/
serialize.go
805 lines (730 loc) · 23.4 KB
/
serialize.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
// Licensed to the Apache Software Foundation (ASF) under one or more
// contributor license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright ownership.
// The ASF licenses this file to You 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 graphx
import (
"reflect"
"strings"
"time"
"github.com/apache/beam/sdks/v2/go/pkg/beam/core/funcx"
"github.com/apache/beam/sdks/v2/go/pkg/beam/core/graph"
"github.com/apache/beam/sdks/v2/go/pkg/beam/core/graph/coder"
"github.com/apache/beam/sdks/v2/go/pkg/beam/core/graph/window"
"github.com/apache/beam/sdks/v2/go/pkg/beam/core/runtime"
v1pb "github.com/apache/beam/sdks/v2/go/pkg/beam/core/runtime/graphx/v1"
"github.com/apache/beam/sdks/v2/go/pkg/beam/core/typex"
"github.com/apache/beam/sdks/v2/go/pkg/beam/core/util/jsonx"
"github.com/apache/beam/sdks/v2/go/pkg/beam/core/util/reflectx"
"github.com/apache/beam/sdks/v2/go/pkg/beam/internal/errors"
)
var genFnType = reflect.TypeOf((*func(string, reflect.Type, []byte) reflectx.Func)(nil)).Elem()
// EncodeMultiEdge converts the preprocessed representation into the wire
// representation of the multiedge, capturing input and output type information.
func EncodeMultiEdge(edge *graph.MultiEdge) (*v1pb.MultiEdge, error) {
ret := &v1pb.MultiEdge{}
ret.Opcode = string(edge.Op)
if edge.DoFn != nil {
ref, err := encodeFn((*graph.Fn)(edge.DoFn))
if err != nil {
wrapped := errors.Wrap(err, "bad userfn")
return nil, errors.WithContextf(wrapped, "encoding userfn %v", edge)
}
ret.Fn = ref
}
if edge.CombineFn != nil {
ref, err := encodeFn((*graph.Fn)(edge.CombineFn))
if err != nil {
wrapped := errors.Wrap(err, "bad combinefn")
return nil, errors.WithContextf(wrapped, "encoding userfn %v", edge)
}
ret.Fn = ref
}
if edge.WindowFn != nil {
ret.WindowFn = encodeWindowFn(edge.WindowFn)
}
for _, in := range edge.Input {
kind, err := encodeInputKind(in.Kind)
if err != nil {
wrapped := errors.Wrap(err, "bad input type")
return nil, errors.WithContextf(wrapped, "encoding userfn %v", edge)
}
t, err := encodeFullType(in.Type)
if err != nil {
wrapped := errors.Wrap(err, "bad input type")
return nil, errors.WithContextf(wrapped, "encoding userfn %v", edge)
}
ret.Inbound = append(ret.Inbound, &v1pb.MultiEdge_Inbound{Kind: kind, Type: t})
}
for _, out := range edge.Output {
t, err := encodeFullType(out.Type)
if err != nil {
wrapped := errors.Wrap(err, "bad output type")
return nil, errors.WithContextf(wrapped, "encoding userfn %v", edge)
}
ret.Outbound = append(ret.Outbound, &v1pb.MultiEdge_Outbound{Type: t})
}
return ret, nil
}
// DecodeMultiEdge converts the wire representation into the preprocessed
// components representing that edge. We deserialize to components to avoid
// inserting the edge into a graph or creating a detached edge.
