moveit_simple_controller_manager.cpp

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 *  Copyright (c) 2013, Unbounded Robotics Inc.
 *  Copyright (c) 2012, Willow Garage, Inc.
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/* Author: Michael Ferguson, Ioan Sucan, E. Gil Jones */
 
#include <moveit_simple_controller_manager/action_based_controller_handle.h>
#include <moveit_simple_controller_manager/gripper_controller_handle.h>
#include <moveit_simple_controller_manager/follow_joint_trajectory_controller_handle.h>
#include <boost/algorithm/string/join.hpp>
#include <pluginlib/class_list_macros.hpp>
#include <rclcpp/logger.hpp>
#include <rclcpp/logging.hpp>
#include <rclcpp/node.hpp>
#include <rclcpp/parameter.hpp>
#include <rclcpp/parameter_value.hpp>
#include <algorithm>
#include <map>
#include <moveit/utils/logger.hpp>
 
namespace
{
template <typename... T>
std::string concatenateWithSeparator(char separator, T... content)
{
  std::string result;
  (result.append(content).append({ separator }), ...);
  result.erase(result.end() - 1);  // delete trailing separator
  return result;
}
 
template <typename... T>
std::string makeParameterName(T... strings)
{
  return concatenateWithSeparator<T...>('.', strings...);
}
 
}  // namespace
 
namespace moveit_simple_controller_manager
{
namespace
{
rclcpp::Logger getLogger()
{
  return moveit::getLogger("moveit_simple_controller_manager");
}
}  // namespace
static const std::string PARAM_BASE_NAME = "moveit_simple_controller_manager";
class MoveItSimpleControllerManager : public moveit_controller_manager::MoveItControllerManager
{
public:
  MoveItSimpleControllerManager() = default;
 
  ~MoveItSimpleControllerManager() override = default;
 
  void initialize(const rclcpp::Node::SharedPtr& node) override
  {
    node_ = node;
    if (!node_->has_parameter(makeParameterName(PARAM_BASE_NAME, "controller_names")))
    {
      RCLCPP_ERROR_STREAM(getLogger(), "No controller_names specified.");
      return;
    }
    rclcpp::Parameter controller_names_param;
    node_->get_parameter(makeParameterName(PARAM_BASE_NAME, "controller_names"), controller_names_param);
    if (controller_names_param.get_type() != rclcpp::ParameterType::PARAMETER_STRING_ARRAY)
    {
      RCLCPP_ERROR(getLogger(), "Parameter controller_names should be specified as a string array");
      return;
    }
    std::vector<std::string> controller_names = controller_names_param.as_string_array();
    /* actually create each controller */
    for (const std::string& controller_name : controller_names)
    {
      try
      {
        std::string action_ns;
        const std::string& action_ns_param = makeParameterName(PARAM_BASE_NAME, controller_name, "action_ns");
        if (!node_->get_parameter(action_ns_param, action_ns))
        {
          RCLCPP_ERROR_STREAM(getLogger(), "No action namespace specified for controller `"
                                               << controller_name << "` through parameter `" << action_ns_param << '`');
          continue;
        }
 
        std::string type;
        if (!node_->get_parameter(makeParameterName(PARAM_BASE_NAME, controller_name, "type"), type))
        {
          RCLCPP_ERROR_STREAM(getLogger(), "No type specified for controller " << controller_name);
          continue;
        }
 
        std::vector<std::string> controller_joints;
        if (!node_->get_parameter(makeParameterName(PARAM_BASE_NAME, controller_name, "joints"), controller_joints) ||
            controller_joints.empty())
        {
          RCLCPP_ERROR_STREAM(getLogger(), "No joints specified for controller " << controller_name);
          continue;
        }
 
        ActionBasedControllerHandleBasePtr new_handle;
        if (type == "GripperCommand")
        {
          double max_effort;
          const std::string& max_effort_param = makeParameterName(PARAM_BASE_NAME, controller_name, "max_effort");
          if (!node->get_parameter(max_effort_param, max_effort))
          {
            RCLCPP_INFO_STREAM(getLogger(), "Max effort set to 0.0");
            max_effort = 0.0;
          }
 
          new_handle = std::make_shared<GripperControllerHandle>(node_, controller_name, action_ns, max_effort);
          bool parallel_gripper = false;
          if (node_->get_parameter(makeParameterName(PARAM_BASE_NAME, "parallel"), parallel_gripper) && parallel_gripper)
          {
            if (controller_joints.size() != 2)
            {
              RCLCPP_ERROR_STREAM(getLogger(), "Parallel Gripper requires exactly two joints, "
                                                   << controller_joints.size() << " are specified");
              continue;
            }
            static_cast<GripperControllerHandle*>(new_handle.get())
                ->setParallelJawGripper(controller_joints[0], controller_joints[1]);
          }
          else
          {
            std::string command_joint;
            if (!node_->get_parameter(makeParameterName(PARAM_BASE_NAME, "command_joint"), command_joint))
              command_joint = controller_joints[0];
 
            static_cast<GripperControllerHandle*>(new_handle.get())->setCommandJoint(command_joint);
          }
 
          bool allow_failure;
          node_->get_parameter_or(makeParameterName(PARAM_BASE_NAME, "allow_failure"), allow_failure, false);
          static_cast<GripperControllerHandle*>(new_handle.get())->allowFailure(allow_failure);
 
