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example_sql_container.go
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example_sql_container.go
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package videocut
import (
"context"
"errors"
"fmt"
"log"
"os"
"time"
framework "github.com/memory-overflow/light-task-scheduler"
"gorm.io/driver/mysql"
"gorm.io/gorm"
"gorm.io/gorm/clause"
gormlogger "gorm.io/gorm/logger"
)
// videoCutSqlContainer sql db 作为容器,可以根据本实现调整自己的数据表
type videoCutSqlContainer struct {
db *gorm.DB // 数据库连接
}
// MakeVideoCutSqlContainer 构造数据库容器
func MakeVideoCutSqlContainer(dbHost, dbPort, dbUser, dbPass, dbName string) (
sqlContainer *videoCutSqlContainer, err error) {
// 获取 gorm 数据库连接实例
connStr := fmt.Sprintf("%s:%s@tcp(%s:%s)/%s?charset=utf8&parseTime=True&loc=Local&interpolateParams=true",
dbUser, dbPass, dbHost, dbPort, dbName)
newLogger := gormlogger.New(
log.New(os.Stdout, "\r\n", log.LstdFlags), // io writer
gormlogger.Config{
SlowThreshold: 5 * time.Second, // Slow SQL threshold
LogLevel: gormlogger.Warn, // Log level
Colorful: true, // enable color
},
)
db, err := gorm.Open(mysql.Open(connStr), &gorm.Config{
CreateBatchSize: 500,
Logger: newLogger,
})
if err != nil {
return nil, errors.New("Connect db failed, conn str: " + connStr + ", error: " + err.Error())
}
if db == nil {
return nil, errors.New("Connect db failed, conn str: " + connStr + ", unknow error")
}
sql, err := db.DB()
if err != nil {
return nil, errors.New("Connect db failed, conn str: " + connStr + ", unknow error")
}
// 配置 db 限制
sql.SetMaxOpenConns(200)
sql.SetMaxIdleConns(200)
sql.SetConnMaxLifetime(time.Minute)
sql.SetConnMaxIdleTime(time.Minute)
// db = db.Debug()
// 自动 migrate task 表
err = db.Set("gorm:table_options", "ENGINE=InnoDB DEFAULT CHARSET=utf8").AutoMigrate(&VideoCutTask{})
if err != nil {
return nil, errors.New("migrate table failed: " + err.Error())
}
return &videoCutSqlContainer{db: db}, nil
}
// AddTask 添加任务
func (e *videoCutSqlContainer) AddTask(ctx context.Context, ftask framework.Task) (err error) {
task, ok := ftask.TaskItem.(VideoCutTask)
if !ok {
return fmt.Errorf("TaskItem not be set to VideoCutTask")
}
db := e.db
t := time.Now()
task.Status = framework.TASK_STATUS_WAITING
task.StartAt = &t
task.EndAt = nil
if err = db.Clauses(clause.OnConflict{
Columns: []clause.Column{{Name: "task_id"}},
DoUpdates: clause.AssignmentColumns([]string{"status", "start_time", "end_time"}),
}).Create(&task).Error; err != nil {
err = fmt.Errorf("db create error: %v", err)
log.Println(err)
return err
}
return nil
}
// GetRunningTask 获取运行中的任务
func (e *videoCutSqlContainer) GetRunningTask(ctx context.Context) (tasks []framework.Task, err error) {
db := e.db
taskRecords := []VideoCutTask{}
if err = db.Where("status = ?", framework.TASK_STATUS_RUNNING).Find(&taskRecords).Error; err != nil {
err = fmt.Errorf("db find error: %v", err)
log.Panicln(err)
return nil, err
}
for _, taskRecord := range taskRecords {
task := framework.Task{
TaskId: taskRecord.TaskId,
TaskItem: taskRecord,
TaskStatus: taskRecord.Status,
}
if taskRecord.StartAt != nil {
task.TaskStartTime = *taskRecord.StartAt
}
tasks = append(tasks, task)
}
return tasks, nil
}
// GetRunningTaskCount 获取运行中的任务数
func (e *videoCutSqlContainer) GetRunningTaskCount(ctx context.Context) (count int32, err error) {
db := e.db
var tot int64
if err = db.Model(&VideoCutTask{}).Where("status = ?",
framework.TASK_STATUS_RUNNING).Count(&tot).Error; err != nil {
err = fmt.Errorf("db count error: %v", err)
log.Println(err)
return 0, err
}
return int32(tot), nil
}
// GetWaitingTask 获取等待中的任务
func (e *videoCutSqlContainer) GetWaitingTask(ctx context.Context, limit int32) (tasks []framework.Task, err error) {
db := e.db
taskRecords := []VideoCutTask{}
if err = db.Where("status = ?", framework.TASK_STATUS_WAITING).
