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producer.go
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producer.go
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package kafka
import (
"github.com/Shopify/sarama"
"github.com/funkygao/dbus/engine"
"github.com/funkygao/dbus/pkg/kafka"
"github.com/funkygao/dbus/pkg/model"
log "github.com/funkygao/log4go"
)
func (this *KafkaOutput) setupProducer(r engine.OutputRunner) *kafka.Producer {
cf := kafka.DefaultConfig()
cf.Sarama.Producer.Flush.Messages = r.Conf().Int("batch_size", 1024)
cf.Sarama.Producer.RequiredAcks = sarama.RequiredAcks(r.Conf().Int("ack", int(sarama.WaitForAll)))
switch r.Conf().String("mode", "async") {
case "sync":
cf.SyncMode()
case "async":
cf.AsyncMode()
case "dryrun":
cf.DryrunMode()
default:
panic("invalid KafkaOut mode")
}
// get the bootstrap broker list
zkzone := engine.Globals().GetOrRegisterZkzone(this.zone)
zkcluster := zkzone.NewCluster(this.cluster)
producer := kafka.NewProducer(r.Conf().String("name", "undefined"), zkcluster.BrokerList(), cf)
switch r.Conf().String("qos", "LossTolerant") {
case "LossTolerant":
cf.LossTolerant()
producer.SetErrorHandler(func(err *sarama.ProducerError) {
// e,g.
// kafka: Failed to produce message to topic dbustest: kafka server: Message was too large, server rejected it to avoid allocation error.
// kafka server: Unexpected (unknown?) server error.
// java.lang.OutOfMemoryError: Direct buffer memory
row := err.Msg.Value.(*model.RowsEvent)
log.Error("[%s.%s.%s] %s %s", this.zone, this.cluster, this.topic, err, row.MetaInfo())
})
producer.SetSuccessHandler(func(msg *sarama.ProducerMessage) {
// FIXME what if:
// [1, 2, 3, 4, 5] sent
// [1, 2, 4, 5] ok, [3] fails
// then shutdown dbusd? 3 might be lost
pack := msg.Metadata.(*engine.Packet)
if err := r.Ack(pack); err != nil {
row := msg.Value.(*model.RowsEvent)
log.Error("[%s.%s.%s] {%s} %v", this.zone, this.cluster, this.topic, row, err)
}
// safe to recycle
// FIXME delayed recycle will block input channel, so currently let input chan bigger than batch size
pack.Recycle()
})
case "ThroughputFirst":
cf.ThroughputFirst()
default:
panic("invalid qos")
}
return producer
}