Struct BackendAnnounce 

#[non_exhaustive]
pub struct BackendAnnounce {
    pub versions: OpVersions,
    pub ready: bool,
    pub backends: Vec<BackendDescriptor>,
    pub topology: Option<WireTopology>,
    pub filters: Option<FilterAnnounce>,
}

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

versions: OpVersions

ready: bool

backends: Vec<BackendDescriptor>

Materialization backends the server currently exposes (the ones it has open). A client routes only to an advertised id. Empty (the default) is skipped on encode, so a pre-backends announce stays byte-identical and an older reader simply sees no advertised backends.

topology: Option<WireTopology>

The stream/topic names this deployment uses. Absent (the default) is skipped on encode, so a pre-topology announce stays byte-identical and an older reader sees no advertised topology (falls back to its own WireTopology::default).

filters: Option<FilterAnnounce>

The consumer-filter evaluation the streaming server serves, set with the CONSUMER_FILTERS bit. Absent from an older server, whose client then assumes its own evaluator.

Implementations

impl BackendAnnounce

pub fn new(versions: OpVersions) -> Self

Constructor for the non-exhaustive wire struct.

pub fn with_filters(self, filters: FilterAnnounce) -> Self

Returns a copy announcing the served consumer-filter evaluation.

pub const fn unavailable(self) -> Self

pub fn with_backends(self, backends: Vec<BackendDescriptor>) -> Self

Returns a copy advertising backends.

pub fn with_topology(self, topology: WireTopology) -> Self

Returns a copy advertising the deployment’s topology.

Trait Implementations

impl Clone for BackendAnnounce

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BackendAnnounce

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for BackendAnnounce

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for BackendAnnounce

impl PartialEq for BackendAnnounce

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for BackendAnnounce

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for BackendAnnounce

impl Validate for BackendAnnounce

fn validate(&self) -> Result<(), InvalidError>

Reject a request that violates a pinned cap or a structural rule.