github.com/matrixorigin/matrixone@v1.2.0/pkg/vm/engine/tae/db/task.go (about)

     1  // Copyright 2021 Matrix Origin
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package db
    16  
    17  import (
    18  	"context"
    19  
    20  	"github.com/matrixorigin/matrixone/pkg/logutil"
    21  	"github.com/matrixorigin/matrixone/pkg/vm/engine/tae/common"
    22  	"github.com/matrixorigin/matrixone/pkg/vm/engine/tae/tasks"
    23  )
    24  
    25  type ScheduledTxnTask struct {
    26  	*tasks.BaseTask
    27  	db      *DB
    28  	factory tasks.TxnTaskFactory
    29  	scopes  []common.ID
    30  }
    31  
    32  func NewScheduledTxnTask(ctx *tasks.Context, db *DB, taskType tasks.TaskType, scopes []common.ID, factory tasks.TxnTaskFactory) (task *ScheduledTxnTask) {
    33  	task = &ScheduledTxnTask{
    34  		db:      db,
    35  		factory: factory,
    36  		scopes:  scopes,
    37  	}
    38  	task.BaseTask = tasks.NewBaseTask(task, taskType, ctx)
    39  	return
    40  }
    41  
    42  func (task *ScheduledTxnTask) Scopes() []common.ID { return task.scopes }
    43  func (task *ScheduledTxnTask) Scope() *common.ID {
    44  	if task.scopes == nil || len(task.scopes) == 0 {
    45  		return nil
    46  	}
    47  	return &task.scopes[0]
    48  }
    49  
    50  func (task *ScheduledTxnTask) Execute(ctx context.Context) (err error) {
    51  	txn, err := task.db.TxnMgr.StartTxn(nil)
    52  	if err != nil {
    53  		return
    54  	}
    55  	txnTask, err := task.factory(nil, txn)
    56  	if err != nil {
    57  		err2 := txn.Rollback(ctx)
    58  		if err2 != nil {
    59  			panic(err2)
    60  		}
    61  		logutil.Warnf("Execute ScheduleTxnTask: %v. Rollbacked", err)
    62  		return
    63  	}
    64  	err = txnTask.OnExec(task.db.Opts.Ctx)
    65  	if err != nil {
    66  		logutil.Warnf("Task[%d] exec error: %v", task.ID(), err)
    67  		err2 := txn.Rollback(ctx)
    68  		if err2 != nil {
    69  			panic(err)
    70  		}
    71  	} else {
    72  		err = txn.Commit(ctx)
    73  		if err != nil {
    74  			return
    75  		}
    76  		err = txn.GetError()
    77  	}
    78  	return
    79  }