Golang Context.Set方法代码示例

func parseOthersFlagsForRunContext(ctx *cli.Context, ctxRun *action.Context) error {
	if ctx.IsSet("format") {
		format := ctx.String("format")
		subformat := ""
		//TODO: refactor it!
		if strings.Contains(format, "raw:") {
			subformat = format[len("raw:"):]
			format = "raw"
		}
		if strings.Contains(format, "table:") {
			subformat = format[len("table:"):]
			format = "table"
		}
		if strings.Contains(format, "json:") {
			subformat = format[len("json:"):]
			format = "json"
		}
		if strings.Contains(format, "xml:") {
			subformat = format[len("xml:"):]
			format = "xml"
		}

		switch format {
		case "table", "raw", "json", "xml":
			ctxRun.Set("format", format)
			ctxRun.Set("subformat", subformat)
			break
		default:
			return fmt.Errorf("Unknown format:%s", format)
		}
	} else {
		ctxRun.Set("format", "raw")
	}

	if ctx.IsSet("timeout") {
		ctxRun.Set("timeout", ctx.Int("timeout"))
	}
	if ctx.IsSet("commit") {
		ctxRun.Set("commit", ctx.Bool("commit"))
	}
	return nil
}

//SelectBefore trigger before for select action
func SelectBefore(dbs []db.Database, ctx *action.Context) error {
	// Prepare data in ctx.datasets
	logger.Trace.Println("SelectBefore")
	format := ctx.Get("format")
	subformat := ctx.GetDef("subformat", "").(string)

	datasets := dataset.NewColllection()
	chanHdr := make(chanHeader)
	chandata := make(chanData)
	chanDone := make(chan bool)

	ctx.Set("chanheader", chanHdr)
	ctx.Set("chandata", chandata)
	ctx.Set("chandone", chanDone)
	ctx.Set("datasets", datasets)

	line := 0
	go func() {
		for {
			select {
			case hdr := <-chanHdr:
				ds := datasets.GetOrCreateDataset(hdr.Code)
				ds.AddColumns(hdr.Columns...)
			case cudata := <-chandata:
				line++
				ds := datasets.GetOrCreateDataset(cudata.Code)
				ds.Append(cudata.Data)
				if format == "raw" {
					fmt.Println(formatRaw(subformat, ds.RowsCount(), line, ds.GetColumnsNames(), cudata.Data))
				}
			case <-chanDone:
				logger.Trace.Println("SelectBefore do done")
				return
			}
		}
	}()

	return nil
}

//Run concrete action for all databases
func Run(dbs []db.Database, sql *sqlcommand.SQLCommand, act action.Actioner, ctx *action.Context, pget parametergetter.ParameterGetter) (*action.Context, error) {
	logger.Trace.Println("rdb run")
	defer logger.Trace.Println("rdb run done")
	ctx.Set("params", pget)
	ctx.Set("silent", pget.GetDef(parametergetter.Silent, false).(bool))
	ctx.Snap.Start()

	colParams, err := parameters.GetInstance().All()
	if err != nil {
		return nil, err
	}
	ctx.Set("Params", colParams.Get())

	for _, d := range dbs {
		err := runItem(d, sql, act, ctx, pget)
		if err != nil {
			logger.Error.Println(err)
			//todo: в общий список ошибок
		}
	}
	wg.Wait()
	ctx.Snap.Done(nil)
	return ctx, nil
}

func runItem(d db.Database, s *sqlcommand.SQLCommand, doaction action.Actioner, ctx *action.Context, pget parametergetter.ParameterGetter) error {
	logger.Trace.Println("runItem")
	defer logger.Trace.Println(d.Code, "runItem done")
	if s != nil {
		logger.Trace.Println(d.Code, s.Script)
	}
	wg.Add(1)
	ctx.IncInt("exec", 1)
	params := ctx.Get("Params").([]parameters.Parameter)

	go func() {

		timeout := ctx.GetDef("timeout", 0).(int)
		defer wg.Done()

		var (
			ctxExec context.Context
			cancel  context.CancelFunc
		)
		ch := make(chan bool)
		if timeout > 0 {
			ctxExec, cancel = context.WithTimeout(context.Background(), time.Duration(timeout)*time.Second)
		} else {
			ctxExec, cancel = context.WithCancel(context.Background())
		}