func DecodeMultiEdge(edge *v1pb.MultiEdge) (graph.Opcode, *graph.Fn, *window.Fn, []*graph.Inbound, []*graph.Outbound, error) {
var u *graph.Fn
var wfn *window.Fn
var inbound []*graph.Inbound
var outbound []*graph.Outbound
opcode := graph.Opcode(edge.Opcode)
if edge.Fn != nil {
var err error
u, err = decodeFn(edge.Fn)
if err != nil {
wrapped := errors.Wrap(err, "bad function")
return "", nil, nil, nil, nil, errors.WithContextf(wrapped, "decoding userfn %v", edge)
}
}
if edge.WindowFn != nil {
wfn = decodeWindowFn(edge.WindowFn)
}
for _, in := range edge.Inbound {
kind, err := decodeInputKind(in.Kind)
if err != nil {
wrapped := errors.Wrap(err, "bad input kind")
return "", nil, nil, nil, nil, errors.WithContextf(wrapped, "decoding userfn %v", edge)
}
t, err := decodeFullType(in.Type)
if err != nil {
wrapped := errors.Wrap(err, "bad input type")
return "", nil, nil, nil, nil, errors.WithContextf(wrapped, "decoding userfn %v", edge)
}
inbound = append(inbound, &graph.Inbound{Kind: kind, Type: t})
}
for _, out := range edge.Outbound {
t, err := decodeFullType(out.Type)
if err != nil {
wrapped := errors.Wrap(err, "bad output type")
return "", nil, nil, nil, nil, errors.WithContextf(wrapped, "decoding userfn %v", edge)
}
outbound = append(outbound, &graph.Outbound{Type: t})
}
return opcode, u, wfn, inbound, outbound, nil
}
func encodeCustomCoder(c *coder.CustomCoder) (*v1pb.CustomCoder, error) {
t, err := encodeType(c.Type)
if err != nil {
return nil, errors.WithContextf(err, "encoding custom coder %v for type %v", c, c.Type)
}
enc, err := encodeUserFn(c.Enc)
if err != nil {
wrapped := errors.Wrap(err, "bad encoding function")
return nil, errors.WithContextf(wrapped, "encoding custom coder %v", c)
}
dec, err := encodeUserFn(c.Dec)
if err != nil {
wrapped := errors.Wrap(err, "bad decoding function")
return nil, errors.WithContextf(wrapped, "encoding custom coder %v", c)
}
ret := &v1pb.CustomCoder{
Name: c.Name,
Type: t,
Enc: enc,
Dec: dec,
}
return ret, nil
}
func decodeCustomCoder(c *v1pb.CustomCoder) (*coder.CustomCoder, error) {
t, err := decodeType(c.Type)
if err != nil {
return nil, errors.WithContextf(err, "decoding custom coder %v for type %v", c, c.Type)
}
enc, err := decodeUserFn(c.Enc)
if err != nil {
wrapped := errors.Wrap(err, "bad encoding function")
return nil, errors.WithContextf(wrapped, "decoding custom coder %v", c)
}
dec, err := decodeUserFn(c.Dec)
if err != nil {
wrapped := errors.Wrap(err, "bad decoding function")
return nil, errors.WithContextf(wrapped, "decoding custom coder %v", c)
}
ret, err := coder.NewCustomCoder(c.Name, t, enc, dec)
if err != nil {
return nil, errors.WithContextf(err, "decoding custom coder %v", c)
}
return ret, nil
}
func encodeWindowFn(w *window.Fn) *v1pb.WindowFn {
return &v1pb.WindowFn{
Kind: string(w.Kind),
SizeMs: duration2ms(w.Size),
PeriodMs: duration2ms(w.Period),
GapMs: duration2ms(w.Gap),
}
}
func decodeWindowFn(w *v1pb.WindowFn) *window.Fn {
return &window.Fn{
Kind: window.Kind(w.Kind),
Size: ms2duration(w.SizeMs),
Period: ms2duration(w.PeriodMs),
Gap: ms2duration(w.GapMs),
}
}
func duration2ms(d time.Duration) int64 {
return d.Nanoseconds() / 1e6
}
func ms2duration(d int64) time.Duration {
return time.Duration(d) * time.Millisecond
}
func encodeFn(u *graph.Fn) (*v1pb.Fn, error) {
switch {
case u.DynFn != nil:
gen := reflectx.FunctionName(u.DynFn.Gen)
t, err := encodeType(u.DynFn.T)
if err != nil {
wrapped := errors.Wrap(err, "bad function type")