Order("start_time asc"). // 按照开始时间优先运行
Limit(int(limit)).Find(&taskRecords).Error; err != nil {
err = fmt.Errorf("db create error: %v", err)
log.Println(err)
return nil, err
}
for _, taskRecord := range taskRecords {
task := framework.Task{
TaskId: taskRecord.TaskId,
TaskItem: taskRecord,
TaskStatus: taskRecord.Status,
}
if taskRecord.StartAt != nil {
task.TaskStartTime = *taskRecord.StartAt
}
tasks = append(tasks, task)
}
return tasks, nil
}
// ToRunningStatus 转移到运行中的状态
func (e *videoCutSqlContainer) ToRunningStatus(ctx context.Context, ftask *framework.Task) (
newTask *framework.Task, err error) {
defer func() {
if err != nil {
log.Println("ToRunningStatus: ", err)
}
}()
task, ok := ftask.TaskItem.(VideoCutTask)
if !ok {
return ftask, fmt.Errorf("TaskItem not be set to VideoCutTask")
}
db := e.db
t := time.Now()
sql := db.Model(&VideoCutTask{}).Where("task_id = ? and status = ?", ftask.TaskId, ftask.TaskStatus).
Updates(map[string]interface{}{
"status": framework.TASK_STATUS_RUNNING,
"start_time": t,
"work_task_id": task.WorkTaskId,
"attempts_time": ftask.TaskAttemptsTime,
})
if sql.Error != nil {
return ftask, fmt.Errorf("db update error: %v", sql.Error)
}
if sql.RowsAffected == 0 {
return ftask, fmt.Errorf("task %s not found, may status has been changed", task.TaskId)
}
task.Status, ftask.TaskStatus = framework.TASK_STATUS_RUNNING, framework.TASK_STATUS_RUNNING
task.StartAt, ftask.TaskStartTime = &t, t
ftask.TaskItem = task
return ftask, nil
}
// ToExportStatus 转移到停止状态
func (e *videoCutSqlContainer) ToStopStatus(ctx context.Context, ftask *framework.Task) (
newTask *framework.Task, err error) {
defer func() {
if err != nil {
log.Println("ToStopStatus: ", err)
}
}()
task, ok := ftask.TaskItem.(VideoCutTask)
if !ok {
return ftask, fmt.Errorf("TaskItem not be set to VideoCutTask")
}
db := e.db
sql := db.Model(&VideoCutTask{}).Where("task_id = ? and status = ?", task.TaskId, task.Status).
