func (dl directoryLayer) Exists(rt fdb.ReadTransactor, path []string) (bool, error) {
r, e := rt.ReadTransact(func(rtr fdb.ReadTransaction) (interface{}, error) {
if e := dl.checkVersion(rtr, nil); e != nil {
return false, e
}
node := dl.find(rtr, path).prefetchMetadata(rtr)
if !node.exists() {
return false, nil
}
if node.isInPartition(nil, false) {
nc, e := node.getContents(dl, nil)
if e != nil {
return false, e
}
return nc.Exists(rtr, node.getPartitionSubpath())
}
return true, nil
})
if e != nil {
return false, e
}
return r.(bool), nil
}
func (dl directoryLayer) List(rt fdb.ReadTransactor, path []string) ([]string, error) {
r, e := rt.ReadTransact(func(rtr fdb.ReadTransaction) (interface{}, error) {
if e := dl.checkVersion(rtr, nil); e != nil {
return nil, e
}
node := dl.find(rtr, path).prefetchMetadata(rtr)
if !node.exists() {
return nil, errors.New("the directory does not exist")
}
if node.isInPartition(nil, true) {
nc, e := node.getContents(dl, nil)
if e != nil {
return nil, e
}
return nc.List(rtr, node.getPartitionSubpath())
}
return dl.subdirNames(rtr, node.subspace)
})
if e != nil {
return nil, e
}
return r.([]string), nil
}
func (dl directoryLayer) Open(rt fdb.ReadTransactor, path []string, layer []byte) (DirectorySubspace, error) {
r, e := rt.ReadTransact(func(rtr fdb.ReadTransaction) (interface{}, error) {
return dl.createOrOpen(rtr, nil, path, layer, nil, false, true)
})
if e != nil {
return nil, e
}
return r.(DirectorySubspace), nil
}
func (sm *StackMachine) processInst(idx int, inst tuple.Tuple) {
defer func() {
if r := recover(); r != nil {
switch r := r.(type) {
case fdb.Error:
sm.store(idx, []byte(tuple.Tuple{[]byte("ERROR"), []byte(fmt.Sprintf("%d", r.Code))}.Pack()))
default:
panic(r)
}
}
}()
var e error
op := inst[0].(string)
if sm.verbose {
fmt.Printf("%d. Instruction is %s (%v)\n", idx, op, sm.prefix)
fmt.Printf("Stack from [")
sm.dumpStack()
fmt.Printf(" ]\n")
}
var t fdb.Transactor
var rt fdb.ReadTransactor
var isDB bool
switch {
case strings.HasSuffix(op, "_SNAPSHOT"):
rt = sm.tr.Snapshot()
op = op[:len(op)-9]
case strings.HasSuffix(op, "_DATABASE"):
t = db
rt = db
op = op[:len(op)-9]
isDB = true
default:
t = sm.tr
rt = sm.tr
}
switch {
case op == "PUSH":
sm.store(idx, inst[1])
case op == "DUP":
entry := sm.stack[len(sm.stack)-1]
sm.store(entry.idx, entry.item)
case op == "EMPTY_STACK":
sm.stack = []stackEntry{}
sm.stack = make([]stackEntry, 0)
case op == "SWAP":
idx := sm.waitAndPop().item.(int64)
sm.stack[len(sm.stack)-1], sm.stack[len(sm.stack)-1-int(idx)] = sm.stack[len(sm.stack)-1-int(idx)], sm.stack[len(sm.stack)-1]
case op == "POP":
sm.stack = sm.stack[:len(sm.stack)-1]
case op == "SUB":
sm.store(idx, sm.waitAndPop().item.(int64)-sm.waitAndPop().item.(int64))
case op == "NEW_TRANSACTION":
sm.tr, e = db.CreateTransaction()
if e != nil {
panic(e)
}
case op == "ON_ERROR":
sm.store(idx, sm.tr.OnError(fdb.Error{int(sm.waitAndPop().item.(int64))}))
case op == "GET_READ_VERSION":
_, e = rt.ReadTransact(func(rtr fdb.ReadTransaction) (interface{}, error) {
sm.lastVersion = rtr.GetReadVersion().MustGet()
sm.store(idx, []byte("GOT_READ_VERSION"))
return nil, nil
})
if e != nil {
panic(e)
}
case op == "SET":
sm.executeMutation(t, func(tr fdb.Transaction) (interface{}, error) {
tr.Set(fdb.Key(sm.waitAndPop().item.([]byte)), sm.waitAndPop().item.([]byte))
return nil, nil
}, isDB, idx)
case op == "LOG_STACK":
prefix := sm.waitAndPop().item.([]byte)
for i := len(sm.stack) - 1; i >= 0; i-- {
if i%100 == 0 {
sm.tr.Commit().MustGet()
}
el := sm.waitAndPop()
var keyt tuple.Tuple
keyt = append(keyt, int64(i))
keyt = append(keyt, int64(el.idx))
pk := append(prefix, keyt.Pack()...)
