LostAdvertisedName() is never called

asked 2014-04-08 03:00:02 -0700

praetp gravatar image

When I find a remote bus, I am never notified when it disappears. No matter what I seem to do (like calling ReleaseName() the name or CancelAdvertisedName() from the 'server'-side myself), it simply does not work... I was so puzzled by this, I added the LostAdvertisedName() to the basic_client sample myself. Even there it does not work (so I don't think the problem is on my end..) Is this a bug ?

(BTW: NameOwnerChanged() IS called when the remote end disappears..)

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answered 2014-04-08 10:54:40 -0700

georgen gravatar image

updated 2014-04-08 10:55:31 -0700

if you are making modifications to the basic_client sample all you should need to do to get a LostAdvertisedName signal is add the following code to the MyBusListener class:

void LostAdvertisedName(const char* name, TransportMask transport, const char* namePrefix) {
    printf("LostAdvertisedName(name='%s', prefix='%s')\n", name, namePrefix);

However, running the code you will see that the LostAdvertisedName is still not called this is simply because the basic_client exits before the routing node has time to send out the LostAdvertisedName signal.

if you are using the basic_client and basic_service samples. You will need to add some code that waits at the end of the basic_client before destroying the BusAttachment. Then run the service and client. When you exit the client you should get a LostAdvertisedName.

Side note:

  • RequestName and ReleaseName only specify local ownership the name can not be found till you do an AdvertiseName
  • AdvertiseName and CancelAdvertiseName is called once you already have local ownership of the name
  • you will not get the FoundAdvertisedName or the LostAdvertisedName signals till you have called the FindAdvertisedName method
  • NameOwnerChanged signal will not be sent for a remote name till you establish a session. The NameOwnerChanged signal is only reliable for locally owned names. You should use the functions/callbacks that specify Advertise or Advertised in the function name for anything that is going between two devices or two applications with routing nodes built into the application.
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Thanks for your elaborate answer. It works indeed as you described. However, when I do a FindAdvertisedName() with an empty string, I get all the names in FoundAdvertisedName() but they are not reported in LostAdvertisedName() ...

praetp ( 2014-04-09 02:23:36 -0700 )edit

Also, some of those things you mention in the side note, are not mentioned in the header files...

praetp ( 2014-04-09 02:24:27 -0700 )edit
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Asked: 2014-04-08 03:00:02 -0700

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Last updated: Apr 08 '14