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| 4.14 分组聚合 |
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| 4.15 参数验证 |
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| 4.16 结果缓存 |
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| 4.18 泛化实现 |
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| 4.19 回声测试 |
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| 4.20 上下文信息 |
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| 4.21 隐式参数 |
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| 4.22 异步调用 |
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| 4.23 本地调用 |
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| 4.24 参数回调 |
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| 4.25 事件通知 |
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| 4.26 本地存根 |
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| 4.27 本地伪装 |
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| 4.28 延迟暴露 |
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| <a href="并发控制.html"> |
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| 4.29 并发控制 |
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| </a> |
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| 4.30 连接控制 |
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| </a> |
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| <li class="chapter " data-level="1.5.30" data-path="延迟连接.html"> |
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| 4.31 延迟连接 |
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| </a> |
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| 4.32 粘滞连接 |
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| </a> |
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| 4.33 令牌验证 |
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| </a> |
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| <a href="路由规则.html"> |
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| 4.34 路由规则 |
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| </a> |
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| <a href="配置规则.html"> |
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| 4.35 配置规则 |
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| </a> |
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| <a href="服务降级.html"> |
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| 4.36 服务降级 |
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| </a> |
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| 4.37 优雅停机 |
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| </a> |
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| <a href="主机绑定.html"> |
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| 4.38 主机绑定 |
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| </a> |
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| <a href="日志适配.html"> |
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| 4.39 日志适配 |
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| </a> |
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| <a href="访问日志.html"> |
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| 4.40 访问日志 |
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| </a> |
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| <a href="服务容器.html"> |
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| 4.41 服务容器 |
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| </a> |
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| <a href="ReferenceConfig缓存.html"> |
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| 4.42 Reference Config缓存 |
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| </a> |
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| <a href="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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| </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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| </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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| |
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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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| |
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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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| 6 协议参考手册 |
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| <ul class="articles"> |
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| 6.1 dubbo:// |
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| </a> |
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| </li> |
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| 6.2 rmi// |
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| </a> |
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| <a href="../reference-protocol/hessian.html"> |
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| 6.3 hessian:// |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.7.4" data-path="../reference-protocol/http.html"> |
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| <a href="../reference-protocol/http.html"> |
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| 6.4 http:// |
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| </a> |
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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> |
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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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| </li> |
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| <li class="chapter " data-level="1.7.7" data-path="../reference-protocol/memcached.html"> |
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| <a href="../reference-protocol/memcached.html"> |
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| 6.7 memcached:// |
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| </a> |
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| </li> |
