func ExampleRangeIterator() {
fdb.MustAPIVersion(200)
db := fdb.MustOpenDefault()
tr, e := db.CreateTransaction()
if e != nil {
fmt.Printf("Unable to create transaction: %v\n", e)
return
}
// Clear and initialize data in this transaction. In examples we do not
// commit transactions to avoid mutating a real database.
tr.ClearRange(fdb.KeyRange{fdb.Key(""), fdb.Key{0xFF}})
tr.Set(fdb.Key("apple"), []byte("foo"))
tr.Set(fdb.Key("cherry"), []byte("baz"))
tr.Set(fdb.Key("banana"), []byte("bar"))
rr := tr.GetRange(fdb.KeyRange{fdb.Key(""), fdb.Key{0xFF}}, fdb.RangeOptions{})
ri := rr.Iterator()
// Advance will return true until the iterator is exhausted
for ri.Advance() {
kv, e := ri.Get()
if e != nil {
fmt.Printf("Unable to read next value: %v\n", e)
return
}
fmt.Printf("%s is %s\n", kv.Key, kv.Value)
}
// Output:
// apple is foo
// banana is bar
// cherry is baz
}
func (sm *StackMachine) testLocality() {
tr, e := db.CreateTransaction()
if e != nil {
panic(e)
}
tr.Options().SetReadSystemKeys()
boundaryKeys, e := db.LocalityGetBoundaryKeys(fdb.KeyRange{fdb.Key(""), fdb.Key("\xff\xff")}, 0, 0)
if e != nil {
panic(e)
}
for i := 0; i < len(boundaryKeys)-1; i++ {
start := boundaryKeys[i]
end := tr.GetKey(fdb.LastLessThan(boundaryKeys[i+1])).MustGet()
startAddresses := tr.LocalityGetAddressesForKey(start).MustGet()
endAddresses := tr.LocalityGetAddressesForKey(end).MustGet()
for _, address1 := range startAddresses {
found := false
for _, address2 := range endAddresses {
if address1 == address2 {
found = true
break
}
}
if !found {
panic("Locality not internally consistent.")
}
}
}
}
// Range returns the KeyRange that describes the keys encoding tuples that
// strictly begin with t (that is, all tuples of greater length than t of which
// t is a prefix). Range will panic if the tuple contains an element of any type
// other than []byte, string, int64, int, or nil.
func (t Tuple) Range() fdb.KeyRange {
p := t.Pack()
begin := make([]byte, len(p)+1)
copy(begin, p)
end := make([]byte, len(p)+1)
copy(end, p)
end[len(p)] = 0xFF
return fdb.KeyRange{fdb.Key(begin), fdb.Key(end)}
}
func ExampleReadTransactor() {
fdb.MustAPIVersion(200)
db := fdb.MustOpenDefault()
getOne := func(rt fdb.ReadTransactor, key fdb.Key) ([]byte, error) {
fmt.Printf("getOne called with: %T\n", rt)
ret, e := rt.ReadTransact(func(rtr fdb.ReadTransaction) (interface{}, error) {
return rtr.Get(key).MustGet(), nil
})
if e != nil {
return nil, e
}
return ret.([]byte), nil
}
getTwo := func(rt fdb.ReadTransactor, key1, key2 fdb.Key) ([][]byte, error) {
fmt.Printf("getTwo called with: %T\n", rt)
ret, e := rt.ReadTransact(func(rtr fdb.ReadTransaction) (interface{}, error) {
r1, _ := getOne(rtr, key1)
r2, _ := getOne(rtr.Snapshot(), key2)
return [][]byte{r1, r2}, nil
})
if e != nil {
return nil, e
}
return ret.([][]byte), nil
}
var e error
fmt.Println("Calling getOne with a database:")
_, e = getOne(db, fdb.Key("foo"))
if e != nil {
fmt.Println(e)
return
}
fmt.Println("\nCalling getTwo with a database:")
_, e = getTwo(db, fdb.Key("foo"), fdb.Key("bar"))
if e != nil {
fmt.Println(e)
return
}
// Output:
// Calling getOne with a database:
// getOne called with: fdb.Database
//
// Calling getTwo with a database:
// getTwo called with: fdb.Database
// getOne called with: fdb.Transaction
// getOne called with: fdb.Snapshot
}
func ExampleTransactor() {
fdb.MustAPIVersion(200)
db := fdb.MustOpenDefault()
setOne := func(t fdb.Transactor, key fdb.Key, value []byte) error {
fmt.Printf("setOne called with: %T\n", t)
_, e := t.Transact(func(tr fdb.Transaction) (interface{}, error) {
// We don't actually call tr.Set here to avoid mutating a real database.
