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72 lines
2.2 KiB
72 lines
2.2 KiB
// 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 ddl
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import (
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"context"
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"github.com/pingcap/parser/model"
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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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// Interceptor is used for DDL.
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type Interceptor interface {
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// OnGetInfoSchema is an intercept which is called in the function ddl.GetInfoSchema(). It is used in the tests.
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OnGetInfoSchema(ctx sessionctx.Context, is infoschema.InfoSchema) infoschema.InfoSchema
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}
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// BaseInterceptor implements Interceptor.
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type BaseInterceptor struct{}
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// OnGetInfoSchema implements Interceptor.OnGetInfoSchema interface.
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func (bi *BaseInterceptor) OnGetInfoSchema(ctx sessionctx.Context, is infoschema.InfoSchema) infoschema.InfoSchema {
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return is
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}
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// Callback is used for DDL.
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type Callback interface {
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// OnChanged is called after schema is changed.
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OnChanged(err error) error
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// OnJobRunBefore is called before running job.
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OnJobRunBefore(job *model.Job)
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// OnJobUpdated is called after the running job is updated.
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OnJobUpdated(job *model.Job)
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// OnWatched is called after watching owner is completed.
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OnWatched(ctx context.Context)
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}
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// BaseCallback implements Callback.OnChanged interface.
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type BaseCallback struct {
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}
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// OnChanged implements Callback interface.
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func (c *BaseCallback) OnChanged(err error) error {
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return err
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}
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// OnJobRunBefore implements Callback.OnJobRunBefore interface.
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func (c *BaseCallback) OnJobRunBefore(job *model.Job) {
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// Nothing to do.
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}
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// OnJobUpdated implements Callback.OnJobUpdated interface.
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func (c *BaseCallback) OnJobUpdated(job *model.Job) {
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// Nothing to do.
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}
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// OnWatched implements Callback.OnWatched interface.
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func (c *BaseCallback) OnWatched(ctx context.Context) {
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// Nothing to do.
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}
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