github.com/mhilton/juju-juju@v0.0.0-20150901100907-a94dd2c73455/cmd/juju/service/get.go (about) 1 // Copyright 2012-2015 Canonical Ltd. 2 // Licensed under the AGPLv3, see LICENCE file for details. 3 4 package service 5 6 import ( 7 "errors" 8 9 "github.com/juju/cmd" 10 "launchpad.net/gnuflag" 11 12 "github.com/juju/juju/apiserver/params" 13 "github.com/juju/juju/cmd/envcmd" 14 ) 15 16 // GetCommand retrieves the configuration of a service. 17 type GetCommand struct { 18 envcmd.EnvCommandBase 19 ServiceName string 20 out cmd.Output 21 api GetServiceAPI 22 } 23 24 const getDoc = ` 25 The command output includes the service and charm names, a detailed list of all config 26 settings for <service>, including the setting name, whether it uses the default value 27 or not ("default: true"), description (if set), type, and current value. Example: 28 29 $ juju service get wordpress 30 31 charm: wordpress 32 service: wordpress 33 settings: 34 engine: 35 default: true 36 description: 'Currently two ...' 37 type: string 38 value: nginx 39 tuning: 40 description: "This is the tuning level..." 41 type: string 42 value: optimized 43 44 NOTE: In the example above the descriptions and most other settings were omitted for 45 brevity. The "engine" setting was left at its default value ("nginx"), while the 46 "tuning" setting was set to "optimized" (the default value is "single"). 47 ` 48 49 func (c *GetCommand) Info() *cmd.Info { 50 return &cmd.Info{ 51 Name: "get", 52 Args: "<service>", 53 Purpose: "get service configuration options", 54 Doc: getDoc, 55 } 56 } 57 58 func (c *GetCommand) SetFlags(f *gnuflag.FlagSet) { 59 // TODO(dfc) add json formatting ? 60 c.out.AddFlags(f, "yaml", map[string]cmd.Formatter{ 61 "yaml": cmd.FormatYaml, 62 }) 63 } 64 65 func (c *GetCommand) Init(args []string) error { 66 // TODO(dfc) add --schema-only 67 if len(args) == 0 { 68 return errors.New("no service name specified") 69 } 70 c.ServiceName = args[0] 71 return cmd.CheckEmpty(args[1:]) 72 } 73 74 // GetServiceAPI defines the methods on the client API 75 // that the service get command calls. 76 type GetServiceAPI interface { 77 Close() error 78 ServiceGet(service string) (*params.ServiceGetResults, error) 79 } 80 81 func (c *GetCommand) getAPI() (GetServiceAPI, error) { 82 if c.api != nil { 83 return c.api, nil 84 } 85 return c.NewAPIClient() 86 } 87 88 // Run fetches the configuration of the service and formats 89 // the result as a YAML string. 90 func (c *GetCommand) Run(ctx *cmd.Context) error { 91 client, err := c.getAPI() 92 if err != nil { 93 return err 94 } 95 defer client.Close() 96 97 results, err := client.ServiceGet(c.ServiceName) 98 if err != nil { 99 return err 100 } 101 102 resultsMap := map[string]interface{}{ 103 "service": results.Service, 104 "charm": results.Charm, 105 "settings": results.Config, 106 } 107 return c.out.Write(ctx, resultsMap) 108 }