Sorry Felix, I was looking at the wrong branch when looking at the actionlib
revision history.

isServerConnected is exposed in Common-1.3.0.  Thus, it will be available in
the Diamondback release.  For now, you can probably get away with repeatedly
calling waitForServer with a very short timeout.

Vijay

On Fri, Feb 4, 2011 at 10:42 AM, Felix Ingrand <felix@laas.fr> wrote:

> Vijay,
>
> On 4 févr. 2011, at 19:12, Vijay Pradeep wrote:
>
> > Can you check what version of the common stack you are running?
> >
> > > roscd common
> > > cat CMakeLists.txt
> >
> > You'll see something like rosbuild_make_distribution(1.x.x)
>
> rosbuild_make_distribution(1.2.2)
>
> felix@cturtle:/opt/ros/cturtle/stacks/common$ grep isServerConnected
> /opt/ros/cturtle/stacks/common/actionlib/include/actionlib/client/simple_action_client.h
> felix@cturtle:/opt/ros/cturtle/stacks/common$
>
>
> Compiling I get this:
>
> pr2-action.cc:234: error: ‘class
> actionlib::SimpleActionClient<learning_actionlib::FibonacciAction_<std::allocator<void>
> > >’ has no member named ‘isServerConnected’
>
> I can find isServerConnected in connection_monitor.h, but not in
> simple_action_client.h
>
> felix@cturtle:/opt/ros/cturtle/stacks/common$ grep isServerConnected
> /opt/ros/cturtle/stacks/common/actionlib/include/actionlib/client/*.h
> /opt/ros/cturtle/stacks/common/actionlib/include/actionlib/client/connection_monitor.h:
>  bool isServerConnected();
> felix@cturtle:/opt/ros/cturtle/stacks/common$
>
>
>
> > isServerConnected was added in Common 1.2.0.  If you have an up-to-date
> C-Turtle release, it should definitely be there.
> >
> > > should I also check that isServerConnected? before the waitForServer?
> or isServerConnected just similar to waitForServer but return immediately?
> in this case, it is probably better to use it in place of waitForServer.
> >
> > In the actual implementation, waitForServer actually repeatedly calls
> isServerConnected until the timeout is reached or the server connects.
>  Thus, for your case, you should probably just use isServerConnected.
>
> OK, I will use isServerConnected... as soon as I can find it ;-)
>
> >
> > Vijay
> >
> > On Fri, Feb 4, 2011 at 1:17 AM, Felix Ingrand <felix@laas.fr> wrote:
> > Hi Vijay,
> >
> > On 3 févr. 2011, at 22:33, Vijay Pradeep wrote:
> >
> > > Hi Felix,
> > >
> > >
> > > Waiting for Server:
> > > Instead of calling waitForServer(), you can repeatedly call
> isServerConnected()
> > > Refer to the docs: SimpleActionClient::isServerConnected()
> >
> >
> > Is SimpleActionClient::isServerConnected() a recent addition? it does not
> seem to be define in my:
> >
> >
> /opt/ros/cturtle/stacks/common/actionlib/include/actionlib/client/simple_action_client.h
> >
> > while it is indeed in :
> >
> >
> http://www.ros.org/doc/api/actionlib/html/simple__action__client_8h_source.html
> >
> > Or am I including the wrong simple_action_client.h?
> >
> > PS: I am using the Ubuntu 10.4 VirtualBox appliance provided by WG, and
> which I regularly update.
> > --
> >     Felix
> > The danger of science denial: http://tinyurl.com/yyg5sfd
> >
> >
> >
> > _______________________________________________
> > ros-users mailing list
> > ros-users@code.ros.org
> > https://code.ros.org/mailman/listinfo/ros-users
> >
> >
> >
> > --
> > Vijay Pradeep
> > Systems Engineer
> > Willow Garage, Inc.
> > vpradeep@willowgarage.com
> >
> > _______________________________________________
> > ros-users mailing list
> > ros-users@code.ros.org
> > https://code.ros.org/mailman/listinfo/ros-users
>
> --
>      Felix
> You think you are making economical rational decisions...
> http://tinyurl.com/kvu9ck
>
>
> _______________________________________________
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> https://code.ros.org/mailman/listinfo/ros-users
>



-- 
Vijay Pradeep
Systems Engineer
Willow Garage, Inc.
 <tfoote@willowgarage.com>vpradeep@willowgarage.com