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0d88e0d111
msgappv2 stream is used to send all MsgApp, and replaces the functionality of msgapp stream. Compared to v1, it has several advantanges: 1. The output message is exactly the same with the input one, which cannot be done in v1. 2. It uses one connection to stream persistently, which prevents message reorder and saves the time to request stream. 3. It transmits 10 addiontional bytes in the procedure of committing one proposal, which is trivia for idle time. 4. It transmits less bytes when committing mutliple proposals or keep committing proposals.
124 lines
2.8 KiB
Go
124 lines
2.8 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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"bytes"
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"reflect"
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"testing"
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"github.com/coreos/etcd/etcdserver/stats"
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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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func TestMsgAppV2(t *testing.T) {
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tests := []raftpb.Message{
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linkHeartbeatMessage,
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{
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Type: raftpb.MsgApp,
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From: 1,
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To: 2,
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Term: 1,
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LogTerm: 1,
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Index: 0,
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Entries: []raftpb.Entry{
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{Term: 1, Index: 1, Data: []byte("some data")},
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{Term: 1, Index: 2, Data: []byte("some data")},
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{Term: 1, Index: 3, Data: []byte("some data")},
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},
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},
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// consecutive MsgApp
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{
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Type: raftpb.MsgApp,
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From: 1,
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To: 2,
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Term: 1,
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LogTerm: 1,
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Index: 3,
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Entries: []raftpb.Entry{
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{Term: 1, Index: 4, Data: []byte("some data")},
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},
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},
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linkHeartbeatMessage,
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// consecutive MsgApp after linkHeartbeatMessage
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{
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Type: raftpb.MsgApp,
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From: 1,
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To: 2,
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Term: 1,
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LogTerm: 1,
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Index: 4,
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Entries: []raftpb.Entry{
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{Term: 1, Index: 5, Data: []byte("some data")},
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},
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},
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// MsgApp with higher term
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{
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Type: raftpb.MsgApp,
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From: 1,
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To: 2,
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Term: 3,
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LogTerm: 1,
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Index: 5,
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Entries: []raftpb.Entry{
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{Term: 3, Index: 6, Data: []byte("some data")},
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},
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},
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linkHeartbeatMessage,
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// consecutive MsgApp
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{
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Type: raftpb.MsgApp,
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From: 1,
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To: 2,
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Term: 3,
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LogTerm: 2,
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Index: 6,
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Entries: []raftpb.Entry{
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{Term: 3, Index: 7, Data: []byte("some data")},
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},
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},
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// consecutive empty MsgApp
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{
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Type: raftpb.MsgApp,
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From: 1,
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To: 2,
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Term: 3,
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LogTerm: 2,
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Index: 7,
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Entries: nil,
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},
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linkHeartbeatMessage,
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}
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b := &bytes.Buffer{}
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enc := &msgAppV2Encoder{w: b, fs: &stats.FollowerStats{}}
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dec := &msgAppV2Decoder{r: b, local: types.ID(2), remote: types.ID(1)}
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for i, tt := range tests {
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if err := enc.encode(tt); err != nil {
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t.Errorf("#%d: unexpected encode message error: %v", i, err)
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continue
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}
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m, err := dec.decode()
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if err != nil {
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t.Errorf("#%d: unexpected decode message error: %v", i, err)
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continue
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}
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if !reflect.DeepEqual(m, tt) {
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t.Errorf("#%d: message = %+v, want %+v", i, m, tt)
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}
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}
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}
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