Madan Jampani | 9b19a82 | 2014-11-04 21:37:13 -0800 | [diff] [blame] | 1 | package org.onlab.onos.store.service.impl; |
| 2 | |
Yuta HIGUCHI | 03e77e9 | 2014-11-22 17:53:01 -0800 | [diff] [blame^] | 3 | import static java.util.concurrent.Executors.newCachedThreadPool; |
| 4 | import static org.onlab.util.Tools.namedThreads; |
Madan Jampani | 9b19a82 | 2014-11-04 21:37:13 -0800 | [diff] [blame] | 5 | import static org.slf4j.LoggerFactory.getLogger; |
Yuta HIGUCHI | 03e77e9 | 2014-11-22 17:53:01 -0800 | [diff] [blame^] | 6 | import static org.onlab.onos.store.service.impl.ClusterMessagingProtocol.*; |
| 7 | import static org.onlab.onos.store.service.impl.ClusterMessagingProtocol.DB_SERIALIZER; |
Madan Jampani | 9b19a82 | 2014-11-04 21:37:13 -0800 | [diff] [blame] | 8 | |
| 9 | import java.util.concurrent.CompletableFuture; |
Yuta HIGUCHI | 03e77e9 | 2014-11-22 17:53:01 -0800 | [diff] [blame^] | 10 | import java.util.concurrent.ExecutorService; |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 11 | import java.util.function.BiConsumer; |
Madan Jampani | 9b19a82 | 2014-11-04 21:37:13 -0800 | [diff] [blame] | 12 | |
| 13 | import net.kuujo.copycat.protocol.PingRequest; |
| 14 | import net.kuujo.copycat.protocol.PollRequest; |
| 15 | import net.kuujo.copycat.protocol.RequestHandler; |
| 16 | import net.kuujo.copycat.protocol.SubmitRequest; |
| 17 | import net.kuujo.copycat.protocol.SyncRequest; |
| 18 | import net.kuujo.copycat.spi.protocol.ProtocolServer; |
| 19 | |
| 20 | import org.onlab.onos.store.cluster.messaging.ClusterCommunicationService; |
| 21 | import org.onlab.onos.store.cluster.messaging.ClusterMessage; |
| 22 | import org.onlab.onos.store.cluster.messaging.ClusterMessageHandler; |
| 23 | import org.slf4j.Logger; |
| 24 | |
| 25 | /** |
Madan Jampani | dfbfa18 | 2014-11-04 22:06:41 -0800 | [diff] [blame] | 26 | * ONOS Cluster messaging based Copycat protocol server. |
Madan Jampani | 9b19a82 | 2014-11-04 21:37:13 -0800 | [diff] [blame] | 27 | */ |
Madan Jampani | 9b19a82 | 2014-11-04 21:37:13 -0800 | [diff] [blame] | 28 | public class ClusterMessagingProtocolServer implements ProtocolServer { |
| 29 | |
| 30 | private final Logger log = getLogger(getClass()); |
Yuta HIGUCHI | 03e77e9 | 2014-11-22 17:53:01 -0800 | [diff] [blame^] | 31 | |
| 32 | private final ClusterCommunicationService clusterCommunicator; |
| 33 | |
Yuta HIGUCHI | 76b54bf | 2014-11-07 01:56:55 -0800 | [diff] [blame] | 34 | private volatile RequestHandler handler; |
Yuta HIGUCHI | 03e77e9 | 2014-11-22 17:53:01 -0800 | [diff] [blame^] | 35 | |
| 36 | private ExecutorService pool; |
Madan Jampani | 9b19a82 | 2014-11-04 21:37:13 -0800 | [diff] [blame] | 37 | |
| 38 | public ClusterMessagingProtocolServer(ClusterCommunicationService clusterCommunicator) { |
Yuta HIGUCHI | 76b54bf | 2014-11-07 01:56:55 -0800 | [diff] [blame] | 39 | this.clusterCommunicator = clusterCommunicator; |
Madan Jampani | 9b19a82 | 2014-11-04 21:37:13 -0800 | [diff] [blame] | 40 | } |
| 41 | |
| 42 | @Override |
| 43 | public void requestHandler(RequestHandler handler) { |
| 44 | this.handler = handler; |
| 45 | } |
| 46 | |
| 47 | @Override |
| 48 | public CompletableFuture<Void> listen() { |
Yuta HIGUCHI | 03e77e9 | 2014-11-22 17:53:01 -0800 | [diff] [blame^] | 49 | if (pool == null || pool.isShutdown()) { |
| 50 | pool = newCachedThreadPool(namedThreads("copycat-netty-messaging-server-%d")); |
| 51 | } |
| 52 | |
