etcd/rafthttp/entry_writer.go
2015-02-28 11:16:41 -08:00

66 lines
1.4 KiB
Go

// Copyright 2015 CoreOS, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package rafthttp
import (
"encoding/binary"
"io"
"github.com/coreos/etcd/pkg/types"
"github.com/coreos/etcd/raft/raftpb"
)
type entryWriter struct {
w io.Writer
id types.ID
}
func newEntryWriter(w io.Writer, id types.ID) *entryWriter {
ew := &entryWriter{
w: w,
id: id,
}
return ew
}
func (ew *entryWriter) writeEntries(ents []raftpb.Entry) error {
l := len(ents)
if l == 0 {
return nil
}
if err := binary.Write(ew.w, binary.BigEndian, uint64(l)); err != nil {
return err
}
for i := 0; i < l; i++ {
if err := ew.writeEntry(&ents[i]); err != nil {
return err
}
}
return nil
}
func (ew *entryWriter) writeEntry(ent *raftpb.Entry) error {
size := ent.Size()
if err := binary.Write(ew.w, binary.BigEndian, uint64(size)); err != nil {
return err
}
b, err := ent.Marshal()
if err != nil {
return err
}
_, err = ew.w.Write(b)
return err
}