return nil, errors.WithContextf(wrapped, "encoding dynamic DoFn %v", u)
}
return &v1pb.Fn{Dynfn: &v1pb.DynFn{
Name: u.DynFn.Name,
Type: t,
Data: u.DynFn.Data,
Gen: gen,
}}, nil
case u.Fn != nil:
fn, err := encodeUserFn(u.Fn)
if err != nil {
wrapped := errors.Wrap(err, "bad userfn")
return nil, errors.WithContextf(wrapped, "encoding DoFn %v", u)
}
return &v1pb.Fn{Fn: fn}, nil
case u.Recv != nil:
t := reflect.TypeOf(u.Recv)
k, ok := runtime.TypeKey(reflectx.SkipPtr(t))
if !ok {
err := errors.Errorf("failed to create TypeKey for receiver type %T", u.Recv)
return nil, errors.WithContextf(err, "encoding structural DoFn %v", u)
}
if _, ok := runtime.LookupType(k); !ok {
err := errors.Errorf("receiver type %v must be registered", t)
return nil, errors.WithContextf(err, "encoding structural DoFn %v", u)
}
typ, err := encodeType(t)
if err != nil {
wrapped := errors.Wrapf(err, "failed to encode receiver type %T", u.Recv)
return nil, errors.WithContextf(wrapped, "encoding structural DoFn %v", u)
}
data, err := jsonx.Marshal(u.Recv)
if err != nil {
wrapped := errors.Wrapf(err, "failed to marshal receiver %v", u.Recv)
return nil, errors.WithContextf(wrapped, "encoding structural DoFn %v", u)
}
return &v1pb.Fn{Type: typ, Opt: string(data)}, nil
default:
return nil, errors.Errorf("failed to encode DoFn %v, missing fn", u)
}
}
func decodeFn(u *v1pb.Fn) (*graph.Fn, error) {
if u.Dynfn != nil {
gen, err := runtime.ResolveFunction(u.Dynfn.Gen, genFnType)
if err != nil {
wrapped := errors.Wrapf(err, "bad symbol %v", u.Dynfn.Gen)
return nil, errors.WithContextf(wrapped, "decoding dynamic DoFn %v", u)
}
t, err := decodeType(u.Dynfn.Type)
if err != nil {
wrapped := errors.Wrap(err, "bad type")
return nil, errors.WithContextf(wrapped, "failed to decode dynamic DoFn %v", u)
}
return graph.NewFn(&graph.DynFn{
Name: u.Dynfn.Name,
T: t,
Data: u.Dynfn.Data,
Gen: gen.(func(string, reflect.Type, []byte) reflectx.Func),
})
}
if u.Fn != nil {
fn, err := decodeUserFn(u.Fn)
if err != nil {
wrapped := errors.Wrap(err, "failed to decode userfn")
return nil, errors.WithContextf(wrapped, "decoding DoFn %v", u)
}
fx, err := funcx.New(reflectx.MakeFunc(fn))
if err != nil {
wrapped := errors.Wrap(err, "failed to construct userfn")
return nil, errors.WithContextf(wrapped, "decoding DoFn %v", u)
}
return &graph.Fn{Fn: fx}, nil
}
t, err := decodeType(u.Type)
if err != nil {
wrapped := errors.Wrap(err, "bad type")
return nil, errors.WithContextf(wrapped, "decoding structural DoFn %v", u)
}
elem := reflect.New(t)
if err := jsonx.UnmarshalFrom(elem.Interface(), strings.NewReader(u.Opt)); err != nil {
wrapped := errors.Wrap(err, "bad struct encoding")
return nil, errors.WithContextf(wrapped, "decoding structural DoFn %v", u)
}
fn := elem.Elem().Interface()
return graph.NewFn(fn)
}
// encodeUserFn translates the preprocessed representation of a Beam user function
// into the wire representation, capturing all the inputs and outputs needed.
func encodeUserFn(u *funcx.Fn) (*v1pb.UserFn, error) {
// TODO(herohde) 5/23/2017: reject closures and dynamic functions. They can't
// be serialized.
symbol := u.Fn.Name()
t, err := encodeType(u.Fn.Type())
if err != nil {
wrapped := errors.Wrap(err, "bad function type")
return nil, errors.WithContextf(wrapped, "encoding userfn %v", u)
}
return &v1pb.UserFn{Name: symbol, Type: t}, nil
}
// decodeUserFn receives the wire representation of a Beam user function,
// extracting the preprocessed representation, expanding all inputs and outputs
// of the function.
