NAME

       mongoc_topology_description_has_readable_server                                          -
       mongoc_topology_description_has_readable_server()

SYNOPSIS

          bool
          mongoc_topology_description_has_readable_server (
             mongoc_topology_description_t *td, const mongoc_read_prefs_t *prefs);

       Determines if the topology has a readable server available.  Servers are filtered  by  the
       given  read  preferences  only  if the driver is connected to a replica set, otherwise the
       read preferences are ignored.  This function uses the driver's current  knowledge  of  the
       state  of the MongoDB server or servers it is connected to; it does no I/O and it does not
       block.

       Use    this    function    in    a    topology-changed    callback     registered     with
       mongoc_apm_set_topology_changed_cb.        For        historical        reasons,       the
       mongoc_topology_description_t passed to the callback is a const  pointer,  you  must  cast
       away const to pass the pointer to mongoc_topology_description_has_readable_server.

PARAMETERS

       • td: A mongoc_topology_description_t.

       • read_prefs: A mongoc_read_prefs_t or NULL for default read preferences.

RETURNS

       True if there is a known server matching prefs.

SEE ALSO

       Introduction to Application Performance Monitoring

AUTHOR

       MongoDB, Inc

COPYRIGHT

       2017-present, MongoDB, Inc

1.16.1                                     Mar MONGOC2TOPOLOGY_DESCRIPTION_HAS_READABLE_SERVER(3)