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package websockets
import (
flatbuffers "github.com/google/flatbuffers/go"
"github.com/spiral/errors"
"github.com/spiral/roadrunner/v2/pkg/pubsub/message"
"github.com/spiral/roadrunner/v2/plugins/logger"
)
// rpc collectors struct
type rpc struct {
plugin *Plugin
log logger.Logger
}
// Publish ... msg is a flatbuffers decoded payload
// see: pkg/pubsub/message.fbs
func (r *rpc) Publish(msg []byte, ok *bool) error {
const op = errors.Op("broadcast_publish")
r.log.Debug("message published")
// just return in case of nil message
if msg == nil {
*ok = true
return nil
}
fbsMsg := message.GetRootAsMessages(msg, 0)
tmpMsg := &message.Message{}
b := flatbuffers.NewBuilder(100)
for i := 0; i < fbsMsg.MessagesLength(); i++ {
// init a message
fbsMsg.Messages(tmpMsg, i)
// overhead HERE
orig := serializeMsg(b, tmpMsg)
bb := make([]byte, len(orig))
copy(bb, orig)
err := r.plugin.Publish(bb)
if err != nil {
*ok = false
b.Reset()
return errors.E(op, err)
}
b.Reset()
}
*ok = true
return nil
}
// PublishAsync ...
// see: pkg/pubsub/message.fbs
func (r *rpc) PublishAsync(msg []byte, ok *bool) error {
r.log.Debug("message published", "msg", msg)
// just return in case of nil message
if msg == nil {
*ok = true
return nil
}
fbsMsg := message.GetRootAsMessages(msg, 0)
tmpMsg := &message.Message{}
b := flatbuffers.NewBuilder(100)
for i := 0; i < fbsMsg.MessagesLength(); i++ {
// init a message
fbsMsg.Messages(tmpMsg, i)
// overhead HERE
orig := serializeMsg(b, tmpMsg)
bb := make([]byte, len(orig))
copy(bb, orig)
r.plugin.PublishAsync(bb)
b.Reset()
}
*ok = true
return nil
}
func serializeMsg(b *flatbuffers.Builder, msg *message.Message) []byte {
cmdOff := b.CreateByteString(msg.Command())
brokerOff := b.CreateByteString(msg.Broker())
offsets := make([]flatbuffers.UOffsetT, msg.TopicsLength())
for j := msg.TopicsLength() - 1; j >= 0; j-- {
offsets[j] = b.CreateByteString(msg.Topics(j))
}
message.MessageStartTopicsVector(b, len(offsets))
for j := len(offsets) - 1; j >= 0; j-- {
b.PrependUOffsetT(offsets[j])
}
tOff := b.EndVector(len(offsets))
bb := make([]byte, msg.PayloadLength())
for i := 0; i < msg.PayloadLength(); i++ {
bb[i] = byte(msg.Payload(i))
}
pOff := b.CreateByteVector(bb)
message.MessageStart(b)
message.MessageAddCommand(b, cmdOff)
message.MessageAddBroker(b, brokerOff)
message.MessageAddTopics(b, tOff)
message.MessageAddPayload(b, pOff)
fOff := message.MessageEnd(b)
b.Finish(fOff)
return b.FinishedBytes()
}
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