text: /** @file
  
    Multiplexes request to other origins.
  
    @section license License
  
    Licensed to the Apache Software Foundation (ASF) under one
    or more contributor license agreements.  See the NOTICE file
    distributed with this work for additional information
    regarding copyright ownership.  The ASF licenses this file
    to you 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.
   */
  
  #pragma once
  
  #include <cassert>
  #include <memory>
  #include <string>
  #include <ts/ts.h>
  #include <vector>
  
  #include "ts.h"
  
  #define CHECK(X)                                         \
    {                                                      \
      const TSReturnCode r = static_cast<TSReturnCode>(X); \
      assert(r == TS_SUCCESS);                             \
    }
  
  struct Statistics {
    int failures;
    int hits;
    int time; // average
    int requests;
    int timeouts;
    int size; // average
  };
  
  typedef std::vector<std::string> Origins;
  
  struct Request {
    std::string host;
    int length;
    std::unique_ptr<ats::io::IO> io;
  
    Request(const std::string &, const TSMBuffer, const TSMLoc);
    Request(const Request &) = delete;
    Request(Request &&);
    Request &operator=(const Request &);
  };
  
  typedef std::vector<Request> Requests;
  
  struct Instance {
    Origins origins;
  };
  
  extern size_t timeout;
  
  void generateRequests(const Origins &, const TSMBuffer, const TSMLoc, Requests &);
  void addBody(Requests &, const TSIOBufferReader);
  void dispatch(Requests &, const int timeout = 0);
  