func decodeUserFn(ref *v1pb.UserFn) (interface{}, error) {
t, err := decodeType(ref.GetType())
if err != nil {
return nil, err
}
return runtime.ResolveFunction(ref.Name, t)
}
func encodeFullType(t typex.FullType) (*v1pb.FullType, error) {
var components []*v1pb.FullType
if t.Class() == typex.Composite {
// Drop the Aggregate convenience component.
for _, comp := range t.Components() {
c, err := encodeFullType(comp)
if err != nil {
return nil, err
}
components = append(components, c)
}
}
prim, err := encodeType(t.Type())
if err != nil {
wrapped := errors.Wrap(err, "bad type")
return nil, errors.WithContextf(wrapped, "encoding full type %v", t)
}
return &v1pb.FullType{Type: prim, Components: components}, nil
}
func decodeFullType(t *v1pb.FullType) (typex.FullType, error) {
var components []typex.FullType
for _, comp := range t.Components {
c, err := decodeFullType(comp)
if err != nil {
return nil, err
}
components = append(components, c)
}
prim, err := decodeType(t.Type)
if err != nil {
wrapped := errors.Wrap(err, "bad type")
return nil, errors.WithContextf(wrapped, "decoding full type %v", t)
}
return typex.New(prim, components...), nil
}
func encodeType(t reflect.Type) (*v1pb.Type, error) {
if s, ok := tryEncodeSpecial(t); ok {
return &v1pb.Type{Kind: v1pb.Type_SPECIAL, Special: s}, nil
}
if k, ok := runtime.TypeKey(t); ok {
if _, present := runtime.LookupType(k); present {
// External type. Serialize by key and lookup in registry
// on decoding side.
return &v1pb.Type{Kind: v1pb.Type_EXTERNAL, ExternalKey: k}, nil
}
}
// The supplied type isn't special, so apply the standard encodings.
switch t.Kind() {
case reflect.Bool:
return &v1pb.Type{Kind: v1pb.Type_BOOL}, nil
case reflect.Int:
return &v1pb.Type{Kind: v1pb.Type_INT}, nil
case reflect.Int8:
return &v1pb.Type{Kind: v1pb.Type_INT8}, nil
case reflect.Int16:
return &v1pb.Type{Kind: v1pb.Type_INT16}, nil
case reflect.Int32:
return &v1pb.Type{Kind: v1pb.Type_INT32}, nil
case reflect.Int64:
return &v1pb.Type{Kind: v1pb.Type_INT64}, nil
case reflect.Uint:
return &v1pb.Type{Kind: v1pb.Type_UINT}, nil
case reflect.Uint8:
return &v1pb.Type{Kind: v1pb.Type_UINT8}, nil
case reflect.Uint16:
return &v1pb.Type{Kind: v1pb.Type_UINT16}, nil
case reflect.Uint32:
return &v1pb.Type{Kind: v1pb.Type_UINT32}, nil
case reflect.Uint64:
return &v1pb.Type{Kind: v1pb.Type_UINT64}, nil
case reflect.Float32:
return &v1pb.Type{Kind: v1pb.Type_FLOAT32}, nil
case reflect.Float64:
return &v1pb.Type{Kind: v1pb.Type_FLOAT64}, nil
case reflect.String:
return &v1pb.Type{Kind: v1pb.Type_STRING}, nil
case reflect.Slice:
elm, err := encodeType(t.Elem())
if err != nil {
wrapped := errors.Wrap(err, "bad element type")
return nil, errors.WithContextf(wrapped, "encoding slice %v", t)
}
return &v1pb.Type{Kind: v1pb.Type_SLICE, Element: elm}, nil
case reflect.Struct:
var fields []*v1pb.Type_StructField
for i := 0; i < t.NumField(); i++ {
f := t.Field(i)
if f.PkgPath != "" {
wrapped := errors.Errorf("type has unexported field: %v", f.Name)
return nil, errors.WithContextf(wrapped, "encoding struct %v", t)
}
fType, err := encodeType(f.Type)