| 53 | clusterCommunicator.addSubscriber(COPYCAT_PING, new PingHandler()); |
| 54 | clusterCommunicator.addSubscriber(COPYCAT_SYNC, new SyncHandler()); |
| 55 | clusterCommunicator.addSubscriber(COPYCAT_POLL, new PollHandler()); |
| 56 | clusterCommunicator.addSubscriber(COPYCAT_SUBMIT, new SubmitHandler()); |
Madan Jampani | 9b19a82 | 2014-11-04 21:37:13 -0800 | [diff] [blame] | 57 | return CompletableFuture.completedFuture(null); |
| 58 | } |
| 59 | |
| 60 | @Override |
| 61 | public CompletableFuture<Void> close() { |
Yuta HIGUCHI | 03e77e9 | 2014-11-22 17:53:01 -0800 | [diff] [blame^] | 62 | clusterCommunicator.removeSubscriber(COPYCAT_PING); |
| 63 | clusterCommunicator.removeSubscriber(COPYCAT_SYNC); |
| 64 | clusterCommunicator.removeSubscriber(COPYCAT_POLL); |
| 65 | clusterCommunicator.removeSubscriber(COPYCAT_SUBMIT); |
| 66 | if (pool != null) { |
| 67 | pool.shutdownNow(); |
| 68 | pool = null; |
| 69 | } |
Madan Jampani | 9b19a82 | 2014-11-04 21:37:13 -0800 | [diff] [blame] | 70 | return CompletableFuture.completedFuture(null); |
| 71 | } |
| 72 | |
Yuta HIGUCHI | 03e77e9 | 2014-11-22 17:53:01 -0800 | [diff] [blame^] | 73 | private final class PingHandler extends CopycatMessageHandler<PingRequest> { |
| 74 | |
| 75 | @Override |
| 76 | public void raftHandle(PingRequest request, ClusterMessage message) { |
| 77 | pool.submit(new Runnable() { |
| 78 | |
| 79 | @Override |
| 80 | public void run() { |
| 81 | currentHandler().ping(request) |
| 82 | .whenComplete(new PostExecutionTask<>(message)); |
| 83 | } |
| 84 | }); |
| 85 | } |
| 86 | } |
| 87 | |
| 88 | private final class SyncHandler extends CopycatMessageHandler<SyncRequest> { |
| 89 | |
| 90 | @Override |
| 91 | public void raftHandle(SyncRequest request, ClusterMessage message) { |
| 92 | pool.submit(new Runnable() { |
| 93 | |
| 94 | @Override |
| 95 | public void run() { |
| 96 | currentHandler().sync(request) |
| 97 | .whenComplete(new PostExecutionTask<>(message)); |
| 98 | } |
| 99 | }); |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | private final class PollHandler extends CopycatMessageHandler<PollRequest> { |
| 104 | |
| 105 | @Override |
| 106 | public void raftHandle(PollRequest request, ClusterMessage message) { |
| 107 | pool.submit(new Runnable() { |
| 108 | |
| 109 | @Override |
| 110 | public void run() { |
| 111 | currentHandler().poll(request) |
| 112 | .whenComplete(new PostExecutionTask<>(message)); |
| 113 | } |
| 114 | }); |
| 115 | } |
| 116 | } |
| 117 | |
| 118 | private final class SubmitHandler extends CopycatMessageHandler<SubmitRequest> { |
| 119 | |
| 120 | @Override |
| 121 | public void raftHandle(SubmitRequest request, ClusterMessage message) { |
| 122 | pool.submit(new Runnable() { |
| 123 | |
| 124 | @Override |
| 125 | public void run() { |
| 126 | currentHandler().submit(request) |
| 127 | .whenComplete(new PostExecutionTask<>(message)); |
| 128 | } |
| 129 | }); |
| 130 | } |
| 131 | } |
| 132 | |
| 133 | private abstract class CopycatMessageHandler<T> implements ClusterMessageHandler { |
| 134 | |
| 135 | public abstract void raftHandle(T request, ClusterMessage message); |
Madan Jampani | 9b19a82 | 2014-11-04 21:37:13 -0800 | [diff] [blame] | 136 | |
| 137 | @Override |
| 138 | public void handle(ClusterMessage message) { |
Yuta HIGUCHI | 03e77e9 | 2014-11-22 17:53:01 -0800 | [diff] [blame^] | 139 | T request = DB_SERIALIZER.decode(message.payload()); |
| 140 | raftHandle(request, message); |
