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* Consumer group topic assignments * Fixed offset lag caclulation logic
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,128 @@ | ||
| package commands | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "context" | ||
| "fmt" | ||
| "os" | ||
| "regexp" | ||
| "strconv" | ||
|
|
||
| "github.com/dustin/go-humanize" | ||
| "github.com/olekukonko/tablewriter" | ||
| "gopkg.in/alecthomas/kingpin.v2" | ||
|
|
||
| "github.com/xitonix/trubka/kafka" | ||
| ) | ||
|
|
||
| type listGroupTopics struct { | ||
| globalParams *GlobalParameters | ||
| kafkaParams *kafkaParameters | ||
| includeOffsets bool | ||
| topicFilter *regexp.Regexp | ||
| group string | ||
| format string | ||
| } | ||
|
|
||
| func addListGroupTopicsSubCommand(parent *kingpin.CmdClause, global *GlobalParameters, kafkaParams *kafkaParameters) { | ||
| cmd := &listGroupTopics{ | ||
| globalParams: global, | ||
| kafkaParams: kafkaParams, | ||
| } | ||
| c := parent.Command("topics", "Lists the topics a consumer group is subscribed to.").Action(cmd.run) | ||
| c.Arg("group", "The consumer group ID to fetch the topics for."). | ||
| Required(). | ||
| StringVar(&cmd.group) | ||
|
|
||
| c.Flag("topic-filter", "An optional regular expression to filter the topics by."). | ||
| Short('t'). | ||
| RegexpVar(&cmd.topicFilter) | ||
|
|
||
| c.Flag("offsets", "Enables fetching the offsets for the topics."). | ||
| Short('o'). | ||
| BoolVar(&cmd.includeOffsets) | ||
|
|
||
| addFormatFlag(c, &cmd.format) | ||
| } | ||
|
|
||
| func (c *listGroupTopics) run(_ *kingpin.ParseContext) error { | ||
| manager, ctx, cancel, err := initKafkaManager(c.globalParams, c.kafkaParams) | ||
|
|
||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| defer func() { | ||
| manager.Close() | ||
| cancel() | ||
| }() | ||
|
|
||
| return c.listTopics(ctx, manager) | ||
| } | ||
|
|
||
| func (c *listGroupTopics) listTopics(ctx context.Context, manager *kafka.Manager) error { | ||
| topics, err := manager.GetGroupTopics(ctx, c.group, c.includeOffsets, c.topicFilter) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| if len(topics) == 0 { | ||
| fmt.Println(getNotFoundMessage("topic", "topic", c.topicFilter)) | ||
| return nil | ||
| } | ||
|
|
||
| switch c.format { | ||
| case plainTextFormat: | ||
| c.printPlainTextOutput(topics) | ||
| case tableFormat: | ||
| c.printTableOutput(topics) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func (c *listGroupTopics) printTableOutput(topics kafka.TopicPartitionOffset) { | ||
| for topic, partitionOffsets := range topics { | ||
| parentTable := tablewriter.NewWriter(os.Stdout) | ||
| parentTable.SetAutoWrapText(false) | ||
| parentTable.SetAutoFormatHeaders(false) | ||
| parentTable.SetHeader([]string{"Topic: " + topic}) | ||
| parentTable.SetColMinWidth(0, 80) | ||
| if c.includeOffsets && len(partitionOffsets) > 0 { | ||
| buff := bytes.Buffer{} | ||
| table := tablewriter.NewWriter(&buff) | ||
| table.SetHeader([]string{"Partition", "Latest", "Current", "Lag"}) | ||
| table.SetColMinWidth(0, 20) | ||
| table.SetColMinWidth(1, 20) | ||
| table.SetColMinWidth(2, 20) | ||
| table.SetColMinWidth(3, 20) | ||
| table.SetAlignment(tablewriter.ALIGN_CENTER) | ||
| partitions := partitionOffsets.SortPartitions() | ||
| for _, partition := range partitions { | ||
| offsets := partitionOffsets[int32(partition)] | ||
| latest := humanize.Comma(offsets.Latest) | ||
| current := humanize.Comma(offsets.Current) | ||
| part := strconv.FormatInt(int64(partition), 10) | ||
| table.Append([]string{part, latest, current, highlightLag(offsets.Lag())}) | ||
| } | ||
| table.Render() | ||
| parentTable.Append([]string{buff.String()}) | ||
| } | ||
| parentTable.SetHeaderLine(false) | ||
| parentTable.Render() | ||
| } | ||
| } | ||
|
|
||
| func (c *listGroupTopics) printPlainTextOutput(topics kafka.TopicPartitionOffset) { | ||
| for topic, partitionOffsets := range topics { | ||
| fmt.Printf("%s\n", bold(topic)) | ||
| if c.includeOffsets && len(partitionOffsets) > 0 { | ||
| fmt.Printf("\n\n") | ||
| partitions := partitionOffsets.SortPartitions() | ||
| for _, partition := range partitions { | ||
| offsets := partitionOffsets[int32(partition)] | ||
| fmt.Printf(" Partition %2d: %d out of %d (Lag: %s) \n", partition, offsets.Current, offsets.Latest, highlightLag(offsets.Lag())) | ||
| } | ||
| fmt.Println() | ||
| } | ||
| } | ||
| } |
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