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optimize: add some todo comment, add a undo hook sample (apache#238)
add some todo comment, add a undo hook sample
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,38 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You under the Apache License, Version 2.0 | ||
| * (the "License"); you may not use this file except in compliance with | ||
| * the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
||
| package exec | ||
|
|
||
| import ( | ||
| "context" | ||
|
|
||
| "github.com/seata/seata-go/pkg/datasource/sql/exec" | ||
| "github.com/seata/seata-go/pkg/datasource/sql/types" | ||
| ) | ||
|
|
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| type BasicUndoBuilder struct { | ||
| } | ||
|
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| // buildRowImages build row iamge by exec condition | ||
| func (u *BasicUndoBuilder) buildRowImages(ctx context.Context, execCtx *exec.ExecContext) ([]*types.RowImage, error) { | ||
| panic("implement me") | ||
| } | ||
|
|
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| // buildRowImages query db table to find data image | ||
| func (u *BasicUndoBuilder) buildRecordImage(ctx context.Context, execCtx *exec.ExecContext) ([]*types.RecordImage, error) { | ||
| panic("implement me") | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,55 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You under the Apache License, Version 2.0 | ||
| * (the "License"); you may not use this file except in compliance with | ||
| * the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
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| package exec | ||
|
|
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| import ( | ||
| "context" | ||
|
|
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| "github.com/seata/seata-go/pkg/common/log" | ||
| "github.com/seata/seata-go/pkg/datasource/sql/exec" | ||
| "github.com/seata/seata-go/pkg/datasource/sql/types" | ||
| ) | ||
|
|
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| // UpdateUndoHook build image when update executed | ||
| type UpdateUndoHook struct { | ||
| basicUndoBuilder BasicUndoBuilder | ||
| } | ||
|
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| func (u UpdateUndoHook) Type() types.SQLType { | ||
| return types.SQLTypeUpdate | ||
| } | ||
|
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| // Before build image before execute business sql | ||
| func (u UpdateUndoHook) Before(ctx context.Context, execCtx *exec.ExecContext) { | ||
| r, err := u.basicUndoBuilder.buildRecordImage(ctx, execCtx) | ||
| if err != nil { | ||
| log.Fatalf("build before iamge %v", err) | ||
| return | ||
| } | ||
| execCtx.TxCtx.RoundImages.AppendBeofreImages(r) | ||
| } | ||
|
|
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| // Before build image after execute business sql | ||
| func (u UpdateUndoHook) After(ctx context.Context, execCtx *exec.ExecContext) { | ||
| r, err := u.basicUndoBuilder.buildRecordImage(ctx, execCtx) | ||
| if err != nil { | ||
| log.Fatalf("build after iamge %v", err) | ||
| return | ||
| } | ||
| execCtx.TxCtx.RoundImages.AppendAfterImages(r) | ||
| } |
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