50 lines
1.5 KiB
Go
50 lines
1.5 KiB
Go
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// Copyright 2015 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 autocommit
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import (
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"github.com/pingcap/tidb/context"
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)
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// Checker is the interface checks if it should autocommit in the context.
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// TODO: Choose a better name.
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type Checker interface {
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// ShouldAutocommit returns true if it should autocommit in the context.
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ShouldAutocommit(ctx context.Context) bool
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}
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// keyType is a dummy type to avoid naming collision in context.
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type keyType int
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// String defines a Stringer function for debugging and pretty printing.
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func (k keyType) String() string {
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return "autocommit_checker"
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}
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const key keyType = 0
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// BindAutocommitChecker binds autocommit checker to context.
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func BindAutocommitChecker(ctx context.Context, checker Checker) {
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ctx.SetValue(key, checker)
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}
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// ShouldAutocommit gets checker from ctx and checks if it should autocommit.
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func ShouldAutocommit(ctx context.Context) bool {
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v, ok := ctx.Value(key).(Checker)
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if !ok {
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panic("Miss autocommit checker")
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}
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return v.ShouldAutocommit(ctx)
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}
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