Struct Deployment 

pub struct Deployment<I> {
    pub generation: u64,
    pub registry: Registry,
    pub plugin: Arc<I>,
}

One consistent view of registration metadata and executable code. 注册元数据与可执行代码的一致视图。

Fields

generation: u64

Monotonic counter; compare successive snapshots to notice a swap. Starts at 0. 单调递增的计数器；比较前后快照即可察觉替换。初始为 0。

registry: Registry

Registry snapshot that matches plugin. 与 plugin 相匹配的注册树快照。

plugin: Arc<I>

Plugin instance serving this snapshot; the Arc keeps it alive for readers. 服务该快照的插件实例；Arc 让读者持有期间其保持存活。