// tr.Set(key, value)
return nil, nil
})
return e
}
setMany := func(t fdb.Transactor, value []byte, keys ...fdb.Key) error {
fmt.Printf("setMany called with: %T\n", t)
_, e := t.Transact(func(tr fdb.Transaction) (interface{}, error) {
for _, key := range keys {
setOne(tr, key, value)
}
return nil, nil
})
return e
}
var e error
fmt.Println("Calling setOne with a database:")
e = setOne(db, []byte("foo"), []byte("bar"))
if e != nil {
fmt.Println(e)
return
}
fmt.Println("\nCalling setMany with a database:")
e = setMany(db, []byte("bar"), fdb.Key("foo1"), fdb.Key("foo2"), fdb.Key("foo3"))
if e != nil {
fmt.Println(e)
return
}
// Output:
// Calling setOne with a database:
// setOne called with: fdb.Database
//
// Calling setMany with a database:
// setMany called with: fdb.Database
// setOne called with: fdb.Transaction
// setOne called with: fdb.Transaction
// setOne called with: fdb.Transaction
}
func ExamplePrefixRange() {
_ = fdb.APIVersion(100)
db, _ := fdb.OpenDefault()
tr, _ := db.CreateTransaction()
// Clear and initialize data in this transaction. In examples we do not
// commit transactions to avoid mutating a real database.
tr.ClearRange(fdb.KeyRange{fdb.Key(""), fdb.Key{0xFF}})
tr.Set(fdb.Key("alpha"), []byte("1"))
tr.Set(fdb.Key("alphabetA"), []byte("2"))
tr.Set(fdb.Key("alphabetB"), []byte("3"))
tr.Set(fdb.Key("alphabetize"), []byte("4"))
tr.Set(fdb.Key("beta"), []byte("5"))
// Construct the range of all keys beginning with "alphabet"
pr, _ := fdb.PrefixRange([]byte("alphabet"))
// Read and process the range
kvs, _ := tr.GetRange(pr, fdb.RangeOptions{}).GetSliceWithError()
for _, kv := range kvs {
fmt.Printf("%s: %s\n", string(kv.Key), string(kv.Value))
}
// Output:
// alphabetA: 2
// alphabetB: 3
// alphabetize: 4
}
func (sm *StackMachine) Run() {
r, e := db.Transact(func(tr fdb.Transaction) (interface{}, error) {
return tr.GetRange(tuple.Tuple{sm.prefix}, fdb.RangeOptions{}).GetSliceOrPanic(), nil
})
if e != nil {
panic(e)
}
instructions := r.([]fdb.KeyValue)
for i, kv := range instructions {
inst, _ := tuple.Unpack(fdb.Key(kv.Value))
if sm.verbose {
fmt.Printf("Instruction %d\n", i)
}
sm.processInst(i, inst)
}
sm.threads.Wait()
}
func (es *fdbStore) ReadAll(last []byte, limit int) *GlobalSlice {
globalSpace := es.space.Sub(globalPrefix)
start, end := globalSpace.FDBRangeKeys()
r, err := es.db.ReadTransact(func(tr fdb.ReadTransaction) (interface{}, error) {
var scan fdb.KeyRange
if nil == last {
scan = fdb.KeyRange{start, end}
} else {
next := tr.Snapshot().GetKey(fdb.FirstGreaterThan(fdb.Key(last))).MustGet()
scan = fdb.KeyRange{next, end}
}
rr := tr.Snapshot().GetRange(scan, fdb.RangeOptions{Limit: limit})
return rr.GetSliceOrPanic(), nil
})
if err != nil {
panic("Failed to read all events")
}
kvs := r.([]fdb.KeyValue)
result := make([]GlobalRecord, len(kvs))
for i, kv := range kvs {
if t, err := globalSpace.Unpack(kv.Key); err != nil {
panic("Failed to unpack key")
} else {
result[i].Contract = t[1].(string)
result[i].Data = kv.Value
last = []byte(kv.Key)
}
}
return &GlobalSlice{result, last}
}
func (dl directoryLayer) nodeContainingKey(rtr fdb.ReadTransaction, key []byte) (subspace.Subspace, error) {
if bytes.HasPrefix(key, dl.nodeSS.Bytes()) {
return dl.rootNode, nil
}
bk, _ := dl.nodeSS.FDBRangeKeys()
kr := fdb.KeyRange{bk, fdb.Key(append(dl.nodeSS.Pack(tuple.Tuple{key}), 0x00))}
kvs := rtr.GetRange(kr, fdb.RangeOptions{Reverse: true, Limit: 1}).GetSliceOrPanic()
if len(kvs) == 1 {
pp, e := dl.nodeSS.Unpack(kvs[0].Key)
if e != nil {
return nil, e
}
prevPrefix := pp[0].([]byte)
if bytes.HasPrefix(key, prevPrefix) {
return dl.nodeWithPrefix(prevPrefix), nil
}
}
return nil, nil
}
func ExamplePrefixRange() {
fdb.MustAPIVersion(200)
db := fdb.MustOpenDefault()
tr, e := db.CreateTransaction()
if e != nil {
fmt.Printf("Unable to create transaction: %v\n", e)
return
}
// Clear and initialize data in this transaction. In examples we do not
// commit transactions to avoid mutating a real database.
