service does not exist -- don't know why

[David Liebman]

HI. I really like rosbridge, bye the way. Here is my big problem.

Here is some javascript that I am trying to get to work. It uses roslibjs, v2, I think. It doesn't work. The error message I get follows.

    ros = new ROSLIB.Ros({
        url : 'ws://localhost:9090'
      });
   
    map_service_load = new ROSLIB.Service({
        'ros' : ros,
        'name' : app_manager_prefix + rootname +
        '/load_map_db',
            serviceType : 'tele_presence/MapPublish'
      });
     
      var request = new ROSLIB.ServiceRequest({ "map_id": commands.id});
    map_service_load.callService( request, function (result) {
        console.log(result.message);
        sendMapBroadcast(commands.wizard, null, 0);
    } );
     
Here is the error message:

[ERROR] [WallTime: 1394898248.958051] [Client 0] [id: call_service:/app_manager/application/load_map_db:12] call_service InvalidServiceException: Service /app_manager/application/load_map_db does not exist

     
Here is some python that the service should call. It's boring and long, but I want to be as complete as possible:

     
def init_fn():
    global client, db, collection, grid, map_pub, meta_pub
    rospy.init_node('turtlebot_db', anonymous=True)
    map_pub = rospy.Publisher('map', OccupancyGrid, latch=True)
    meta_pub = rospy.Publisher('map_metadata', MapMetaData, latch=True)
      rospy.Service('load_map_db', MapPublish, map_load)
      rospy.spin()
     
def map_load(req):
    #
    global map_pub, meta_pub
    #
    whole_map = MapWithMetaData()
    whole_map = collection.find_one({ 'info.map_id' : req.map_id })
    if whole_map == None :
        return ['badmap']
    ##
    ## SOME BORING STUFF HERE...
    ##
   
    map_pub.publish(oldmap)
    meta_pub.publish(oldmap.info)
    #
    return ['done']

catkin_make finishes cleanly. Here is a snippet from CMakeLists.txt:

add_service_files(
   FILES
   CreateMap.srv
   PictureMap.srv
   BasicLaunch.srv
   BasicStop.srv
  
  
   MapSave.srv
   MapLoad.srv
   MapPublish.srv
   MapRename.srv
   MapList.srv
   MapDelete.srv
  
)

Can someone help me get this to work? I have several other services that I call from the same js and python code that work. I don't know why this one is not working.

[David Liebman]

it seems my code snippets are not that good. I can re-include things if people want.

[David Liebman]

the javascript should look more like this:

ros = new ROSLIB.Ros({
        url : 'ws://localhost:9090'
      });
   
    map_service_load = new ROSLIB.Service({
        'ros' : ros,

        'name' : '/app_manager/application/' +

        '/load_map_db',
            serviceType : 'tele_presence/MapPublish'
      });
     

      var request = new ROSLIB.ServiceRequest({ "map_id": 'some-string'});
    map_service_load.callService( request, function (result) {
        //do something here
       
    } );

[Chad Jenkins]

Hi David,

Thanks for using rosbridge and roslibjs.  Apologies for the delayed response.  It is a busy time these days.

If this is still an issue, could you post it to the roslibjs or rosbridge repos on Robot Web Tools?  I still check rosbridge-users, but most of the active developers tend to look at RWT repos.

  https://github.com/RobotWebTools/roslibjs

Thanks!
___

Chad

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[Jihoon]

Hello David,

I was helping you in ROS Answers. I have created an issue regarding wait_for_service support in roslibjs issue tracker.
We can continue further discussion in the issue.

ROS Answers : http://answers.ros.org/question/140066/service-does-not-exist-app_manager-rapp-hydro-python-turtlebot/
Issue : https://github.com/RobotWebTools/roslibjs/issues/70

Regards,
Jihoon