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docs(architecture): update startup/register-chain flow for AgentBootstrap and registerContext
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# Agent 注册链
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本文说明 `AgentRegisterFactory.launch(packageName)` 内部的注册链。注册链的职责是基于应用包与外部模块目录扫描结果,完成组件、模块、Capability、生命周期方法和关闭方法的注册。
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本文说明 `AgentRegisterFactory.launch(registerContext)` 内部的注册链。注册链的职责是基于启动层已经构建好的 `AgentRegisterContext`,完成组件、模块、Capability、生命周期方法和关闭方法的注册。
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`AgentRegisterContext` 是注册链上下文。它持有 `Reflections` 扫描器,以及供各阶段读写的 `ComponentFactoryContext`、`CapabilityFactoryContext` 和全局 `AgentContext`。
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```mermaid
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flowchart TD
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A["AgentRegisterFactory.launch(packageName)"] --> B["packageNameToURL(packageName)"]
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B --> C["创建 AgentRegisterContext"]
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A["AgentApp.launch()"] --> B["构建最终 AgentRegisterContext"]
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B --> C["AgentRegisterFactory.launch(registerContext)"]
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subgraph CTX["AgentRegisterContext"]
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direction TB
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@@ -2,54 +2,131 @@
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本文说明 `Agent.newAgent(appClass).launch()` 的外层启动顺序。
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`Agent.launch()` 负责拉起基础单例、注册配置参与者、注册 Gateway、安装关闭钩子、添加外部模块目录,并启动注册工厂。组件扫描、模块实例化和能力注册的细节见 [注册链](register-chain.md)。
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`AgentApp.launch()` 负责拉起基础单例、构建扫描上下文、执行启动前扩展、注册配置参与者、注册 Gateway、安装关闭钩子,并把最终 `AgentRegisterContext` 交给注册工厂。组件扫描、模块实例化和能力注册的细节见 [注册链](register-chain.md)。
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## 启动前扩展:AgentBootstrap
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`Agent.AgentBootstrap` 是启动前扩展点。它会在正式组件注册链执行前被扫描、实例化并执行 `boot()`。
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Bootstrap 实现类需要继承 `Agent.AgentBootstrap`,并提供 `Agent.AgentApp` 构造器:
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```java
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public final class PartnerAgentBootstrap extends Agent.AgentBootstrap {
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public PartnerAgentBootstrap(Agent.AgentApp agentApp) {
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super(agentApp);
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}
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@Override
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protected void bootstrap() {
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addGatewayRegistration(WebSocketGatewayRegistration.INSTANCE);
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addConfigurable(new VectorClientRegistry());
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}
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}
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```
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Bootstrap 可用于声明启动前基础设施扩展:
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- `addGatewayRegistration(...)`
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- `addConfigurable(...)`
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- `addExceptionReporter(...)`
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- `addPreShutdownHook(...)`
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- `addPostShutdownHook(...)`
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- `addScanPackage(...)`
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- `addScanDir(...)`
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Bootstrap 按 `order()` 升序执行,默认 `order()` 为 `0`。
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## 外层启动顺序
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```mermaid
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flowchart TD
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A["Agent.newAgent(appClass).launch()"] --> B["加载基础单例<br/>ConfigCenter / StateCenter"]
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B --> C["注册 ExceptionReporter"]
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B --> C["准备基础扫描范围"]
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C --> D
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subgraph D["注册 Configurable"]
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subgraph C["基础扫描范围"]
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direction TB
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D1["LogAdviceProvider.register()"]
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D2["ModelRuntimeRegistry.register()"]
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D3["AgentGatewayRegistry.register()"]
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D4["应用传入的 Configurable.register()"]
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C1["application package"]
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C2["外部模块目录<br/>resources/module/*.jar"]
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end
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D --> E["注册 AgentGatewayRegistration"]
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C --> D["构建 bootstrap AgentRegisterContext"]
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D --> E["扫描 AgentBootstrap"]
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E --> F["实例化并执行 bootstrap()"]
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E --> F
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F --> G["Bootstrap 扩展 AgentApp"]
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subgraph F["注册关闭钩子"]
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subgraph G["Bootstrap 可扩展内容"]
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direction TB
