mirror of
https://github.com/go-gitea/gitea.git
synced 2024-12-04 14:46:57 -05:00
b6a95a8cb3
* Dropped unused codekit config * Integrated dynamic and static bindata for public * Ignore public bindata * Add a general generate make task * Integrated flexible public assets into web command * Updated vendoring, added all missiong govendor deps * Made the linter happy with the bindata and dynamic code * Moved public bindata definition to modules directory * Ignoring the new bindata path now * Updated to the new public modules import path * Updated public bindata command and drop the new prefix
520 lines
12 KiB
Go
520 lines
12 KiB
Go
// Copyright 2013, Google Inc. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
// Package fakezk is a pretty complete mock implementation of a
|
|
// Zookeper connection (see go/zk/zk.Conn). All operations
|
|
// work as expected with the exceptions of zk.Conn.ACL and
|
|
// zk.Conn.SetACL. zk.Conn.SetACL will succeed, but it is a noop (and
|
|
// the ACLs won't be respected). zk.Conn.ACL will panic. It is OK to
|
|
// access the connection from multiple goroutines, but the locking is
|
|
// very naive (every operation locks the whole connection).
|
|
package zkhelper
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/json"
|
|
"fmt"
|
|
"io/ioutil"
|
|
"strings"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/ngaut/go-zookeeper/zk"
|
|
)
|
|
|
|
type zconn struct {
|
|
mu sync.Mutex
|
|
root *stat
|
|
zxid int64
|
|
existWatches map[string][]chan zk.Event
|
|
}
|
|
|
|
func (conn *zconn) getZxid() int64 {
|
|
conn.zxid++
|
|
return conn.zxid
|
|
}
|
|
|
|
func (conn *zconn) Seq2Str(seq int64) string {
|
|
return fmt.Sprintf("%0.10d", seq)
|
|
}
|
|
|
|
// NewConn returns a fake zk.Conn implementation. Data is stored in
|
|
// memory, and there's a global connection lock for concurrent access.
|
|
func NewConn() Conn {
|
|
return &zconn{
|
|
root: &stat{
|
|
name: "/",
|
|
children: make(map[string]*stat),
|
|
},
|
|
existWatches: make(map[string][]chan zk.Event)}
|
|
}
|
|
|
|
// NewConnFromFile returns a fake zk.Conn implementation, that is seeded
|
|
// with the json data extracted from the input file.
|
|
func NewConnFromFile(filename string) Conn {
|
|
result := &zconn{
|
|
root: &stat{
|
|
name: "/",
|
|
children: make(map[string]*stat),
|
|
},
|
|
existWatches: make(map[string][]chan zk.Event)}
|
|
data, err := ioutil.ReadFile(filename)
|
|
if err != nil {
|
|
panic(fmt.Errorf("NewConnFromFile failed to read file %v: %v", filename, err))
|
|
}
|
|
values := make(map[string]interface{})
|
|
if err := json.Unmarshal(data, &values); err != nil {
|
|
panic(fmt.Errorf("NewConnFromFile failed to json.Unmarshal file %v: %v", filename, err))
|
|
}
|
|
for k, v := range values {
|
|
jv, err := json.Marshal(v)
|
|
if err != nil {
|
|
panic(fmt.Errorf("NewConnFromFile failed to json.Marshal value %v: %v", k, err))
|
|
}
|
|
|
|
// CreateRecursive will work for a leaf node where the parent
|
|
// doesn't exist, but not for a node in the middle of a tree
|
|
// that already exists. So have to use 'Set' as a backup.
