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_
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);
    }

};
#endif