// ExtractObjToList unmarshals json found at key and opaques it into a *List api object
// (an object that satisfies the runtime.IsList definition).
func (h *EtcdHelper) ExtractObjToList(key string, listObj runtime.Object) error {
trace := util.NewTrace("ExtractObjToList " + getTypeName(listObj))
listPtr, err := runtime.GetItemsPtr(listObj)
if err != nil {
return err
}
key = h.PrefixEtcdKey(key)
startTime := time.Now()
trace.Step("About to read etcd node")
response, err := h.Client.Get(key, false, false)
recordEtcdRequestLatency("get", getTypeName(listPtr), startTime)
trace.Step("Etcd node read")
if err != nil {
if IsEtcdNotFound(err) {
return nil
}
return err
}
nodes := make([]*etcd.Node, 0)
nodes = append(nodes, response.Node)
if err := h.decodeNodeList(nodes, listPtr); err != nil {
return err
}
trace.Step("Object decoded")
if h.Versioner != nil {
if err := h.Versioner.UpdateList(listObj, response.EtcdIndex); err != nil {
return err
}
}
return nil
}
// ExtractToList works on a *List api object (an object that satisfies the runtime.IsList
// definition) and extracts a go object per etcd node into a slice with the resource version.
func (h *EtcdHelper) ExtractToList(key string, listObj runtime.Object) error {
trace := util.NewTrace("ExtractToList " + getTypeName(listObj))
defer trace.LogIfLong(time.Second)
listPtr, err := runtime.GetItemsPtr(listObj)
if err != nil {
return err
}
key = h.PrefixEtcdKey(key)
startTime := time.Now()
trace.Step("About to list etcd node")
nodes, index, err := h.listEtcdNode(key)
recordEtcdRequestLatency("list", getTypeName(listPtr), startTime)
trace.Step("Etcd node listed")
if err != nil {
return err
}
if err := h.decodeNodeList(nodes, listPtr); err != nil {
return err
}
trace.Step("Node list decoded")
if h.Versioner != nil {
if err := h.Versioner.UpdateList(listObj, index); err != nil {
return err
}
}
return nil
}