Struct StateBlob 

pub struct StateBlob {
    pub kind: String,
    pub version: u32,
    pub data: Value,
}

A typed, versioned piece of state persisted through storage.

This is the replacement for Optuna’s system_attrs junk drawer: sampler and scheduler state is data, not object innards. It is serializable, so it survives a process restart and works across machines; it carries a kind and a version, so a backend can refuse to hand a v1 blob to code expecting v2 instead of deserializing garbage.

use atune_core::storage::StateBlob;
use serde::{Deserialize, Serialize};

#[derive(Debug, PartialEq, Serialize, Deserialize)]
struct RungTable { rungs: Vec<u64> }

let blob = StateBlob::encode("asha", 1, &RungTable { rungs: vec![1, 3, 9] }).unwrap();
assert!(blob.is("asha", 1));
assert_eq!(blob.decode::<RungTable>().unwrap().rungs, vec![1, 3, 9]);

Fields

kind: String

What produced the blob ("tpe", "asha", …). Namespaces the payload inside a Scope.

version: u32

The payload’s schema version, owned by whoever wrote it.

data: Value

The payload.

Implementations

impl StateBlob

pub fn new(kind: impl Into<String>, version: u32, data: Value) -> Self

Wraps an already-serialized payload.

pub fn encode<T>( kind: impl Into<String>, version: u32, value: &T, ) -> Result<Self>

where T: Serialize + ?Sized,

Serializes value into a blob.

Errors

Error::Storage if the value cannot be serialized.

pub fn decode<T>(&self) -> Result<T>

where T: DeserializeOwned,

Deserializes the payload.

The caller is expected to have checked is first; a blob written by a different producer will usually fail here rather than silently decode.

Errors

Error::Storage if the payload does not match T.

pub fn is(&self, kind: &str, version: u32) -> bool

true if the blob was written by kind at version.

pub fn ensure_schema_compatible(&self, replacement: &Self) -> Result<()>

Rejects replacing this blob with a different kind or schema version.

Lifecycle backends call this while holding their owner/transaction fence. A typed writer may replace the payload, but it must not replace an incompatible canonical blob and thereby erase data it cannot read.

Errors

Error::Incompatible if the replacement has a different kind or schema version.

Trait Implementations

impl Clone for StateBlob

fn clone(&self) -> StateBlob

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StateBlob

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for StateBlob

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for StateBlob

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for StateBlob

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 StateBlob