tr.ClearRange(fdb.KeyRange{fdb.Key(""), fdb.Key{0xFF}})
tr.Set(fdb.Key("alpha"), []byte("1"))
tr.Set(fdb.Key("alphabetA"), []byte("2"))
tr.Set(fdb.Key("alphabetB"), []byte("3"))
tr.Set(fdb.Key("alphabetize"), []byte("4"))
tr.Set(fdb.Key("beta"), []byte("5"))
// Construct the range of all keys beginning with "alphabet". It is safe to
// ignore the error return from PrefixRange unless the provided prefix might
// consist entirely of zero or more 0xFF bytes.
pr, _ := fdb.PrefixRange([]byte("alphabet"))
// Read and process the range
kvs, e := tr.GetRange(pr, fdb.RangeOptions{}).GetSliceWithError()
if e != nil {
fmt.Printf("Unable to read range: %v\n", e)
}
for _, kv := range kvs {
fmt.Printf("%s: %s\n", string(kv.Key), string(kv.Value))
}
// Output:
// alphabetA: 2
// alphabetB: 3
// alphabetize: 4
}
func (s subspace) Pack(t tuple.Tuple) fdb.Key {
return fdb.Key(concat(s.b, t.Pack()...))
}
func (s subspace) FDBRangeKeys() (fdb.KeyConvertible, fdb.KeyConvertible) {
return fdb.Key(concat(s.b, 0x00)), fdb.Key(concat(s.b, 0xFF))
}
func (de *DirectoryExtension) processOp(sm *StackMachine, op string, isDB bool, idx int, t fdb.Transactor, rt fdb.ReadTransactor) {
defer func() {
if r := recover(); r != nil {
sm.store(idx, []byte("DIRECTORY_ERROR"))
if createOps[op] {
de.store(nil)
}
}
}()
var e error
switch {
case op == "CREATE_SUBSPACE":
tuples := sm.popTuples(1)
rp := sm.waitAndPop().item.([]byte)
s := subspace.FromBytes(rp).Sub(tuples[0]...)
