this example as simple as possible, the counters
are not locked when incremented.
+&h2(Metrics Generation)
+The example also illustrates how a metrics object instance can be created
+and used to send appliction metrics to the collector.
+In this example the primary callback function will genereate metrics with
+the receipt of each 1000th message.
+
&space
&indent
.** pull in the code from the example directory
&ex_start
.im j=start-example ../../../examples/xapp_t1.cpp
&ex_end
-&figure( Simple callback application. )
+&fig_cen( Simple callback application. )
&uindent
&space