529ce88c1c
* *: add TxnManager to manage txn in session * modify * add tests * move failpoint content to a single file
60 lines
2.0 KiB
Go
60 lines
2.0 KiB
Go
// Copyright 2021 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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// 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 sessiontxn
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import (
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"github.com/pingcap/tidb/infoschema"
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"github.com/pingcap/tidb/sessionctx"
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)
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// TxnContextProvider provides txn context
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type TxnContextProvider interface {
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// Initialize the provider with session context
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Initialize(sctx sessionctx.Context) error
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// GetTxnInfoSchema returns the information schema used by txn
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GetTxnInfoSchema() infoschema.InfoSchema
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}
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// SimpleTxnContextProvider implements TxnContextProvider
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// It is only used in refactor stage
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// TODO: remove it after refactor finished
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type SimpleTxnContextProvider struct {
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InfoSchema infoschema.InfoSchema
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}
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// Initialize the provider with session context
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func (p *SimpleTxnContextProvider) Initialize(_ sessionctx.Context) error {
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return nil
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}
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// GetTxnInfoSchema returns the information schema used by txn
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func (p *SimpleTxnContextProvider) GetTxnInfoSchema() infoschema.InfoSchema {
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return p.InfoSchema
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}
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// TxnManager is an interface providing txn context management in session
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type TxnManager interface {
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// GetTxnInfoSchema returns the information schema used by txn
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GetTxnInfoSchema() infoschema.InfoSchema
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// GetContextProvider returns the current TxnContextProvider
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GetContextProvider() TxnContextProvider
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// SetContextProvider sets the context provider
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SetContextProvider(provider TxnContextProvider) error
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}
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// GetTxnManager returns the TxnManager object from session context
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var GetTxnManager func(sctx sessionctx.Context) TxnManager
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