Struct ListOffsetsService 

pub struct ListOffsetsService;

A Service using Storage as Context taking ListOffsetsRequest returning ListOffsetsResponse.

use rama::{Context, Layer as _, Service, layer::MapStateLayer};
use tansu_sans_io::{
    ErrorCode, IsolationLevel, ListOffset, ListOffsetsRequest,
    list_offsets_request::{ListOffsetsPartition, ListOffsetsTopic},
};
use tansu_storage::{Error, ListOffsetsService, StorageContainer};
use url::Url;

const HOST: &str = "localhost";
const PORT: i32 = 9092;
const NODE_ID: i32 = 111;

let storage = StorageContainer::builder()
    .cluster_id("tansu")
    .node_id(NODE_ID)
    .advertised_listener(Url::parse(&format!("tcp://{HOST}:{PORT}"))?)
    .storage(Url::parse("memory://tansu/")?)
    .build()
    .await?;

let service = MapStateLayer::new(|_| storage).into_layer(ListOffsetsService);

let topic = "abcba";

let response = service
    .serve(
        Context::default(),
        ListOffsetsRequest::default()
            .isolation_level(Some(IsolationLevel::ReadUncommitted.into()))
            .replica_id(NODE_ID)
            .topics(Some(
                [ListOffsetsTopic::default()
                    .name(topic.into())
                    .partitions(Some(
                        [ListOffsetsPartition::default()
                            .current_leader_epoch(Some(-1))
                            .max_num_offsets(Some(3))
                            .partition_index(0)
                            .timestamp(ListOffset::Earliest.try_into()?)]
                        .into(),
                    ))]
                .into(),
            )),
    )
    .await?;

let topics = response.topics.as_deref().unwrap_or_default();
assert_eq!(1, topics.len());
assert_eq!(topic, topics[0].name);

let partitions = topics[0].partitions.as_deref().unwrap_or_default();
assert_eq!(1, partitions.len());
assert_eq!(0, partitions[0].partition_index);
assert!(partitions[0].old_style_offsets.is_none());
assert_eq!(
    ErrorCode::None,
    ErrorCode::try_from(partitions[0].error_code)?
);
assert_eq!(Some(-1), partitions[0].timestamp);
assert_eq!(Some(0), partitions[0].offset);
assert_eq!(Some(0), partitions[0].leader_epoch);

Trait Implementations

impl ApiKey for ListOffsetsService

const KEY: i16 = ListOffsetsRequest::KEY

impl Clone for ListOffsetsService

fn clone(&self) -> ListOffsetsService

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ListOffsetsService

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for ListOffsetsService

fn default() -> ListOffsetsService

Returns the “default value” for a type.

impl Hash for ListOffsetsService

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for ListOffsetsService

fn cmp(&self, other: &ListOffsetsService) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for ListOffsetsService

fn eq(&self, other: &ListOffsetsService) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for ListOffsetsService

fn partial_cmp(&self, other: &ListOffsetsService) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl<G> Service<G, ListOffsetsRequest> for ListOffsetsService

where G: Storage,

type Response = ListOffsetsResponse

The type of response returned by the service.

type Error = Error

The type of error returned by the service.

async fn serve( &self, ctx: Context<G>, req: ListOffsetsRequest, ) -> Result<Self::Response, Self::Error>

Serve a response or error for the given request, using the given context.

fn boxed(self) -> BoxService<S, Request, Self::Response, Self::Error>

Box this service to allow for dynamic dispatch.

impl Copy for ListOffsetsService

impl Eq for ListOffsetsService

impl StructuralPartialEq for ListOffsetsService