io.servicecomb.transport.highway.HighwayServerConnection Maven / Gradle / Ivy

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/*
 * Copyright 2017 Huawei Technologies Co., Ltd
 *
 * 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 io.servicecomb.transport.highway;

import javax.ws.rs.core.Response.Status;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import io.protostuff.runtime.ProtobufFeature;
import io.servicecomb.foundation.vertx.server.TcpBufferHandler;
import io.servicecomb.foundation.vertx.server.TcpParser;
import io.servicecomb.foundation.vertx.server.TcpServerConnection;
import io.servicecomb.transport.highway.message.LoginRequest;
import io.servicecomb.transport.highway.message.LoginResponse;
import io.servicecomb.transport.highway.message.RequestHeader;
import io.servicecomb.transport.highway.message.ResponseHeader;
import io.vertx.core.buffer.Buffer;
import io.vertx.core.net.NetSocket;

public class HighwayServerConnection extends TcpServerConnection implements TcpBufferHandler {
  private static final Logger LOGGER = LoggerFactory.getLogger(HighwayServerConnection.class);

  private ProtobufFeature protobufFeature = new ProtobufFeature();

  @Override
  public void init(NetSocket netSocket) {
    splitter = new TcpParser(this);
    super.init(netSocket);
  }

  @Override
  public void handle(long msgId, Buffer headerBuffer, Buffer bodyBuffer) {
    RequestHeader requestHeader = decodeRequestHeader(msgId, headerBuffer);
    if (requestHeader == null) {
      return;
    }

    switch (requestHeader.getMsgType()) {
      case MsgType.REQUEST:
        onRequest(msgId, requestHeader, bodyBuffer);
        break;
      case MsgType.LOGIN:
        onLogin(msgId, requestHeader, bodyBuffer);
        break;

      default:
        throw new Error("Unknown tcp msgType " + requestHeader.getMsgType());
    }
  }

  protected RequestHeader decodeRequestHeader(long msgId, Buffer headerBuffer) {
    RequestHeader requestHeader = null;
    try {
      requestHeader = HighwayCodec.readRequestHeader(headerBuffer, protobufFeature);
    } catch (Exception e) {
      String msg = String.format("decode request header error, msgId=%d",
          msgId);
      LOGGER.error(msg, e);

      netSocket.close();
      return null;
    }

    return requestHeader;
  }

  protected void onLogin(long msgId, RequestHeader header, Buffer bodyBuffer) {
    LoginRequest request = null;
    try {
      request = LoginRequest.readObject(bodyBuffer);
    } catch (Exception e) {
      String msg = String.format("decode setParameter error, msgId=%d",
          msgId);
      LOGGER.error(msg, e);
      netSocket.close();
      return;
    }

    if (request != null) {
      this.setProtocol(request.getProtocol());
      this.setZipName(request.getZipName());
      this.protobufFeature.setUseProtobufMapCodec(request.isUseProtobufMapCodec());
    }

    try (HighwayOutputStream os = new HighwayOutputStream(msgId, protobufFeature)) {
      ResponseHeader responseHeader = new ResponseHeader();
      responseHeader.setStatusCode(Status.OK.getStatusCode());

      LoginResponse response = new LoginResponse();
      response.setUseProtobufMapCodec(protobufFeature.isUseProtobufMapCodec());

      os.write(ResponseHeader.getResponseHeaderSchema(),
          responseHeader,
          LoginResponse.getLoginResponseSchema(),
          response);
      netSocket.write(os.getBuffer());
    } catch (Exception e) {
      throw new Error("impossible.", e);
    }
  }

  protected void onRequest(long msgId, RequestHeader header, Buffer bodyBuffer) {
    HighwayServerInvoke invoke = new HighwayServerInvoke(protobufFeature);
    if (invoke.init(this, msgId, header, bodyBuffer)) {
      invoke.execute();
    }
  }
}