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112 lines
3.2 KiB
112 lines
3.2 KiB
// Copyright 2018 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 mockstore
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import (
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"net/url"
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"strings"
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"github.com/pingcap/errors"
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"github.com/pingcap/tidb/config"
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"github.com/pingcap/tidb/kv"
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"github.com/pingcap/tidb/store/mockstore/mocktikv"
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"github.com/pingcap/tidb/store/tikv"
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"github.com/tikv/pd/client"
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)
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// MockDriver is in memory mock TiKV driver.
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type MockDriver struct {
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}
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// Open creates a MockTiKV storage.
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func (d MockDriver) Open(path string) (kv.Storage, error) {
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u, err := url.Parse(path)
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if err != nil {
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return nil, errors.Trace(err)
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}
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if !strings.EqualFold(u.Scheme, "mocktikv") {
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return nil, errors.Errorf("Uri scheme expected(mocktikv) but found (%s)", u.Scheme)
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}
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opts := []MockTiKVStoreOption{WithPath(u.Path)}
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txnLocalLatches := config.GetGlobalConfig().TxnLocalLatches
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if txnLocalLatches.Enabled {
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opts = append(opts, WithTxnLocalLatches(txnLocalLatches.Capacity))
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}
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return NewMockTikvStore(opts...)
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}
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type mockOptions struct {
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cluster *mocktikv.Cluster
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mvccStore mocktikv.MVCCStore
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clientHijack func(tikv.Client) tikv.Client
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pdClientHijack func(pd.Client) pd.Client
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path string
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txnLocalLatches uint
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}
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// MockTiKVStoreOption is used to control some behavior of mock tikv.
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type MockTiKVStoreOption func(*mockOptions)
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// WithHijackClient hijacks KV client's behavior, makes it easy to simulate the network
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// problem between TiDB and TiKV.
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func WithHijackClient(wrap func(tikv.Client) tikv.Client) MockTiKVStoreOption {
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return func(c *mockOptions) {
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c.clientHijack = wrap
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}
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}
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// WithCluster provides the customized cluster.
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func WithCluster(cluster *mocktikv.Cluster) MockTiKVStoreOption {
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return func(c *mockOptions) {
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c.cluster = cluster
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}
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}
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// WithMVCCStore provides the customized mvcc store.
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func WithMVCCStore(store mocktikv.MVCCStore) MockTiKVStoreOption {
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return func(c *mockOptions) {
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c.mvccStore = store
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}
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}
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// WithPath specifies the mocktikv path.
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func WithPath(path string) MockTiKVStoreOption {
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return func(c *mockOptions) {
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c.path = path
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}
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}
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// WithTxnLocalLatches enable txnLocalLatches, when capacity > 0.
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func WithTxnLocalLatches(capacity uint) MockTiKVStoreOption {
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return func(c *mockOptions) {
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c.txnLocalLatches = capacity
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}
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}
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// NewMockTikvStore creates a mocked tikv store, the path is the file path to store the data.
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// If path is an empty string, a memory storage will be created.
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func NewMockTikvStore(options ...MockTiKVStoreOption) (kv.Storage, error) {
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var opt mockOptions
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for _, f := range options {
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f(&opt)
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}
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client, pdClient, err := mocktikv.NewTiKVAndPDClient(opt.cluster, opt.mvccStore, opt.path)
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if err != nil {
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return nil, errors.Trace(err)
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}
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return tikv.NewTestTiKVStore(client, pdClient, opt.clientHijack, opt.pdClientHijack, opt.txnLocalLatches)
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}
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