Package com.alibaba.otter.canal.protocol.CanalPacket

Examples of com.alibaba.otter.canal.protocol.CanalPacket.Packet

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                                                                                         Sub.newBuilder().setDestination(
                                                                                                                         clientIdentity.getDestination()).setClientId(
                                                                                                                                                                      String.valueOf(clientIdentity.getClientId())).setFilter(
                                                                                                                                                                                                                              filter != null ? filter : "").build().toByteString()).build().toByteArray());
            //
            Packet p = Packet.parseFrom(readNextPacket(channel));
            Ack ack = Ack.parseFrom(p.getBody());
            if (ack.getErrorCode() > 0) {
                throw new CanalClientException("failed to subscribe with reason: " + ack.getErrorMessage());
            }

            clientIdentity.setFilter(filter);
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                            Packet.newBuilder().setType(PacketType.UNSUBSCRIPTION).setBody(
                                                                                           Unsub.newBuilder().setDestination(
                                                                                                                             clientIdentity.getDestination()).setClientId(
                                                                                                                                                                          String.valueOf(clientIdentity.getClientId())).build().toByteString()).build().toByteArray());
            //
            Packet p = Packet.parseFrom(readNextPacket(channel));
            Ack ack = Ack.parseFrom(p.getBody());
            if (ack.getErrorCode() > 0) {
                throw new CanalClientException("failed to unSubscribe with reason: " + ack.getErrorMessage());
            }
        } catch (IOException e) {
            throw new CanalClientException(e);
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                                                                                Get.newBuilder().setDestination(
                                                                                                                clientIdentity.getDestination()).setClientId(
                                                                                                                                                             String.valueOf(clientIdentity.getClientId())).setFetchSize(
                                                                                                                                                                                                                        size).build().toByteString()).build().toByteArray());
            //
            Packet p = Packet.parseFrom(readNextPacket(channel));
            switch (p.getType()) {
                case MESSAGES: {
                    if (!p.getCompression().equals(Compression.NONE)) {
                        throw new CanalClientException("compression is not supported in this connector");
                    }

                    Messages messages = Messages.parseFrom(p.getBody());
                    Message result = new Message(messages.getBatchId());
                    for (ByteString byteString : messages.getMessagesList()) {
                        result.addEntry(Entry.parseFrom(byteString));
                    }
                    return result;
                }
                case ACK: {
                    Ack ack = Ack.parseFrom(p.getBody());
                    throw new CanalClientException("something goes wrong with reason: " + ack.getErrorMessage());
                }
                default: {
                    throw new CanalClientException("unexpected packet type: " + p.getType());
                }
            }
        } catch (IOException e) {
            throw new CanalClientException(e);
        }
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    }

    public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) throws Exception {
        logger.info("message receives in session handler...");
        ChannelBuffer buffer = (ChannelBuffer) e.getMessage();
        Packet packet = Packet.parseFrom(buffer.readBytes(buffer.readableBytes()).array());
        ClientIdentity clientIdentity = null;
        try {
            switch (packet.getType()) {
                case SUBSCRIPTION:
                    Sub sub = Sub.parseFrom(packet.getBody());
                    if (StringUtils.isNotEmpty(sub.getDestination()) && StringUtils.isNotEmpty(sub.getClientId())) {
                        clientIdentity = new ClientIdentity(sub.getDestination(), Short.valueOf(sub.getClientId()),
                                                            sub.getFilter());
                        MDC.put("destination", clientIdentity.getDestination());
                        embededServer.subscribe(clientIdentity);

                        // 尝试启动，如果已经启动，忽略
                        if (!embededServer.isStart(clientIdentity.getDestination())) {
                            ServerRunningMonitor runningMonitor = ServerRunningMonitors.getRunningMonitor(clientIdentity.getDestination());
                            if (!runningMonitor.isStart()) {
                                runningMonitor.start();
                            }
                        }

                        ctx.setAttachment(clientIdentity);// 设置状态数据
                        NettyUtils.ack(ctx.getChannel(), null);
                    } else {
                        NettyUtils.error(
                                         401,
                                         MessageFormatter.format("destination or clientId is null", sub.toString()).getMessage(),
                                         ctx.getChannel(), null);
                    }
                    break;
                case UNSUBSCRIPTION:
                    Unsub unsub = Unsub.parseFrom(packet.getBody());
                    if (StringUtils.isNotEmpty(unsub.getDestination()) && StringUtils.isNotEmpty(unsub.getClientId())) {
                        clientIdentity = new ClientIdentity(unsub.getDestination(), Short.valueOf(unsub.getClientId()),
                                                            unsub.getFilter());
                        MDC.put("destination", clientIdentity.getDestination());
                        embededServer.unsubscribe(clientIdentity);
                        stopCanalInstanceIfNecessary(clientIdentity);// 尝试关闭
                        NettyUtils.ack(ctx.getChannel(), null);
                    } else {
                        NettyUtils.error(401, MessageFormatter.format("destination or clientId is null",
                                                                      unsub.toString()).getMessage(), ctx.getChannel(),
                                         null);
                    }
                    break;
                case GET:
                    Get get = CanalPacket.Get.parseFrom(packet.getBody());
                    if (StringUtils.isNotEmpty(get.getDestination()) && StringUtils.isNotEmpty(get.getClientId())) {
                        clientIdentity = new ClientIdentity(get.getDestination(), Short.valueOf(get.getClientId()));
                        MDC.put("destination", clientIdentity.getDestination());
                        Message message = embededServer.getWithoutAck(clientIdentity, get.getFetchSize());

