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package wdclient
import ( "bufio" "bytes" "fmt" "github.com/seaweedfs/seaweedfs/weed/glog" "github.com/seaweedfs/seaweedfs/weed/pb" "github.com/seaweedfs/seaweedfs/weed/util" "github.com/seaweedfs/seaweedfs/weed/wdclient/net2" "io" "net" "time" )
// VolumeTcpClient put/get/delete file chunks directly on volume servers without replication
type VolumeTcpClient struct { cp net2.ConnectionPool }
type VolumeTcpConn struct { net.Conn bufWriter *bufio.Writer bufReader *bufio.Reader }
func NewVolumeTcpClient() *VolumeTcpClient { MaxIdleTime := 10 * time.Second return &VolumeTcpClient{ cp: net2.NewMultiConnectionPool(net2.ConnectionOptions{ MaxActiveConnections: 16, MaxIdleConnections: 1, MaxIdleTime: &MaxIdleTime, DialMaxConcurrency: 0, Dial: func(network string, address string) (net.Conn, error) { conn, err := net.Dial(network, address) return &VolumeTcpConn{ conn, bufio.NewWriter(conn), bufio.NewReader(conn), }, err }, NowFunc: nil, ReadTimeout: 0, WriteTimeout: 0, }), } } func (c *VolumeTcpClient) PutFileChunk(volumeServerAddress string, fileId string, fileSize uint32, fileReader io.Reader) (err error) {
tcpAddress, parseErr := pb.ParseServerAddress(volumeServerAddress, 20000) if parseErr != nil { return parseErr }
c.cp.Register("tcp", tcpAddress) tcpConn, getErr := c.cp.Get("tcp", tcpAddress) if getErr != nil { return fmt.Errorf("get connection to %s: %v", tcpAddress, getErr) } conn := tcpConn.RawConn().(*VolumeTcpConn) defer func() { if err != nil { tcpConn.DiscardConnection() } else { tcpConn.ReleaseConnection() } }()
buf := []byte("+" + fileId + "\n") _, err = conn.bufWriter.Write([]byte(buf)) if err != nil { return } util.Uint32toBytes(buf[0:4], fileSize) _, err = conn.bufWriter.Write(buf[0:4]) if err != nil { return } _, err = io.Copy(conn.bufWriter, fileReader) if err != nil { return } conn.bufWriter.Write([]byte("!\n")) conn.bufWriter.Flush()
ret, _, err := conn.bufReader.ReadLine() if err != nil { glog.V(0).Infof("upload by tcp: %v", err) return } if !bytes.HasPrefix(ret, []byte("+OK")) { glog.V(0).Infof("upload by tcp: %v", string(ret)) }
return nil }
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