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/
tcp_session.go
96 lines (78 loc) · 2.05 KB
/
tcp_session.go
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// Copyright 2020 The VectorSQL Authors.
//
// Code is licensed under Apache License, Version 2.0.
package tcp
import (
"expvar"
"net"
"time"
"datablocks"
"datastreams"
"sessions"
"base/binary"
"base/errors"
"base/metric"
"servers/protocol"
)
type TCPSession struct {
conn net.Conn
hello *protocol.HelloProtocol
reader *binary.Reader
writer *binary.Writer
session *sessions.Session
}
func NewTCPSession(conn net.Conn) *TCPSession {
return &TCPSession{
conn: conn,
reader: binary.NewReader(conn),
writer: binary.NewWriter(conn),
session: sessions.NewSession(),
}
}
func (session *TCPSession) Close() {
session.conn.Close()
session.session.Close()
}
func (session *TCPSession) sendException(x error, withStack bool) error {
writer := session.writer
if err := protocol.WriteExceptionResponse(writer, x, withStack); err != nil {
return err
}
return session.flush()
}
func (session *TCPSession) sendProgress() error {
writer := session.writer
if err := protocol.WriteProgressResponse(writer, session.session.GetProgress(), session.hello.ClientRevision); err != nil {
return err
}
return nil
}
func (session *TCPSession) sendData(block *datablocks.DataBlock) error {
defer expvar.Get(metric_tcp_datablock_send_sec).(metric.Metric).Record(time.Now())
writer := session.writer
output := datastreams.NewNativeBlockOutputStream(block.Clone(), writer)
if err := writer.Uvarint(uint64(protocol.ServerData)); err != nil {
return errors.Wrapf(err, "Couldn't write query header")
}
if err := writer.String(""); err != nil {
return err
}
if err := output.Write(block); err != nil {
return err
}
return nil
}
func (session *TCPSession) sendEndOfStream() error {
writer := session.writer
if err := writer.Uvarint(uint64(protocol.ServerEndOfStream)); err != nil {
return errors.Wrapf(err, "Couldn't write ServerEndOfStream")
}
return session.flush()
}
func (session *TCPSession) flush() error {
writer := session.writer
if err := writer.Flush(); err != nil {
return errors.Wrapf(err, "Couldn't flush")
}
return nil
}