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| 4 示例 |
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| 4.1 启动时检查 |
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| 4.3 负载均衡 |
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| 4.4 线程模型 |
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| 4.6 只订阅 |
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| 4.7 只注册 |
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| 4.8 静态服务 |
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| 4.9 多协议 |
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| 4.10 多注册中心 |
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| 4.11 服务分组 |
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| 4.13 多版本 |
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| 4.14 分组聚合 |
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| </a> |
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| 4.15 参数验证 |
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| </a> |
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| 4.16 结果缓存 |
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| </a> |
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| 4.17 泛化引用 |
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| <li class="chapter " data-level="1.5.17" data-path="../demos/泛化实现.html"> |
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| 4.18 泛化实现 |
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| </a> |
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| <li class="chapter " data-level="1.5.18" data-path="../demos/回声测试.html"> |
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| <a href="../demos/回声测试.html"> |
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| 4.19 回声测试 |
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| </a> |
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| <li class="chapter " data-level="1.5.19" data-path="../demos/上下文信息.html"> |
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| <a href="../demos/上下文信息.html"> |
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| 4.20 上下文信息 |
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| </a> |
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| <li class="chapter " data-level="1.5.20" data-path="../demos/隐式参数.md"> |
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| 4.21 隐式参数 |
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| </a> |
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| <li class="chapter " data-level="1.5.21" data-path="../demos/异步调用.html"> |
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| <a href="../demos/异步调用.html"> |
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| 4.22 异步调用 |
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| </a> |
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| <li class="chapter " data-level="1.5.22" data-path="../demos/本地调用.html"> |
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| <a href="../demos/本地调用.html"> |
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| 4.23 本地调用 |
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| </a> |
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| <li class="chapter " data-level="1.5.23" data-path="../demos/参数回调.html"> |
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| <a href="../demos/参数回调.html"> |
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| 4.24 参数回调 |
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| </a> |
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| <a href="../demos/事件通知.html"> |
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| 4.25 事件通知 |
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| </a> |
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| <li class="chapter " data-level="1.5.25" data-path="../demos/本地存根.html"> |
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| <a href="../demos/本地存根.html"> |
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| 4.26 本地存根 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.5.26" data-path="../demos/本地伪装.html"> |
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| <a href="../demos/本地伪装.html"> |
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| 4.27 本地伪装 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.5.27" data-path="../demos/延迟暴露.html"> |
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| <a href="../demos/延迟暴露.html"> |
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| 4.28 延迟暴露 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.5.28" data-path="../demos/并发控制.html"> |
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| <a href="../demos/并发控制.html"> |
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| 4.29 并发控制 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.5.29" data-path="../demos/连接控制.html"> |
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| <a href="../demos/连接控制.html"> |
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| 4.30 连接控制 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.5.30" data-path="../demos/延迟连接.html"> |
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| <a href="../demos/延迟连接.html"> |
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| 4.31 延迟连接 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.5.31" data-path="../demos/粘滞连接.html"> |
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| <a href="../demos/粘滞连接.html"> |
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| 4.32 粘滞连接 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.5.32" data-path="../demos/令牌验证.html"> |
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| <a href="../demos/令牌验证.html"> |
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| 4.33 令牌验证 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.5.33" data-path="../demos/路由规则.html"> |
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| <a href="../demos/路由规则.html"> |
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| 4.34 路由规则 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.5.34" data-path="../demos/配置规则.html"> |
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| <a href="../demos/配置规则.html"> |
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| 4.35 配置规则 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.5.35" data-path="../demos/服务降级.html"> |
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| <a href="../demos/服务降级.html"> |
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| 4.36 服务降级 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.5.36" data-path="../demos/优雅停机.html"> |
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| <a href="../demos/优雅停机.html"> |
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| 4.37 优雅停机 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.5.37" data-path="../demos/主机绑定.html"> |
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| <a href="../demos/主机绑定.html"> |
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| 4.38 主机绑定 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.5.38" data-path="../demos/日志适配.html"> |