		defer cancel()
		localCtx := action.NewContext()

		go func() {

			defer func() {
				ch <- true
				close(ch)
			}()

			ctx.Set("context"+d.Code, localCtx)
			ctx.Set("iscancel", ch)
			localCtx.Snap.Start()
			localCtx.Set("success", false)

			connectionString, e := paramsreplace.Replace(d.ConnectionString, params)
			if e != nil {
				ctx.IncInt("failed", 1)
				logger.Error.Println(e)

				return
			}
			logger.Debug.Println(d.Code, "Connection string:", connectionString)
			connection, err := rdb.Open(d.Engine, connectionString)
			if err != nil {
				ctx.IncInt("failed", 1)
				logger.Error.Println(d.Code, err)
				return
			}
			defer func() {
				if err := connection.Close(); err != nil {
					panic(err)
				} else {
					logger.Trace.Printf("%s disconnected", d.Code)
				}
			}()

			err = doaction(d, connection, s, ctx)
			if err != nil {
				if err.Error() != "cancel" {
					ctx.IncInt("failed", 1)
					localCtx.Snap.Done(err)
					logger.Error.Println(d.Code, err)
					if !ctx.GetDef("silent", false).(bool) {
						fmt.Fprintf(os.Stdout, "%s: %s\n", d.Code, strings.Replace(err.Error(), "\n", " ", -1))
					}
				}

				return
			}

			localCtx.Set("success", true)
			ctx.IncInt("success", 1)
			localCtx.Snap.Done(nil)
			runtime.Gosched()
		}()

		select {
		case <-ch:
			logger.Trace.Println("operation done w/o timeout")
			return
		case <-ctxExec.Done():
			err := ctxExec.Err()
			logger.Trace.Printf("operation done: %s\n", err)

			ctx.IncInt("failed", 1)
			localCtx.Snap.Done(err)
			logger.Error.Println(d.Code, err)

			//	ch <- true

			return
		}

//.........这里部分代码省略.........

func doOutputTable(dbs []db.Database, ctx *action.Context) error {
	datasets := ctx.Get("datasets").(*dataset.CollectionDataset)
	table := fmttab.New("", fmttab.BorderThin, nil)
	table.AddColumn("_CODE_", 10, fmttab.AlignLeft)
	ctx.Set("table", table)

	for _, col := range datasets.GetUniqueColumnsNames() {
		table.AddColumn(col, 15, fmttab.AlignLeft)
	}
	for _, ds := range datasets.GetDatasets() {
		for _, row := range ds.Rows {
			table.AppendData(row.GetDataMap())
		}
	}

	pget := ctx.Get("params").(parametergetter.ParameterGetter)

	if pget.GetDef(parametergetter.AutoFitWidthColumns, true).(bool) {
		//todo: move into fmttab
		cols := table.Columns.ColumnsVisible()
		for c, col := range cols {
			max := utf8.RuneCountInString(col.Name)
			for i := 0; i < len(table.Data); i++ {
				val, ok := table.Data[i][col.Name]

				if ok && val != nil {
					fval := fmt.Sprintf("%v", val)
					l := utf8.RuneCountInString(fval)
					if l > max {
						max = l
					}
				}
			}
			if max != 0 {
				cols[c].Width = max
			}
		}
	}

	switch pget.GetDef(parametergetter.BorderTable, "").(string) {
	case "Thin":
		table.SetBorder(fmttab.BorderThin)
	case "Double":
		table.SetBorder(fmttab.BorderDouble)
	case "None":
		table.SetBorder(fmttab.BorderNone)
	case "Simple":
		table.SetBorder(fmttab.BorderSimple)
	}

	tabex.SetTableSubFormat(table, ctx.GetDef("subformat", "").(string))

	if pget.GetDef(parametergetter.Fit, true).(bool) {

		if e := termbox.Init(); e != nil {
			return e
		}
		tw, _ := termbox.Size()
		table.AutoSize(true, tw)
		termbox.Close()
	}

	if _, err := table.WriteTo(os.Stdout); err != nil {
		return err
	}
	return nil
}