95 lines
2.8 KiB
Go
95 lines
2.8 KiB
Go
// Copyright 2019 The etcd Authors
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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 rafttest
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import (
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"testing"
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"github.com/cockroachdb/datadriven"
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"go.etcd.io/etcd/v3/raft"
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"go.etcd.io/etcd/v3/raft/raftpb"
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)
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func (env *InteractionEnv) handleProcessReady(t *testing.T, d datadriven.TestData) error {
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idx := firstAsNodeIdx(t, d)
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return env.ProcessReady(idx)
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}
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// ProcessReady runs Ready handling on the node with the given index.
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func (env *InteractionEnv) ProcessReady(idx int) error {
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// TODO(tbg): Allow simulating crashes here.
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rn, s := env.Nodes[idx].RawNode, env.Nodes[idx].Storage
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rd := rn.Ready()
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env.Output.WriteString(raft.DescribeReady(rd, defaultEntryFormatter))
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// TODO(tbg): the order of operations here is not necessarily safe. See:
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// https://github.com/etcd-io/etcd/pull/10861
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if !raft.IsEmptyHardState(rd.HardState) {
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if err := s.SetHardState(rd.HardState); err != nil {
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return err
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}
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}
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if err := s.Append(rd.Entries); err != nil {
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return err
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}
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if !raft.IsEmptySnap(rd.Snapshot) {
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if err := s.ApplySnapshot(rd.Snapshot); err != nil {
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return err
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}
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}
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for _, ent := range rd.CommittedEntries {
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var update []byte
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var cs *raftpb.ConfState
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switch ent.Type {
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case raftpb.EntryConfChange:
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var cc raftpb.ConfChange
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if err := cc.Unmarshal(ent.Data); err != nil {
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return err
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}
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update = cc.Context
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cs = rn.ApplyConfChange(cc)
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case raftpb.EntryConfChangeV2:
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var cc raftpb.ConfChangeV2
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if err := cc.Unmarshal(ent.Data); err != nil {
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return err
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}
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cs = rn.ApplyConfChange(cc)
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update = cc.Context
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default:
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update = ent.Data
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}
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// Record the new state by starting with the current state and applying
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// the command.
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lastSnap := env.Nodes[idx].History[len(env.Nodes[idx].History)-1]
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var snap raftpb.Snapshot
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snap.Data = append(snap.Data, lastSnap.Data...)
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// NB: this hard-codes an "appender" state machine.
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snap.Data = append(snap.Data, update...)
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snap.Metadata.Index = ent.Index
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snap.Metadata.Term = ent.Term
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if cs == nil {
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sl := env.Nodes[idx].History
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cs = &sl[len(sl)-1].Metadata.ConfState
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}
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snap.Metadata.ConfState = *cs
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env.Nodes[idx].History = append(env.Nodes[idx].History, snap)
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}
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for _, msg := range rd.Messages {
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env.Messages = append(env.Messages, msg)
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}
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rn.Advance(rd)
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return nil
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}
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