| /* |
| * 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 com.google.common.base.Throwables; |
| import com.google.common.collect.Sets; |
| import io.atomix.catalyst.concurrent.ThreadContext; |
| import io.atomix.catalyst.transport.Address; |
| import io.atomix.catalyst.transport.Client; |
| import io.atomix.catalyst.transport.Connection; |
| import io.atomix.catalyst.transport.TransportException; |
| import org.onosproject.cluster.PartitionId; |
| import org.onosproject.store.cluster.messaging.Endpoint; |
| import org.onosproject.store.cluster.messaging.MessagingException; |
| import org.onosproject.store.cluster.messaging.MessagingService; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.net.ConnectException; |
| import java.nio.ByteBuffer; |
| import java.util.Set; |
| import java.util.concurrent.CompletableFuture; |
| |
| import static com.google.common.base.MoreObjects.toStringHelper; |
| import static com.google.common.base.Preconditions.checkNotNull; |
| import static org.onosproject.store.primitives.impl.CopycatTransport.CONNECT; |
| import static org.onosproject.store.primitives.impl.CopycatTransport.SUCCESS; |
| |
| /** |
| * Copycat transport client implementation. |
| */ |
| public class CopycatTransportClient implements Client { |
| private final Logger log = LoggerFactory.getLogger(getClass()); |
| private final PartitionId partitionId; |
| private final String serverSubject; |
| private final MessagingService messagingService; |
| private final Set<CopycatTransportConnection> connections = Sets.newConcurrentHashSet(); |
| |
| public CopycatTransportClient(PartitionId partitionId, MessagingService messagingService) { |
| this.partitionId = checkNotNull(partitionId, "partitionId cannot be null"); |
| this.serverSubject = String.format("onos-copycat-%s", partitionId); |
| this.messagingService = checkNotNull(messagingService, "messagingService cannot be null"); |
| } |
| |
| @Override |
| public CompletableFuture<Connection> connect(Address address) { |
| CompletableFuture<Connection> future = new CompletableFuture<>(); |
| ThreadContext context = ThreadContext.currentContextOrThrow(); |
| Endpoint endpoint = CopycatTransport.toEndpoint(address); |
| |
| log.debug("Connecting to {}", address); |
| |
| ByteBuffer requestBuffer = ByteBuffer.allocate(1); |
| requestBuffer.put(CONNECT); |
| |
| // Send a connect request to the server to get a unique connection ID. |
| messagingService.sendAndReceive(endpoint, serverSubject, requestBuffer.array(), context.executor()) |
| .whenComplete((payload, error) -> { |
| Throwable wrappedError = error; |
| if (error != null) { |
| Throwable rootCause = Throwables.getRootCause(error); |
| if (MessagingException.class.isAssignableFrom(rootCause.getClass())) { |
| wrappedError = new TransportException(error); |
| } |
| // TODO ONOS-6788 we might consider demoting this warning during startup when there is |
| // a race between the server registering handlers and the client sending messages |
| log.warn("Connection to {} failed! Reason: {}", address, wrappedError); |
| future.completeExceptionally(wrappedError); |
| } else { |
| // If the connection is successful, the server will send back a |
| // connection ID indicating where to send messages for the connection. |
| ByteBuffer responseBuffer = ByteBuffer.wrap(payload); |
| if (responseBuffer.get() == SUCCESS) { |
| long connectionId = responseBuffer.getLong(); |
| CopycatTransportConnection connection = new CopycatTransportConnection( |
| connectionId, |
| CopycatTransportConnection.Mode.CLIENT, |
| partitionId, |
| endpoint, |
| messagingService, |
| context); |
| connection.onClose(connections::remove); |
| connections.add(connection); |
| future.complete(connection); |
| log.debug("Created connection {}-{} to {}", partitionId, connectionId, address); |
| } else { |
| log.warn("Connection to {} failed!"); |
| future.completeExceptionally(new ConnectException()); |
| } |
| } |
| }); |
| return future; |
| } |
| |
| @Override |
| public CompletableFuture<Void> close() { |
| return CompletableFuture.allOf(connections.stream().map(Connection::close).toArray(CompletableFuture[]::new)); |
| } |
| |
| @Override |
| public String toString() { |
| return toStringHelper(this) |
| .add("partitionId", partitionId) |
| .toString(); |
| } |
| } |
| |