service_client_imp.h

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* Author: Eitan Marder-Eppstein
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#ifndef ACTIONLIB__CLIENT__SERVICE_CLIENT_IMP_H_
#define ACTIONLIB__CLIENT__SERVICE_CLIENT_IMP_H_

#include <string>

#include "ros/console.h"

namespace actionlib
{
template<class ActionSpec>
ServiceClientImpT<ActionSpec>::ServiceClientImpT(ros::NodeHandle n, std::string name)
{
  ac_.reset(new SimpleActionClientT(n, name, true));
}

template<class ActionSpec>
bool ServiceClientImpT<ActionSpec>::waitForServer(const ros::Duration & timeout)
{
  return ac_->waitForServer(timeout);
}

template<class ActionSpec>
bool ServiceClientImpT<ActionSpec>::isServerConnected()
{
  return ac_->isServerConnected();
}

template<class ActionSpec>
bool ServiceClientImpT<ActionSpec>::call(const void * goal, std::string goal_md5sum,
  void * result, std::string result_md5sum)
{
  // ok... we need to static cast the goal message and result message
  const Goal * goal_c = static_cast<const Goal *>(goal);
  Result * result_c = static_cast<Result *>(result);

  // now we need to check that the md5sums are correct
  namespace mt = ros::message_traits;

  if (strcmp(mt::md5sum(*goal_c),
    goal_md5sum.c_str()) || strcmp(mt::md5sum(*result_c), result_md5sum.c_str()))
  {
    ROS_ERROR_NAMED("actionlib", "Incorrect md5Sums for goal and result types");
    return false;
  }

  if (!ac_->isServerConnected()) {
    ROS_ERROR_NAMED("actionlib",
      "Attempting to make a service call when the server isn't actually connected to the client.");
    return false;
  }

  ac_->sendGoalAndWait(*goal_c);
  if (ac_->getState() == SimpleClientGoalState::SUCCEEDED) {
    (*result_c) = *(ac_->getResult());
    return true;
  }

  return false;
}

//****** ServiceClient *******************
template<class Goal, class Result>
bool ServiceClient::call(const Goal & goal, Result & result)
{
  namespace mt = ros::message_traits;
  return client_->call(&goal, mt::md5sum(goal), &result, mt::md5sum(result));
}

bool ServiceClient::waitForServer(const ros::Duration & timeout)
{
  return client_->waitForServer(timeout);
}

bool ServiceClient::isServerConnected()
{
  return client_->isServerConnected();
}

//****** actionlib::serviceClient *******************
template<class ActionSpec>
ServiceClient serviceClient(ros::NodeHandle n, std::string name)
{
  boost::shared_ptr<ServiceClientImp> client_ptr(new ServiceClientImpT<ActionSpec>(n, name));
  return ServiceClient(client_ptr);
}

}  // namespace actionlib
#endif  // ACTIONLIB__CLIENT__SERVICE_CLIENT_IMP_H_