Trait StateField

pub trait StateField:
    Send
    + Sync
    + Debug {
    // Required methods
    fn init<'life0, 'life1, 'life2, 'async_trait>(
        &'life0 self,
        config: &'life1 StateConfig,
        instance: Option<&'life2 State>,
    ) -> Pin<Box<dyn Future<Output = PluginState> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait,
             'life2: 'async_trait;
    fn apply<'life0, 'life1, 'life2, 'life3, 'async_trait>(
        &'life0 self,
        tr: &'life1 Transaction,
        value: PluginState,
        old_state: &'life2 State,
        new_state: &'life3 State,
    ) -> Pin<Box<dyn Future<Output = PluginState> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait,
             'life2: 'async_trait,
             'life3: 'async_trait;

    // Provided methods
    fn serialize(&self, _value: PluginState) -> Option<Vec<u8>> { ... }
    fn deserialize(&self, _value: &Vec<u8>) -> Option<PluginState> { ... }
}

状态字段特征 定义插件状态的管理方式，包括初始化、应用更改和序列化

Required Methods

fn init<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, config: &'life1 StateConfig, instance: Option<&'life2 State>, ) -> Pin<Box<dyn Future<Output = PluginState> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait,

初始化插件状态

fn apply<'life0, 'life1, 'life2, 'life3, 'async_trait>( &'life0 self, tr: &'life1 Transaction, value: PluginState, old_state: &'life2 State, new_state: &'life3 State, ) -> Pin<Box<dyn Future<Output = PluginState> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait, 'life3: 'async_trait,

应用状态变更 根据事务内容更新插件状态

Provided Methods

fn serialize(&self, _value: PluginState) -> Option<Vec<u8>>

序列化插件状态

fn deserialize(&self, _value: &Vec<u8>) -> Option<PluginState>

反序列化插件状态

Implementors