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Prepare EtcdHelper to extract more data from Node

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In order to support graceful deletion, the resource object will
need access to the TTL value in etcd.  Also, in the future we
may want to get the creation index (distinct from modifiedindex)
and expose it to clients.  Change EtcdResourceVersioner to be
more type specific (objects vs lists) and provide a default
implementation that relies on the internal API convention.

Also, rename etcd_tools.go to etcd_helper.go and split a few
things up.
This commit is contained in:
Clayton Coleman
2015-03-05 00:17:29 -05:00
parent 4ca90e0343
commit bddef32193
22 changed files with 251 additions and 163 deletions
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19
pkg/api/meta.go
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@@ -35,16 +35,27 @@ func HasObjectMetaSystemFieldValues(meta *ObjectMeta) bool {
len(meta.UID) != 0
}
// GetObjectMetaPtr returns a pointer to a provided object's ObjectMeta.
// ObjectMetaFor returns a pointer to a provided object's ObjectMeta.
// TODO: allow runtime.Unknown to extract this object
func ObjectMetaFor(obj runtime.Object) (*ObjectMeta, error) {
v, err := conversion.EnforcePtr(obj)
if err != nil {
return nil, err
}
var objectMeta *ObjectMeta
if err := runtime.FieldPtr(v, "ObjectMeta", &objectMeta); err != nil {
var meta *ObjectMeta
err = runtime.FieldPtr(v, "ObjectMeta", &meta)
return meta, err
}
// ListMetaFor returns a pointer to a provided object's ListMeta,
// or an error if the object does not have that pointer.
// TODO: allow runtime.Unknown to extract this object
func ListMetaFor(obj runtime.Object) (*ListMeta, error) {
v, err := conversion.EnforcePtr(obj)
if err != nil {
return nil, err
}
return objectMeta, nil
var meta *ListMeta
err = runtime.FieldPtr(v, "ListMeta", &meta)
return meta, err
}