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| <a href="../demos/日志适配.html"> |
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| 4.39 日志适配 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.5.39" data-path="../demos/访问日志.html"> |
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| <a href="../demos/访问日志.html"> |
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| 4.40 访问日志 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.5.40" data-path="../demos/服务容器.html"> |
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| <a href="../demos/服务容器.html"> |
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| 4.41 服务容器 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.5.41" data-path="../demos/ReferenceConfig缓存.html"> |
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| <a href="../demos/ReferenceConfig缓存.html"> |
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| 4.42 Reference Config缓存 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.5.42" data-path="../demos/分布式事务.html"> |
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| <a href="../demos/分布式事务.html"> |
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| 4.43 分布式事务 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.5.43" data-path="../reference-apiconf/api.html"> |
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| <a href="../reference-apiconf/api.html"> |
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| 5 API参考手册 |
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| </a> |
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| </li> |
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| </ul> |
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| </li> |
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| <li class="chapter " data-level="1.6" data-path="../reference-xmlconf/introduction.html"> |
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| <a href="../reference-xmlconf/introduction.html"> |
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| 5 schema配置参考手册 |
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| </a> |
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| <ul class="articles"> |
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| <li class="chapter " data-level="1.6.1" data-path="../reference-xmlconf/dubbo-service.html"> |
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| <a href="../reference-xmlconf/dubbo-service.html"> |
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| 5.1 dubbo:service |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.6.2" data-path="../reference-xmlconf/dubbo-reference.html"> |
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| <a href="../reference-xmlconf/dubbo-reference.html"> |
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| 5.2 dubbo:reference |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.6.3" data-path="../reference-xmlconf/dubbo-protocol.html"> |
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| <a href="../reference-xmlconf/dubbo-protocol.html"> |
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| 5.3 dubbo:protocol |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.6.4" data-path="../reference-xmlconf/dubbo-registry.html"> |
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| <a href="../reference-xmlconf/dubbo-registry.html"> |
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| 5.4 dubbo:registry |
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| </a> |
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| |
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| </li> |
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| <li class="chapter " data-level="1.6.5" data-path="../reference-xmlconf/dubbo-monitor.html"> |
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| <a href="../reference-xmlconf/dubbo-monitor.html"> |
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| 5.5 dubbo:monitor |
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| </a> |
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| |
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| </li> |
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| <li class="chapter " data-level="1.6.6" data-path="../reference-xmlconf/dubbo-application.html"> |
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| <a href="../reference-xmlconf/dubbo-application.html"> |
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| 5.6 dubbo:application |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.6.7" data-path="../reference-xmlconf/dubbo-module.html"> |
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| <a href="../reference-xmlconf/dubbo-module.html"> |
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| 5.7 dubbo:module |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.6.8" data-path="../reference-xmlconf/dubbo-provider.html"> |
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| <a href="../reference-xmlconf/dubbo-provider.html"> |
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| 5.8 dubbo:provider |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.6.9" data-path="../reference-xmlconf/dubbo-consumer.html"> |
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| <a href="../reference-xmlconf/dubbo-consumer.html"> |
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| 5.9 dubbo:consumer |
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| <li class="chapter " data-level="1.6.10" data-path="../reference-xmlconf/dubbo-method.html"> |
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| <a href="../reference-xmlconf/dubbo-method.html"> |
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| 5.10 dubbo:method |
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| </li> |
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| <li class="chapter " data-level="1.6.11" data-path="../reference-xmlconf/dubbo-argument.html"> |
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| <a href="../reference-xmlconf/dubbo-argument.html"> |
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| 5.11 dubbo:argument |
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| </a> |
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| <li class="chapter " data-level="1.6.12" data-path="../reference-xmlconf/dubbo-parameter.html"> |
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| <a href="../reference-xmlconf/dubbo-parameter.html"> |
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| 5.12 dubbo:parameter |
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| </a> |
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| </li> |
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| 6 协议参考手册 |
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| <li class="chapter " data-level="1.7.1" data-path="../reference-protocol/dubbo.html"> |
