diff --git a/weed/shell/command_mq_topic_desc.go b/weed/shell/command_mq_topic_desc.go new file mode 100644 index 000000000..a4bf805f9 --- /dev/null +++ b/weed/shell/command_mq_topic_desc.go @@ -0,0 +1,59 @@ +package shell + +import ( + "context" + "flag" + "fmt" + "github.com/seaweedfs/seaweedfs/weed/pb" + "github.com/seaweedfs/seaweedfs/weed/pb/mq_pb" + "io" +) + +func init() { + Commands = append(Commands, &commandMqTopicDescribe{}) +} + +type commandMqTopicDescribe struct { +} + +func (c *commandMqTopicDescribe) Name() string { + return "mq.topic.describe" +} + +func (c *commandMqTopicDescribe) Help() string { + return `describe a topic` +} + +func (c *commandMqTopicDescribe) Do(args []string, commandEnv *CommandEnv, writer io.Writer) error { + // parse parameters + mqCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError) + namespace := mqCommand.String("namespace", "", "namespace name") + topicName := mqCommand.String("topic", "", "topic name") + if err := mqCommand.Parse(args); err != nil { + return err + } + + // find the broker balancer + brokerBalancer, err := findBrokerBalancer(commandEnv) + if err != nil { + return err + } + fmt.Fprintf(writer, "current balancer: %s\n", brokerBalancer) + + return pb.WithBrokerGrpcClient(false, brokerBalancer, commandEnv.option.GrpcDialOption, func(client mq_pb.SeaweedMessagingClient) error { + resp, err := client.LookupTopicBrokers(context.Background(), &mq_pb.LookupTopicBrokersRequest{ + Topic: &mq_pb.Topic{ + Namespace: *namespace, + Name: *topicName, + }, + IsForPublish: false, + }) + if err != nil { + return err + } + for _, assignment := range resp.BrokerPartitionAssignments { + fmt.Fprintf(writer, " %+v\n", assignment) + } + return nil + }) +}