de.store(s)
case op == "CREATE_LAYER":
idx1 := sm.waitAndPop().item.(int64)
idx2 := sm.waitAndPop().item.(int64)
amp := sm.waitAndPop().item.(int64)
nodeSS := de.list[idx1]
contentSS := de.list[idx2]
if nodeSS == nil || contentSS == nil {
de.store(nil)
} else {
de.store(directory.NewDirectoryLayer(nodeSS.(subspace.Subspace), contentSS.(subspace.Subspace), (amp == int64(1))))
}
case op == "CREATE_OR_OPEN":
tuples := sm.popTuples(1)
l := sm.waitAndPop().item
var layer []byte
if l != nil {
layer = l.([]byte)
}
d, e := de.cwd().CreateOrOpen(t, tupleToPath(tuples[0]), layer)
if e != nil {
panic(e)
}
de.store(d)
case op == "CREATE":
tuples := sm.popTuples(1)
l := sm.waitAndPop().item
var layer []byte
if l != nil {
layer = l.([]byte)
}
p := sm.waitAndPop().item
var d directory.Directory
if p == nil {
d, e = de.cwd().Create(t, tupleToPath(tuples[0]), layer)
} else {
// p.([]byte) itself may be nil, but CreatePrefix handles that appropriately
d, e = de.cwd().CreatePrefix(t, tupleToPath(tuples[0]), layer, p.([]byte))
}
if e != nil {
panic(e)
}
de.store(d)
case op == "OPEN":
tuples := sm.popTuples(1)
l := sm.waitAndPop().item
var layer []byte
if l != nil {
layer = l.([]byte)
}
d, e := de.cwd().Open(rt, tupleToPath(tuples[0]), layer)
if e != nil {
panic(e)
}
de.store(d)
case op == "CHANGE":
i := sm.waitAndPop().item.(int64)
if de.list[i] == nil {
i = de.errorIndex
}
de.index = i
case op == "SET_ERROR_INDEX":
de.errorIndex = sm.waitAndPop().item.(int64)
case op == "MOVE":
tuples := sm.popTuples(2)
d, e := de.cwd().Move(t, tupleToPath(tuples[0]), tupleToPath(tuples[1]))
if e != nil {
panic(e)
}
de.store(d)
case op == "MOVE_TO":
tuples := sm.popTuples(1)
d, e := de.cwd().MoveTo(t, tupleToPath(tuples[0]))
if e != nil {
panic(e)
}
de.store(d)
case strings.HasPrefix(op, "REMOVE"):
path := sm.maybePath()
// This ***HAS*** to call Transact to ensure that any directory version
// key set in the process of trying to remove this potentially
// non-existent directory, in the REMOVE but not REMOVE_IF_EXISTS case,
// doesn't end up committing the version key. (Other languages have
// separate remove() and remove_if_exists() so don't have this tricky
// issue).
_, e := t.Transact(func(tr fdb.Transaction) (interface{}, error) {
ok, e := de.cwd().Remove(tr, path)
if e != nil {
panic(e)
}
switch op[6:] {
case "":
if !ok {
panic("directory does not exist")
}
case "_IF_EXISTS":
}
return nil, nil
})
if e != nil {
panic(e)
}
case op == "LIST":
subs, e := de.cwd().List(rt, sm.maybePath())
if e != nil {
panic(e)
}
t := make(tuple.Tuple, len(subs))
for i, s := range subs {
t[i] = s
}
sm.store(idx, t.Pack())
case op == "EXISTS":
b, e := de.cwd().Exists(rt, sm.maybePath())
if e != nil {
panic(e)
}
if b {
sm.store(idx, int64(1))
} else {
sm.store(idx, int64(0))
}
case op == "PACK_KEY":
tuples := sm.popTuples(1)
sm.store(idx, de.css().Pack(tuples[0]))
case op == "UNPACK_KEY":
t, e := de.css().Unpack(fdb.Key(sm.waitAndPop().item.([]byte)))
if e != nil {
panic(e)
}
for _, el := range t {
sm.store(idx, el)
}
case op == "RANGE":
ss := de.css().Sub(sm.popTuples(1)[0]...)
bk, ek := ss.FDBRangeKeys()
sm.store(idx, bk)
sm.store(idx, ek)
case op == "CONTAINS":
k := sm.waitAndPop().item.([]byte)
b := de.css().Contains(fdb.Key(k))
if b {
sm.store(idx, int64(1))
} else {
sm.store(idx, int64(0))
}
case op == "OPEN_SUBSPACE":
de.store(de.css().Sub(sm.popTuples(1)[0]...))
case op == "LOG_SUBSPACE":
k := sm.waitAndPop().item.([]byte)
k = append(k, tuple.Tuple{de.index}.Pack()...)
