github.com/pingcap/tiflow@v0.0.0-20240520035814-5bf52d54e205/dm/ctl/master/pause_relay.go (about)

     1  // Copyright 2019 PingCAP, Inc.
     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  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  package master
    15  
    16  import (
    17  	"errors"
    18  	"fmt"
    19  	"os"
    20  
    21  	"github.com/pingcap/tiflow/dm/ctl/common"
    22  	"github.com/pingcap/tiflow/dm/pb"
    23  	"github.com/spf13/cobra"
    24  )
    25  
    26  // NewPauseRelayCmd creates a PauseRelay command.
    27  func NewPauseRelayCmd() *cobra.Command {
    28  	cmd := &cobra.Command{
    29  		Use:   "pause-relay <-s source ...>",
    30  		Short: "Pauses DM-worker's relay unit",
    31  		RunE:  pauseRelayFunc,
    32  	}
    33  	return cmd
    34  }
    35  
    36  // pauseRelayFunc does pause relay request.
    37  func pauseRelayFunc(cmd *cobra.Command, _ []string) (err error) {
    38  	if len(cmd.Flags().Args()) > 0 {
    39  		cmd.SetOut(os.Stdout)
    40  		common.PrintCmdUsage(cmd)
    41  		err = errors.New("please check output to see error")
    42  		return
    43  	}
    44  
    45  	sources, err := common.GetSourceArgs(cmd)
    46  	if err != nil {
    47  		return
    48  	}
    49  	if len(sources) == 0 {
    50  		fmt.Println("must specify at least one source (`-s` / `--source`)")
    51  		err = errors.New("please check output to see error")
    52  		return
    53  	}
    54  
    55  	resp, err := common.OperateRelay(pb.RelayOp_PauseRelay, sources)
    56  	if err != nil {
    57  		return
    58  	}
    59  
    60  	common.PrettyPrintResponse(resp)
    61  	return
    62  }