                        Packet.Builder packetBuilder = CanalPacket.Packet.newBuilder();
                        packetBuilder.setType(PacketType.MESSAGES);

                        Messages.Builder messageBuilder = CanalPacket.Messages.newBuilder();
                        messageBuilder.setBatchId(message.getId());
                        if (message.getId() != -1 && !CollectionUtils.isEmpty(message.getEntries())) {
                            for (Entry entry : message.getEntries()) {
                                messageBuilder.addMessages(entry.toByteString());
                            }
                        }
                        packetBuilder.setBody(messageBuilder.build().toByteString());
                        NettyUtils.write(ctx.getChannel(), packetBuilder.build().toByteArray(), null);// 输出数据
                    } else {
                        NettyUtils.error(
                                         401,
                                         MessageFormatter.format("destination or clientId is null", get.toString()).getMessage(),
                                         ctx.getChannel(), null);
                    }
                    break;
                case CLIENTACK:
                    ClientAck ack = CanalPacket.ClientAck.parseFrom(packet.getBody());
                    MDC.put("destination", ack.getDestination());
                    if (StringUtils.isNotEmpty(ack.getDestination()) && StringUtils.isNotEmpty(ack.getClientId())) {
                        if (ack.getBatchId() == 0L) {
                            NettyUtils.error(
                                             402,
                                             MessageFormatter.format("batchId should assign value", ack.toString()).getMessage(),
                                             ctx.getChannel(), null);
                        } else if (ack.getBatchId() == -1L) { // -1代表上一次get没有数据，直接忽略之
                            // donothing
                        } else {
                            clientIdentity = new ClientIdentity(ack.getDestination(), Short.valueOf(ack.getClientId()));
                            embededServer.ack(clientIdentity, ack.getBatchId());
                        }
                    } else {
                        NettyUtils.error(
                                         401,
                                         MessageFormatter.format("destination or clientId is null", ack.toString()).getMessage(),
                                         ctx.getChannel(), null);
                    }
                    break;
                case CLIENTROLLBACK:
                    ClientRollback rollback = CanalPacket.ClientRollback.parseFrom(packet.getBody());
                    MDC.put("destination", rollback.getDestination());
                    if (StringUtils.isNotEmpty(rollback.getDestination())
                        && StringUtils.isNotEmpty(rollback.getClientId())) {
                        clientIdentity = new ClientIdentity(rollback.getDestination(),
                                                            Short.valueOf(rollback.getClientId()));
                        if (rollback.getBatchId() == 0L) {
                            embededServer.rollback(clientIdentity);// 回滚所有批次
                        } else {
                            embededServer.rollback(clientIdentity, rollback.getBatchId()); // 只回滚单个批次
                        }
                    } else {
                        NettyUtils.error(401, MessageFormatter.format("destination or clientId is null",
                                                                      rollback.toString()).getMessage(),
                                         ctx.getChannel(), null);
                    }
                    break;
                default:
                    NettyUtils.error(
                                     400,
                                     MessageFormatter.format("packet type={} is NOT supported!", packet.getType()).getMessage(),
                                     ctx.getChannel(), null);
                    break;
            }
        } catch (Throwable exception) {
            NettyUtils.error(
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    private InetSocketAddress doConnect() throws CanalClientException {
        try {
            channel = SocketChannel.open();
            channel.socket().setSoTimeout(soTimeout);
            channel.connect(address);
            Packet p = Packet.parseFrom(readNextPacket(channel));
            if (p.getVersion() != 1) {
                throw new CanalClientException("unsupported version at this client.");
            }

            if (p.getType() != PacketType.HANDSHAKE) {
                throw new CanalClientException("expect handshake but found other type.");
            }
            //
            Handshake handshake = Handshake.parseFrom(p.getBody());
            supportedCompressions.addAll(handshake.getSupportedCompressionsList());
            //
            ClientAuth ca = ClientAuth.newBuilder().setUsername(username != null ? username : "").setNetReadTimeout(
                                                                                                                    10000).setNetWriteTimeout(
                                                                                                                                              10000).build();
            writeWithHeader(
                            channel,
                            Packet.newBuilder().setType(PacketType.CLIENTAUTHENTICATION).setBody(ca.toByteString()).build().toByteArray());
            //
            Packet ack = Packet.parseFrom(readNextPacket(channel));
            if (ack.getType() != PacketType.ACK) {
                throw new CanalClientException("unexpected packet type when ack is expected");
            }