v := de.css().Bytes()
t.Transact(func(tr fdb.Transaction) (interface{}, error) {
tr.Set(fdb.Key(k), v)
return nil, nil
})
case op == "LOG_DIRECTORY":
rp := sm.waitAndPop().item.([]byte)
ss := subspace.FromBytes(rp).Sub(de.index)
k1 := ss.Pack(tuple.Tuple{"path"})
v1 := tuplePackStrings(de.cwd().GetPath())
k2 := ss.Pack(tuple.Tuple{"layer"})
v2 := tuple.Tuple{de.cwd().GetLayer()}.Pack()
k3 := ss.Pack(tuple.Tuple{"exists"})
var v3 []byte
exists, e := de.cwd().Exists(rt, nil)
if e != nil {
panic(e)
}
if exists {
v3 = tuple.Tuple{1}.Pack()
} else {
v3 = tuple.Tuple{0}.Pack()
}
k4 := ss.Pack(tuple.Tuple{"children"})
var subs []string
if exists {
subs, e = de.cwd().List(rt, nil)
if e != nil {
panic(e)
}
}
v4 := tuplePackStrings(subs)
t.Transact(func(tr fdb.Transaction) (interface{}, error) {
tr.Set(k1, v1)
tr.Set(k2, v2)
tr.Set(k3, v3)
tr.Set(k4, v4)
return nil, nil
})
case op == "STRIP_PREFIX":
ba := sm.waitAndPop().item.([]byte)
ssb := de.css().Bytes()
if !bytes.HasPrefix(ba, ssb) {
panic("prefix mismatch")
}
ba = ba[len(ssb):]
sm.store(idx, ba)
}
}
func (sm *StackMachine) popKeyRange() fdb.KeyRange {
kr := fdb.KeyRange{fdb.Key(sm.waitAndPop().item.([]byte)), fdb.Key(sm.waitAndPop().item.([]byte))}
return kr
}
func (sm *StackMachine) popSelector() fdb.KeySelector {
sel := fdb.KeySelector{fdb.Key(sm.waitAndPop().item.([]byte)), int64ToBool(sm.waitAndPop().item.(int64)), int(sm.waitAndPop().item.(int64))}
return sel
}
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()
}
func (s subspace) FDBKey() fdb.Key {
return fdb.Key(s.b)
}
func (sm *StackMachine) testWatches() {
tr, e := db.CreateTransaction()
if e != nil {
panic(e)
}
tr.Set(fdb.Key("w0"), []byte("0"))
tr.Set(fdb.Key("w2"), []byte("2"))
tr.Set(fdb.Key("w3"), []byte("3"))
tr.Commit().MustGet()
var watches [4]fdb.FutureNil
watches[0] = tr.Watch(fdb.Key("w0"))
watches[1] = tr.Watch(fdb.Key("w1"))
watches[2] = tr.Watch(fdb.Key("w2"))
watches[3] = tr.Watch(fdb.Key("w3"))
time.Sleep(1 * time.Second)
for _, watch := range watches {
if watch.IsReady() {
panic("Watch should not be ready (1)")
}
}
tr.Set(fdb.Key("w0"), []byte("0"))
tr.Clear(fdb.Key("w1"))
tr.Commit().MustGet()
time.Sleep(5 * time.Second)
for _, watch := range watches {
if watch.IsReady() {
panic("Watch should not be ready (2)")
}
}
tr.Set(fdb.Key("w0"), []byte("a"))
tr.Set(fdb.Key("w1"), []byte("b"))
tr.Clear(fdb.Key("w2"))
tr.BitXor(fdb.Key("w3"), []byte("\xff\xff"))
tr.Commit().MustGet()
for _, watch := range watches {
watch.MustGet()
}
}
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, tuple.Tuple{[]byte("ERROR"), []byte(fmt.Sprintf("%d", int(r)))}.Pack())
default:
panic(r)
}
}
}()
var e error
op := string(inst[0].([]byte))
if sm.verbose {
fmt.Printf("Instruction is %s (%v)\n", op, sm.prefix)
fmt.Printf("Stack from [")
sm.dumpStack()
fmt.Printf(" ]\n")
}
var obj interface{}
switch {
case strings.HasSuffix(op, "_SNAPSHOT"):
obj = sm.tr.Snapshot()
op = op[:len(op)-9]
case strings.HasSuffix(op, "_DATABASE"):
obj = db
op = op[:len(op)-9]
default:
obj = sm.tr
}
switch string(op) {
case "PUSH":
sm.store(idx, inst[1])
case "DUP":
entry := sm.stack[len(sm.stack)-1]
sm.store(entry.idx, entry.item)
case "EMPTY_STACK":
sm.stack = []stackEntry{}
sm.stack = make([]stackEntry, 0)
case "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 "POP":
