/// Parse metadata parameters and generate Topic/Partition parameters
Parse metadata parameters and generate Topic/Partition parameters
Parse metadata parameters and generate Topic / Partition parameters
fn metadata_to_all_topic_partition_params(
    metadata_resp: &KfMetadataResponse,
) -> Result<TopicPartitionParam, CliError> {
    // there must be one topic in reply
    if metadata_resp.topics.len() != 1 {
        return Err(CliError::IoError(IoError::new(
            ErrorKind::InvalidData,
            format!("expected 1 topic, found {}", metadata_resp.topics.len()),
        )));
    }
    // check for errors
    let topic_resp = &metadata_resp.topics[0];
    if topic_resp.error_code != KfErrorCode::None {
        return Err(CliError::IoError(IoError::new(
            ErrorKind::InvalidData,
            format!("metadata response: {}", topic_resp.error_code.to_sentence()),
        )));
    }
    // generate topic/partition parameter object
    let mut tp_param = TopicPartitionParam {
        topic_name: topic_resp.name.clone(),
        leaders: vec![],
    };
    // traverse all partitions and look-up leaders
    for partition_resp in &topic_resp.partitions {
        if partition_resp.error_code != KfErrorCode::None {
            return Err(CliError::IoError(IoError::new(
                ErrorKind::InvalidData,
                format!(
                    "partition '{}/{}': {}",
                    topic_resp.name,
                    partition_resp.partition_index,
                    partition_resp.error_code.to_sentence()
                ),
            )));
        }
        // find leader for this partition
        let mut leader: Option<&mut LeaderParam> = None;
        for leader_param in &mut tp_param.leaders {
            if leader_param.leader_id == partition_resp.leader_id {
                leader = Some(leader_param);
                break;
            }
        }
        // create leader for this partition
        if leader.is_none() {
            // generate leader
            for broker_resp in &metadata_resp.brokers {
                if broker_resp.node_id == partition_resp.leader_id {
                    let server_addr = ProfileConfig::host_port_to_socket_addr(&format!(
                        "{}:{}",
                        broker_resp.host, broker_resp.port
                    ))?;
                    tp_param.leaders.push(LeaderParam {
                        leader_id: broker_resp.node_id,
                        server_addr: server_addr,
                        partitions: vec![],
                    });
                    let len = tp_param.leaders.len();
                    leader = Some(&mut tp_param.leaders[len - 1]);
                    break;
                }
            }
        }
        if let Some(leader) = leader {
            // add partition to leader
            leader.partitions.push(PartitionParam {
                partition_idx: partition_resp.partition_index,
                epoch: partition_resp.leader_epoch,
                offset: -1,
            });
        } else {
            return Err(CliError::IoError(IoError::new(
                ErrorKind::InvalidData,
                "invalid metadata",
            )));
        };
    }
    // there must be at least one topic generated
    if tp_param.leaders.len() == 0 {
        return Err(CliError::IoError(IoError::new(
            ErrorKind::InvalidData,
            "error generating topic/partitions",
        )));
    }
    debug!("topic-partition parameters {:#?}", tp_param);
    Ok(tp_param)
}
fn metadata_to_all_topic_partition_params ( metadata_resp : & KfMetadataResponse , ) -> Result < TopicPartitionParam , CliError > { // there must be one topic in reply if metadata_resp . topics . len ( ) != 1 { return Err ( CliError :: IoError ( IoError :: new ( ErrorKind :: InvalidData , format ! ( " " metadata_resp topics len ( ) ) , ) ) ) ; } // check for errors let topic_resp = & metadata_resp . topics [ 0 ] ; if topic_resp . error_code != KfErrorCode :: None { return Err ( CliError :: IoError ( IoError :: new ( ErrorKind :: InvalidData , format ! ( " " topic_resp error_code to_sentence ( ) ) , ) ) ) ; } // generate topic/partition parameter object let mut tp_param = TopicPartitionParam { topic_name : topic_resp . name . clone ( ) , leaders : vec ! [ ] , } ; // traverse all partitions and look-up leaders for partition_resp in & topic_resp . partitions { if partition_resp . error_code != KfErrorCode :: None { return Err ( CliError :: IoError ( IoError :: new ( ErrorKind :: InvalidData , format ! ( " " topic_resp name partition_resp partition_index partition_resp error_code to_sentence ( ) ) , ) ) ) ; } // find leader for this partition let mut leader : Option < & mut LeaderParam > = None ; for leader_param in & mut tp_param . leaders { if leader_param . leader_id == partition_resp . leader_id { leader = Some ( leader_param ) ; break ; } } // create leader for this partition if leader . is_none ( ) { // generate leader for broker_resp in & metadata_resp . brokers { if broker_resp . node_id == partition_resp . leader_id { let server_addr = ProfileConfig :: host_port_to_socket_addr ( & format ! ( " " broker_resp host broker_resp port ) ) ? ; tp_param . leaders . push ( LeaderParam { leader_id : broker_resp . node_id , server_addr : server_addr , partitions : vec ! [ ] , } ) ; let len = tp_param . leaders . len ( ) ; leader = Some ( & mut tp_param . leaders [ len - 1 ] ) ; break ; } } } if let Some ( leader ) = leader { // add partition to leader leader . partitions . push ( PartitionParam { partition_idx : partition_resp . partition_index , epoch : partition_resp . leader_epoch , offset : - 1 , } ) ; } else { return Err ( CliError :: IoError ( IoError :: new ( ErrorKind :: InvalidData , " " , ) ) ) ; } ; } // there must be at least one topic generated if tp_param . leaders . len ( ) == 0 { return Err ( CliError :: IoError ( IoError :: new ( ErrorKind :: InvalidData , " " , ) ) ) ; } debug ! ( " " tp_param ) ; Ok ( tp_param ) }
Parse metadata parameters and generate Topic/Partition parameters
Parse metadata parameters and generate Topic / Partition parameters
metadata_resp
&KfMetadataResponse