/*
LockedBy will return whether this KeyLock is actually locked in the database and who holds it now.
*/
func (self *KeyLock) LockedBy(c GAEContext) (isLocked bool, lockedBy key.Key, err error) {
existingLock := &KeyLock{Id: self.Id}
if err = gae.GetById(c, existingLock); err != nil {
if _, ok := err.(gae.ErrNoSuchEntity); ok {
err = nil
return
} else {
return
}
}
isLocked = true
lockedBy = existingLock.Entity
return
}
/*
Unlock will unlock this KeyLock and make its Id (and the value it is based on) available for other locks.
*/
func (self *KeyLock) Unlock(c GAEContext) (err error) {
snapshot := *self
return c.Transaction(func(c GAEContext) (err error) {
*self = snapshot
existingLock := &KeyLock{Id: self.Id}
if err = gae.GetById(c, existingLock); err != nil {
return
}
if existingLock.Entity != self.Entity {
err = errors.Errorf("%+v doesn't own %v", self, self.Entity)
return
}
err = gae.Del(c, existingLock)
return
}, false)
}
func testGet(c gaecontext.HTTPContext) {
gae.DelAll(c, &Ts{})
k, err := key.For(&Ts{}, "", 0, "")
if err != nil {
panic(err)
}
t := &Ts{
Id: k,
Name: "the t",
Age: 12,
}
if err := gae.Put(c, t); err != nil {
panic(err)
}
wantedProcesses := []string{"BeforeCreate", "BeforeSave", "AfterCreate", "AfterSave"}
if !reflect.DeepEqual(t.Processes, wantedProcesses) {
panic("wrong processes!")
}
if t.Id.IntID() == 0 {
panic("shouldn't be zero")
}
t2 := &Ts{Id: t.Id}
if err := gae.GetById(c, t2); err != nil {
panic(err)
}
if !t.Equal(t2) {
panic("1 should be equal")
}
wantedProcesses = []string{"BeforeCreate", "BeforeSave", "AfterLoad"}
if !reflect.DeepEqual(t2.Processes, wantedProcesses) {
panic(fmt.Sprintf("wrong processes! wanted %+v but got %+v", wantedProcesses, t2.Processes))
}
t2.Age = 13
if err := gae.Put(c, t2); err != nil {
panic(err)
}
wantedProcesses = append(wantedProcesses, "BeforeUpdate", "BeforeSave", "AfterUpdate", "AfterSave")
if !reflect.DeepEqual(t2.Processes, wantedProcesses) {
panic("wrong processes!")
}
if err := gae.Del(c, t2); err != nil {
panic(err)
}
if !reflect.DeepEqual(t2.Processes, wantedProcesses) {
panic(fmt.Errorf("got %+v, wanted %+v", t2.Processes, wantedProcesses))
}
}
/*
Lock will try to lock this KeyLock and make its Id (and the value it is based on) unavailable for other locks.
*/
func (self *KeyLock) Lock(c GAEContext) error {
snapshot := *self
return c.Transaction(func(c GAEContext) (err error) {
*self = snapshot
existingLock := &KeyLock{Id: self.Id}
err = gae.GetById(c, existingLock)
if _, ok := err.(gae.ErrNoSuchEntity); ok {
err = nil
} else if err == nil {
err = ErrLockTaken{
Key: self.Id,
Entity: existingLock.Entity,
Stack: utils.Stack(),
}
}
if err != nil {
return
}
err = gae.Put(c, self)
return
}, false)
}
func testMemcacheMulti(c gaecontext.HTTPContext) {
doTest1 := func(c gaecontext.HTTPContext) (ts1, ts2 *MemMulTS) {
gae.DelAll(c, &MemMulTS{})
var err error
ts1 = &MemMulTS{}
if ts1.Id, err = key.For(ts1, "", 0, ""); err != nil {
panic(err)
}
ts2 = &MemMulTS{}
if ts2.Id, err = key.For(ts2, "", 0, ""); err != nil {
panic(err)
}
if err := gae.Put(c, ts1); err != nil {
panic(err)
}
if err := gae.Put(c, ts2); err != nil {
panic(err)
}
return
}
doTest2 := func(c gaecontext.HTTPContext, ts1, ts2 *MemMulTS) {
load1 := &MemMulTS{}
load2 := &MemMulTS{}
load3 := &MemMulTS{}
fakeId, err := key.New("MemMulTS", "hehu", 0, "")
if err != nil {
return
}
fgen := func(id key.Key) func() (result interface{}, err error) {
return func() (result interface{}, err error) {
ts := &MemMulTS{
Id: id,
}
if err = gae.GetById(c, ts); err != nil {
if _, ok := err.(gae.ErrNoSuchEntity); ok {
err = nil
return
}
return
}
result = ts
return
}
}
