[VOL-4291] Rw-core updates for gRPC migration
Change-Id: I8d5a554409115b29318089671ca4e1ab3fa98810
diff --git a/vendor/github.com/coreos/etcd/client/members.go b/vendor/github.com/coreos/etcd/client/members.go
new file mode 100644
index 0000000..aafa3d1
--- /dev/null
+++ b/vendor/github.com/coreos/etcd/client/members.go
@@ -0,0 +1,303 @@
+// Copyright 2015 The etcd Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package client
+
+import (
+ "bytes"
+ "context"
+ "encoding/json"
+ "fmt"
+ "net/http"
+ "net/url"
+ "path"
+
+ "github.com/coreos/etcd/pkg/types"
+)
+
+var (
+ defaultV2MembersPrefix = "/v2/members"
+ defaultLeaderSuffix = "/leader"
+)
+
+type Member struct {
+ // ID is the unique identifier of this Member.
+ ID string `json:"id"`
+
+ // Name is a human-readable, non-unique identifier of this Member.
+ Name string `json:"name"`
+
+ // PeerURLs represents the HTTP(S) endpoints this Member uses to
+ // participate in etcd's consensus protocol.
+ PeerURLs []string `json:"peerURLs"`
+
+ // ClientURLs represents the HTTP(S) endpoints on which this Member
+ // serves its client-facing APIs.
+ ClientURLs []string `json:"clientURLs"`
+}
+
+type memberCollection []Member
+
+func (c *memberCollection) UnmarshalJSON(data []byte) error {
+ d := struct {
+ Members []Member
+ }{}
+
+ if err := json.Unmarshal(data, &d); err != nil {
+ return err
+ }
+
+ if d.Members == nil {
+ *c = make([]Member, 0)
+ return nil
+ }
+
+ *c = d.Members
+ return nil
+}
+
+type memberCreateOrUpdateRequest struct {
+ PeerURLs types.URLs
+}
+
+func (m *memberCreateOrUpdateRequest) MarshalJSON() ([]byte, error) {
+ s := struct {
+ PeerURLs []string `json:"peerURLs"`
+ }{
+ PeerURLs: make([]string, len(m.PeerURLs)),
+ }
+
+ for i, u := range m.PeerURLs {
+ s.PeerURLs[i] = u.String()
+ }
+
+ return json.Marshal(&s)
+}
+
+// NewMembersAPI constructs a new MembersAPI that uses HTTP to
+// interact with etcd's membership API.
+func NewMembersAPI(c Client) MembersAPI {
+ return &httpMembersAPI{
+ client: c,
+ }
+}
+
+type MembersAPI interface {
+ // List enumerates the current cluster membership.
+ List(ctx context.Context) ([]Member, error)
+
+ // Add instructs etcd to accept a new Member into the cluster.
+ Add(ctx context.Context, peerURL string) (*Member, error)
+
+ // Remove demotes an existing Member out of the cluster.
+ Remove(ctx context.Context, mID string) error
+
+ // Update instructs etcd to update an existing Member in the cluster.
+ Update(ctx context.Context, mID string, peerURLs []string) error
+
+ // Leader gets current leader of the cluster
+ Leader(ctx context.Context) (*Member, error)
+}
+
+type httpMembersAPI struct {
+ client httpClient
+}
+
+func (m *httpMembersAPI) List(ctx context.Context) ([]Member, error) {
+ req := &membersAPIActionList{}
+ resp, body, err := m.client.Do(ctx, req)
+ if err != nil {
+ return nil, err
+ }
+
+ if err := assertStatusCode(resp.StatusCode, http.StatusOK); err != nil {
+ return nil, err
+ }
+
+ var mCollection memberCollection
+ if err := json.Unmarshal(body, &mCollection); err != nil {
+ return nil, err
+ }
+
+ return []Member(mCollection), nil
+}
+
+func (m *httpMembersAPI) Add(ctx context.Context, peerURL string) (*Member, error) {
+ urls, err := types.NewURLs([]string{peerURL})
+ if err != nil {
+ return nil, err
+ }
+
+ req := &membersAPIActionAdd{peerURLs: urls}
+ resp, body, err := m.client.Do(ctx, req)
+ if err != nil {
+ return nil, err
+ }
+
+ if err := assertStatusCode(resp.StatusCode, http.StatusCreated, http.StatusConflict); err != nil {
+ return nil, err
+ }
+
+ if resp.StatusCode != http.StatusCreated {
+ var merr membersError
+ if err := json.Unmarshal(body, &merr); err != nil {