if err != nil {
wrapped := errors.Wrap(err, "bad field type")
return nil, errors.WithContextf(wrapped, "encoding struct %v", t)
}
field := &v1pb.Type_StructField{
Name: f.Name,
PkgPath: f.PkgPath,
Type: fType,
Tag: string(f.Tag),
Offset: int64(f.Offset),
Index: encodeInts(f.Index),
Anonymous: f.Anonymous,
}
fields = append(fields, field)
}
return &v1pb.Type{Kind: v1pb.Type_STRUCT, Fields: fields}, nil
case reflect.Func:
var in []*v1pb.Type
for i := 0; i < t.NumIn(); i++ {
param, err := encodeType(t.In(i))
if err != nil {
wrapped := errors.Wrap(err, "bad parameter type")
return nil, errors.WithContextf(wrapped, "encoding function %v", t)
}
in = append(in, param)
}
var out []*v1pb.Type
for i := 0; i < t.NumOut(); i++ {
ret, err := encodeType(t.Out(i))
if err != nil {
wrapped := errors.Wrap(err, "bad return type")
return nil, errors.WithContextf(wrapped, "encoding function %v", t)
}
out = append(out, ret)
}
return &v1pb.Type{Kind: v1pb.Type_FUNC, ParameterTypes: in, ReturnTypes: out, IsVariadic: t.IsVariadic()}, nil
case reflect.Chan:
elm, err := encodeType(t.Elem())
if err != nil {
wrapped := errors.Wrap(err, "bad element type")
return nil, errors.WithContextf(wrapped, "encoding channel %v", t)
}
dir, err := encodeChanDir(t.ChanDir())
if err != nil {
wrapped := errors.Wrap(err, "bad channel direction")
return nil, errors.WithContextf(wrapped, "encoding channel %v", t)
}
return &v1pb.Type{Kind: v1pb.Type_CHAN, Element: elm, ChanDir: dir}, nil
case reflect.Ptr:
elm, err := encodeType(t.Elem())
if err != nil {
wrapped := errors.Wrap(err, "bad base type")
return nil, errors.WithContextf(wrapped, "encoding pointer %v", t)
}
return &v1pb.Type{Kind: v1pb.Type_PTR, Element: elm}, nil
default:
return nil, errors.Errorf("unencodable type %v", t)
}
}
func tryEncodeSpecial(t reflect.Type) (v1pb.Type_Special, bool) {
switch t {
case reflectx.Error:
return v1pb.Type_ERROR, true
case reflectx.Context:
return v1pb.Type_CONTEXT, true
case reflectx.Type:
return v1pb.Type_TYPE, true
case typex.EventTimeType:
return v1pb.Type_EVENTTIME, true
case typex.WindowType:
return v1pb.Type_WINDOW, true
case typex.KVType:
return v1pb.Type_KV, true
case typex.CoGBKType:
return v1pb.Type_COGBK, true
case typex.WindowedValueType:
return v1pb.Type_WINDOWEDVALUE, true
case typex.TType:
return v1pb.Type_T, true
case typex.UType:
return v1pb.Type_U, true
case typex.VType:
return v1pb.Type_V, true
case typex.WType:
return v1pb.Type_W, true
case typex.XType:
return v1pb.Type_X, true
case typex.YType:
return v1pb.Type_Y, true
case typex.ZType:
return v1pb.Type_Z, true
default:
return v1pb.Type_ILLEGAL, false
}
}
func decodeType(t *v1pb.Type) (reflect.Type, error) {
if t == nil {
err := errors.New("empty type")
return nil, errors.WithContextf(err, "decoding type %v", t)
}
switch t.Kind {
case v1pb.Type_BOOL:
return reflectx.Bool, nil
case v1pb.Type_INT:
return reflectx.Int, nil
case v1pb.Type_INT8:
return reflectx.Int8, nil
case v1pb.Type_INT16:
return reflectx.Int16, nil
case v1pb.Type_INT32:
return reflectx.Int32, nil
case v1pb.Type_INT64:
return reflectx.Int64, nil
