83 lines
2.2 KiB
Go
83 lines
2.2 KiB
Go
// Copyright 2015 CoreOS, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package rafthttp
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import (
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"encoding/binary"
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"io"
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"github.com/coreos/etcd/pkg/metrics"
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"github.com/coreos/etcd/pkg/types"
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"github.com/coreos/etcd/raft/raftpb"
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)
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type entryWriter struct {
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w io.Writer
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id types.ID
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ents *metrics.Counter
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bytes *metrics.Counter
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lastIndex *metrics.Gauge
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}
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func newEntryWriter(w io.Writer, id types.ID) *entryWriter {
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ew := &entryWriter{
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w: w,
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id: id,
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ents: metrics.GetMap("rafthttp.stream.entries_sent").NewCounter(id.String()),
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bytes: metrics.GetMap("rafthttp.stream.bytes_sent").NewCounter(id.String()),
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lastIndex: metrics.GetMap("rafthttp.stream.last_index_sent").NewGauge(id.String()),
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}
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return ew
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}
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func (ew *entryWriter) writeEntries(ents []raftpb.Entry) error {
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l := len(ents)
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if l == 0 {
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return nil
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}
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if err := binary.Write(ew.w, binary.BigEndian, uint64(l)); err != nil {
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return err
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}
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ew.bytes.AddBy(8)
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for i := 0; i < l; i++ {
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if err := ew.writeEntry(&ents[i]); err != nil {
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return err
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}
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ew.ents.Add()
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}
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ew.lastIndex.Set(int64(ents[l-1].Index))
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return nil
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}
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func (ew *entryWriter) writeEntry(ent *raftpb.Entry) error {
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size := ent.Size()
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if err := binary.Write(ew.w, binary.BigEndian, uint64(size)); err != nil {
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return err
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}
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b, err := ent.Marshal()
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if err != nil {
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return err
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}
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_, err = ew.w.Write(b)
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ew.bytes.AddBy(8 + int64(size))
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return err
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}
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func (ew *entryWriter) stop() {
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metrics.GetMap("rafthttp.stream.entries_sent").Delete(ew.id.String())
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metrics.GetMap("rafthttp.stream.bytes_sent").Delete(ew.id.String())
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metrics.GetMap("rafthttp.stream.last_index_sent").Delete(ew.id.String())
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}
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