if err := memcache.MemoizeMulti(c, []string{
ts1.Id.Encode(),
ts2.Id.Encode(),
fakeId.Encode(),
}, []interface{}{
load1,
load2,
load3,
}, []func() (interface{}, error){
fgen(ts1.Id),
fgen(ts2.Id),
fgen(fakeId),
}); err != nil {
if err[0] != nil || err[1] != nil || err[2] != memcache.ErrCacheMiss {
for _, serr := range err {
c.Infof("Error: %v", serr)
}
panic(err)
}
}
if load1.Id != ts1.Id {
panic(fmt.Errorf("wrong id, wanted %v but got %v", ts1.Id, load1.Id))
}
if load2.Id != ts2.Id {
panic("wrong id")
}
if load3.Id != "" {
panic("wrong id")
}
load1 = &MemMulTS{}
load2 = &MemMulTS{}
load3 = &MemMulTS{}
if err := memcache.MemoizeMulti(c, []string{
ts1.Id.Encode(),
ts2.Id.Encode(),
fakeId.Encode(),
}, []interface{}{
load1,
load2,
load3,
}, []func() (interface{}, error){
fgen(ts1.Id),
fgen(ts2.Id),
fgen(fakeId),
}); err != nil {
if err[0] != nil || err[1] != nil || err[2] != memcache.ErrCacheMiss {
panic(err)
}
}
if load1.Id != ts1.Id {
panic(fmt.Errorf("wrong id, wanted %v but got %v", ts1.Id, load1.Id))
}
if load2.Id != ts2.Id {
panic("wrong id")
}
if load3.Id != "" {
panic("wrong id")
}
}
ts1, ts2 := doTest1(c)
doTest2(c, ts1, ts2)
ts1, ts2 = doTest1(c)
c.Transaction(func(c gaecontext.HTTPContext) (err error) {
doTest2(c, ts1, ts2)
return
}, true)
}
func testMemcacheDeletion(c gaecontext.HTTPContext) {
t1 := &Ts{}
parentKey, err := key.For(t1, "parent", 0, "")
if err != nil {
panic(err)
}
t1.Id, err = key.For(t1, "", 0, parentKey)
if err != nil {
panic(err)
}
t1.Name = "hej"
if err := gae.Put(c, t1); err != nil {
panic(err)
}
t2 := &Ts{Id: t1.Id}
if err := gae.GetById(c, t2); err != nil {
panic(err)
}
if t2.Name != "hej" {
panic("wrong name")
}
time.Sleep(time.Second)
found := []Ts{}
if err := findTsByName(c, &found, "hej"); err != nil {
panic(err)
}
if len(found) != 1 {
panic("wrong len")
}
if found[0].Name != "hej" {
panic("wrong name")
}
found = []Ts{}
if err := findTsByAncestorAndName(c, &found, parentKey, "hej"); err != nil {
panic(err)
}
if len(found) != 1 {
panic("wrong len")
}
if found[0].Name != "hej" {
panic("wrong name")
}
t1.Name = "hehu"
if err := gae.Put(c, t1); err != nil {
panic(err)
}
time.Sleep(time.Second)
found = []Ts{}
if err := findTsByName(c, &found, "hej"); err != nil {
panic(err)
}
if len(found) != 0 {
panic("wrong len")
}
found = []Ts{}
if err := findTsByAncestorAndName(c, &found, parentKey, "hej"); err != nil {
panic(err)
}
if len(found) != 0 {
panic("wrong len")
}
found = []Ts{}
if err := findTsByName(c, &found, "hehu"); err != nil {
panic(err)
}
if len(found) != 1 {
panic("wrong len")
}
if found[0].Name != "hehu" {
panic("wrong name")
}
found = []Ts{}
if err := findTsByAncestorAndName(c, &found, parentKey, "hehu"); err != nil {
panic(err)
}
if len(found) != 1 {
panic("wrong len")
}
if found[0].Name != "hehu" {
panic("wrong name")
}
if err := c.Transaction(func(c gaecontext.HTTPContext) (err error) {
t1.Name = "blapp"
err = gae.Put(c, t1)
return
}, false); err != nil {
panic(err)
}
time.Sleep(time.Second)
found = []Ts{}
if err := findTsByName(c, &found, "hehu"); err != nil {
panic(err)
}
if len(found) != 0 {
panic("wrong len")
}
found = []Ts{}
if err := findTsByAncestorAndName(c, &found, parentKey, "hehu"); err != nil {
panic(err)
}
if len(found) != 0 {
panic("wrong len")
}
found = []Ts{}
if err := findTsByName(c, &found, "blapp"); err != nil {
panic(err)
}
if len(found) != 1 {
panic("wrong len")
}
if found[0].Name != "blapp" {
panic("wrong name")
}
found = []Ts{}
if err := findTsByAncestorAndName(c, &found, parentKey, "blapp"); err != nil {
panic(err)
}
if len(found) != 1 {
panic("wrong len")
}
if found[0].Name != "blapp" {
panic("wrong name")
}
}