|
|
if _, err := CreateRecursive(result, k, string(jv), 0, nil); err != nil {
|
|
if ZkErrorEqual(err, zk.ErrNodeExists) {
|
|
_, err = result.Set(k, jv, -1)
|
|
}
|
|
if err != nil {
|
|
panic(fmt.Errorf("NewConnFromFile failed to zk.CreateRecursive value %v: %v", k, err))
|
|
}
|
|
}
|
|
}
|
|
return result
|
|
}
|
|
|
|
func (conn *zconn) GetACL(path string) ([]zk.ACL, zk.Stat, error) {
|
|
return nil, nil, nil
|
|
}
|
|
|
|
func (conn *zconn) Get(zkPath string) (data []byte, stat zk.Stat, err error) {
|
|
conn.mu.Lock()
|
|
defer conn.mu.Unlock()
|
|
node, _, rest, err := conn.getNode(zkPath, "get")
|
|
if err != nil {
|
|
return nil, nil, err
|
|
}
|
|
if len(rest) != 0 {
|
|
return nil, nil, zkError(zk.ErrNoNode, "get", zkPath)
|
|
}
|
|
return []byte(node.content), node, nil
|
|
}
|
|
|
|
func (conn *zconn) GetW(zkPath string) (data []byte, stat zk.Stat, watch <-chan zk.Event, err error) {
|
|
conn.mu.Lock()
|
|
defer conn.mu.Unlock()
|
|
node, _, rest, err := conn.getNode(zkPath, "getw")
|
|
if err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
|
|
if len(rest) != 0 {
|
|
return nil, nil, nil, zkError(zk.ErrNoNode, "getw", zkPath)
|
|
}
|
|
c := make(chan zk.Event, 1)
|
|
node.changeWatches = append(node.changeWatches, c)
|
|
return []byte(node.content), node, c, nil
|
|
}
|
|
|
|
func (conn *zconn) Children(zkPath string) (children []string, stat zk.Stat, err error) {
|
|
conn.mu.Lock()
|
|
defer conn.mu.Unlock()
|
|
|
|
//println("Children:", conn.String())
|
|
|
|
node, _, rest, err := conn.getNode(zkPath, "children")
|
|
if err != nil {
|
|
return nil, nil, err
|
|
}
|
|
|
|
if len(rest) != 0 {
|
|
return nil, nil, zkError(zk.ErrNoNode, "children", zkPath)
|
|
}
|
|
for name := range node.children {
|
|
children = append(children, name)
|
|
}
|
|
return children, node, nil
|
|
}
|
|
|
|
func (conn *zconn) ChildrenW(zkPath string) (children []string, stat zk.Stat, watch <-chan zk.Event, err error) {
|
|
conn.mu.Lock()
|
|
defer conn.mu.Unlock()
|
|
|
|
//println("ChildrenW:", conn.String())
|
|
|
|
node, _, rest, err := conn.getNode(zkPath, "childrenw")
|
|
if err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
|
|
if len(rest) != 0 {
|
|
return nil, nil, nil, zkError(zk.ErrNoNode, "childrenw", zkPath)
|
|
}
|
|
c := make(chan zk.Event, 1)
|
|
node.childrenWatches = append(node.childrenWatches, c)
|
|
for name := range node.children {
|
|
children = append(children, name)
|
|
}
|
|
return children, node, c, nil
|
|
}
|
|
|
|
func (conn *zconn) Exists(zkPath string) (exist bool, stat zk.Stat, err error) {
|
|
// FIXME(szopa): if the path is bad, Op will be "get."
|
|
exist = false
|
|
_, stat, err = conn.Get(zkPath)
|
|
if err != nil {
|
|
if ZkErrorEqual(err, zk.ErrNoNode) {
|
|
err = nil
|
|
}
|
|
} else {
|
|
exist = true
|
|
}
|
|
|
|
return exist, stat, err
|
|
}
|
|
|
|
func (conn *zconn) ExistsW(zkPath string) (exist bool, stat zk.Stat, watch <-chan zk.Event, err error) {
|
|
conn.mu.Lock()
|
|
defer conn.mu.Unlock()
|
|
exist = false
|
|
c := make(chan zk.Event, 1)
|
|
node, _, rest, err := conn.getNode(zkPath, "existsw")
|
|
if err != nil {
|
|
return exist, nil, nil, err
|
|
}
|
|
|
|
if len(rest) != 0 {
|
|
watches, ok := conn.existWatches[zkPath]
|
|
if !ok {
|
|
watches = make([]chan zk.Event, 0)
|
|
conn.existWatches[zkPath] = watches
|
|
}
|
|
conn.existWatches[zkPath] = append(watches, c)
|
|
return exist, nil, c, nil
|
|
}
|
|
|
|
exist = true
|
|
node.existWatches = append(node.existWatches, c)
|
|
return exist, node, c, nil
|
|
}
|
|
|
|
func (conn *zconn) Create(zkPath string, value []byte, flags int32, aclv []zk.ACL) (zkPathCreated string, err error) {
|
|
conn.mu.Lock()
|
|
defer conn.mu.Unlock()
|
|
|
|
node, _, rest, err := conn.getNode(zkPath, "create")
