/
describe.go
142 lines (115 loc) · 4.1 KB
/
describe.go
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package describe
import (
"context"
"encoding/json"
"errors"
"github.com/aerogear/charmil-host-example/pkg/cmdutil"
"github.com/aerogear/charmil-host-example/pkg/connection"
"github.com/aerogear/charmil/core/utils/localize"
"github.com/aerogear/charmil-host-example/pkg/cmd/flag"
"github.com/aerogear/charmil-host-example/pkg/dump"
"github.com/aerogear/charmil/core/utils/iostreams"
"gopkg.in/yaml.v2"
"github.com/aerogear/charmil-host-example/pkg/cmd/factory"
"github.com/aerogear/charmil-host-example/pkg/config"
flagutil "github.com/aerogear/charmil-host-example/pkg/cmdutil/flags"
"github.com/spf13/cobra"
"github.com/aerogear/charmil/core/utils/logging"
)
type Options struct {
topicName string
kafkaID string
outputFormat string
IO *iostreams.IOStreams
CfgHandler *config.CfgHandler
Connection factory.ConnectionFunc
Logger func() (logging.Logger, error)
localizer localize.Localizer
}
// NewDescribeTopicCommand gets a new command for describing a kafka topic.
func NewDescribeTopicCommand(f *factory.Factory) *cobra.Command {
opts := &Options{
Connection: f.Connection,
CfgHandler: f.CfgHandler,
Logger: f.Logger,
IO: f.IOStreams,
localizer: f.Localizer,
}
cmd := &cobra.Command{
Use: opts.localizer.LocalizeByID("kafka.topic.describe.cmd.use"),
Short: opts.localizer.LocalizeByID("kafka.topic.describe.cmd.shortDescription"),
Long: opts.localizer.LocalizeByID("kafka.topic.describe.cmd.longDescription"),
Example: opts.localizer.LocalizeByID("kafka.topic.describe.cmd.example"),
Args: cobra.ExactValidArgs(1),
// dynamic completion of topic names
ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
return cmdutil.FilterValidTopicNameArgs(f, toComplete)
},
RunE: func(cmd *cobra.Command, args []string) (err error) {
if len(args) > 0 {
opts.topicName = args[0]
}
if opts.outputFormat != "" {
if err = flag.ValidateOutput(opts.outputFormat); err != nil {
return err
}
}
if opts.kafkaID != "" {
return runCmd(opts)
}
if !f.CfgHandler.Cfg.HasKafka() {
return errors.New(opts.localizer.LocalizeByID("kafka.topic.common.error.noKafkaSelected"))
}
opts.kafkaID = opts.CfgHandler.Cfg.Services.Kafka.ClusterID
return runCmd(opts)
},
}
cmd.Flags().StringVarP(&opts.outputFormat, "output", "o", "json", opts.localizer.LocalizeByID("kafka.topic.common.flag.output.description"))
flagutil.EnableOutputFlagCompletion(cmd)
return cmd
}
func runCmd(opts *Options) error {
conn, err := opts.Connection(connection.DefaultConfigRequireMasAuth)
if err != nil {
return err
}
api, kafkaInstance, err := conn.API().KafkaAdmin(opts.kafkaID)
if err != nil {
return err
}
// fetch the topic
topicResponse, httpRes, err := api.TopicsApi.
GetTopic(context.Background(), opts.topicName).
Execute()
if err != nil {
if httpRes == nil {
return err
}
topicNameTmplPair := localize.NewEntry("TopicName", opts.topicName)
kafkaNameTmplPair := localize.NewEntry("InstanceName", kafkaInstance.GetName())
operationTmplPair := localize.NewEntry("Operation", "delete")
switch httpRes.StatusCode {
case 404:
return errors.New(opts.localizer.LocalizeByID("kafka.topic.common.error.notFoundError", topicNameTmplPair, kafkaNameTmplPair))
case 401:
return errors.New(opts.localizer.LocalizeByID("kafka.topic.common.error.unauthorized", operationTmplPair))
case 403:
return errors.New(opts.localizer.LocalizeByID("kafka.topic.common.error.forbidden", operationTmplPair))
case 500:
return errors.New(opts.localizer.LocalizeByID("kafka.topic.common.error.internalServerError"))
case 503:
return errors.New(opts.localizer.LocalizeByID("kafka.topic.common.error.unableToConnectToKafka", localize.NewEntry("Name", kafkaInstance.GetName())))
default:
return err
}
}
switch opts.outputFormat {
case dump.JSONFormat:
data, _ := json.Marshal(topicResponse)
_ = dump.JSON(opts.IO.Out, data)
case dump.YAMLFormat, dump.YMLFormat:
data, _ := yaml.Marshal(topicResponse)
_ = dump.YAML(opts.IO.Out, data)
}
return nil
}