyncLeaderElector}. |
| 35 | */ |
| 36 | public class DefaultLeaderElector extends Synchronous<AsyncLeaderElector> implements LeaderElector { |
| 37 | |
| 38 | private final AsyncLeaderElector asyncElector; |
| 39 | private final long operationTimeoutMillis; |
| 40 | |
| 41 | public DefaultLeaderElector(AsyncLeaderElector asyncElector, long operationTimeoutMillis) { |
| 42 | super(asyncElector); |
| 43 | this.asyncElector = asyncElector; |
| 44 | this.operationTimeoutMillis = operationTimeoutMillis; |
| 45 | } |
| 46 | |
| 47 | @Override |
| 48 | public Leadership run(String topic, NodeId nodeId) { |
| 49 | return complete(asyncElector.run(topic, nodeId)); |
| 50 | } |
| 51 | |
| 52 | @Override |
| 53 | public void withdraw(String topic) { |
| 54 | complete(asyncElector.withdraw(topic)); |
| 55 | } |
| 56 | |
| 57 | @Override |
| 58 | public boolean anoint(String topic, NodeId nodeId) { |
| 59 | return complete(asyncElector.anoint(topic, nodeId)); |
| 60 | } |
| 61 | |
| 62 | @Override |
Madan Jampani | 0c0cdc6 | 2016-02-22 16:54:06 -0800 | [diff] [blame] | 63 | public boolean promote(String topic, NodeId nodeId) { |
| 64 | return complete(asyncElector.promote(topic, nodeId)); |
| 65 | } |
| 66 | |
| 67 | @Override |
| 68 | public void evict(NodeId nodeId) { |
| 69 | complete(asyncElector.evict(nodeId)); |
| 70 | } |
| 71 | |
| 72 | @Override |
Madan Jampani | 39fff10 | 2016-02-14 13:17:28 -0800 | [diff] [blame] | 73 | public Leadership getLeadership(String topic) { |
| 74 | return complete(asyncElector.getLeadership(topic)); |
| 75 | } |
| 76 | |
| 77 | @Override |
| 78 | public Map<String, Leadership> getLeaderships() { |
| 79 | return complete(asyncElector.getLeaderships()); |
| 80 | } |
| 81 | |
| 82 | @Override |
| 83 | public void addChangeListener(Consumer<Change<Leadership>> consumer) { |
| 84 | complete(asyncElector.addChangeListener(consumer)); |
| 85 | } |
| 86 | |
| 87 | @Override |
| 88 | public void removeChangeListener(Consumer<Change<Leadership>> consumer) { |
| 89 | complete(asyncElector.removeChangeListener(consumer)); |
| 90 | } |
| 91 | |
| 92 | private <T> T complete(CompletableFuture<T> future) { |
| 93 | try { |
| 94 | return future.get(operationTimeoutMillis, TimeUnit.MILLISECONDS); |
| 95 | } catch (InterruptedException e) { |
| 96 | Thread.currentThread().interrupt(); |
| 97 | throw new StorageException.Interrupted(); |
| 98 | } catch (TimeoutException e) { |
| 99 | throw new StorageException.Timeout(); |
| 100 | } catch (ExecutionException e) { |
| 101 | throw new StorageException(e.getCause()); |
| 102 | } |
| 103 | } |
| 104 | } |