case v1pb.Type_UINT:
return reflectx.Uint, nil
case v1pb.Type_UINT8:
return reflectx.Uint8, nil
case v1pb.Type_UINT16:
return reflectx.Uint16, nil
case v1pb.Type_UINT32:
return reflectx.Uint32, nil
case v1pb.Type_UINT64:
return reflectx.Uint64, nil
case v1pb.Type_FLOAT32:
return reflectx.Float32, nil
case v1pb.Type_FLOAT64:
return reflectx.Float64, nil
case v1pb.Type_STRING:
return reflectx.String, nil
case v1pb.Type_SLICE:
elm, err := decodeType(t.GetElement())
if err != nil {
wrapped := errors.Wrap(err, "bad element")
return nil, errors.WithContextf(wrapped, "failed to decode type %v, bad element", t)
}
return reflect.SliceOf(elm), nil
case v1pb.Type_STRUCT:
var fields []reflect.StructField
for _, f := range t.Fields {
fType, err := decodeType(f.Type)
if err != nil {
wrapped := errors.Wrap(err, "bad field type")
return nil, errors.WithContextf(wrapped, "failed to decode type %v, bad field type", t)
}
field := reflect.StructField{
Name: f.GetName(),
PkgPath: f.GetPkgPath(),
Type: fType,
Tag: reflect.StructTag(f.GetTag()),
Offset: uintptr(f.GetOffset()),
Index: decodeInts(f.GetIndex()),
Anonymous: f.GetAnonymous(),
}
fields = append(fields, field)
}
return reflect.StructOf(fields), nil
case v1pb.Type_FUNC:
in, err := decodeTypes(t.GetParameterTypes())
if err != nil {
wrapped := errors.Wrap(err, "bad parameter type")
return nil, errors.WithContextf(wrapped, "decoding type %v", t)
}
out, err := decodeTypes(t.GetReturnTypes())
if err != nil {
wrapped := errors.Wrap(err, "bad return type")
return nil, errors.WithContextf(wrapped, "decoding type %v", t)
}
return reflect.FuncOf(in, out, t.GetIsVariadic()), nil
case v1pb.Type_CHAN:
elm, err := decodeType(t.GetElement())
if err != nil {
wrapped := errors.Wrap(err, "bad element")
return nil, errors.WithContextf(wrapped, "decoding type %v", t)
}
dir, err := decodeChanDir(t.GetChanDir())
if err != nil {
wrapped := errors.Wrap(err, "bad channel direction")
return nil, errors.WithContextf(wrapped, "decoding type %v", t)
}
return reflect.ChanOf(dir, elm), nil
case v1pb.Type_PTR:
elm, err := decodeType(t.GetElement())
if err != nil {
wrapped := errors.Wrap(err, "bad element")
return nil, errors.WithContextf(wrapped, "decoding type %v", t)
}
return reflect.PtrTo(elm), nil
case v1pb.Type_SPECIAL:
ret, err := decodeSpecial(t.Special)
if err != nil {
wrapped := errors.Wrap(err, "bad element")
return nil, errors.WithContextf(wrapped, "decoding type %v", t)
}
return ret, nil
case v1pb.Type_EXTERNAL:
ret, ok := runtime.LookupType(t.ExternalKey)
if !ok {
err := errors.Errorf("external key not found %v", t.ExternalKey)
return nil, errors.WithContextf(err, "decoding type %v", t)
}
return ret, nil
default:
err := errors.Errorf("unexpected type kind %v", t.Kind)
return nil, errors.WithContextf(err, "failed to decode type %v", t)
}
}
func decodeSpecial(s v1pb.Type_Special) (reflect.Type, error) {
switch s {
case v1pb.Type_ERROR:
return reflectx.Error, nil
case v1pb.Type_CONTEXT:
return reflectx.Context, nil
case v1pb.Type_TYPE:
return reflectx.Type, nil
case v1pb.Type_EVENTTIME:
return typex.EventTimeType, nil
