Struct ParamState 

pub struct ParamState {
    pub value: Value,
    pub revision: u64,
    pub writer: String,
    pub timestamp: u64,
    pub last_accessed: u64,
    pub strategy: ConflictStrategy,
    pub lock_holder: Option<String>,
    pub meta: Option<ParamMeta>,
    pub origin: Option<String>,
    pub ttl: Option<Ttl>,
}

State of a single parameter

Fields

value: Value

Current value

revision: u64

Monotonic revision number

writer: String

Session ID of last writer

timestamp: u64

Timestamp of last write (microseconds)

last_accessed: u64

Timestamp of last access (microseconds) - for TTL eviction

strategy: ConflictStrategy

Conflict resolution strategy

lock_holder: Option<String>

Lock holder (if locked)

meta: Option<ParamMeta>

Metadata

origin: Option<String>

Origin router ID (for federation loop prevention)

ttl: Option<Ttl>

Per-param TTL (overrides server-wide TTL when set)

Implementations

impl ParamState

pub fn new(value: Value, writer: String) -> Self

Create a new param state

pub fn touch(&mut self)

Update the last_accessed timestamp

pub fn with_strategy(self, strategy: ConflictStrategy) -> Self

Create with specific strategy

pub fn with_meta(self, meta: ParamMeta) -> Self

Create with metadata

pub fn try_update( &mut self, new_value: Value, writer: &str, expected_revision: Option<u64>, request_lock: bool, release_lock: bool, ttl: Option<Ttl>, ) -> Result<u64, UpdateError>

Attempt to update the value

Returns Ok(new_revision) if update was accepted, Err with reason if rejected.

pub fn validate_range(&self, value: &Value) -> bool

Check if value is within range (if specified)

Trait Implementations

impl Clone for ParamState

fn clone(&self) -> ParamState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ParamState

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

Formats the value using the given formatter.