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| <li class="chapter " data-level="1.7.8" data-path="../reference-protocol/redis.html"> |
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| <a href="../reference-protocol/redis.html"> |
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| 6.8 redis:// |
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| </a> |
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| </li> |
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| 7 注册中心参考手册 |
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| 7.1 Multicast注册中心 |
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| 7.2 Zookeeper注册中心 |
| |
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| 7.3 Redis注册中心 |
| |
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| 7.4 Simple注册中心 |
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| <h1> |
| <i class="fa fa-circle-o-notch fa-spin"></i> |
| <a href=".." >4.34 路由规则</a> |
| </h1> |
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| <blockquote> |
| <p><img src="../sources/images/warning-3.gif" alt="warning">2.2.0以上版本支持,</p> |
| <p><img src="../sources/images/check.gif" alt="warning">路由规则扩展点：<a href="#">路由扩展</a></p> |
| </blockquote> |
| <p>向注册中心写入路由规则：(通常由监控中心或治理中心的页面完成)</p> |
| <pre><code class="lang-java">RegistryFactory registryFactory = ExtensionLoader.getExtensionLoader(RegistryFactory.class).getAdaptiveExtension(); |
| Registry registry = registryFactory.getRegistry(URL.valueOf("zookeeper://10.20.153.10:2181")); |
| registry.register(URL.valueOf("condition://0.0.0.0/com.foo.BarService?category=routers&dynamic=false&rule=" + URL.encode("http://10.20.160.198/wiki/display/dubbo/host = 10.20.153.10 => host = 10.20.153.11") + ")); |
| </code></pre> |
| <p>其中：</p> |
| <ul> |
| <li>condition:// |
| 表示路由规则的类型，支持条件路由规则和脚本路由规则，可扩展，必填。</li> |
| <li>0.0.0.0 |
| 表示对所有IP地址生效，如果只想对某个IP的生效，请填入具体IP，必填。</li> |
| <li>com.foo.BarService |
| 表示只对指定服务生效，必填。</li> |
| <li>category=routers |
| 表示该数据为动态配置类型，必填。</li> |
| <li>dynamic=false |
| 表示该数据为持久数据，当注册方退出时，数据依然保存在注册中心，必填。</li> |
| <li>enabled=true |
| 覆盖规则是否生效，可不填，缺省生效。</li> |
| <li>force=false |
| 当路由结果为空时，是否强制执行，如果不强制执行，路由结果为空的路由规则将自动失效，可不填，缺省为flase。</li> |
| <li>runtime=false |
| 是否在每次调用时执行路由规则，否则只在提供者地址列表变更时预先执行并缓存结果，调用时直接从缓存中获取路由结果。 |
| 如果用了参数路由，必须设为true，需要注意设置会影响调用的性能，可不填，缺省为flase。</li> |
| <li>priority=1 |
| 路由规则的优先级，用于排序，优先级越大越靠前执行，可不填，缺省为0。</li> |
| <li>rule=URL.encode("host = 10.20.153.10 => host = 10.20.153.11") |
| 表示路由规则的内容，必填。</li> |
| </ul> |
| <h4 id="条件路由规则">条件路由规则</h4> |
| <p>基于条件表达式的路由规则，如：<code>host = 10.20.153.10 => host = 10.20.153.11</code></p> |
| <p>规则：</p> |
| <ul> |
| <li>"=>"之前的为消费者匹配条件，所有参数和消费者的URL进行对比，当消费者满足匹配条件时，对该消费者执行后面的过滤规则。</li> |
| <li>"=>"之后为提供者地址列表的过滤条件，所有参数和提供者的URL进行对比，消费者最终只拿到过滤后的地址列表。</li> |
| <li>如果匹配条件为空，表示对所有消费方应用，如：=> host != 10.20.153.11</li> |
| <li>如果过滤条件为空，表示禁止访问，如：host = 10.20.153.10 =></li> |
| </ul> |
| <p>表达式：</p> |
| <ul> |
| <li>参数支持：<ul> |
| <li>服务调用信息，如：method, argument 等 (暂不支持参数路由)</li> |
| <li>URL本身的字段，如：protocol, host, port 等</li> |
| <li>以及URL上的所有参数，如：application, organization 等</li> |
| </ul> |
| </li> |
| <li>条件支持：<ul> |
| <li>等号 <code>=</code> 表示"匹配"，如：host = 10.20.153.10</li> |
| <li>不等号 <code>!=</code> 表示"不匹配"，如：host != 10.20.153.10</li> |
| </ul> |
| </li> |
| <li>值支持：<ul> |
| <li>以逗号 <code>,</code> 分隔多个值，如：host != 10.20.153.10,10.20.153.11</li> |
| <li>以星号 <code>*</code> 结尾，表示通配，如：host != 10.20.*</li> |
| <li>以美元符 <code>$</code> 开头，表示引用消费者参数，如：host = $host</li> |
| </ul> |
| </li> |
| </ul> |
| <p>示例：</p> |
| <ol> |
| <li><p>排除预发布机：</p> |
| <pre><code> => host != 172.22.3.91 |
| </code></pre></li> |
| <li><p>白名单： |
| 注意：一个服务只能有一条白名单规则，否则两条规则交叉，就都被筛选掉了) </p> |
| <pre><code> host != 10.20.153.10,10.20.153.11 => |
| </code></pre></li> |
| <li><p>黑名单：</p> |
| <pre><code> host = 10.20.153.10,10.20.153.11 => |
| </code></pre></li> |
| <li><p>服务寄宿在应用上，只暴露一部分的机器，防止整个集群挂掉：</p> |
| <pre><code> => host = 172.22.3.1*,172.22.3.2* |
| </code></pre></li> |
| <li><p>为重要应用提供额外的机器：</p> |
| <pre><code> application != kylin => host != 172.22.3.95,172.22.3.96 |
| </code></pre></li> |
| <li><p>读写分离：</p> |
| <pre><code> method = find*,list*,get*,is* => host = 172.22.3.94,172.22.3.95,172.22.3.96 |
| method != find*,list*,get*,is* => host = 172.22.3.97,172.22.3.98 |
| </code></pre></li> |
| <li><p>前后台分离：</p> |
| <pre><code> application = bops => host = 172.22.3.91,172.22.3.92,172.22.3.93 |
| application != bops => host = 172.22.3.94,172.22.3.95,172.22.3.96 |
| </code></pre></li> |
| <li><p>隔离不同机房网段：</p> |
| <pre><code> host != 172.22.3.* => host != 172.22.3.* |
| </code></pre></li> |
| <li><p>提供者与消费者部署在同集群内，本机只访问本机的服务：</p> |
| <pre><code> => host = $host |
| </code></pre></li> |
| </ol> |
| <h4 id="脚本路由规则">脚本路由规则</h4> |
| <blockquote> |
| <p><img src="../sources/images/check.gif" alt="warning">支持JDK脚本引擎的所有脚本，比如：javascript, jruby, groovy 等，通过 type=javascript 参数设置脚本类型，缺省为javascript。</p> |
| <p><img src="../sources/images/warning-3.gif" alt="warning">脚本没有沙箱约束，可执行任意代码，存在后门风险</p> |
| </blockquote> |
| <pre><code>"script://0.0.0.0/com.foo.BarService?category=routers&dynamic=false&rule=" + URL.encode("function route(invokers) { ... } (invokers)") |
| </code></pre><p>基于脚本引擎的路由规则，如：</p> |
| <pre><code class="lang-javascript"><span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">route</span>(<span class="hljs-params">invokers</span>) </span>{ |
| <span class="hljs-keyword">var</span> result = <span class="hljs-keyword">new</span> java.util.ArrayList(invokers.size()); |
| <span class="hljs-keyword">for</span> (i = <span class="hljs-number">0</span>; i < invokers.size(); i ++) { |
| <span class="hljs-keyword">if</span> (<span class="hljs-string">"http://10.20.160.198/wiki/display/dubbo/10.20.153.10"</span>.equals(invokers.get(i).getUrl().getHost())) { |
| result.add(invokers.get(i)); |
| } |
| } |
| <span class="hljs-keyword">return</span> result; |
| } (invokers); <span class="hljs-comment">// 表示立即执行方法</span> |
| </code></pre> |
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