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|
package client
import (
"context"
"github.com/chrislusf/seaweedfs/weed/pb/messaging_pb"
)
type Publisher struct {
publishClient messaging_pb.SeaweedMessaging_PublishClient
}
func (mc *MessagingClient) NewPublisher(namespace, topic string) (*Publisher, error) {
stream, err := messaging_pb.NewSeaweedMessagingClient(mc.grpcConnection).Publish(context.Background())
if err != nil {
return nil, err
}
// send init message
err = stream.Send(&messaging_pb.PublishRequest{
Init: &messaging_pb.PublishRequest_InitMessage{
Namespace: namespace,
Topic: topic,
Partition: 0,
},
})
if err != nil {
return nil, err
}
// process init response
initResponse, err := stream.Recv()
if err != nil {
return nil, err
}
if initResponse.Redirect != nil {
// TODO follow redirection
}
if initResponse.Config != nil {
}
// setup looks for control messages
doneChan := make(chan error, 1)
go func() {
for {
in, err := stream.Recv()
if err != nil {
doneChan <- err
return
}
if in.Redirect != nil{
}
if in.Config != nil{
}
}
}()
return &Publisher{
publishClient: stream,
}, nil
}
func (p *Publisher) Publish(m *messaging_pb.RawData) error {
return p.publishClient.Send(&messaging_pb.PublishRequest{
Data: m,
})
}
func (p *Publisher) Shutdown() {
p.publishClient.CloseSend()
}
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