github.com/campoy/docker@v1.8.0-rc1/api/client/top.go (about)

     1  package client
     2  
     3  import (
     4  	"encoding/json"
     5  	"fmt"
     6  	"net/url"
     7  	"strings"
     8  	"text/tabwriter"
     9  
    10  	"github.com/docker/docker/api/types"
    11  	Cli "github.com/docker/docker/cli"
    12  	flag "github.com/docker/docker/pkg/mflag"
    13  )
    14  
    15  // CmdTop displays the running processes of a container.
    16  //
    17  // Usage: docker top CONTAINER
    18  func (cli *DockerCli) CmdTop(args ...string) error {
    19  	cmd := Cli.Subcmd("top", []string{"CONTAINER [ps OPTIONS]"}, "Display the running processes of a container", true)
    20  	cmd.Require(flag.Min, 1)
    21  
    22  	cmd.ParseFlags(args, true)
    23  
    24  	val := url.Values{}
    25  	if cmd.NArg() > 1 {
    26  		val.Set("ps_args", strings.Join(cmd.Args()[1:], " "))
    27  	}
    28  
    29  	serverResp, err := cli.call("GET", "/containers/"+cmd.Arg(0)+"/top?"+val.Encode(), nil, nil)
    30  	if err != nil {
    31  		return err
    32  	}
    33  
    34  	defer serverResp.body.Close()
    35  
    36  	procList := types.ContainerProcessList{}
    37  	if err := json.NewDecoder(serverResp.body).Decode(&procList); err != nil {
    38  		return err
    39  	}
    40  
    41  	w := tabwriter.NewWriter(cli.out, 20, 1, 3, ' ', 0)
    42  	fmt.Fprintln(w, strings.Join(procList.Titles, "\t"))
    43  
    44  	for _, proc := range procList.Processes {
    45  		fmt.Fprintln(w, strings.Join(proc, "\t"))
    46  	}
    47  	w.Flush()
    48  	return nil
    49  }