Struct RetentionPolicy 

pub struct RetentionPolicy {
    pub max_age_days: Option<u32>,
    pub max_sessions: Option<u32>,
}

保留策略：任一字段为 None 表示不限该维度。

Fields

max_age_days: Option<u32>

会话 endedAt 超过 max_age_days 被清理（未结束的会话不清理）。

max_sessions: Option<u32>

按 startedAt 倒序保留 max_sessions 条，余者清理。

Implementations

impl RetentionPolicy

pub fn is_empty(&self) -> bool

Trait Implementations

impl Clone for RetentionPolicy

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 RetentionPolicy

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

Formats the value using the given formatter.

impl Default for RetentionPolicy

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for RetentionPolicy

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for RetentionPolicy

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

where __S: Serializer,

Serialize this value into the given Serde serializer.