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
if len(rest) == 0 {
|
|
return "", zkError(zk.ErrNodeExists, "create", zkPath)
|
|
}
|
|
|
|
if len(rest) > 1 {
|
|
return "", zkError(zk.ErrNoNode, "create", zkPath)
|
|
}
|
|
|
|
zxid := conn.getZxid()
|
|
name := rest[0]
|
|
if (flags & zk.FlagSequence) != 0 {
|
|
sequence := node.nextSequence()
|
|
name += sequence
|
|
zkPath = zkPath + sequence
|
|
}
|
|
|
|
stat := &stat{
|
|
name: name,
|
|
content: string(value),
|
|
children: make(map[string]*stat),
|
|
acl: aclv,
|
|
mtime: time.Now(),
|
|
ctime: time.Now(),
|
|
czxid: zxid,
|
|
mzxid: zxid,
|
|
existWatches: make([]chan zk.Event, 0),
|
|
}
|
|
node.children[name] = stat
|
|
event := zk.Event{
|
|
Type: zk.EventNodeCreated,
|
|
Path: zkPath,
|
|
State: zk.StateConnected,
|
|
}
|
|
if watches, ok := conn.existWatches[zkPath]; ok {
|
|
delete(conn.existWatches, zkPath)
|
|
for _, watch := range watches {
|
|
watch <- event
|
|
|
|
}
|
|
}
|
|
childrenEvent := zk.Event{
|
|
Type: zk.EventNodeChildrenChanged,
|
|
Path: zkPath,
|
|
State: zk.StateConnected,
|
|
}
|
|
for _, watch := range node.childrenWatches {
|
|
watch <- childrenEvent
|
|
close(watch)
|
|
}
|
|
node.childrenWatches = nil
|
|
|
|
node.cversion++
|
|
|
|
return zkPath, nil
|
|
}
|
|
|
|
func (conn *zconn) Set(zkPath string, value []byte, version int32) (stat zk.Stat, err error) {
|
|
conn.mu.Lock()
|
|
defer conn.mu.Unlock()
|
|
|
|
node, _, rest, err := conn.getNode(zkPath, "set")
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if len(rest) != 0 {
|
|
return nil, zkError(zk.ErrNoNode, "set", zkPath)
|
|
}
|
|
|
|
if version != -1 && node.version != int(version) {
|
|
return nil, zkError(zk.ErrBadVersion, "set", zkPath)
|
|
}
|
|
node.content = string(value)
|
|
node.version++
|
|
for _, watch := range node.changeWatches {
|
|
watch <- zk.Event{
|
|
Type: zk.EventNodeDataChanged,
|
|
Path: zkPath,
|
|
State: zk.StateConnected,
|
|
}
|
|
}
|
|
node.changeWatches = nil
|
|
return node, nil
|
|
}
|
|
|
|
func (conn *zconn) Delete(zkPath string, version int32) (err error) {
|
|
conn.mu.Lock()
|
|
defer conn.mu.Unlock()
|
|
|
|
node, parent, rest, err := conn.getNode(zkPath, "delete")
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if len(rest) > 0 {
|
|
return zkError(zk.ErrNoNode, "delete", zkPath)
|
|
}
|
|
if len(node.children) > 0 {
|
|
return zkError(zk.ErrNotEmpty, "delete", zkPath)
|
|
}
|
|
delete(parent.children, node.name)
|
|
event := zk.Event{
|
|
Type: zk.EventNodeDeleted,
|
|
Path: zkPath,
|
|
State: zk.StateConnected,
|
|
}
|
|
for _, watch := range node.existWatches {
|
|
watch <- event
|
|
}
|
|
for _, watch := range node.changeWatches {
|
|
watch <- event
|
|
}
|
|
node.existWatches = nil
|
|
node.changeWatches = nil
|
|
childrenEvent := zk.Event{
|
|
Type: zk.EventNodeChildrenChanged,
|
|
Path: zkPath,
|
|
State: zk.StateConnected}
|
|
|
|
for _, watch := range parent.childrenWatches {
|
|
watch <- childrenEvent
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (conn *zconn) Close() {
|
|
conn.mu.Lock()
|
|
defer conn.mu.Unlock()
|
|
for _, watches := range conn.existWatches {
|
|
for _, c := range watches {
|
|
close(c)
|
|
}
|
|
}
|
|
conn.root.closeAllWatches()
|
|
}
|
|
|
|
/*
|
|
func (conn *zconn) RetryChange(path string, flags int, acl []zk.ACL, changeFunc zk.ChangeFunc) error {
|
|
for {
|
|
oldValue, oldStat, err := conn.Get(path)
|
|
if err != nil && !ZkErrorEqual(err, zk.ErrNoNode) {
|
|
return err
|
|
}
|
|
newValue, err := changeFunc(oldValue, oldStat)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if oldStat == nil {
|
|
_, err := conn.Create(path, newValue, flags, acl)
|
|
if err == nil || !ZkErrorEqual(err, zk.ZNODEEXISTS) {
|
|
return err
|
|
}
|
|
continue
|
|
}
|
|
if newValue == oldValue {
|
|
return nil // Nothing to do.
