Program Listing for File parameters_handler.hpp
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// Copyright (c) 2022 Samsung Research America, @artofnothingness Alexey Budyakov
//
// Licensed 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.
#ifndef NAV2_MPPI_CONTROLLER__TOOLS__PARAMETERS_HANDLER_HPP_
#define NAV2_MPPI_CONTROLLER__TOOLS__PARAMETERS_HANDLER_HPP_
#include <functional>
#include <string>
#include <type_traits>
#include <unordered_map>
#include <utility>
#include <vector>
#include "nav2_util/node_utils.hpp"
#include "rclcpp/rclcpp.hpp"
#include "rclcpp/parameter_value.hpp"
#include "rclcpp_lifecycle/lifecycle_node.hpp"
namespace mppi
{
enum class ParameterType { Dynamic, Static };
class ParametersHandler
{
public:
using get_param_func_t = void (const rclcpp::Parameter & param);
using post_callback_t = void ();
using pre_callback_t = void ();
ParametersHandler() = default;
explicit ParametersHandler(
const rclcpp_lifecycle::LifecycleNode::WeakPtr & parent);
void start();
rcl_interfaces::msg::SetParametersResult dynamicParamsCallback(
std::vector<rclcpp::Parameter> parameters);
inline auto getParamGetter(const std::string & ns);
template<typename T>
void addPostCallback(T && callback);
template<typename T>
void addPreCallback(T && callback);
template<typename T>
void setDynamicParamCallback(T & setting, const std::string & name);
std::mutex * getLock()
{
return ¶meters_change_mutex_;
}
template<typename T>
void addDynamicParamCallback(const std::string & name, T && callback);
protected:
template<typename SettingT, typename ParamT>
void getParam(
SettingT & setting, const std::string & name, ParamT default_value,
ParameterType param_type = ParameterType::Dynamic);
template<typename ParamT, typename SettingT, typename NodeT>
void setParam(SettingT & setting, const std::string & name, NodeT node) const;
template<typename T>
static auto as(const rclcpp::Parameter & parameter);
std::mutex parameters_change_mutex_;
rclcpp::Logger logger_{rclcpp::get_logger("MPPIController")};
rclcpp::node_interfaces::OnSetParametersCallbackHandle::SharedPtr
on_set_param_handler_;
rclcpp_lifecycle::LifecycleNode::WeakPtr node_;
std::string node_name_;
bool verbose_{false};
std::unordered_map<std::string, std::function<get_param_func_t>>
get_param_callbacks_;
std::vector<std::function<pre_callback_t>> pre_callbacks_;
std::vector<std::function<post_callback_t>> post_callbacks_;
};
inline auto ParametersHandler::getParamGetter(const std::string & ns)
{
return [this, ns](
auto & setting, const std::string & name, auto default_value,
ParameterType param_type = ParameterType::Dynamic) {
getParam(
setting, ns.empty() ? name : ns + "." + name,
std::move(default_value), param_type);
};
}
template<typename T>
void ParametersHandler::addDynamicParamCallback(const std::string & name, T && callback)
{
get_param_callbacks_[name] = callback;
}
template<typename T>
void ParametersHandler::addPostCallback(T && callback)
{
post_callbacks_.push_back(callback);
}
template<typename T>
void ParametersHandler::addPreCallback(T && callback)
{
pre_callbacks_.push_back(callback);
}
template<typename SettingT, typename ParamT>
void ParametersHandler::getParam(
SettingT & setting, const std::string & name,
ParamT default_value,
ParameterType param_type)
{
auto node = node_.lock();
nav2_util::declare_parameter_if_not_declared(
node, name, rclcpp::ParameterValue(default_value));
setParam<ParamT>(setting, name, node);
if (param_type == ParameterType::Dynamic) {
setDynamicParamCallback(setting, name);
}
}
template<typename ParamT, typename SettingT, typename NodeT>
void ParametersHandler::setParam(
SettingT & setting, const std::string & name, NodeT node) const
{
ParamT param_in{};
node->get_parameter(name, param_in);
setting = static_cast<SettingT>(param_in);
}
template<typename T>
void ParametersHandler::setDynamicParamCallback(T & setting, const std::string & name)
{
if (get_param_callbacks_.find(name) != get_param_callbacks_.end()) {
return;
}
auto callback = [this, &setting, name](const rclcpp::Parameter & param) {
setting = as<T>(param);
if (verbose_) {
RCLCPP_INFO(logger_, "Dynamic parameter changed: %s", std::to_string(param).c_str());
}
};
addDynamicParamCallback(name, callback);
if (verbose_) {
RCLCPP_INFO(logger_, "Dynamic Parameter added %s", name.c_str());
}
}
template<typename T>
auto ParametersHandler::as(const rclcpp::Parameter & parameter)
{
if constexpr (std::is_same_v<T, bool>) {
return parameter.as_bool();
} else if constexpr (std::is_integral_v<T>) {
return parameter.as_int();
} else if constexpr (std::is_floating_point_v<T>) {
return parameter.as_double();
} else if constexpr (std::is_same_v<T, std::string>) {
return parameter.as_string();
} else if constexpr (std::is_same_v<T, std::vector<int64_t>>) {
return parameter.as_integer_array();
} else if constexpr (std::is_same_v<T, std::vector<double>>) {
return parameter.as_double_array();
} else if constexpr (std::is_same_v<T, std::vector<std::string>>) {
return parameter.as_string_array();
} else if constexpr (std::is_same_v<T, std::vector<bool>>) {
return parameter.as_bool_array();
}
}
} // namespace mppi
#endif // NAV2_MPPI_CONTROLLER__TOOLS__PARAMETERS_HANDLER_HPP_