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http.go
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http.go
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package client
import (
"encoding/base64"
"net/http"
"github.com/coreos/fleet/Godeps/_workspace/src/code.google.com/p/google-api-go-client/googleapi"
"github.com/coreos/fleet/Godeps/_workspace/src/github.com/coreos/go-semver/semver"
"github.com/coreos/fleet/job"
"github.com/coreos/fleet/machine"
"github.com/coreos/fleet/schema"
"github.com/coreos/fleet/unit"
)
func NewHTTPClient(c *http.Client) (API, error) {
svc, err := schema.New(c)
if err != nil {
return nil, err
}
return &HTTPClient{svc: svc}, nil
}
type HTTPClient struct {
svc *schema.Service
//NOTE(bcwaldon): This is only necessary until the API interface
// is fully implemented by HTTPClient
API
}
func (c *HTTPClient) Machines() ([]machine.MachineState, error) {
machines := make([]machine.MachineState, 0)
call := c.svc.Machines.List()
for call != nil {
page, err := call.Do()
if err != nil {
return nil, err
}
machines = append(machines, mapMachinePageToMachineStates(page.Machines)...)
if len(page.NextPageToken) > 0 {
call = c.svc.Machines.List()
call.NextPageToken(page.NextPageToken)
} else {
call = nil
}
}
return machines, nil
}
func mapMachinePageToMachineStates(entities []*schema.Machine) []machine.MachineState {
machines := make([]machine.MachineState, len(entities))
for i, _ := range entities {
me := entities[i]
ms := machine.MachineState{
ID: me.Id,
PublicIP: me.PrimaryIP,
}
ms.Metadata = make(map[string]string, len(me.Metadata))
for k, v := range me.Metadata {
ms.Metadata[k] = v
}
machines[i] = ms
}
return machines
}
func (c *HTTPClient) Jobs() ([]job.Job, error) {
machines, err := c.Machines()
if err != nil {
return nil, err
}
mm := make(map[string]*machine.MachineState, len(machines))
for i, _ := range machines {
m := machines[i]
mm[m.ID] = &m
}
var jobs []job.Job
call := c.svc.Units.List()
for call != nil {
page, err := call.Do()
if err != nil {
return nil, err
}
units, err := mapUnitPageToJobs(page.Units, mm)
if err != nil {
return nil, err
}
jobs = append(jobs, units...)
if len(page.NextPageToken) > 0 {
call = c.svc.Units.List()
call.NextPageToken(page.NextPageToken)
} else {
call = nil
}
}
return jobs, nil
}
func (c *HTTPClient) Job(name string) (*job.Job, error) {
u, err := c.svc.Units.Get(name).Do()
if err != nil {
if is404(err) {
err = nil
}
return nil, err
}
if u == nil {
return nil, nil
}
machines, err := c.Machines()
if err != nil {
return nil, err
}
mm := make(map[string]*machine.MachineState, len(machines))
for i, _ := range machines {
m := machines[i]
mm[m.ID] = &m
}
return mapUnitToJob(u, mm)
}
func mapUnitPageToJobs(entities []*schema.Unit, mm map[string]*machine.MachineState) ([]job.Job, error) {
jobs := make([]job.Job, len(entities))
for i, _ := range entities {
entity := entities[i]
j, err := mapUnitToJob(entity, mm)
if err != nil {
return nil, err
}
if j != nil {
jobs[i] = *j
}
}
return jobs, nil
}
func mapUnitToJob(entity *schema.Unit, mm map[string]*machine.MachineState) (*job.Job, error) {
contents, err := base64.StdEncoding.DecodeString(entity.FileContents)
if err != nil {
return nil, err
}
u, err := unit.NewUnit(string(contents))
if err != nil {
return nil, err
}
js := job.JobState(entity.CurrentState)
j := job.Job{
Name: entity.Name,
State: &js,
Unit: *u,
}
// populate a UnitState object only if the entity
// is actually reporting relevant data
if entity.Systemd != nil {
j.UnitState = &unit.UnitState{
LoadState: entity.Systemd.LoadState,
ActiveState: entity.Systemd.ActiveState,
SubState: entity.Systemd.SubState,
}
if len(entity.Systemd.MachineID) > 0 {
m, ok := mm[entity.Systemd.MachineID]
if ok {
j.UnitState.MachineState = m
} else {
j.UnitState.MachineState = &machine.MachineState{ID: entity.Systemd.MachineID}
}
}
}
return &j, nil
}
func (c *HTTPClient) DestroyJob(name string) error {
req := schema.DeletableUnit{
Name: name,
}
return c.svc.Units.Delete(name, &req).Do()
}
func (c *HTTPClient) CreateJob(j *job.Job) error {
req := schema.DesiredUnitState{
Name: j.Name,
DesiredState: string(job.JobStateInactive),
FileContents: base64.StdEncoding.EncodeToString([]byte(j.Unit.Raw)),
}
return c.svc.Units.Set(j.Name, &req).Do()
}
func (c *HTTPClient) SetJobTargetState(name string, state job.JobState) error {
req := schema.DesiredUnitState{
Name: name,
DesiredState: string(state),
}
return c.svc.Units.Set(name, &req).Do()
}
//NOTE(bcwaldon): This is only temporary until a better version negotiation mechanism is in place
func (c *HTTPClient) LatestVersion() (*semver.Version, error) {
return semver.NewVersion("0.0.0")
}
func encodeUnitContents(u *unit.Unit) string {
return base64.StdEncoding.EncodeToString([]byte(u.Raw))
}
func is404(err error) bool {
googerr, ok := err.(*googleapi.Error)
return ok && googerr.Code == http.StatusNotFound
}