Update("status", framework.TASK_STATUS_STOPED)
if sql.Error != nil {
return ftask, fmt.Errorf("db update error: %v", sql.Error)
}
fmt.Println(sql.RowsAffected)
if sql.RowsAffected == 0 {
return ftask, fmt.Errorf("task %s not found, may status has been changed", task.TaskId)
}
task.Status, ftask.TaskStatus = framework.TASK_STATUS_STOPED, framework.TASK_STATUS_STOPED
ftask.TaskItem = task
return ftask, nil
}
// ToExportStatus 转移到删除状态
func (e *videoCutSqlContainer) ToDeleteStatus(ctx context.Context, ftask *framework.Task) (
newTask *framework.Task, err error) {
defer func() {
if err != nil {
log.Println("ToDeleteStatus: ", err)
}
}()
task, ok := ftask.TaskItem.(VideoCutTask)
if !ok {
return ftask, fmt.Errorf("TaskItem not be set to VideoCutTask")
}
db := e.db
sql := db.Where("task_id = ? and status = ?", task.TaskId, task.Status).Delete(&VideoCutTask{})
if sql.Error != nil {
return ftask, fmt.Errorf("db delete error: %v", sql.Error)
}
if sql.RowsAffected == 0 {
return ftask, fmt.Errorf("task %s not found, may status has been changed", task.TaskId)
}
task.Status, ftask.TaskStatus = framework.TASK_STATUS_DELETE, framework.TASK_STATUS_DELETE
ftask.TaskItem = task
return ftask, nil
}
// ToFailedStatus 转移到失败状态
func (e *videoCutSqlContainer) ToFailedStatus(ctx context.Context, ftask *framework.Task, reason error) (
newTask *framework.Task, err error) {
defer func() {
if err != nil {
log.Println("ToFailedStatus: ", err)
}
}()
task, ok := ftask.TaskItem.(VideoCutTask)
if !ok {
return ftask, fmt.Errorf("TaskItem not be set to VideoCutTask")
}
db := e.db
t := time.Now()
sql := db.Model(&VideoCutTask{}).Where("task_id = ? and status = ?", ftask.TaskId, ftask.TaskStatus).
Updates(map[string]interface{}{
"status": framework.TASK_STATUS_FAILED,
"end_time": t,
"failed_reason": reason.Error(),
})
if sql.Error != nil {
return ftask, fmt.Errorf("db update error: %v", sql.Error)
}
if sql.RowsAffected == 0 {
return ftask, fmt.Errorf("task %s not found, may status has been changed", task.TaskId)
}
task.Status, ftask.TaskStatus = framework.TASK_STATUS_FAILED, framework.TASK_STATUS_FAILED
task.FailedReason, ftask.FailedReason = reason.Error(), reason.Error()
task.EndAt, ftask.TaskEnbTime = &t, t
ftask.TaskItem = task
return ftask, nil
}
// ToExportStatus 转移到数据导出状态
func (e *videoCutSqlContainer) ToExportStatus(ctx context.Context, ftask *framework.Task) (
newTask *framework.Task, err error) {
defer func() {
if err != nil {
log.Println("ToExportStatus: ", err)
}
}()
task, ok := ftask.TaskItem.(VideoCutTask)
if !ok {
return ftask, fmt.Errorf("TaskItem not be set to VideoCutTask")
}
db := e.db
sql := db.Model(&VideoCutTask{}).Where("task_id = ? and status = ?", ftask.TaskId, ftask.TaskStatus).
Update("status", framework.TASK_STATUS_EXPORTING)
if sql.Error != nil {
return ftask, fmt.Errorf("db update error: %v", sql.Error)
}
if sql.RowsAffected == 0 {
return ftask, fmt.Errorf("task %s not found, may status has been changed", task.TaskId)
}
task.Status, ftask.TaskStatus = framework.TASK_STATUS_EXPORTING, framework.TASK_STATUS_EXPORTING
ftask.TaskItem = task
return ftask, nil
}
// ToSuccessStatus 转移到执行成功状态
func (e *videoCutSqlContainer) ToSuccessStatus(ctx context.Context, ftask *framework.Task) (
newTask *framework.Task, err error) {
defer func() {
if err != nil {
log.Println("ToSuccessStatus: ", err)
}
}()
task, ok := ftask.TaskItem.(VideoCutTask)
if !ok {
return ftask, fmt.Errorf("TaskItem not be set to VideoCutTask")
}
db := e.db
t := time.Now()
sql := db.Model(&VideoCutTask{}).Where("task_id = ? and status = ?", ftask.TaskId, ftask.TaskStatus).