case v1pb.Type_WINDOW:
return typex.WindowType, nil
case v1pb.Type_KV:
return typex.KVType, nil
case v1pb.Type_COGBK:
return typex.CoGBKType, nil
case v1pb.Type_WINDOWEDVALUE:
return typex.WindowedValueType, nil
case v1pb.Type_T:
return typex.TType, nil
case v1pb.Type_U:
return typex.UType, nil
case v1pb.Type_V:
return typex.VType, nil
case v1pb.Type_W:
return typex.WType, nil
case v1pb.Type_X:
return typex.XType, nil
case v1pb.Type_Y:
return typex.YType, nil
case v1pb.Type_Z:
return typex.ZType, nil
default:
return nil, errors.Errorf("failed to decode special type, unknown type %v", s)
}
}
func decodeTypes(list []*v1pb.Type) ([]reflect.Type, error) {
var ret []reflect.Type
for _, elm := range list {
t, err := decodeType(elm)
if err != nil {
return nil, err
}
ret = append(ret, t)
}
return ret, nil
}
func encodeInts(offsets []int) []int32 {
var ret []int32
for _, elm := range offsets {
ret = append(ret, int32(elm))
}
return ret
}
func decodeInts(offsets []int32) []int {
var ret []int
for _, elm := range offsets {
ret = append(ret, int(elm))
}
return ret
}
func encodeChanDir(dir reflect.ChanDir) (v1pb.Type_ChanDir, error) {
switch dir {
case reflect.RecvDir:
return v1pb.Type_RECV, nil
case reflect.SendDir:
return v1pb.Type_SEND, nil
case reflect.BothDir:
return v1pb.Type_BOTH, nil
default:
err := errors.Errorf("invalid value: %v", dir)
return v1pb.Type_BOTH, errors.WithContextf(err, "encoding channel direction")
}
}
func decodeChanDir(dir v1pb.Type_ChanDir) (reflect.ChanDir, error) {
switch dir {
case v1pb.Type_RECV:
return reflect.RecvDir, nil
case v1pb.Type_SEND:
return reflect.SendDir, nil
case v1pb.Type_BOTH:
return reflect.BothDir, nil
default:
err := errors.Errorf("invalid value: %v", dir)
return reflect.BothDir, errors.WithContext(err, "decoding channel direction")
}
}
func encodeInputKind(k graph.InputKind) (v1pb.MultiEdge_Inbound_InputKind, error) {
switch k {
case graph.Main:
return v1pb.MultiEdge_Inbound_MAIN, nil
case graph.Singleton:
return v1pb.MultiEdge_Inbound_SINGLETON, nil
case graph.Slice:
return v1pb.MultiEdge_Inbound_SLICE, nil
case graph.Map:
return v1pb.MultiEdge_Inbound_MAP, nil
case graph.MultiMap:
return v1pb.MultiEdge_Inbound_MULTIMAP, nil
case graph.Iter:
return v1pb.MultiEdge_Inbound_ITER, nil
case graph.ReIter:
return v1pb.MultiEdge_Inbound_REITER, nil
default:
err := errors.Errorf("invalid value: %v", k)
return v1pb.MultiEdge_Inbound_MAIN, errors.WithContextf(err, "encoding input kind")
}
}
func decodeInputKind(k v1pb.MultiEdge_Inbound_InputKind) (graph.InputKind, error) {
switch k {
case v1pb.MultiEdge_Inbound_MAIN:
return graph.Main, nil
case v1pb.MultiEdge_Inbound_SINGLETON:
return graph.Singleton, nil
case v1pb.MultiEdge_Inbound_SLICE:
return graph.Slice, nil
case v1pb.MultiEdge_Inbound_MAP:
return graph.Map, nil
case v1pb.MultiEdge_Inbound_MULTIMAP:
return graph.MultiMap, nil
case v1pb.MultiEdge_Inbound_ITER:
return graph.Iter, nil
case v1pb.MultiEdge_Inbound_REITER:
return graph.ReIter, nil
default:
err := errors.Errorf("invalid value: %v", k)
return graph.Main, errors.WithContext(err, "decoding input kind")
}
}