Madan Jampani | 619453b | 2015-07-22 23:47:09 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2015 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 | */ |
Madan Jampani | 27b69c6 | 2015-05-15 15:49:02 -0700 | [diff] [blame] | 16 | package org.onosproject.store.consistent.impl; |
| 17 | |
| 18 | import java.net.URI; |
| 19 | import java.nio.ByteBuffer; |
| 20 | import java.util.concurrent.CompletableFuture; |
| 21 | |
| 22 | import org.onlab.util.Tools; |
| 23 | import org.onosproject.cluster.ClusterService; |
| 24 | import org.onosproject.cluster.ControllerNode; |
| 25 | import org.onosproject.cluster.NodeId; |
| 26 | import org.onosproject.store.cluster.messaging.ClusterCommunicationService; |
| 27 | import org.onosproject.store.cluster.messaging.MessageSubject; |
| 28 | |
| 29 | import net.kuujo.copycat.protocol.AbstractProtocol; |
| 30 | import net.kuujo.copycat.protocol.ProtocolClient; |
| 31 | import net.kuujo.copycat.protocol.ProtocolHandler; |
| 32 | import net.kuujo.copycat.protocol.ProtocolServer; |
| 33 | import net.kuujo.copycat.util.Configurable; |
| 34 | |
| 35 | /** |
| 36 | * Protocol for Copycat communication that employs |
| 37 | * {@code ClusterCommunicationService}. |
| 38 | */ |
| 39 | public class CopycatCommunicationProtocol extends AbstractProtocol { |
| 40 | |
| 41 | private static final MessageSubject COPYCAT_MESSAGE_SUBJECT = |
| 42 | new MessageSubject("onos-copycat-message"); |
| 43 | |
| 44 | protected ClusterService clusterService; |
| 45 | protected ClusterCommunicationService clusterCommunicator; |
| 46 | |
| 47 | public CopycatCommunicationProtocol(ClusterService clusterService, |
| 48 | ClusterCommunicationService clusterCommunicator) { |
| 49 | this.clusterService = clusterService; |
| 50 | this.clusterCommunicator = clusterCommunicator; |
| 51 | } |
| 52 | |
| 53 | @Override |
| 54 | public Configurable copy() { |
| 55 | return this; |
| 56 | } |
| 57 | |
| 58 | @Override |
| 59 | public ProtocolClient createClient(URI uri) { |
| 60 | NodeId nodeId = uriToNodeId(uri); |
| 61 | if (nodeId == null) { |
| 62 | throw new IllegalStateException("Unknown peer " + uri); |
| 63 | } |
| 64 | return new Client(nodeId); |
| 65 | } |
| 66 | |
| 67 | @Override |
| 68 | public ProtocolServer createServer(URI uri) { |
| 69 | return new Server(); |
| 70 | } |
| 71 | |
| 72 | private class Server implements ProtocolServer { |
| 73 | |
| 74 | @Override |
| 75 | public void handler(ProtocolHandler handler) { |
| 76 | if (handler == null) { |
| 77 | clusterCommunicator.removeSubscriber(COPYCAT_MESSAGE_SUBJECT); |
| 78 | } else { |
| 79 | clusterCommunicator.addSubscriber(COPYCAT_MESSAGE_SUBJECT, |
| 80 | ByteBuffer::wrap, |
| 81 | handler, |
| 82 | Tools::byteBuffertoArray); |
| 83 | // FIXME: Tools::byteBuffertoArray involves a array copy. |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | @Override |
| 88 | public CompletableFuture<Void> listen() { |
| 89 | return CompletableFuture.completedFuture(null); |
| 90 | } |
| 91 | |
| 92 | @Override |
| 93 | public CompletableFuture<Void> close() { |
| 94 | clusterCommunicator.removeSubscriber(COPYCAT_MESSAGE_SUBJECT); |
| 95 | return CompletableFuture.completedFuture(null); |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | private class Client implements ProtocolClient { |
| 100 | private final NodeId peer; |
| 101 | |
| 102 | public Client(NodeId peer) { |
| 103 | this.peer = peer; |
| 104 | } |
| 105 | |
| 106 | @Override |
| 107 | public CompletableFuture<ByteBuffer> write(ByteBuffer request) { |
| 108 | return clusterCommunicator.sendAndReceive(request, |
| 109 | COPYCAT_MESSAGE_SUBJECT, |
| 110 | Tools::byteBuffertoArray, |
| 111 | ByteBuffer::wrap, |
| 112 | peer); |
| 113 | } |
| 114 | |
| 115 | @Override |
| 116 | public CompletableFuture<Void> connect() { |
| 117 | return CompletableFuture.completedFuture(null); |
| 118 | } |
| 119 | |
| 120 | @Override |
| 121 | public CompletableFuture<Void> close() { |
| 122 | return CompletableFuture.completedFuture(null); |
| 123 | } |
| 124 | } |
| 125 | |
| 126 | private NodeId uriToNodeId(URI uri) { |
| 127 | return clusterService.getNodes() |
| 128 | .stream() |
| 129 | .filter(node -> uri.getHost().equals(node.ip().toString())) |
| 130 | .map(ControllerNode::id) |
| 131 | .findAny() |
| 132 | .orElse(null); |
| 133 | } |
| 134 | } |