[Libguestfs] [PATCH v2 4/7] v2v: -o libvirt: use a Lazy for the connection

Store the Libvirt.Connect.t object as instance variable, so it can be used also outside of prepare_targets. Use a private method to access it, so there is no need to directly use the Lazy object. --- v2v/output_libvirt.ml | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) diff --git a/v2v/output_libvirt.ml b/v2v/output_libvirt.ml index 6bad91778..6971b685f 100644 --- a/v2v/output_libvirt.ml +++ b/v2v/output_libvirt.ml @@ -59,11 +59,16 @@ let target_features_of_capabilities_doc doc arch = List.map Xml.node_name features ) -class output_libvirt oc output_pool = object +class output_libvirt oc output_pool = +object (self) inherit output val mutable capabilities_doc = None val mutable pool_name = None + val lazy_conn = lazy (Libvirt.Connect.connect ?name:oc ()) + + method private conn : Libvirt.rw Libvirt.Connect.t = + Lazy.force lazy_conn method as_options = match oc with @@ -71,13 +76,10 @@ class output_libvirt oc output_pool = object | Some uri -> sprintf "-o libvirt -oc %s -os %s" uri output_pool method prepare_targets source overlays _ _ _ _ = - (* Open the connection to libvirt. *) - let conn = Libvirt.Connect.connect ?name:oc () in - (* Get the capabilities from libvirt. *) let xml = try - Libvirt.Connect.get_capabilities conn + Libvirt.Connect.get_capabilities self#conn with Libvirt.Virterror { message } -> error (f_"cannot get libvirt hypervisor capabilities: %s") @@ -96,7 +98,7 @@ class output_libvirt oc output_pool = object capabilities_doc <- Some doc; (* Does the domain already exist on the target? (RHBZ#889082) *) - if Libvirt_utils.domain_exists conn source.s_name then ( + if Libvirt_utils.domain_exists self#conn source.s_name then ( if source.s_hypervisor = Physical then (* virt-p2v user *) error (f_"a libvirt domain called ‘%s’ already exists on the target.\n\nIf using virt-p2v, select a different ‘Name’ in the ‘Target properties’. Or delete the existing domain on the target using the ‘virsh undefine’ command.") source.s_name @@ -109,7 +111,7 @@ class output_libvirt oc output_pool = object * and dump out its XML. *) let xml = - let pool = Libvirt_utils.get_pool conn output_pool in + let pool = Libvirt_utils.get_pool self#conn output_pool in Libvirt.Pool.get_xml_desc (Libvirt.Pool.const pool) in let doc = Xml.parse_memory xml in let xpathctx = Xml.xpath_new_context doc in -- 2.17.2