          RCLCPP_INFO_STREAM(getLogger(), "Added GripperCommand controller for " << controller_name);
          controllers_[controller_name] = new_handle;
        }
        else if (type == "FollowJointTrajectory")
        {
          new_handle = std::make_shared<FollowJointTrajectoryControllerHandle>(node_, controller_name, action_ns);
          RCLCPP_INFO_STREAM(getLogger(), "Added FollowJointTrajectory controller for " << controller_name);
          controllers_[controller_name] = new_handle;
        }
        else
        {
          RCLCPP_ERROR_STREAM(getLogger(), "Unknown controller type: " << type);
          continue;
        }
        if (!controllers_[controller_name])
        {
          controllers_.erase(controller_name);
          continue;
        }
 
        moveit_controller_manager::MoveItControllerManager::ControllerState state;
        node_->get_parameter_or(makeParameterName(PARAM_BASE_NAME, controller_name, "default"), state.default_, false);
        state.active_ = true;
 
        controller_states_[controller_name] = state;
 
        /* add list of joints, used by controller manager and MoveIt */
        for (const std::string& controller_joint : controller_joints)
          new_handle->addJoint(controller_joint);
      }
      catch (...)
      {
        RCLCPP_ERROR_STREAM(getLogger(), "Caught unknown exception while parsing controller information");
      }
    }
  }
  /*
   * Get a controller, by controller name (which was specified in the controllers.yaml
   */
  moveit_controller_manager::MoveItControllerHandlePtr getControllerHandle(const std::string& name) override
  {
    std::map<std::string, ActionBasedControllerHandleBasePtr>::const_iterator it = controllers_.find(name);
    if (it != controllers_.end())
    {
      return static_cast<moveit_controller_manager::MoveItControllerHandlePtr>(it->second);
    }
    else
    {
      RCLCPP_FATAL_STREAM(getLogger(), "No such controller: " << name);
    }
    return moveit_controller_manager::MoveItControllerHandlePtr();
  }
 
  /*
   * Get the list of controller names.
   */
  void getControllersList(std::vector<std::string>& names) override
  {
    for (std::map<std::string, ActionBasedControllerHandleBasePtr>::const_iterator it = controllers_.begin();
         it != controllers_.end(); ++it)
      names.push_back(it->first);
    RCLCPP_INFO_STREAM(getLogger(), "Returned " << names.size() << " controllers in list");
  }
 
  /*
   * This plugin assumes that all controllers are already active -- and if they are not, well, it has no way to deal
   * with it anyways!
   */
  void getActiveControllers(std::vector<std::string>& names) override
  {
    getControllersList(names);
  }
 
  /*
   * Controller must be loaded to be active, see comment above about active controllers...
   */
  virtual void getLoadedControllers(std::vector<std::string>& names)
  {
    getControllersList(names);
  }
 
  /*
   * Get the list of joints that a controller can control.
   */
  void getControllerJoints(const std::string& name, std::vector<std::string>& joints) override
  {
    std::map<std::string, ActionBasedControllerHandleBasePtr>::const_iterator it = controllers_.find(name);
    if (it != controllers_.end())
    {
      it->second->getJoints(joints);
    }
    else
    {
      RCLCPP_WARN(getLogger(),
                  "The joints for controller '%s' are not known. Perhaps the controller configuration is "
                  "not loaded on the param server?",
                  name.c_str());
      joints.clear();
    }
  }
 
  moveit_controller_manager::MoveItControllerManager::ControllerState
  getControllerState(const std::string& name) override
  {
    return controller_states_[name];
  }
 
  /* Cannot switch our controllers */
  bool switchControllers(const std::vector<std::string>& /* activate */,
                         const std::vector<std::string>& /* deactivate */) override
  {
    return false;
  }
 
protected:
  rclcpp::Node::SharedPtr node_;
  std::map<std::string, ActionBasedControllerHandleBasePtr> controllers_;
  std::map<std::string, moveit_controller_manager::MoveItControllerManager::ControllerState> controller_states_;
};
 
}  // end namespace moveit_simple_controller_manager
 
PLUGINLIB_EXPORT_CLASS(moveit_simple_controller_manager::MoveItSimpleControllerManager,
                       moveit_controller_manager::MoveItControllerManager);