            Ack ackBody = Ack.parseFrom(ack.getBody());
            if (ackBody.getErrorCode() > 0) {
                throw new CanalClientException("something goes wrong when doing authentication: "
                                               + ackBody.getErrorMessage());
            }
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                                                                                         Sub.newBuilder().setDestination(
                                                                                                                         clientIdentity.getDestination()).setClientId(
                                                                                                                                                                      String.valueOf(clientIdentity.getClientId())).setFilter(
                                                                                                                                                                                                                              filter != null ? filter : "").build().toByteString()).build().toByteArray());
            //
            Packet p = Packet.parseFrom(readNextPacket(channel));
            Ack ack = Ack.parseFrom(p.getBody());
            if (ack.getErrorCode() > 0) {
                throw new CanalClientException("failed to subscribe with reason: " + ack.getErrorMessage());
            }

            clientIdentity.setFilter(filter);
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                            Packet.newBuilder().setType(PacketType.UNSUBSCRIPTION).setBody(
                                                                                           Unsub.newBuilder().setDestination(
                                                                                                                             clientIdentity.getDestination()).setClientId(
                                                                                                                                                                          String.valueOf(clientIdentity.getClientId())).build().toByteString()).build().toByteArray());
            //
            Packet p = Packet.parseFrom(readNextPacket(channel));
            Ack ack = Ack.parseFrom(p.getBody());
            if (ack.getErrorCode() > 0) {
                throw new CanalClientException("failed to unSubscribe with reason: " + ack.getErrorMessage());
            }
        } catch (IOException e) {
            throw new CanalClientException(e);
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                                                                                Get.newBuilder().setDestination(
                                                                                                                clientIdentity.getDestination()).setClientId(
                                                                                                                                                             String.valueOf(clientIdentity.getClientId())).setFetchSize(
                                                                                                                                                                                                                        size).build().toByteString()).build().toByteArray());
            //
            Packet p = Packet.parseFrom(readNextPacket(channel));
            switch (p.getType()) {
                case MESSAGES: {
                    if (!p.getCompression().equals(Compression.NONE)) {
                        throw new CanalClientException("compression is not supported in this connector");
                    }

                    Messages messages = Messages.parseFrom(p.getBody());
                    Message result = new Message(messages.getBatchId());
                    for (ByteString byteString : messages.getMessagesList()) {
                        result.addEntry(Entry.parseFrom(byteString));
                    }
                    return result;
                }
                case ACK: {
                    Ack ack = Ack.parseFrom(p.getBody());
                    throw new CanalClientException("something goes wrong with reason: " + ack.getErrorMessage());
                }
                default: {
                    throw new CanalClientException("unexpected packet type: " + p.getType());
                }
            }
        } catch (IOException e) {
            throw new CanalClientException(e);
        }
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    private InetSocketAddress doConnect() throws CanalClientException {
        try {
            channel = SocketChannel.open();
            channel.socket().setSoTimeout(soTimeout);
            channel.connect(address);
            Packet p = Packet.parseFrom(readNextPacket(channel));
            if (p.getVersion() != 1) {
                throw new CanalClientException("unsupported version at this client.");
            }

            if (p.getType() != PacketType.HANDSHAKE) {
                throw new CanalClientException("expect handshake but found other type.");
            }
            //
            Handshake handshake = Handshake.parseFrom(p.getBody());
            supportedCompressions.addAll(handshake.getSupportedCompressionsList());
            //
            ClientAuth ca = ClientAuth.newBuilder().setUsername(username != null ? username : "").setNetReadTimeout(soTimeout).setNetWriteTimeout(soTimeout).build();
            writeWithHeader(channel,
                            Packet.newBuilder().setType(PacketType.CLIENTAUTHENTICATION).setBody(ca.toByteString()).build().toByteArray());
            //
            Packet ack = Packet.parseFrom(readNextPacket(channel));
            if (ack.getType() != PacketType.ACK) {
                throw new CanalClientException("unexpected packet type when ack is expected");
            }

            Ack ackBody = Ack.parseFrom(ack.getBody());
            if (ackBody.getErrorCode() > 0) {
                throw new CanalClientException("something goes wrong when doing authentication: "
                                               + ackBody.getErrorMessage());
            }
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        waitClientRunning();
        try {
            writeWithHeader(channel,
                            Packet.newBuilder().setType(PacketType.SUBSCRIPTION).setBody(Sub.newBuilder().setDestination(clientIdentity.getDestination()).setClientId(String.valueOf(clientIdentity.getClientId())).setFilter(filter != null ? filter : "").build().toByteString()).build().toByteArray());
            //
            Packet p = Packet.parseFrom(readNextPacket(channel));
            Ack ack = Ack.parseFrom(p.getBody());
            if (ack.getErrorCode() > 0) {
                throw new CanalClientException("failed to subscribe with reason: " + ack.getErrorMessage());
            }

            clientIdentity.setFilter(filter);
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Related Classes of com.alibaba.otter.canal.protocol.CanalPacket.Packet

  • com.alibaba.otter.canal.client.impl.SimpleCanalConnector
  • com.alibaba.otter.canal.server.CanalServerWithNettyTest
  • com.alibaba.otter.canal.server.netty.handler.ClientAuthenticationHandler
  • com.alibaba.otter.canal.server.netty.handler.SessionHandler
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