Struct MetadataCache 

pub struct MetadataCache {
    pub applied_index: u64,
    pub routing_version: u64,
    pub collections: HashMap<(u32, String), Vec<(String, String)>>,
    pub members: HashMap<u64, String>,
}

Local cache of the metadata state, updated from the Raft log.

Each node maintains this cache. The leader writes to it; followers apply committed entries from the Raft log to stay consistent.

Fields

applied_index: u64

Applied log index — entries up to this index are reflected in cache.

routing_version: u64

Cached routing table version.

collections: HashMap<(u32, String), Vec<(String, String)>>

Collection schemas: (tenant_id, collection_name) → field definitions.

members: HashMap<u64, String>

Node membership: node_id → address.

Implementations

impl MetadataCache

pub fn new() -> Self

pub fn apply(&mut self, index: u64, entry: &MetadataEntry)

Apply a metadata entry from the Raft log.

Called by the Raft commit applier when a metadata entry is committed. Updates the local cache to reflect the change.

pub fn serialize_entry(entry: &MetadataEntry) -> Result<Vec<u8>>

Serialize a metadata entry for Raft proposal.

pub fn deserialize_entry(data: &[u8]) -> Result<MetadataEntry>

Deserialize a metadata entry from Raft log data.

Trait Implementations

impl Clone for MetadataCache

fn clone(&self) -> MetadataCache

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MetadataCache

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

Formats the value using the given formatter.

impl Default for MetadataCache

fn default() -> MetadataCache

Returns the “default value” for a type.