func (c *Client) GetBackend(bk engine.BackendKey) (*engine.Backend, error) {
response, err := c.Get(c.endpoint("backends", bk.Id), url.Values{})
if err != nil {
return nil, err
}
return engine.BackendFromJSON(response)
}
func (n *ng) parseBackends(node *etcd.Node, skipServers ...bool) ([]engine.BackendSpec, error) {
backendSpecs := make([]engine.BackendSpec, len(node.Nodes))
for idx, node := range node.Nodes {
backendId := suffix(node.Key)
for _, node := range node.Nodes {
switch suffix(node.Key) {
case "backend":
backend, err := engine.BackendFromJSON([]byte(node.Value), backendId)
if err != nil {
return nil, err
}
backendSpecs[idx].Backend = *backend
case "servers":
if len(skipServers) == 1 && skipServers[0] {
break
}
servers := make([]engine.Server, len(node.Nodes))
for idx, node := range node.Nodes {
serverId := suffix(node.Key)
server, err := engine.ServerFromJSON([]byte(node.Value), serverId)
if err != nil {
return nil, err
}
servers[idx] = *server
}
backendSpecs[idx].Servers = servers
}
}
if backendSpecs[idx].Backend.Id != backendId {
return nil, fmt.Errorf("Backend %s parameters missing", backendId)
}
}
return backendSpecs, nil
}
func (n *ng) GetBackend(key engine.BackendKey) (*engine.Backend, error) {
backendKey := n.path("backends", key.Id, "backend")
bytes, err := n.getVal(backendKey)
if err != nil {
return nil, err
}
return engine.BackendFromJSON([]byte(bytes), key.Id)
}
func parseBackendPack(v []byte) (*engine.Backend, error) {
var bp *backendReadPack
if err := json.Unmarshal(v, &bp); err != nil {
return nil, err
}
if bp == nil || len(bp.Backend) == 0 {
return nil, &scroll.MissingFieldError{Field: "Backend"}
}
return engine.BackendFromJSON(bp.Backend)
}
func (n *ng) parseBackends(keyValues []*mvccpb.KeyValue, skipServers ...bool) ([]engine.BackendSpec, error) {
backendSpecs := []engine.BackendSpec{}
for _, keyValue := range keyValues {
if backendIds := backendIdRegex.FindStringSubmatch(string(keyValue.Key)); len(backendIds) == 2 {
backendId := backendIds[1]
backend, err := engine.BackendFromJSON([]byte(keyValue.Value), backendId)
if err != nil {
return nil, err
}
backendSpec := engine.BackendSpec{
Backend: *backend,
}
if len(skipServers) != 1 || !skipServers[0] {
//get all keys under this frontend
subKeyValues := filterByPrefix(keyValues, string(keyValue.Key)) //Get all keys below this frontend "/vulcand/frontends/foo/*"
servers := []engine.Server{}
for _, subKeyValue := range subKeyValues {
if serverId := suffix(string(subKeyValue.Key)); suffix(prefix(string(subKeyValue.Key))) == "servers" {
server, err := engine.ServerFromJSON([]byte(subKeyValue.Value), serverId)
if err != nil {
return nil, err
}
servers = append(servers, *server)
}
}
backendSpec.Servers = servers
}
backendSpecs = append(backendSpecs, backendSpec)
}
}
return backendSpecs, nil
}