mirror of
https://github.com/etcd-io/etcd.git
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81 lines
2.2 KiB
Go
81 lines
2.2 KiB
Go
/*
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Copyright 2014 CoreOS, Inc.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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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 entryReader struct {
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r io.Reader
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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 newEntryReader(r io.Reader, id types.ID) *entryReader {
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return &entryReader{
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r: r,
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id: id,
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ents: metrics.GetMap("rafthttp.stream.entries_received").NewCounter(id.String()),
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bytes: metrics.GetMap("rafthttp.stream.bytes_received").NewCounter(id.String()),
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lastIndex: metrics.GetMap("rafthttp.stream.last_index_received").NewGauge(id.String()),
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}
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}
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func (er *entryReader) readEntries() ([]raftpb.Entry, error) {
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var l uint64
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if err := binary.Read(er.r, binary.BigEndian, &l); err != nil {
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return nil, err
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}
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er.bytes.AddBy(8)
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ents := make([]raftpb.Entry, int(l))
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for i := 0; i < int(l); i++ {
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if err := er.readEntry(&ents[i]); err != nil {
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return nil, err
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}
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er.ents.Add()
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}
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er.lastIndex.Set(int64(ents[l-1].Index))
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return ents, nil
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}
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func (er *entryReader) readEntry(ent *raftpb.Entry) error {
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var l uint64
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if err := binary.Read(er.r, binary.BigEndian, &l); err != nil {
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return err
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}
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buf := make([]byte, int(l))
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if _, err := io.ReadFull(er.r, buf); err != nil {
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return err
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}
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er.bytes.AddBy(8 + int64(l))
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return ent.Unmarshal(buf)
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}
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func (er *entryReader) stop() {
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metrics.GetMap("rafthttp.stream.entries_received").Delete(er.id.String())
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metrics.GetMap("rafthttp.stream.bytes_received").Delete(er.id.String())
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metrics.GetMap("rafthttp.stream.last_index_received").Delete(er.id.String())
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}
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