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| <a href="../reference-protocol/dubbo.html"> |
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| 6.1 dubbo:// |
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| </a> |
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| <li class="chapter " data-level="1.7.2" data-path="../reference-protocol/rmi.html"> |
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| 6.2 rmi// |
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| <li class="chapter " data-level="1.7.3" data-path="../reference-protocol/hessian.html"> |
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| <a href="../reference-protocol/hessian.html"> |
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| 6.3 hessian:// |
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| 6.4 http:// |
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| <li class="chapter " data-level="1.7.5" data-path="../reference-protocol/webservice.html"> |
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| <a href="../reference-protocol/webservice.html"> |
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| 6.5 webservice:// |
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| </a> |
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| <li class="chapter " data-level="1.7.6" data-path="../reference-protocol/thrift.html"> |
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| <a href="../reference-protocol/thrift.html"> |
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| 6.6 thrift:// |
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| </a> |
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| 6.7 memcached:// |
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| </a> |
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| <li class="chapter " data-level="1.7.8" data-path="../reference-protocol/redis.html"> |
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| 6.8 redis:// |
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| <li class="chapter " data-level="1.8" data-path="../reference-registry/introduction.html"> |
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| <a href="../reference-registry/introduction.html"> |
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| 7 注册中心参考手册 |
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| <ul class="articles"> |
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| <li class="chapter " data-level="1.8.1" data-path="../reference-registry/multicast.html"> |
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| <a href="../reference-registry/multicast.html"> |
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| 7.1 Multicast注册中心 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.8.2" data-path="../reference-registry/zookeeper.html"> |
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| <a href="../reference-registry/zookeeper.html"> |
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| 7.2 Zookeeper注册中心 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.8.3" data-path="../reference-registry/redis.html"> |
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| <a href="../reference-registry/redis.html"> |
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| 7.3 Redis注册中心 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.8.4" data-path="../reference-registry/simple.html"> |
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| <a href="../reference-registry/simple.html"> |
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| 7.4 Simple注册中心 |
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| </a> |
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| </li> |
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| <a href="../reference-telnet/telnet.html"> |
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| 8 telnet命令参考手册 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.10" data-path="../reference-maven/maven.html"> |
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| <a href="../reference-maven/maven.html"> |
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| 9 maven插件参考手册 |
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| </a> |
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| <li class="chapter " data-level="1.11" data-path="../best-practice.html"> |
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| 10 服务化最佳实践 |
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| </a> |
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| <a href="../recommend.html"> |
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| 11 推荐用法 |
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| </a> |
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| 12 容量规划 |
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| <li class="chapter " data-level="1.14" data-path="../benchmark.html"> |
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| <a href="../benchmark.html"> |
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| 13 基准测试工具包 |
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| 15 测试覆盖率报告 |
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| <ul> |
| <li><strong>节点角色说明:</strong></li> |
| <li>Provider: 暴露服务的服务提供方</li> |
| <li>Consumer: 调用远程服务的服务消费方。</li> |
| <li>Registry: 服务注册与发现的注册中心。</li> |
| <li>Monitor: 统计服务的调用次调和调用时间的监控中心。</li> |
| <li>Container: 服务运行容器。</li> |
| </ul> |
| <p><img src="../sources/images/dubbo-architecture.jpg" alt="dubbo-architucture"></p> |
| <ul> |
| <li><strong>调用关系说明:</strong></li> |
| <li>服务容器负责启动,加载,运行服务提供者。</li> |
| <li>服务提供者在启动时,向注册中心注册自己提供的服务。</li> |
| <li>服务消费者在启动时,向注册中心订阅自己所需的服务。</li> |
| <li>注册中心返回服务提供者地址列表给消费者,如果有变更,注册中心将基于长连接推送变更数据给消费者。</li> |
| <li>服务消费者,从提供者地址列表中,基于软负载均衡算法,选一台提供者进行调用,如果调用失败,再选另一台调用。</li> |
| <li>服务消费者和提供者,在内存中累计调用次数和调用时间,定时每分钟发送一次统计数据到监控中心。</li> |
| </ul> |
| <p>(1) 连通性: |
| 注册中心负责服务地址的注册与查找,相当于目录服务,服务提供者和消费者只在启动时与注册中心交互,注册中心不转发请求,压力较小 |
| 监控中心负责统计各服务调用次数,调用时间等,统计先在内存汇总后每分钟一次发送到监控中心服务器,并以报表展示 |
| 服务提供者向注册中心注册其提供的服务,并汇报调用时间到监控中心,此时间不包含网络开销 |
| 服务消费者向注册中心获取服务提供者地址列表,并根据负载算法直接调用提供者,同时汇报调用时间到监控中心,此时间包含网络开销 |
| 注册中心,服务提供者,服务消费者三者之间均为长连接,监控中心除外 |
| 注册中心通过长连接感知服务提供者的存在,服务提供者宕机,注册中心将立即推送事件通知消费者 |
| 注册中心和监控中心全部宕机,不影响已运行的提供者和消费者,消费者在本地缓存了提供者列表 |
| 注册中心和监控中心都是可选的,服务消费者可以直连服务提供者</p> |
| <p>(2) 健状性: |
| 监控中心宕掉不影响使用,只是丢失部分采样数据 |
| 数据库宕掉后,注册中心仍能通过缓存提供服务列表查询,但不能注册新服务 |
| 注册中心对等集群,任意一台宕掉后,将自动切换到另一台 |
| 注册中心全部宕掉后,服务提供者和服务消费者仍能通过本地缓存通讯 |
| 服务提供者无状态,任意一台宕掉后,不影响使用 |
| 服务提供者全部宕掉后,服务消费者应用将无法使用,并无限次重连等待服务提供者恢复</p> |
| <p>(3) 伸缩性: |
| 注册中心为对等集群,可动态增加机器部署实例,所有客户端将自动发现新的注册中心 |
| 服务提供者无状态,可动态增加机器部署实例,注册中心将推送新的服务提供者信息给消费者</p> |
| <p>(4) 升级性: |
| 当服务集群规模进一步扩大,带动IT治理结构进一步升级,需要实现动态部署,进行流动计算,现有分布式服务架构不会带来阻力:</p> |
| <p><img src="../sources/images/dubbo-architecture-future.jpg" alt="dubbo-architucture"></p> |
| <ul> |
| <li>Deployer: 自动部署服务的本地代理。</li> |
| <li>Repository: 仓库用于存储服务应用发布包。</li> |
| <li>Scheduler: 调度中心基于访问压力自动增减服务提供者。</li> |
| <li>Admin: 统一管理控制台。</li> |
| </ul> |
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