github.com/pingcap/tiflow@v0.0.0-20240520035814-5bf52d54e205/dm/ctl/master/list_member.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  	"context"
    18  	"errors"
    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  var listMemberFlags = ListMemberFlags{}
    27  
    28  // ListMemberFlags are flags that used in ListMember command.
    29  type ListMemberFlags struct {
    30  	names []string // specify names to list information
    31  }
    32  
    33  // NewListMemberCmd creates an ListMember command.
    34  func NewListMemberCmd() *cobra.Command {
    35  	cmd := &cobra.Command{
    36  		Use:   "list-member [--leader] [--master] [--worker] [--name master-name/worker-name ...]",
    37  		Short: "Lists member information",
    38  		RunE:  listMemberFunc,
    39  	}
    40  	cmd.Flags().BoolP("leader", "l", false, "only to list leader information")
    41  	cmd.Flags().BoolP("master", "m", false, "only to list master information")
    42  	cmd.Flags().BoolP("worker", "w", false, "only to list worker information")
    43  	cmd.Flags().StringSliceVarP(&listMemberFlags.names, "name", "n", []string{}, "specify member names in choosing type")
    44  	return cmd
    45  }
    46  
    47  func convertListMemberType(cmd *cobra.Command) (bool, bool, bool, error) {
    48  	leader, err := cmd.Flags().GetBool("leader")
    49  	if err != nil {
    50  		return false, false, false, err
    51  	}
    52  	master, err := cmd.Flags().GetBool("master")
    53  	if err != nil {
    54  		return false, false, false, err
    55  	}
    56  	worker, err := cmd.Flags().GetBool("worker")
    57  	if err != nil {
    58  		return false, false, false, err
    59  	}
    60  	return leader, master, worker, nil
    61  }
    62  
    63  // listMemberFunc does list member request.
    64  func listMemberFunc(cmd *cobra.Command, _ []string) error {
    65  	if len(cmd.Flags().Args()) != 0 {
    66  		cmd.SetOut(os.Stdout)
    67  		common.PrintCmdUsage(cmd)
    68  		return errors.New("please check output to see error")
    69  	}
    70  
    71  	leader, master, worker, err := convertListMemberType(cmd)
    72  	if err != nil {
    73  		common.PrintLinesf("%v", err)
    74  	}
    75  
    76  	ctx, cancel := context.WithCancel(context.Background())
    77  	defer cancel()
    78  
    79  	resp := &pb.ListMemberResponse{}
    80  	err = common.SendRequest(ctx,
    81  		"ListMember",
    82  		&pb.ListMemberRequest{
    83  			Leader: leader,
    84  			Master: master,
    85  			Worker: worker,
    86  			Names:  listMemberFlags.names,
    87  		},
    88  		&resp,
    89  	)
    90  
    91  	if err != nil {
    92  		return err
    93  	}
    94  	common.PrettyPrintResponse(resp)
    95  	return nil
    96  }