52 lines
1.6 KiB
Go
52 lines
1.6 KiB
Go
// Copyright 2023 PingCAP, Inc.
|
|
//
|
|
// Licensed 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 execute
|
|
|
|
import (
|
|
"context"
|
|
|
|
"github.com/pingcap/tidb/pkg/disttask/framework/proto"
|
|
)
|
|
|
|
// StepExecutor defines the executor for subtasks of a task step.
|
|
// the calling sequence is:
|
|
//
|
|
// Init
|
|
// for every subtask of this step:
|
|
// if RunSubtask failed then break
|
|
// else OnFinished
|
|
// Cleanup
|
|
type StepExecutor interface {
|
|
// Init is used to initialize the environment.
|
|
// if failed, task executor will retry later.
|
|
Init(context.Context) error
|
|
// RunSubtask is used to run the subtask.
|
|
RunSubtask(ctx context.Context, subtask *proto.Subtask) error
|
|
|
|
// RealtimeSummary returns the realtime summary of the running subtask by this executor.
|
|
RealtimeSummary() *SubtaskSummary
|
|
|
|
// OnFinished is used to handle the subtask when it is finished.
|
|
// The subtask meta can be updated in place.
|
|
OnFinished(ctx context.Context, subtask *proto.Subtask) error
|
|
// Cleanup is used to clean up the environment.
|
|
Cleanup(context.Context) error
|
|
}
|
|
|
|
// SubtaskSummary contains the summary of a subtask.
|
|
type SubtaskSummary struct {
|
|
RowCount int64
|
|
}
|