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mongoc_client_select_server

mongoc_client_select_server()

mongoc_server_description_t *
mongoc_client_select_server (mongoc_client_t *client,
                             bool for_writes,
                             const mongoc_read_prefs_t *prefs,
                             bson_error_t *error) BSON_GNUC_WARN_UNUSED_RESULT;


Choose a server for an operation, according to the logic described in the Server Selection Spec.

Use this function only for building a language driver that wraps the C Driver. When writing applications in C, higher-level functions automatically select a suitable server.

  • client: A mongoc_client_t.
  • for_writes: Whether to choose a server suitable for writes or reads.
  • prefs: An optional mongoc_read_prefs_t. If for_writes is true, prefs must be NULL. Otherwise, use prefs to customize server selection, or pass NULL to use read preference PRIMARY.
  • error: An optional location for a bson_error_t or NULL.

A mongoc_server_description_t that must be freed with mongoc_server_description_destroy. If no suitable server is found, returns NULL and error is filled out.

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