var valt tuple.Tuple
valt = append(valt, el.item)
pv := valt.Pack()
vl := 40000
if len(pv) < vl {
vl = len(pv)
}
sm.tr.Set(fdb.Key(pk), pv[:vl])
}
sm.tr.Commit().MustGet()
case op == "GET":
_, e = rt.ReadTransact(func(rtr fdb.ReadTransaction) (interface{}, error) {
sm.store(idx, rtr.Get(fdb.Key(sm.waitAndPop().item.([]byte))))
return nil, nil
})
if e != nil {
panic(e)
}
case op == "COMMIT":
sm.store(idx, sm.tr.Commit())
case op == "RESET":
sm.tr.Reset()
case op == "CLEAR":
sm.executeMutation(t, func(tr fdb.Transaction) (interface{}, error) {
tr.Clear(fdb.Key(sm.waitAndPop().item.([]byte)))
return nil, nil
}, isDB, idx)
case op == "SET_READ_VERSION":
sm.tr.SetReadVersion(sm.lastVersion)
case op == "WAIT_FUTURE":
entry := sm.waitAndPop()
sm.store(entry.idx, entry.item)
case op == "GET_COMMITTED_VERSION":
sm.lastVersion, e = sm.tr.GetCommittedVersion()
if e != nil {
panic(e)
}
sm.store(idx, []byte("GOT_COMMITTED_VERSION"))
case op == "GET_KEY":
sel := sm.popSelector()
_, e = rt.ReadTransact(func(rtr fdb.ReadTransaction) (interface{}, error) {
sm.store(idx, rtr.GetKey(sel))
return nil, nil
})
if e != nil {
panic(e)
}
case strings.HasPrefix(op, "GET_RANGE"):
var r fdb.Range
switch op[9:] {
case "_STARTS_WITH":
r = sm.popPrefixRange()
case "_SELECTOR":
r = fdb.SelectorRange{sm.popSelector(), sm.popSelector()}
case "":
r = sm.popKeyRange()
}
ro := sm.popRangeOptions()
_, e = rt.ReadTransact(func(rtr fdb.ReadTransaction) (interface{}, error) {
sm.pushRange(idx, rtr.GetRange(r, ro).GetSliceOrPanic())
return nil, nil
})
if e != nil {
panic(e)
}
case strings.HasPrefix(op, "CLEAR_RANGE"):
var er fdb.ExactRange
switch op[11:] {
case "_STARTS_WITH":
er = sm.popPrefixRange()
case "":
er = sm.popKeyRange()
}
sm.executeMutation(t, func(tr fdb.Transaction) (interface{}, error) {
tr.ClearRange(er)
return nil, nil
}, isDB, idx)
case op == "TUPLE_PACK":
var t tuple.Tuple
count := sm.waitAndPop().item.(int64)
for i := 0; i < int(count); i++ {
t = append(t, sm.waitAndPop().item)
}
sm.store(idx, []byte(t.Pack()))
case op == "TUPLE_UNPACK":
t, e := tuple.Unpack(fdb.Key(sm.waitAndPop().item.([]byte)))
if e != nil {
panic(e)
}
for _, el := range t {
sm.store(idx, []byte(tuple.Tuple{el}.Pack()))
}
case op == "TUPLE_RANGE":
var t tuple.Tuple
count := sm.waitAndPop().item.(int64)
for i := 0; i < int(count); i++ {
t = append(t, sm.waitAndPop().item)
}
bk, ek := t.FDBRangeKeys()
sm.store(idx, []byte(bk.FDBKey()))
sm.store(idx, []byte(ek.FDBKey()))
case op == "START_THREAD":
newsm := newStackMachine(sm.waitAndPop().item.([]byte), verbose, sm.de)
sm.threads.Add(1)
go func() {
newsm.Run()
sm.threads.Done()
}()
case op == "WAIT_EMPTY":