| 141 | } |
| 142 | |
| 143 | RequestHandler currentHandler() { |
| 144 | RequestHandler currentHandler = handler; |
| 145 | if (currentHandler == null) { |
Yuta HIGUCHI | 5fb6c96 | 2014-11-07 13:07:40 -0800 | [diff] [blame] | 146 | // there is a slight window of time during state transition, |
| 147 | // where handler becomes null |
Yuta HIGUCHI | 03e77e9 | 2014-11-22 17:53:01 -0800 | [diff] [blame^] | 148 | long sleepMs = 1; |
Yuta HIGUCHI | 5fb6c96 | 2014-11-07 13:07:40 -0800 | [diff] [blame] | 149 | for (int i = 0; i < 10; ++i) { |
Yuta HIGUCHI | 03e77e9 | 2014-11-22 17:53:01 -0800 | [diff] [blame^] | 150 | currentHandler = handler; |
| 151 | if (currentHandler != null) { |
Yuta HIGUCHI | 5fb6c96 | 2014-11-07 13:07:40 -0800 | [diff] [blame] | 152 | break; |
| 153 | } |
| 154 | try { |
Yuta HIGUCHI | 03e77e9 | 2014-11-22 17:53:01 -0800 | [diff] [blame^] | 155 | sleepMs <<= 1; |
| 156 | Thread.sleep(sleepMs); |
Yuta HIGUCHI | 5fb6c96 | 2014-11-07 13:07:40 -0800 | [diff] [blame] | 157 | } catch (InterruptedException e) { |
Yuta HIGUCHI | 03e77e9 | 2014-11-22 17:53:01 -0800 | [diff] [blame^] | 158 | log.error("Interrupted", e); |
| 159 | return handler; |
Yuta HIGUCHI | 5fb6c96 | 2014-11-07 13:07:40 -0800 | [diff] [blame] | 160 | } |
| 161 | } |
Yuta HIGUCHI | 03e77e9 | 2014-11-22 17:53:01 -0800 | [diff] [blame^] | 162 | if (currentHandler == null) { |
Yuta HIGUCHI | 2fe6334 | 2014-11-17 21:33:38 -0800 | [diff] [blame] | 163 | log.error("There was no handler registered!"); |
Yuta HIGUCHI | 03e77e9 | 2014-11-22 17:53:01 -0800 | [diff] [blame^] | 164 | return handler; |
Yuta HIGUCHI | 5fb6c96 | 2014-11-07 13:07:40 -0800 | [diff] [blame] | 165 | } |
| 166 | } |
Yuta HIGUCHI | 03e77e9 | 2014-11-22 17:53:01 -0800 | [diff] [blame^] | 167 | return currentHandler; |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 168 | } |
| 169 | |
Yuta HIGUCHI | 03e77e9 | 2014-11-22 17:53:01 -0800 | [diff] [blame^] | 170 | final class PostExecutionTask<R> implements BiConsumer<R, Throwable> { |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 171 | |
| 172 | private final ClusterMessage message; |
| 173 | |
| 174 | public PostExecutionTask(ClusterMessage message) { |
| 175 | this.message = message; |
| 176 | } |
| 177 | |
| 178 | @Override |
Yuta HIGUCHI | 03e77e9 | 2014-11-22 17:53:01 -0800 | [diff] [blame^] | 179 | public void accept(R response, Throwable error) { |
| 180 | if (error != null) { |
| 181 | log.error("Processing {} failed.", message.subject(), error); |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 182 | } else { |
Madan Jampani | 9b19a82 | 2014-11-04 21:37:13 -0800 | [diff] [blame] | 183 | try { |
Yuta HIGUCHI | 5fb6c96 | 2014-11-07 13:07:40 -0800 | [diff] [blame] | 184 | log.trace("responding to {}", message.subject()); |
Yuta HIGUCHI | 03e77e9 | 2014-11-22 17:53:01 -0800 | [diff] [blame^] | 185 | message.respond(DB_SERIALIZER.encode(response)); |
Madan Jampani | 9b19a82 | 2014-11-04 21:37:13 -0800 | [diff] [blame] | 186 | } catch (Exception e) { |
Yuta HIGUCHI | 03e77e9 | 2014-11-22 17:53:01 -0800 | [diff] [blame^] | 187 | log.error("Failed responding with {}", response.getClass().getName(), e); |
Madan Jampani | 9b19a82 | 2014-11-04 21:37:13 -0800 | [diff] [blame] | 188 | } |
Madan Jampani | 778f7ad | 2014-11-05 22:46:15 -0800 | [diff] [blame] | 189 | } |
Madan Jampani | 9b19a82 | 2014-11-04 21:37:13 -0800 | [diff] [blame] | 190 | } |
| 191 | } |
| 192 | } |
| 193 | } |