sm.stack = sm.stack[:len(sm.stack)-1]
case "SUB":
sm.store(idx, sm.waitAndPop().item.(int64)-sm.waitAndPop().item.(int64))
case "NEW_TRANSACTION":
sm.tr, e = db.CreateTransaction()
if e != nil {
panic(e)
}
case "ON_ERROR":
sm.store(idx, sm.tr.OnError(fdb.Error(int(sm.waitAndPop().item.(int64)))))
case "GET_READ_VERSION":
sm.lastVersion = obj.(fdb.ReadTransaction).GetReadVersion().GetOrPanic()
sm.store(idx, []byte("GOT_READ_VERSION"))
case "SET":
switch o := obj.(type) {
case fdb.Database:
e = o.Set(fdb.Key(sm.waitAndPop().item.([]byte)), sm.waitAndPop().item.([]byte))
if e != nil {
panic(e)
}
sm.store(idx, []byte("RESULT_NOT_PRESENT"))
case fdb.Transaction:
o.Set(fdb.Key(sm.waitAndPop().item.([]byte)), sm.waitAndPop().item.([]byte))
}
case "LOG_STACK":
prefix := sm.waitAndPop().item.([]byte)
for i := len(sm.stack) - 1; i >= 0; i-- {
if i%100 == 0 {
sm.tr.Commit().GetOrPanic()
}
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().GetOrPanic()
case "GET":
switch o := obj.(type) {
case fdb.Database:
v, e := db.Get(fdb.Key(sm.waitAndPop().item.([]byte)))
if e != nil {
panic(e)
}
if v != nil {
sm.store(idx, v)
} else {
sm.store(idx, []byte("RESULT_NOT_PRESENT"))
}
case fdb.ReadTransaction:
sm.store(idx, o.Get(fdb.Key(sm.waitAndPop().item.([]byte))))
}
case "COMMIT":
sm.store(idx, sm.tr.Commit())
case "RESET":
sm.tr.Reset()
case "CLEAR":
switch o := obj.(type) {
case fdb.Database:
e := db.Clear(fdb.Key(sm.waitAndPop().item.([]byte)))
if e != nil {
panic(e)
}
sm.store(idx, []byte("RESULT_NOT_PRESENT"))
case fdb.Transaction:
o.Clear(fdb.Key(sm.waitAndPop().item.([]byte)))
}
case "SET_READ_VERSION":
sm.tr.SetReadVersion(sm.lastVersion)
case "WAIT_FUTURE":
entry := sm.waitAndPop()
sm.store(entry.idx, entry.item)
case "GET_COMMITTED_VERSION":
sm.lastVersion, e = sm.tr.GetCommittedVersion()
if e != nil {
panic(e)
}
sm.store(idx, []byte("GOT_COMMITTED_VERSION"))
case "GET_KEY":
sel := fdb.KeySelector{fdb.Key(sm.waitAndPop().item.([]byte)), int64ToBool(sm.waitAndPop().item.(int64)), int(sm.waitAndPop().item.(int64))}
switch o := obj.(type) {
case fdb.Database:
v, e := o.GetKey(sel)
if e != nil {
panic(e)
}
sm.store(idx, []byte(v))
case fdb.ReadTransaction:
sm.store(idx, o.GetKey(sel))
}
case "GET_RANGE":
begin := fdb.Key(sm.waitAndPop().item.([]byte))
end := fdb.Key(sm.waitAndPop().item.([]byte))
var limit int
switch l := sm.waitAndPop().item.(type) {
case int64:
limit = int(l)
}
reverse := int64ToBool(sm.waitAndPop().item.(int64))
mode := sm.waitAndPop().item.(int64)
switch o := obj.(type) {
case fdb.Database:
v, e := db.GetRange(fdb.KeyRange{begin, end}, fdb.RangeOptions{Limit: int(limit), Reverse: reverse, Mode: fdb.StreamingMode(mode + 1)})
if e != nil {
panic(e)
}
sm.pushRange(idx, v)
case fdb.ReadTransaction:
sm.pushRange(idx, o.GetRange(fdb.KeyRange{begin, end}, fdb.RangeOptions{Limit: int(limit), Reverse: reverse, Mode: fdb.StreamingMode(mode + 1)}).GetSliceOrPanic())
}
case "CLEAR_RANGE":
switch o := obj.(type) {
case fdb.Database:
e := o.ClearRange(fdb.KeyRange{fdb.Key(sm.waitAndPop().item.([]byte)), fdb.Key(sm.waitAndPop().item.([]byte))})
if e != nil {
panic(e)
}
sm.store(idx, []byte("RESULT_NOT_PRESENT"))
case fdb.Transaction:
o.ClearRange(fdb.KeyRange{fdb.Key(sm.waitAndPop().item.([]byte)), fdb.Key(sm.waitAndPop().item.([]byte))})
}
case "GET_RANGE_STARTS_WITH":
