micro/server/rpc_stream.go

105 lines
1.7 KiB
Go
Raw Normal View History

2015-12-17 23:37:35 +03:00
package server
import (
2018-03-03 14:53:52 +03:00
"context"
2019-08-15 17:22:53 +03:00
"errors"
"io"
2015-12-17 23:37:35 +03:00
"sync"
2019-01-08 18:38:25 +03:00
"github.com/micro/go-micro/v2/codec"
2015-12-17 23:37:35 +03:00
)
2015-12-18 04:01:59 +03:00
// Implements the Streamer interface
2015-12-17 23:37:35 +03:00
type rpcStream struct {
sync.RWMutex
2019-01-08 18:38:25 +03:00
id string
2015-12-17 23:37:35 +03:00
closed bool
err error
request Request
2019-01-08 18:38:25 +03:00
codec codec.Codec
2015-12-17 23:37:35 +03:00
context context.Context
}
func (r *rpcStream) Context() context.Context {
return r.context
}
func (r *rpcStream) Request() Request {
return r.request
}
func (r *rpcStream) Send(msg interface{}) error {
r.Lock()
defer r.Unlock()
2019-01-08 18:38:25 +03:00
resp := codec.Message{
2019-01-18 13:12:57 +03:00
Target: r.request.Service(),
Method: r.request.Method(),
2019-01-11 00:25:31 +03:00
Endpoint: r.request.Endpoint(),
Id: r.id,
Type: codec.Response,
2015-12-17 23:37:35 +03:00
}
2019-06-03 17:55:47 +03:00
if err := r.codec.Write(&resp, msg); err != nil {
r.err = err
}
return nil
2015-12-17 23:37:35 +03:00
}
func (r *rpcStream) Recv(msg interface{}) error {
2019-01-08 18:38:25 +03:00
req := new(codec.Message)
req.Type = codec.Request
2015-12-17 23:37:35 +03:00
err := r.codec.ReadHeader(req, req.Type)
r.Lock()
defer r.Unlock()
if err != nil {
2015-12-17 23:37:35 +03:00
// discard body
2019-01-07 21:20:47 +03:00
r.codec.ReadBody(nil)
2019-06-03 17:55:47 +03:00
r.err = err
2015-12-17 23:37:35 +03:00
return err
}
2019-08-15 17:22:53 +03:00
// check the error
if len(req.Error) > 0 {
// Check the client closed the stream
switch req.Error {
case lastStreamResponseError.Error():
// discard body
r.Unlock()
2019-08-15 17:22:53 +03:00
r.codec.ReadBody(nil)
r.Lock()
2019-08-15 17:22:53 +03:00
r.err = io.EOF
return io.EOF
default:
return errors.New(req.Error)
}
}
2016-04-06 19:53:16 +03:00
// we need to stay up to date with sequence numbers
2019-01-08 18:38:25 +03:00
r.id = req.Id
r.Unlock()
err = r.codec.ReadBody(msg)
r.Lock()
if err != nil {
2019-06-03 17:55:47 +03:00
r.err = err
return err
}
return nil
2015-12-17 23:37:35 +03:00
}
func (r *rpcStream) Error() error {
r.RLock()
defer r.RUnlock()
return r.err
}
func (r *rpcStream) Close() error {
r.Lock()
defer r.Unlock()
r.closed = true
return r.codec.Close()
}