Updates(map[string]interface{}{
"status": framework.TASK_STATUS_SUCCESS,
"end_time": t,
})
if sql.Error != nil {
return ftask, fmt.Errorf("db update error: %v", sql.Error)
}
if sql.RowsAffected == 0 {
return ftask, fmt.Errorf("task %s not found, may status has been changed", task.TaskId)
}
task.Status, ftask.TaskStatus = framework.TASK_STATUS_SUCCESS, framework.TASK_STATUS_SUCCESS
task.EndAt, ftask.TaskEnbTime = &t, t
ftask.TaskItem = task
return ftask, nil
}
// UpdateRunningTaskStatus 更新执行中的任务状态
func (e *videoCutSqlContainer) UpdateRunningTaskStatus(ctx context.Context,
ftask *framework.Task, status framework.AsyncTaskStatus) error {
return nil
}
// SaveData 提供一个把从任务执行器获取的任务执行的结果进行存储的机会
// data 协议保持和 TaskActuator.GetOutput 一样, 一个 string 表示结果路径
func (e *videoCutSqlContainer) SaveData(ctx context.Context, ftask *framework.Task,
data interface{}) (err error) {
return nil
}
// 下面的方法用来做其他的业务查询
// GetTaskInfoSet 分页拉取任务列表接口
func (e *videoCutSqlContainer) GetTasks(ctx context.Context, pageNumber, pageSize int) (
tasks []VideoCutTask, count int, err error) {
db := e.db
tempDb := db.Model(VideoCutTask{}).Where("delete_time is null")
orderStr := "create_time DESC"
var total int64
tempDb.Count(&total)
count = int(total)
tempDb = tempDb.Order(orderStr).Offset((pageNumber - 1) * pageSize).Limit(pageSize)
if e := tempDb.Find(&tasks).Error; e != nil {
return nil, 0, e
}
return tasks, count, nil
}
// CreateTask 创建任务
func (e *videoCutSqlContainer) CreateTask(ctx context.Context, task VideoCutTask) (err error) {
db := e.db
if err = db.Model(&task).Create(&task).Error; err != nil {
err = fmt.Errorf("db create error: %v", err)
log.Println(err)
return err
}
return nil
}
// GetTask 根据 taskId 查询任务
func (e *videoCutSqlContainer) GetTask(ctx context.Context, taskId string) (
task *VideoCutTask, err error) {
db := e.db
tempTask := VideoCutTask{}
if err = db.Model(&tempTask).Where("task_id = ?", taskId).First(&tempTask).Error; err != nil {
if err == gorm.ErrRecordNotFound {
return nil, fmt.Errorf("不存在的任务")
} else {
err = fmt.Errorf("db first error: %v", err)
log.Println(err)
}
return nil, err
}
return &tempTask, nil
}
func (e videoCutSqlContainer) DataPersistence(
ctx context.Context, ftask *framework.Task, data interface{}) (err error) {
defer func() {
if err != nil {
log.Println("SaveData:", err)
}
}()
task, ok := ftask.TaskItem.(VideoCutTask)
if !ok {
return fmt.Errorf("TaskItem not be set to VideoCutTask")
}
db := e.db
outputVideo, ok := data.(string)
if !ok {
return fmt.Errorf("data not be set to string")
}
sql := db.Model(&VideoCutTask{}).Where("task_id = ?", ftask.TaskId).
Updates(map[string]interface{}{
"output_video": outputVideo,
})
if sql.Error != nil {
return fmt.Errorf("db update error: %v", sql.Error)
}
if sql.RowsAffected == 0 {
return fmt.Errorf("task %s not found, may status has been changed", task.TaskId)
}
return nil
}
// GetPersistenceData 查询任务持久化结果
func (e videoCutSqlContainer) GetPersistenceData(ctx context.Context, task *framework.Task) (
data interface{}, err error) {
return nil, nil
}
// DeletePersistenceData 删除任务的此久化结果
func (e videoCutSqlContainer) DeletePersistenceData(ctx context.Context, task *framework.Task) (err error) {
return nil
}