|
|
}
|
|
_, err = conn.Set(path, newValue, oldStat.Version())
|
|
if err == nil || !ZkErrorEqual(err, zk.ZBADVERSION) && !ZkErrorEqual(err, zk.ErrNoNode) {
|
|
return err
|
|
}
|
|
}
|
|
}
|
|
*/
|
|
|
|
func (conn *zconn) SetACL(zkPath string, aclv []zk.ACL, version int32) (zk.Stat, error) {
|
|
return nil, nil
|
|
}
|
|
|
|
func (conn *zconn) getNode(zkPath string, op string) (node *stat, parent *stat, rest []string, err error) {
|
|
// FIXME(szopa): Make sure the path starts with /.
|
|
parts := strings.Split(zkPath, "/")
|
|
if parts[0] != "" {
|
|
//todo: fix this, error bad arguments
|
|
return nil, nil, nil, zkError(zk.ErrUnknown, op, zkPath)
|
|
}
|
|
elements := parts[1:]
|
|
parent = nil
|
|
current := conn.root
|
|
for i, el := range elements {
|
|
candidateParent := current
|
|
candidate, ok := current.children[el]
|
|
if !ok {
|
|
return current, parent, elements[i:], nil
|
|
}
|
|
current, parent = candidate, candidateParent
|
|
}
|
|
return current, parent, []string{}, nil
|
|
}
|
|
|
|
type ZkError struct {
|
|
Code error
|
|
Op string
|
|
Path string
|
|
}
|
|
|
|
func (ze *ZkError) Error() string {
|
|
return ze.Code.Error()
|
|
}
|
|
|
|
// zkError creates an appropriate error return from
|
|
// a ZooKeeper status
|
|
func zkError(code error, op, path string) error {
|
|
return &ZkError{
|
|
Op: op,
|
|
Code: code,
|
|
Path: path,
|
|
}
|
|
}
|
|
|
|
type stat struct {
|
|
name string
|
|
content string
|
|
children map[string]*stat
|
|
acl []zk.ACL
|
|
mtime time.Time
|
|
ctime time.Time
|
|
czxid int64
|
|
mzxid int64
|
|
pzxid int64
|
|
version int
|
|
cversion int
|
|
aversion int
|
|
|
|
sequence int
|
|
|
|
existWatches []chan zk.Event
|
|
changeWatches []chan zk.Event
|
|
childrenWatches []chan zk.Event
|
|
}
|
|
|
|
func (st stat) closeAllWatches() {
|
|
for _, c := range st.existWatches {
|
|
close(c)
|
|
}
|
|
for _, c := range st.changeWatches {
|
|
close(c)
|
|
}
|
|
for _, c := range st.childrenWatches {
|
|
close(c)
|
|
}
|
|
for _, child := range st.children {
|
|
child.closeAllWatches()
|
|
}
|
|
}
|
|
|
|
func (st stat) Czxid() int64 {
|
|
return st.czxid
|
|
}
|
|
func (st stat) Mzxid() int64 {
|
|
return st.mzxid
|
|
}
|
|
func (st stat) CTime() time.Time {
|
|
return st.ctime
|
|
}
|
|
func (st stat) MTime() time.Time {
|
|
return st.mtime
|
|
}
|
|
func (st stat) Version() int {
|
|
return st.version
|
|
}
|
|
func (st stat) CVersion() int {
|
|
return st.cversion
|
|
}
|
|
func (st stat) AVersion() int {
|
|
return st.aversion
|
|
}
|
|
func (st stat) EphemeralOwner() int64 {
|
|
return 0
|
|
}
|
|
|
|
func (st stat) DataLength() int {
|
|
return len(st.content)
|
|
}
|
|
|
|
func (st stat) NumChildren() int {
|
|
return len(st.children)
|
|
}
|
|
|
|
func (st stat) Pzxid() int64 {
|
|
return st.pzxid
|
|
}
|
|
|
|
func (st *stat) nextSequence() string {
|
|
st.sequence++
|
|
return fmt.Sprintf("%010d", st.sequence)
|
|
}
|
|
|
|
func (st stat) fprintRecursive(level int, buf *bytes.Buffer) {
|
|
start := strings.Repeat(" ", level)
|
|
fmt.Fprintf(buf, "%v-%v:\n", start, st.name)
|
|
if st.content != "" {
|
|
fmt.Fprintf(buf, "%v content: %q\n\n", start, st.content)
|
|
}
|
|
if len(st.children) > 0 {
|
|
for _, child := range st.children {
|
|
child.fprintRecursive(level+1, buf)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (conn *zconn) String() string {
|
|
b := new(bytes.Buffer)
|
|
conn.root.fprintRecursive(0, b)
|
|
return b.String()
|
|
}
|