mirror of
https://github.com/etcd-io/etcd.git
synced 2024-09-27 06:25:44 +00:00
75 lines
2.2 KiB
Go
75 lines
2.2 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/Godeps/_workspace/src/github.com/codahale/metrics"
|
|
"github.com/coreos/etcd/pkg/types"
|
|
"github.com/coreos/etcd/raft/raftpb"
|
|
)
|
|
|
|
type entryReader struct {
|
|
r io.Reader
|
|
id types.ID
|
|
}
|
|
|
|
func newEntryReader(r io.Reader, id types.ID) *entryReader {
|
|
return &entryReader{
|
|
r: r,
|
|
id: id,
|
|
}
|
|
}
|
|
|
|
func (er *entryReader) readEntries() ([]raftpb.Entry, error) {
|
|
var l uint64
|
|
if err := binary.Read(er.r, binary.BigEndian, &l); err != nil {
|
|
return nil, err
|
|
}
|
|
metrics.Counter("rafthttp.stream.bytes_received." + er.id.String()).AddN(8)
|
|
ents := make([]raftpb.Entry, int(l))
|
|
for i := 0; i < int(l); i++ {
|
|
if err := er.readEntry(&ents[i]); err != nil {
|
|
return nil, err
|
|
}
|
|
metrics.Counter("rafthttp.stream.entries_received." + er.id.String()).AddN(8)
|
|
}
|
|
if l > 0 {
|
|
metrics.Gauge("rafthttp.stream.last_index_received." + er.id.String()).Set(int64(ents[l-1].Index))
|
|
}
|
|
return ents, nil
|
|
}
|
|
|
|
func (er *entryReader) readEntry(ent *raftpb.Entry) error {
|
|
var l uint64
|
|
if err := binary.Read(er.r, binary.BigEndian, &l); err != nil {
|
|
return err
|
|
}
|
|
buf := make([]byte, int(l))
|
|
if _, err := io.ReadFull(er.r, buf); err != nil {
|
|
return err
|
|
}
|
|
metrics.Counter("rafthttp.stream.bytes_received." + er.id.String()).AddN(8 + uint64(l))
|
|
return ent.Unmarshal(buf)
|
|
}
|
|
|
|
func (er *entryReader) stop() {
|
|
metrics.Counter("rafthttp.stream.bytes_received." + er.id.String()).Remove()
|
|
metrics.Counter("rafthttp.stream.entries_received." + er.id.String()).Remove()
|
|
metrics.Gauge("rafthttp.stream.last_index_received." + er.id.String()).Remove()
|
|
}
|