107 lines
3.7 KiB
Rust
107 lines
3.7 KiB
Rust
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//! chongming-worker-rs —— 进程插件 Rust SDK
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//!
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//! 语言无关线协议（docs/plugin-wire-protocol.md）的 Rust 实现：
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//! 1. 解析 config.toml 与端点 TOML，构造路由描述符并发布到 `chongming/routes/**`
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//! 2. liveliness token 注册 `worker/<type>/<id>`（服务发现）
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//! 3. Queryable 声明 `worker/<type>/<id>/<subject>`，解析请求信封并分派 handler
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//! 4. 每 10s 重发布描述符（自愈），SIGTERM/SIGINT 优雅退出时 DELETE 摘除
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//!
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//! 与 Python SDK（utils/worker/）行为等价，可同 type 混布参与同一套负载均衡。
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pub mod admin;
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pub mod cache;
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pub mod config;
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#[cfg(feature = "database")]
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pub mod database;
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pub mod descriptor;
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pub mod envelope;
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pub mod error;
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pub mod gen;
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pub mod publisher;
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pub mod runtime;
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pub mod serve;
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pub use runtime::WorkerPool;
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pub use serve::{serve, ServeOptions};
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/// 常用类型统一导出
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pub mod prelude {
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pub use crate::envelope::Request;
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pub use crate::error::{error_response, stream_error_block};
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pub use crate::publisher::{announce_loop, RoutePublisher, ANNOUNCE_INTERVAL_SECS};
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#[cfg(feature = "database")]
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pub use crate::database::Database;
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pub use crate::{HandlerRegistry, Reply};
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}
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use std::collections::HashMap;
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use std::future::Future;
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use std::pin::Pin;
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use std::sync::Arc;
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use futures_util::stream::BoxStream;
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use serde_json::Value;
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pub use envelope::Request;
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/// 异步函数指针（handler 与 announce 循环等共用）
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pub type BoxFuture<T> = Pin<Box<dyn Future<Output = T> + Send>>;
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/// 端点响应：单块 JSON，或流式多块（SSE 逐块转发）
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pub enum Reply {
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/// 普通响应：单个回复，载荷为业务结果 JSON 对象
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Json(Value),
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/// 流式响应：逐块多回复；每块 `Ok(v)` 作为独立回复块，
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/// `Err(msg)` 以 `{"error": msg}` 收尾块结束流（与 Python SDK 一致）
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Stream(BoxStream<'static, Result<Value, String>>),
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}
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/// 端点 handler：解析后的请求信封 → 业务结果
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pub type Handler = dyn Fn(Request) -> BoxFuture<Result<Reply, String>> + Send + Sync;
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/// RPC 端点注册表（按 subject + HTTP 方法分派）
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#[derive(Default)]
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pub struct HandlerRegistry {
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/// subject -> [(method, handler)]（同一 subject 可挂多个方法）
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map: HashMap<String, Vec<(String, Arc<Handler>)>>,
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}
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impl HandlerRegistry {
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pub fn new() -> Self {
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Self::default()
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}
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/// 注册端点。`f` 为 async handler：`fn(Request) -> Result<Reply, String>`。
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pub fn register<F, Fut>(&mut self, subject: &str, method: &str, f: F)
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where
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F: Fn(Request) -> Fut + Send + Sync + 'static,
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Fut: Future<Output = Result<Reply, String>> + Send + 'static,
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{
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let entry = self
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.map
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.entry(subject.to_string())
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.or_default();
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entry.push((
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method.to_uppercase(),
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Arc::new(move |req: Request| {
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Box::pin(f(req)) as Pin<Box<dyn Future<Output = Result<Reply, String>> + Send>>
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}) as Arc<Handler>,
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));
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}
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/// 该 subject+method 是否有 handler（发布前的契约自检用）
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pub fn has(&self, subject: &str, method: &str) -> bool {
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self.lookup(subject, method).is_some()
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}
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/// 按 subject+method 查 handler；无精确匹配时降级到该 subject 的第一个方法
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/// （与 Python runtime.py 的匹配逻辑一致）。
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pub fn lookup(&self, subject: &str, method: &str) -> Option<Arc<Handler>> {
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let methods = self.map.get(subject)?;
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if let Some((_, h)) = methods.iter().find(|(m, _)| m == &method.to_uppercase()) {
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return Some(h.clone());
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}
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methods.first().map(|(_, h)| h.clone())
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}
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}
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