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269 lines
5.2 KiB
269 lines
5.2 KiB
// Copyright 2016 PingCAP, 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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// See the License for the specific language governing permissions and
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// limitations under the License.
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package kv
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import (
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"context"
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"github.com/pingcap/tidb/kv/memdb"
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"github.com/pingcap/tidb/store/tikv/oracle"
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)
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// mockTxn is a txn that returns a retryAble error when called Commit.
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type mockTxn struct {
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opts map[Option]interface{}
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valid bool
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}
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// Commit always returns a retryable error.
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func (t *mockTxn) Commit(ctx context.Context) error {
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return ErrTxnRetryable
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}
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func (t *mockTxn) Rollback() error {
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t.valid = false
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return nil
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}
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func (t *mockTxn) String() string {
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return ""
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}
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func (t *mockTxn) LockKeys(_ context.Context, _ *LockCtx, _ ...Key) error {
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return nil
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}
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func (t *mockTxn) SetOption(opt Option, val interface{}) {
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t.opts[opt] = val
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}
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func (t *mockTxn) DelOption(opt Option) {
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delete(t.opts, opt)
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}
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func (t *mockTxn) GetOption(opt Option) interface{} {
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return t.opts[opt]
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}
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func (t *mockTxn) IsReadOnly() bool {
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return true
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}
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func (t *mockTxn) StartTS() uint64 {
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return uint64(0)
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}
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func (t *mockTxn) Get(ctx context.Context, k Key) ([]byte, error) {
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return nil, nil
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}
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func (t *mockTxn) BatchGet(ctx context.Context, keys []Key) (map[string][]byte, error) {
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return nil, nil
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}
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func (t *mockTxn) Iter(k Key, upperBound Key) (Iterator, error) {
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return nil, nil
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}
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func (t *mockTxn) IterReverse(k Key) (Iterator, error) {
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return nil, nil
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}
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func (t *mockTxn) Set(k Key, v []byte) error {
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return nil
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}
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func (t *mockTxn) Delete(k Key) error {
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return nil
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}
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func (t *mockTxn) Valid() bool {
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return t.valid
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}
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func (t *mockTxn) Len() int {
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return 0
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}
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func (t *mockTxn) Size() int {
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return 0
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}
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func (t *mockTxn) GetMemBuffer() MemBuffer {
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return nil
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}
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func (t *mockTxn) GetMemBufferSnapshot() MemBuffer {
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return nil
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}
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func (t *mockTxn) GetSnapshot() Snapshot {
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return nil
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}
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func (t *mockTxn) NewStagingBuffer() MemBuffer {
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return nil
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}
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func (t *mockTxn) Flush() (int, error) {
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return 0, nil
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}
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func (t *mockTxn) Discard() {
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}
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func (t *mockTxn) Reset() {
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t.valid = false
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}
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func (t *mockTxn) SetVars(vars *Variables) {
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}
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func (t *mockTxn) GetVars() *Variables {
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return nil
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}
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func (t *mockTxn) ResetStmtKeyExistErrs() {
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}
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func (t *mockTxn) MergeStmtKeyExistErrs() {
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}
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func (t *mockTxn) DeleteWithNeedLock(k Key) error {
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return t.Delete(k)
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}
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func (t *mockTxn) GetFlags(ctx context.Context, k Key) memdb.KeyFlags {
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return 0
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}
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// NewMockTxn new a mockTxn.
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func NewMockTxn() Transaction {
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return &mockTxn{
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opts: make(map[Option]interface{}),
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valid: true,
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}
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}
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// mockStorage is used to start a must commit-failed txn.
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type mockStorage struct {
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}
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func (s *mockStorage) Begin() (Transaction, error) {
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return NewMockTxn(), nil
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}
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func (*mockTxn) IsPessimistic() bool {
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return false
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}
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// BeginWithStartTS begins a transaction with startTS.
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func (s *mockStorage) BeginWithStartTS(startTS uint64) (Transaction, error) {
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return s.Begin()
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}
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func (s *mockStorage) GetSnapshot(ver Version) (Snapshot, error) {
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return &mockSnapshot{
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store: NewMemDbBuffer(),
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}, nil
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}
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func (s *mockStorage) Close() error {
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return nil
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}
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func (s *mockStorage) UUID() string {
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return ""
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}
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// CurrentVersion returns current max committed version.
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func (s *mockStorage) CurrentVersion() (Version, error) {
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return NewVersion(1), nil
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}
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func (s *mockStorage) GetClient() Client {
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return nil
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}
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func (s *mockStorage) GetOracle() oracle.Oracle {
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return nil
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}
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func (s *mockStorage) SupportDeleteRange() (supported bool) {
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return false
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}
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func (s *mockStorage) Name() string {
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return "KVMockStorage"
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}
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func (s *mockStorage) Describe() string {
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return "KVMockStorage is a mock Store implementation, only for unittests in KV package"
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}
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func (s *mockStorage) ShowStatus(ctx context.Context, key string) (interface{}, error) {
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return nil, nil
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}
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// MockTxn is used for test cases that need more interfaces than Transaction.
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type MockTxn interface {
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Transaction
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GetOption(opt Option) interface{}
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}
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// NewMockStorage creates a new mockStorage.
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func NewMockStorage() Storage {
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return &mockStorage{}
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}
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type mockSnapshot struct {
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store MemBuffer
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}
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func (s *mockSnapshot) Get(ctx context.Context, k Key) ([]byte, error) {
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return s.store.Get(ctx, k)
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}
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func (s *mockSnapshot) SetPriority(priority int) {
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}
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func (s *mockSnapshot) BatchGet(ctx context.Context, keys []Key) (map[string][]byte, error) {
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m := make(map[string][]byte, len(keys))
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for _, k := range keys {
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v, err := s.store.Get(ctx, k)
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if IsErrNotFound(err) {
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continue
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}
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if err != nil {
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return nil, err
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}
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m[string(k)] = v
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}
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return m, nil
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}
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func (s *mockSnapshot) Iter(k Key, upperBound Key) (Iterator, error) {
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return s.store.Iter(k, upperBound)
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}
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func (s *mockSnapshot) IterReverse(k Key) (Iterator, error) {
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return s.store.IterReverse(k)
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}
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func (s *mockSnapshot) SetOption(opt Option, val interface{}) {}
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func (s *mockSnapshot) DelOption(opt Option) {}
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