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producer.go
42 lines (34 loc) · 985 Bytes
/
producer.go
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package kafka
import (
"github.com/IBM/sarama"
)
type MessageMiddleware func(*sarama.ProducerMessage) *sarama.ProducerMessage
type SyncProducer struct {
sarama.SyncProducer
middlewares []MessageMiddleware
}
func NewSyncProducer(client sarama.Client, middlewares ...MessageMiddleware) (*SyncProducer, error) {
producer, err := sarama.NewSyncProducerFromClient(client)
if err != nil {
return nil, err
}
reverseSlice(middlewares)
return &SyncProducer{
SyncProducer: producer,
middlewares: middlewares,
}, nil
}
func (sp *SyncProducer) SendMessage(msg *sarama.ProducerMessage) (partition int32, offset int64, err error) {
for _, middleware := range sp.middlewares {
msg = middleware(msg)
}
return sp.SyncProducer.SendMessage(msg)
}
func (sp *SyncProducer) SendMessages(msgs []*sarama.ProducerMessage) error {
for _, msg := range msgs {
for _, middleware := range sp.middlewares {
msg = middleware(msg)
}
}
return sp.SyncProducer.SendMessages(msgs)
}