+ return nil, err
+ }
+ return nil, merr
+ }
+
+ var memb Member
+ if err := json.Unmarshal(body, &memb); err != nil {
+ return nil, err
+ }
+
+ return &memb, nil
+}
+
+func (m *httpMembersAPI) Update(ctx context.Context, memberID string, peerURLs []string) error {
+ urls, err := types.NewURLs(peerURLs)
+ if err != nil {
+ return err
+ }
+
+ req := &membersAPIActionUpdate{peerURLs: urls, memberID: memberID}
+ resp, body, err := m.client.Do(ctx, req)
+ if err != nil {
+ return err
+ }
+
+ if err := assertStatusCode(resp.StatusCode, http.StatusNoContent, http.StatusNotFound, http.StatusConflict); err != nil {
+ return err
+ }
+
+ if resp.StatusCode != http.StatusNoContent {
+ var merr membersError
+ if err := json.Unmarshal(body, &merr); err != nil {
+ return err
+ }
+ return merr
+ }
+
+ return nil
+}
+
+func (m *httpMembersAPI) Remove(ctx context.Context, memberID string) error {
+ req := &membersAPIActionRemove{memberID: memberID}
+ resp, _, err := m.client.Do(ctx, req)
+ if err != nil {
+ return err
+ }
+
+ return assertStatusCode(resp.StatusCode, http.StatusNoContent, http.StatusGone)
+}
+
+func (m *httpMembersAPI) Leader(ctx context.Context) (*Member, error) {
+ req := &membersAPIActionLeader{}
+ resp, body, err := m.client.Do(ctx, req)
+ if err != nil {
+ return nil, err
+ }
+
+ if err := assertStatusCode(resp.StatusCode, http.StatusOK); err != nil {
+ return nil, err
+ }
+
+ var leader Member
+ if err := json.Unmarshal(body, &leader); err != nil {
+ return nil, err
+ }
+
+ return &leader, nil
+}
+
+type membersAPIActionList struct{}
+
+func (l *membersAPIActionList) HTTPRequest(ep url.URL) *http.Request {
+ u := v2MembersURL(ep)
+ req, _ := http.NewRequest("GET", u.String(), nil)
+ return req
+}
+
+type membersAPIActionRemove struct {
+ memberID string
+}
+
+func (d *membersAPIActionRemove) HTTPRequest(ep url.URL) *http.Request {
+ u := v2MembersURL(ep)
+ u.Path = path.Join(u.Path, d.memberID)
+ req, _ := http.NewRequest("DELETE", u.String(), nil)
+ return req
+}
+
+type membersAPIActionAdd struct {
+ peerURLs types.URLs
+}
+
+func (a *membersAPIActionAdd) HTTPRequest(ep url.URL) *http.Request {
+ u := v2MembersURL(ep)
+ m := memberCreateOrUpdateRequest{PeerURLs: a.peerURLs}
+ b, _ := json.Marshal(&m)
+ req, _ := http.NewRequest("POST", u.String(), bytes.NewReader(b))
+ req.Header.Set("Content-Type", "application/json")
+ return req
+}
+
+type membersAPIActionUpdate struct {
+ memberID string
+ peerURLs types.URLs
+}
+
+func (a *membersAPIActionUpdate) HTTPRequest(ep url.URL) *http.Request {
+ u := v2MembersURL(ep)
+ m := memberCreateOrUpdateRequest{PeerURLs: a.peerURLs}
+ u.Path = path.Join(u.Path, a.memberID)
+ b, _ := json.Marshal(&m)
+ req, _ := http.NewRequest("PUT", u.String(), bytes.NewReader(b))
+ req.Header.Set("Content-Type", "application/json")
+ return req
+}
+
+func assertStatusCode(got int, want ...int) (err error) {
+ for _, w := range want {
+ if w == got {
+ return nil
+ }
+ }
+ return fmt.Errorf("unexpected status code %d", got)
+}
+
+type membersAPIActionLeader struct{}
+
+func (l *membersAPIActionLeader) HTTPRequest(ep url.URL) *http.Request {
+ u := v2MembersURL(ep)
+ u.Path = path.Join(u.Path, defaultLeaderSuffix)
+ req, _ := http.NewRequest("GET", u.String(), nil)
+ return req
+}
+
+// v2MembersURL add the necessary path to the provided endpoint
+// to route requests to the default v2 members API.
+func v2MembersURL(ep url.URL) *url.URL {
+ ep.Path = path.Join(ep.Path, defaultV2MembersPrefix)
+ return &ep
+}
+
+type membersError struct {
+ Message string `json:"message"`
+ Code int `json:"-"`
+}
+
+func (e membersError) Error() string {
+ return e.Message
+}