C++ message_id::response_id方法代码示例

 inline void operator()(const actor_ptr& sender, const message_id& mid) const {
     CPPA_REQUIRE(rsn != exit_reason::not_exited);
     if (mid.is_request() && sender != nullptr) {
         sender->enqueue({nullptr, sender, mid.response_id()},
                         make_any_tuple(atom("EXITED"), rsn));
     }
 }

void sync_request_bouncer::operator()(const strong_actor_ptr& sender,
                                      const message_id& mid) const {
  if (sender && mid.is_request())
    sender->enqueue(nullptr, mid.response_id(),
                    make_message(make_error(sec::request_receiver_down)),
                    // TODO: this breaks out of the execution unit
                    nullptr);
}

void sync_request_bouncer::operator()(const actor_addr& sender,
                                      const message_id& mid) const {
    BOOST_ACTOR_REQUIRE(rsn != exit_reason::not_exited);
    if (sender && mid.is_request()) {
        auto ptr = detail::raw_access::get(sender);
        ptr->enqueue({invalid_actor_addr, ptr, mid.response_id()},
                     make_message(sync_exited_msg{sender, rsn}),
                     // TODO: this breaks out of the execution unit
                     nullptr);
    }
}

 void enqueue_impl(const actor_addr& sender, any_tuple msg, message_id id,
                   util::int_list<Is...>) {
     auto opt = m_map_args(std::move(msg));
     if (opt) {
         response_promise handle{this->address(), sender, id.response_id()};
         evnt_vec events;
         args_vec arguments;
         add_arguments_to_kernel<Ret>(events, arguments, m_result_size, 
                                      get_ref<Is>(*opt)...);
         auto cmd = make_counted<command<actor_facade, Ret>>(
             handle, this, 
             std::move(events), std::move(arguments),
             m_result_size, *opt
         );
         cmd->enqueue();
     } else {
         CPPA_LOGMF(CPPA_ERROR, "actor_facade::enqueue() tuple_cast failed.");
     }
 }

bool actor_pool::filter(upgrade_lock<detail::shared_spinlock>& guard,
                        const strong_actor_ptr& sender, message_id mid,
                        message_view& mv, execution_unit* eu) {
  auto& content = mv.content();
  CAF_LOG_TRACE(CAF_ARG(mid) << CAF_ARG(content));
  if (content.match_elements<exit_msg>()) {
    // acquire second mutex as well
    std::vector<actor> workers;
    auto em = content.get_as<exit_msg>(0).reason;
    if (cleanup(std::move(em), eu)) {
      auto tmp = mv.move_content_to_message();
      // send exit messages *always* to all workers and clear vector afterwards
      // but first swap workers_ out of the critical section
      upgrade_to_unique_lock<detail::shared_spinlock> unique_guard{guard};
      workers_.swap(workers);
      unique_guard.unlock();
      for (auto& w : workers)
        anon_send(w, tmp);
      unregister_from_system();
    }
    return true;
  }
  if (content.match_elements<down_msg>()) {
    // remove failed worker from pool
    auto& dm = content.get_as<down_msg>(0);
    upgrade_to_unique_lock<detail::shared_spinlock> unique_guard{guard};
    auto last = workers_.end();
    auto i = std::find(workers_.begin(), workers_.end(), dm.source);
    CAF_LOG_DEBUG_IF(i == last, "received down message for an unknown worker");
    if (i != last)
      workers_.erase(i);
    if (workers_.empty()) {
      planned_reason_ = exit_reason::out_of_workers;
      unique_guard.unlock();
      quit(eu);
    }
    return true;
  }
  if (content.match_elements<sys_atom, put_atom, actor>()) {
    auto& worker = content.get_as<actor>(2);
    worker->attach(default_attachable::make_monitor(worker.address(),
                                                    address()));
    upgrade_to_unique_lock<detail::shared_spinlock> unique_guard{guard};
    workers_.push_back(worker);
    return true;
  }
  if (content.match_elements<sys_atom, delete_atom, actor>()) {
    upgrade_to_unique_lock<detail::shared_spinlock> unique_guard{guard};
    auto& what = content.get_as<actor>(2);
    auto last = workers_.end();
    auto i = std::find(workers_.begin(), last, what);
    if (i != last) {
      workers_.erase(i);
    }
    return true;
  }
  if (content.match_elements<sys_atom, get_atom>()) {
    auto cpy = workers_;
    guard.unlock();
    sender->enqueue(nullptr, mid.response_id(),
                    make_message(std::move(cpy)), eu);
    return true;
  }
  if (workers_.empty()) {
    guard.unlock();
    if (sender && mid.valid()) {
      // tell client we have ignored this sync message by sending
      // and empty message back
      sender->enqueue(nullptr, mid.response_id(), message{}, eu);
    }
    return true;
  }
  return false;
}

