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| Introduction |
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| 2 版本管理 |
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| 3 源码构建 |
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| 4 框架设计 |
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| 5 扩展点加载 |
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| <li class="chapter " data-level="1.7" data-path="SPI参考手册/introduction.html"> |
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| 6 SPI参考手册 |
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| 6.1 协议扩展 |
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| 6.2 调用拦截扩展 |
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| </a> |
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| 6.3 引用监听扩展 |
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| </a> |
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| <li class="chapter " data-level="1.7.4" data-path="SPI参考手册/暴露监听扩展.html"> |
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| <a href="SPI参考手册/暴露监听扩展.html"> |
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| 6.4 暴露监听扩展 |
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| </a> |
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| <li class="chapter " data-level="1.7.5" data-path="SPI参考手册/集群扩展.html"> |
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| <a href="SPI参考手册/集群扩展.html"> |
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| 6.5 集群扩展 |
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| </a> |
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| <li class="chapter " data-level="1.7.6" data-path="SPI参考手册/路由扩展.html"> |
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| <a href="SPI参考手册/路由扩展.html"> |
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| 6.6 路由扩展 |
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| </a> |
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| <li class="chapter " data-level="1.7.7" data-path="SPI参考手册/负载均衡扩展.html"> |
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| <a href="SPI参考手册/负载均衡扩展.html"> |
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| 6.7 负载均衡扩展 |
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| </a> |
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| <li class="chapter " data-level="1.7.8" data-path="SPI参考手册/合并结果扩展.html"> |
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| <a href="SPI参考手册/合并结果扩展.html"> |
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| 6.8 合并结果扩展 |
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| </a> |
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| <li class="chapter " data-level="1.7.9" data-path="SPI参考手册/注册中心扩展.html"> |
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| <a href="SPI参考手册/注册中心扩展.html"> |
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| 6.9 注册中心扩展 |
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| </a> |
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| <li class="chapter " data-level="1.7.10" data-path="SPI参考手册/监控中心扩展.html"> |
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| <a href="SPI参考手册/监控中心扩展.html"> |
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| 6.10 监控中心扩展 |
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| </a> |
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| <li class="chapter " data-level="1.7.11" data-path="SPI参考手册/扩展点加载扩展.html"> |
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| <a href="SPI参考手册/扩展点加载扩展.html"> |
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| 6.11 扩展点加载扩展 |
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| </a> |
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| <li class="chapter " data-level="1.7.12" data-path="SPI参考手册/动态代理扩展.html"> |
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| <a href="SPI参考手册/动态代理扩展.html"> |
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| 6.12 动态代理扩展 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.7.13" data-path="SPI参考手册/编译器扩展.html"> |
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| <a href="SPI参考手册/编译器扩展.html"> |
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| 6.13 编译器扩展 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.7.14" data-path="SPI参考手册/消息派发扩展.html"> |
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| <a href="SPI参考手册/消息派发扩展.html"> |
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| 6.14 消息派发扩展 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.7.15" data-path="SPI参考手册/线程池扩展.html"> |
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| <a href="SPI参考手册/线程池扩展.html"> |
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| 6.15 线程池扩展 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.7.16" data-path="SPI参考手册/序列化扩展.html"> |
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| <a href="SPI参考手册/序列化扩展.html"> |