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F1["preShutdown<br/>AgentGatewayRegistry.close()"]
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F2["preShutdown hooks"]
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F3["postShutdown<br/>StateCenter.save()"]
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F4["postShutdown<br/>TraceSinkRegistry.close()"]
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F5["postShutdown<br/>ConfigCenter.close()"]
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F6["postShutdown hooks"]
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F1 --> F2
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F3 --> F4 --> F5 --> F6
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G1["GatewayRegistration"]
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G2["Configurable"]
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G3["ExceptionReporter"]
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G4["pre/post shutdown hook"]
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G5["scan package / scan dir"]
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end
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F --> G["添加外部模块扫描目录<br/>resources/module"]
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G --> H["启动注册工厂<br/>AgentRegisterFactory.launch(application package)"]
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G --> H["重建最终 AgentRegisterContext"]
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H --> I
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H --> I["注册 ExceptionReporter"]
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subgraph I["初始化配置系统"]
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I --> J
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subgraph J["注册 Configurable"]
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direction TB
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I1["ConfigCenter.initAll()<br/>初始化已注册的 Configurable"]
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I2["触发各 Configurable.init(config, json)"]
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I3["ConfigCenter.start()<br/>启动配置监听"]
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I1 --> I2 --> I3
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J1["LogAdviceProvider.register()"]
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J2["ModelRuntimeRegistry.register()"]
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J3["AgentGatewayRegistry.register()"]
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J4["Bootstrap / 应用声明的 Configurable.register()"]
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end
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I --> K["Agent 启动完成"]
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J --> K["注册 AgentGatewayRegistration"]
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K --> L
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subgraph L["注册关闭钩子"]
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direction TB
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L1["preShutdown<br/>AgentGatewayRegistry.close()"]
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L2["Bootstrap / 应用声明的 preShutdown hooks"]
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L3["postShutdown<br/>StateCenter.save()"]
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L4["postShutdown<br/>TraceSinkRegistry.close()"]
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L5["postShutdown<br/>ConfigCenter.close()"]
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L6["Bootstrap / 应用声明的 postShutdown hooks"]
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L1 --> L2
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L3 --> L4 --> L5 --> L6
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end
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L --> M["启动注册工厂<br/>AgentRegisterFactory.launch(registerContext)"]
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M --> N
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subgraph N["初始化配置系统"]
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direction TB
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N1["ConfigCenter.initAll()<br/>初始化已注册的 Configurable"]
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N2["触发各 Configurable.init(config, json)"]
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N3["ConfigCenter.start()<br/>启动配置监听"]
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N1 --> N2 --> N3
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end
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N --> O["Agent 启动完成"]
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```
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## 扫描上下文
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`AgentApp` 现在负责维护扫描输入并构建 `AgentRegisterContext`。
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默认扫描输入包括:
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- `applicationClass.getPackageName()` 对应的 classpath package URL
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- `ConfigCenter.INSTANCE.getPaths().getResourcesDir().resolve("module")` 下的 `*.jar`
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启动时会构建两次扫描上下文:
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1. **bootstrap context**:用于发现 `AgentBootstrap`。
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2. **final register context**:在 `AgentBootstrap.boot()` 可能追加 scan package / scan dir 后重建,用于后续 `AgentRegisterFactory.launch(registerContext)`。
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`AgentRegisterFactory` 现在只负责执行注册链。它接收已经构建好的 `AgentRegisterContext`,不再是主启动链路里扫描上下文的拥有者。旧的 `launch(packageName)` 仍可作为兼容入口使用。
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## Gateway 启动时机
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Gateway 的实际 `launch()` 不在 `AgentGatewayRegistration.register()` 中直接发生。Gateway registration 只把可用通道注册到 `AgentGatewayRegistry`;真正的通道创建、启动和默认响应通道设置发生在 `ConfigCenter.initAll()` 阶段,由 `AgentGatewayRegistry.init()` 根据 `gateway.json` 执行。
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