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, }, }) if err != nil { return err } for _, assignment := range resp.BrokerPartitionAssignments { fmt.Fprintf(writer, " %+v\n", assignment) } return nil }) }