bool actor_pool::filter(upgrade_lock<detail::shared_spinlock>& guard,
                        const actor_addr& sender, message_id mid,
                        const message& msg, execution_unit* eu) {
  auto rsn = planned_reason_;
  if (rsn != caf::exit_reason::not_exited) {
    guard.unlock();
    if (mid.valid()) {
      detail::sync_request_bouncer srq{rsn};
      srq(sender, mid);
    }
    return true;
  }
  if (msg.match_elements<exit_msg>()) {
    std::vector<actor> workers;
    // send exit messages *always* to all workers and clear vector afterwards
    // but first swap workers_ out of the critical section
    upgrade_to_unique_lock<detail::shared_spinlock> unique_guard{guard};
    workers_.swap(workers);
    planned_reason_ = msg.get_as<exit_msg>(0).reason;
    unique_guard.unlock();
    for (auto& w : workers) {
      anon_send(w, msg);
    }
    quit();
    return true;
  }
  if (msg.match_elements<down_msg>()) {
    // remove failed worker from pool
    auto& dm = msg.get_as<down_msg>(0);
    upgrade_to_unique_lock<detail::shared_spinlock> unique_guard{guard};
    auto last = workers_.end();
    auto i = std::find(workers_.begin(), workers_.end(), dm.source);
    if (i != last) {
      workers_.erase(i);
    }
    if (workers_.empty()) {
      planned_reason_ = exit_reason::out_of_workers;
      unique_guard.unlock();
      quit();
    }
    return true;
  }
  if (msg.match_elements<sys_atom, put_atom, actor>()) {
    auto& worker = msg.get_as<actor>(2);
    if (worker == invalid_actor) {
      return true;
    }
    worker->attach(default_attachable::make_monitor(address()));
    upgrade_to_unique_lock<detail::shared_spinlock> unique_guard{guard};
    workers_.push_back(worker);
    return true;
  }
  if (msg.match_elements<sys_atom, delete_atom, actor>()) {
    upgrade_to_unique_lock<detail::shared_spinlock> unique_guard{guard};
    auto& what = msg.get_as<actor>(2);
    auto last = workers_.end();
    auto i = std::find(workers_.begin(), last, what);
    if (i != last) {
      workers_.erase(i);
    }
    return true;
  }
  if (msg.match_elements<sys_atom, get_atom>()) {
    auto cpy = workers_;
    guard.unlock();
    actor_cast<abstract_actor*>(sender)->enqueue(invalid_actor_addr,
                                                 mid.response_id(),
                                                 make_message(std::move(cpy)),
                                                 eu);
    return true;
  }
  if (workers_.empty()) {
    guard.unlock();
    if (sender != invalid_actor_addr && mid.valid()) {
      // tell client we have ignored this sync message by sending
      // and empty message back
      auto ptr = actor_cast<abstract_actor_ptr>(sender);
      ptr->enqueue(invalid_actor_addr, mid.response_id(), message{}, eu);
    }
    return true;
  }
  return false;
}