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assignment.go
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assignment.go
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package librd
import (
"github.com/MyBudgetPtyLtd/kstream/v2/kafka"
"github.com/MyBudgetPtyLtd/kstream/v2/pkg/errors"
librdKafka "github.com/confluentinc/confluent-kafka-go/kafka"
)
type assignment struct {
resets map[kafka.TopicPartition]kafka.Offset
tps []librdKafka.TopicPartition
}
func toLibrd(o kafka.Offset) string {
switch o {
case kafka.OffsetEarliest:
return librdKafka.OffsetBeginning.String()
case kafka.OffsetLatest:
return librdKafka.OffsetEnd.String()
case kafka.OffsetStored:
return librdKafka.OffsetStored.String()
default:
return librdKafka.OffsetInvalid.String()
}
}
func (a *assignment) TPs() kafka.TopicPartitions {
var consumerTps []kafka.TopicPartition
for _, tp := range a.tps {
consumerTps = append(consumerTps, kafka.TopicPartition{
Topic: *tp.Topic,
Partition: tp.Partition,
})
}
return consumerTps
}
func (a *assignment) ResetOffset(tp kafka.TopicPartition, offset kafka.Offset) {
a.resets[tp] = offset
}
func newAssignment(tps []librdKafka.TopicPartition) *assignment {
asign := &assignment{
resets: map[kafka.TopicPartition]kafka.Offset{},
tps: tps,
}
return asign
}
func (a *assignment) toLibrd() ([]librdKafka.TopicPartition, error) {
// Apply offset resets
for i := range a.tps {
tp := a.tps[i]
if offset, ok := a.resets[kafka.TopicPartition{Topic: *tp.Topic, Partition: tp.Partition}]; ok && offset != kafka.OffsetStored {
librdOffset, err := librdKafka.NewOffset(toLibrd(offset))
if err != nil {
return nil, errors.Wrap(err, `Librd Offset set failed`)
}
tp.Offset = librdOffset
a.tps[i] = tp
}
}
return a.tps, nil
}