typedef void (*mongoc_apm_topology_changed_cb_t) (

       MongoDB, Inc

       2009-present, MongoDB, Inc.

1.30.4                                            Jun 08, 2025             MONGOC_APM_SET_TOPOLOGY_CHANGED_CB(3)

       • callbacks: A mongoc_apm_callbacks_t.

       • cb:  A  function  to call with a mongoc_apm_topology_changed_t whenever the driver observes a change in
         any of the servers it is connected to or a change in the overall server topology.

       SEEALSO:IntroductiontoApplicationPerformanceMonitoring

          typedef void (*mongoc_apm_topology_changed_cb_t) (
             const mongoc_apm_topology_changed_t *event);

          void
          mongoc_apm_set_topology_changed_cb (mongoc_apm_callbacks_t *callbacks,
                                              mongoc_apm_topology_changed_cb_t cb);

       Receive an event notification whenever the driver observes a change in any of the servers it is connected
       to or a change in the overall server topology.