forked from stellar/go
/
change_processors.go
63 lines (56 loc) · 1.21 KB
/
change_processors.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
package processors
import (
"context"
"io"
"github.com/stellar/go/ingest"
"github.com/stellar/go/support/errors"
)
type ChangeProcessor interface {
ProcessChange(ctx context.Context, change ingest.Change) error
}
type LedgerTransactionProcessor interface {
ProcessTransaction(ctx context.Context, transaction ingest.LedgerTransaction) error
}
func StreamLedgerTransactions(
ctx context.Context,
txProcessor LedgerTransactionProcessor,
reader *ingest.LedgerTransactionReader,
) error {
for {
tx, err := reader.Read()
if err == io.EOF {
return nil
}
if err != nil {
return errors.Wrap(err, "could not read transaction")
}
if err = txProcessor.ProcessTransaction(ctx, tx); err != nil {
return errors.Wrapf(
err,
"could not process transaction %v",
tx.Index,
)
}
}
}
func StreamChanges(
ctx context.Context,
changeProcessor ChangeProcessor,
reader ingest.ChangeReader,
) error {
for {
change, err := reader.Read()
if err == io.EOF {
return nil
}
if err != nil {
return errors.Wrap(err, "could not read transaction")
}
if err = changeProcessor.ProcessChange(ctx, change); err != nil {
return errors.Wrap(
err,
"could not process change",
)
}
}
}