Get Dock Info

Retrieve the dock information

• Service Name: docking/dock_manager/get_dock

• Service Type: clearpath_dock_msgs/srv/GetDock

Python

import rclpy
from rclpy.node import Node

from clearpath_dock_msgs.srv import GetDock


class GetDock(Node):

    def __init__(self):
        super().__init__('get_dock_client')
        self._srv_client = self.create_client(GetDock, 'docking/dock_manager/get_dock')
        while not self._srv_client.wait_for_service(timeout_sec=1.0):
            self.get_logger().info('service not available, waiting again...')
        self.req = GetDock.Request()

    def send_request(self, lat, lon):
        # self.req.lat = lat
        # self.req.lon = lon
        self.future = self._srv_client.call_async(self.req)
        rclpy.spin_until_future_complete(self, self.future)
        return self.future.result()

if __name__ == '__main__':
    rclpy.init(args=args)
    get_dock_client = Getock()
    response = get_dock_client.send_request()
    if response.success:
      get_dock_client.get_logger().info('Retrived dock info succesfully!')
    else:
      get_dock_client.get_logger().error('Failed to retrieve dock info')
    
    get_dock_client.destroy_node()
    rclpy.shutdown()

C++

#include "rclcpp/rclcpp.hpp"
#include "clearpath_dock_msgs/srv/get_dock.hpp"

#include <chrono>
#include <cstdlib>
#include <memory>

using namespace std::chrono_literals;


int main(int argc, char **argv)
{
  rclcpp::init(argc, argv);

  std::shared_ptr<rclcpp::Node> node = rclcpp::Node::make_shared("get_dock_client");
  rclcpp::Client<clearpath_dock_msgs::srv::GetDock>::SharedPtr client =
    node->create_client<clearpath_dock_msgs::srv::GetDock>("docking/dock_manager/get_dock");

  auto request = std::make_shared<clearpath_dock_msgs::srv::GetDock::Request>();

  while (!client->wait_for_service(1s)) {
    if (!rclcpp::ok()) {
      RCLCPP_ERROR(rclcpp::get_logger("rclcpp"), "Interrupted while waiting for the service. Exiting.");
      return 0;
    }
    RCLCPP_INFO(rclcpp::get_logger("rclcpp"), "service not available, waiting again...");
  }

  auto result = client->async_send_request(request);
  // Wait for the result.
  if (rclcpp::spin_until_future_complete(node, result) ==
    rclcpp::FutureReturnCode::SUCCESS)
  {
    if (result.get()->success)
    {
      RCLCPP_INFO(rclcpp::get_logger("rclcpp"), "Retrived dock info successfully");
    }
    else
    {
      RCLCPP_INFO(rclcpp::get_logger("rclcpp"), "Failed to retrieve dock info");
    }
  } else {
    RCLCPP_ERROR(rclcpp::get_logger("rclcpp"), "Failed to call service docking/dock_manager/get_dock");
  }

  rclcpp::shutdown();
  return 0;
}