prefix := sm.waitAndPop().item.([]byte)
var limit int
switch l := sm.waitAndPop().item.(type) {
case int64:
limit = int(l)
}
reverse := int64ToBool(sm.waitAndPop().item.(int64))
mode := sm.waitAndPop().item.(int64)
er, e := fdb.PrefixRange(prefix)
if e != nil {
panic(e)
}
switch o := obj.(type) {
case fdb.Database:
v, e := db.GetRange(er, fdb.RangeOptions{Limit: int(limit), Reverse: reverse, Mode: fdb.StreamingMode(mode + 1)})
if e != nil {
panic(e)
}
sm.pushRange(idx, v)
case fdb.ReadTransaction:
sm.pushRange(idx, o.GetRange(er, fdb.RangeOptions{Limit: int(limit), Reverse: reverse, Mode: fdb.StreamingMode(mode + 1)}).GetSliceOrPanic())
}
case "GET_RANGE_SELECTOR":
begin := fdb.KeySelector{Key: fdb.Key(sm.waitAndPop().item.([]byte)), OrEqual: int64ToBool(sm.waitAndPop().item.(int64)), Offset: int(sm.waitAndPop().item.(int64))}
end := fdb.KeySelector{Key: fdb.Key(sm.waitAndPop().item.([]byte)), OrEqual: int64ToBool(sm.waitAndPop().item.(int64)), Offset: int(sm.waitAndPop().item.(int64))}
var limit int
switch l := sm.waitAndPop().item.(type) {
case int64:
limit = int(l)
}
reverse := int64ToBool(sm.waitAndPop().item.(int64))
mode := sm.waitAndPop().item.(int64)
switch o := obj.(type) {
case fdb.Database:
v, e := db.GetRange(fdb.SelectorRange{begin, end}, fdb.RangeOptions{Limit: int(limit), Reverse: reverse, Mode: fdb.StreamingMode(mode + 1)})
if e != nil {
panic(e)
}
sm.pushRange(idx, v)
case fdb.ReadTransaction:
sm.pushRange(idx, o.GetRange(fdb.SelectorRange{begin, end}, fdb.RangeOptions{Limit: int(limit), Reverse: reverse, Mode: fdb.StreamingMode(mode + 1)}).GetSliceOrPanic())
}
case "CLEAR_RANGE_STARTS_WITH":
prefix := sm.waitAndPop().item.([]byte)
er, e := fdb.PrefixRange(prefix)
if e != nil {
panic(e)
}
switch o := obj.(type) {
case fdb.Database:
e := o.ClearRange(er)
if e != nil {
panic(e)
}
sm.store(idx, []byte("RESULT_NOT_PRESENT"))
case fdb.Transaction:
o.ClearRange(er)
}
case "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, t.Pack())
case "TUPLE_UNPACK":
t, e := tuple.Unpack(sm.waitAndPop().item.([]byte))
if e != nil {
panic(e)
}
for _, el := range t {
sm.store(idx, tuple.Tuple{el}.Pack())
}
case "TUPLE_RANGE":
var t tuple.Tuple
count := sm.waitAndPop().item.(int64)
for i := 0; i < int(count); i++ {
t = append(t, sm.waitAndPop().item)
}
kr := t.Range()
sm.store(idx, kr.Begin)
sm.store(idx, kr.End)
case "START_THREAD":
newsm := newStackMachine(sm.waitAndPop().item.([]byte), verbose)
sm.threads.Add(1)
go func() {
newsm.Run()
sm.threads.Done()
}()
case "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 "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 "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 "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 "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 "ATOMIC_OP":
opname := strings.Title(strings.ToLower(string(sm.waitAndPop().item.([]byte))))
key := fdb.Key(sm.waitAndPop().item.([]byte))
value := sm.waitAndPop().item.([]byte)
reflect.ValueOf(obj).MethodByName(opname).Call([]reflect.Value{reflect.ValueOf(key), reflect.ValueOf(value)})
switch obj.(type) {
case fdb.Database:
sm.store(idx, []byte("RESULT_NOT_PRESENT"))
}
case "DISABLE_WRITE_CONFLICT":
sm.tr.Options().SetNextWriteNoWriteConflictRange()
case "CANCEL":
sm.tr.Cancel()
case "UNIT_TESTS":
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()
}