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| 6.16 序列化扩展 |
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| </a> |
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| <li class="chapter " data-level="1.7.17" data-path="SPI参考手册/网络传输扩展.html"> |
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| <a href="SPI参考手册/网络传输扩展.html"> |
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| 6.17 网络传输扩展 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.7.18" data-path="SPI参考手册/信息交换扩展.html"> |
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| <a href="SPI参考手册/信息交换扩展.html"> |
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| 6.18 信息交换扩展 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.7.19" data-path="SPI参考手册/组网扩展.html"> |
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| <a href="SPI参考手册/组网扩展.html"> |
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| 6.19 组网扩展 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.7.20" data-path="SPI参考手册/Telnet命令扩展.html"> |
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| <a href="SPI参考手册/Telnet命令扩展.html"> |
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| 6.20 Telnet命令扩展 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.7.21" data-path="SPI参考手册/状态检查扩展.html"> |
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| <a href="SPI参考手册/状态检查扩展.html"> |
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| 6.21 状态检查扩展 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.7.22" data-path="SPI参考手册/容器扩展.html"> |
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| <a href="SPI参考手册/容器扩展.html"> |
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| 6.22 容器扩展 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.7.23" data-path="SPI参考手册/页面扩展.html"> |
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| <a href="SPI参考手册/页面扩展.html"> |
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| 6.23 页面扩展 |
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| </a> |
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| <li class="chapter " data-level="1.7.24" data-path="SPI参考手册/缓存扩展.html"> |
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| <a href="SPI参考手册/缓存扩展.html"> |
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| 6.24 缓存扩展 |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.7.25" data-path="SPI参考手册/验证扩展.html"> |
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| <a href="SPI参考手册/验证扩展.html"> |
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| 6.25 验证扩展 |
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| </a> |
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| <a href="SPI参考手册/日志适配扩展.html"> |
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| 6.26 日志适配扩展 |
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| </a> |
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| <li class="chapter " data-level="1.8" data-path="技术兼容性测试.html"> |
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| 7 技术兼容性测试 |
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| 8 公共契约 |
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| 9 坏味道 |
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| 10 编码约定 |
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| <a href="检查列表.html"> |
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| 11 检查列表 |
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| <li class="chapter " data-level="1.13" data-path="设计原则.html"> |
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| 12 设计原则 |
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| <!-- Title --> |
| <h1> |
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| <a href="." >2 版本管理</a> |
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| <p><strong>新功能的开发</strong> 和 <strong>稳定性的提高</strong> 对产品都很重要。</p> |
| <p>但是添加新功能会影响稳定性，Dubbo使用如下的版本开发模式来保障两者。</p> |
| <h4 id="2个版本并行开发">2个版本并行开发</h4> |
| <ul> |
| <li>BugFix版本：低版本，比如2.4.x。是GA版本，线上使用的版本，只会BugFix，升级第三位版本号。</li> |
| <li>新功能版本：高版本，比如2.5.x。加新功能的版本，会给对新功能有需求的应用试用。</li> |
| </ul> |
| <p>2.5.x的新功能基本稳定后，进入2.5.x试用阶段。找足够多的应用试用2.5.x版本。</p> |
| <p>在2.5.x够稳定后：</p> |
| <ul> |
| <li>2.5.x成为GA版本，只BugFix，推广使用此版本。如何可行，可以推进应用在期望的时间点内升级到GA版本。</li> |
| <li>2.4.x不再开发，应用碰到Bug让直接升级。（这个称为“夕阳条款”）</li> |
| <li>从2.5.x拉成分支2.6.0，作为新功能开发版本。</li> |
| </ul> |
| <h4 id="优势">优势</h4> |
| <ul> |
| <li>保持GA版本是稳定的！因为：<ul> |
| <li>只会作BugFix</li> |
| <li>成为GA版本前有试用阶段</li> |
| </ul> |
| </li> |
| <li>新功能可以高版本中快速响应，并让应用能试用新功能。</li> |
| <li>不会版本过多，导致开发和维护成本剧增</li> |
| </ul> |
| <h4 id="用户要配合的职责">用户要配合的职责</h4> |
| <p>由于开发只会BugFix GA版本，所以用户需要积极跟进升级到GA版本，以Fix发现的问题。</p> |
| <p>定期升级版本用户带来了不安。这是一个假命题，说明如下：</p> |
| <ul> |
| <li>GA经过一个试用阶段保持稳定。</li> |
| <li>GA版本有Bug会火速Fix</li> |
| <li>相对出问题才升级到GA版本（可以跨了多个版本）定期升级平摊风险（类似小步快跑）。经历过周期长的大项目的同学会有这样的经历，三方库版本长时间不升级，结果出了问题不得不升级到新版本（跨了多个版本）风险巨大。</li> |
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| </body> |
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