prefix := sm.waitAndPop().item.([]byte)
er, e := fdb.PrefixRange(prefix)
if e != nil {
panic(e)
}
db.Transact(func(tr fdb.Transaction) (interface{}, error) {
v := tr.GetRange(er, fdb.RangeOptions{}).GetSliceOrPanic()
if len(v) != 0 {
panic(fdb.Error{1020})
}
return nil, nil
})
sm.store(idx, []byte("WAITED_FOR_EMPTY"))
case op == "READ_CONFLICT_RANGE":
e = sm.tr.AddReadConflictRange(fdb.KeyRange{fdb.Key(sm.waitAndPop().item.([]byte)), fdb.Key(sm.waitAndPop().item.([]byte))})
if e != nil {
panic(e)
}
sm.store(idx, []byte("SET_CONFLICT_RANGE"))
case op == "WRITE_CONFLICT_RANGE":
e = sm.tr.AddWriteConflictRange(fdb.KeyRange{fdb.Key(sm.waitAndPop().item.([]byte)), fdb.Key(sm.waitAndPop().item.([]byte))})
if e != nil {
panic(e)
}
sm.store(idx, []byte("SET_CONFLICT_RANGE"))
case op == "READ_CONFLICT_KEY":
e = sm.tr.AddReadConflictKey(fdb.Key(sm.waitAndPop().item.([]byte)))
if e != nil {
panic(e)
}
sm.store(idx, []byte("SET_CONFLICT_KEY"))
case op == "WRITE_CONFLICT_KEY":
e = sm.tr.AddWriteConflictKey(fdb.Key(sm.waitAndPop().item.([]byte)))
if e != nil {
panic(e)
}
sm.store(idx, []byte("SET_CONFLICT_KEY"))
case op == "ATOMIC_OP":
opname := strings.Replace(strings.Title(strings.Replace(strings.ToLower(sm.waitAndPop().item.(string)), "_", " ", -1)), " ", "", -1)
key := fdb.Key(sm.waitAndPop().item.([]byte))
value := sm.waitAndPop().item.([]byte)
sm.executeMutation(t, func(tr fdb.Transaction) (interface{}, error) {
reflect.ValueOf(tr).MethodByName(opname).Call([]reflect.Value{reflect.ValueOf(key), reflect.ValueOf(value)})
return nil, nil
}, isDB, idx)
case op == "DISABLE_WRITE_CONFLICT":
sm.tr.Options().SetNextWriteNoWriteConflictRange()
case op == "CANCEL":
sm.tr.Cancel()
case op == "UNIT_TESTS":
db.Options().SetLocationCacheSize(100001)
db.Options().SetMaxWatches(10001)
tr, e := db.CreateTransaction()
if e != nil {
panic(e)
}
tr.Options().SetPrioritySystemImmediate()
tr.Options().SetPriorityBatch()
tr.Options().SetCausalReadRisky()
tr.Options().SetCausalWriteRisky()
tr.Options().SetReadYourWritesDisable()
tr.Options().SetReadAheadDisable()
tr.Options().SetReadSystemKeys()
tr.Options().SetAccessSystemKeys()
tr.Options().SetDurabilityDevNullIsWebScale()
tr.Options().SetTimeout(1000)
tr.Options().SetRetryLimit(5)
tr.Options().SetMaxRetryDelay(100)
tr.Get(fdb.Key("\xff")).MustGet()
tr.Commit().MustGet()
sm.testWatches()
sm.testLocality()
case strings.HasPrefix(op, "DIRECTORY_"):
sm.de.processOp(sm, op[10:], isDB, idx, t, rt)
default:
log.Fatalf("Unhandled operation %s\n", string(inst[0].([]byte)))
}
if sm.verbose {
fmt.Printf(" to [")
sm.dumpStack()
fmt.Printf(" ]\n\n")
}
runtime.Gosched()
}