func (r *EtcdRegistry) storeOrGetUnitFile(u unit.UnitFile) (err error) {
um := unitModel{
Raw: u.String(),
}
val, err := marshal(um)
if err != nil {
return err
}
key := r.hashedUnitPath(u.Hash())
opts := &etcd.SetOptions{
PrevExist: etcd.PrevNoExist,
}
start := time.Now()
_, err = r.kAPI.Set(context.Background(), key, val, opts)
// unit is already stored
if isEtcdError(err, etcd.ErrorCodeNodeExist) {
// TODO(jonboulle): verify more here?
err = nil
}
if err != nil {
metrics.ReportRegistryOpFailure(metrics.Set)
return
}
metrics.ReportRegistryOpSuccess(metrics.Set, start)
return
}
// getUnitByHash retrieves from the Registry the Unit associated with the given Hash
func (r *EtcdRegistry) getUnitByHash(hash unit.Hash) *unit.UnitFile {
key := r.hashedUnitPath(hash)
opts := &etcd.GetOptions{
Recursive: true,
}
start := time.Now()
resp, err := r.kAPI.Get(context.Background(), key, opts)
if err != nil {
if isEtcdError(err, etcd.ErrorCodeKeyNotFound) {
err = nil
}
metrics.ReportRegistryOpFailure(metrics.Get)
return nil
}
metrics.ReportRegistryOpSuccess(metrics.Get, start)
return r.unitFromEtcdNode(hash, resp.Node)
}
// getAllUnitsHashMap retrieves from the Registry all Units and returns a map of hash to UnitFile
func (r *EtcdRegistry) getAllUnitsHashMap() (map[string]*unit.UnitFile, error) {
key := r.prefixed(unitPrefix)
opts := &etcd.GetOptions{
Recursive: true,
Quorum: true,
}
hashToUnit := map[string]*unit.UnitFile{}
start := time.Now()
resp, err := r.kAPI.Get(context.Background(), key, opts)
if err != nil {
metrics.ReportRegistryOpFailure(metrics.GetAll)
return nil, err
}
metrics.ReportRegistryOpSuccess(metrics.GetAll, start)
for _, node := range resp.Node.Nodes {
parts := strings.Split(node.Key, "/")
if len(parts) == 0 {
log.Errorf("key '%v' doesn't have enough parts", node.Key)
continue
}
stringHash := parts[len(parts)-1]
hash, err := unit.HashFromHexString(stringHash)
if err != nil {
log.Errorf("failed to get Hash for key '%v' with stringHash '%v': %v", node.Key, stringHash, err)
continue
}
unit := r.unitFromEtcdNode(hash, node)
if unit == nil {
continue
}
hashToUnit[stringHash] = unit
}
return hashToUnit, nil
}