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// Copyright 2014 Canonical Ltd.
// Copyright 2014 Cloudbase Solutions
// Licensed under the AGPLv3, see LICENCE file for details.
package common
import (
"github.com/juju/errors"
"gopkg.in/juju/names.v2"
"github.com/juju/juju/apiserver/params"
"github.com/juju/juju/state"
)
// RebootRequester implements the RequestReboot API method
type RebootRequester struct {
st state.EntityFinder
auth GetAuthFunc
}
func NewRebootRequester(st state.EntityFinder, auth GetAuthFunc) *RebootRequester {
return &RebootRequester{
st: st,
auth: auth,
}
}
func (r *RebootRequester) oneRequest(tag names.Tag) error {
entity0, err := r.st.FindEntity(tag)
if err != nil {
return err
}
entity, ok := entity0.(state.RebootFlagSetter)
if !ok {
return NotSupportedError(tag, "request reboot")
}
return entity.SetRebootFlag(true)
}
// RequestReboot sets the reboot flag on the provided machines
func (r *RebootRequester) RequestReboot(args params.Entities) (params.ErrorResults, error) {
result := params.ErrorResults{
Results: make([]params.ErrorResult, len(args.Entities)),
}
if len(args.Entities) == 0 {
return result, nil
}
auth, err := r.auth()
if err != nil {
return params.ErrorResults{}, errors.Trace(err)
}
for i, entity := range args.Entities {
tag, err := names.ParseTag(entity.Tag)
if err != nil {
result.Results[i].Error = ServerError(ErrPerm)
continue
}
err = ErrPerm
if auth(tag) {
err = r.oneRequest(tag)
}
result.Results[i].Error = ServerError(err)
}
return result, nil
}
// RebootActionGetter implements the GetRebootAction API method
type RebootActionGetter struct {
st state.EntityFinder
auth GetAuthFunc
}
func NewRebootActionGetter(st state.EntityFinder, auth GetAuthFunc) *RebootActionGetter {
return &RebootActionGetter{
st: st,
auth: auth,
}
}
func (r *RebootActionGetter) getOneAction(tag names.Tag) (params.RebootAction, error) {
entity0, err := r.st.FindEntity(tag)
if err != nil {
return "", err
}
entity, ok := entity0.(state.RebootActionGetter)
if !ok {
return "", NotSupportedError(tag, "request reboot")
}
rAction, err := entity.ShouldRebootOrShutdown()
if err != nil {
return params.ShouldDoNothing, err
}
return params.RebootAction(rAction), nil
}
// GetRebootAction returns the action a machine agent should take.
// If a reboot flag is set on the machine, then that machine is
// expected to reboot (params.ShouldReboot).
// a reboot flag set on the machine parent or grandparent, will
// cause the machine to shutdown (params.ShouldShutdown).
// If no reboot flag is set, the machine should do nothing (params.ShouldDoNothing).
func (r *RebootActionGetter) GetRebootAction(args params.Entities) (params.RebootActionResults, error) {
result := params.RebootActionResults{
Results: make([]params.RebootActionResult, len(args.Entities)),
}
if len(args.Entities) == 0 {
return result, nil
}
auth, err := r.auth()
if err != nil {
return params.RebootActionResults{}, errors.Trace(err)
}
for i, entity := range args.Entities {
tag, err := names.ParseTag(entity.Tag)
if err != nil {
result.Results[i].Error = ServerError(ErrPerm)
continue
}
err = ErrPerm
if auth(tag) {
result.Results[i].Result, err = r.getOneAction(tag)
}
result.Results[i].Error = ServerError(err)
}
return result, nil
}
// RebootFlagClearer implements the ClearReboot API call
type RebootFlagClearer struct {
st state.EntityFinder
auth GetAuthFunc
}
func NewRebootFlagClearer(st state.EntityFinder, auth GetAuthFunc) *RebootFlagClearer {
return &RebootFlagClearer{
st: st,
auth: auth,
}
}
func (r *RebootFlagClearer) clearOneFlag(tag names.Tag) error {
entity0, err := r.st.FindEntity(tag)
if err != nil {
return err
}
entity, ok := entity0.(state.RebootFlagSetter)
if !ok {
return NotSupportedError(tag, "clear reboot flag")
}
return entity.SetRebootFlag(false)
}
// ClearReboot will clear the reboot flag on provided machines, if it exists.
func (r *RebootFlagClearer) ClearReboot(args params.Entities) (params.ErrorResults, error) {
result := params.ErrorResults{
Results: make([]params.ErrorResult, len(args.Entities)),
}
if len(args.Entities) == 0 {
return result, nil
}
auth, err := r.auth()
if err != nil {
return params.ErrorResults{}, errors.Trace(err)
}
for i, entity := range args.Entities {
tag, err := names.ParseTag(entity.Tag)
if err != nil {
result.Results[i].Error = ServerError(ErrPerm)
continue
}
err = ErrPerm
if auth(tag) {
err = r.clearOneFlag(tag)
}
result.Results[i].Error = ServerError(err)
}
return result, nil
}
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