/
consumer.go
57 lines (47 loc) · 1.24 KB
/
consumer.go
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package haystack
import (
kinesis "github.com/sendgridlabs/go-kinesis"
"log"
)
func GetShardIterator(k *kinesis.Kinesis, streamName string, shardId string) string {
args := kinesis.NewArgs()
args.Add("StreamName", streamName)
args.Add("ShardId", shardId)
args.Add("ShardIteratorType", "TRIM_HORIZON")
a, _ := k.GetShardIterator(args)
return a.ShardIterator
}
func GetMessages(k *kinesis.Kinesis, streamName string, shardID string) (out [][]byte, ok bool) {
shardIterator := GetShardIterator(k, streamName, shardID)
for {
args := kinesis.NewArgs()
args.Add("ShardIterator", shardIterator)
recordResp, err := k.GetRecords(args)
if err == nil {
if len(recordResp.Records) > 0 {
for _, d := range recordResp.Records {
res, err := d.GetData()
if err != nil {
LogFile(err.Error())
}
//fmt.Printf("GetRecords Data: %v, err: %v\n", string(res), err)
out = append(out, res)
}
} else {
break
}
}
shardIterator = recordResp.NextShardIterator
}
return out, true
}
// StoreRecords is an example of a local store
func StoreRecords(records []byte) bool {
return true
}
// PrintRecords
func PrintRecords(records [][]byte) {
for a, b := range records {
log.Printf("%d: %s\n", a, string(b))
}
}