优化自定义负载均衡

zlt-commons/zlt-ribbon-spring-boot-starter/src/main/java/com/central/common/ribbon/LbIsolationAutoConfigure.java

 package com.central.common.ribbon;
 
+import com.alibaba.cloud.nacos.ribbon.NacosServer;
 import com.central.common.constant.ConfigConstants;
-import com.central.common.ribbon.config.RuleConfigure;
+import com.central.common.ribbon.rule.VersionIsolationRule;
+import com.netflix.loadbalancer.IRule;
+import org.springframework.boot.autoconfigure.AutoConfigureBefore;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
-import org.springframework.cloud.netflix.ribbon.RibbonClients;
+import org.springframework.cloud.netflix.ribbon.RibbonClientConfiguration;
+import org.springframework.context.annotation.Bean;
 
 /**
- * Ribbon扩展配置类
+ * 自定义负载均衡配置
  *
  * @author zlt
- * @date 2018/11/17 9:24
+ * @date 2019/9/3
+ * <p>
+ * Blog: https://blog.csdn.net/zlt2000
+ * Github: https://github.com/zlt2000
  */
 @ConditionalOnProperty(value = ConfigConstants.CONFIG_RIBBON_ISOLATION_ENABLED, havingValue = "true")
-@RibbonClients(defaultConfiguration = {RuleConfigure.class})
+@AutoConfigureBefore(RibbonClientConfiguration.class)
 public class LbIsolationAutoConfigure {
-
+    @Bean
+    @ConditionalOnClass(NacosServer.class)
+    @ConditionalOnMissingBean
+    public IRule versionIsolationRule() {
+        return new VersionIsolationRule();
+    }
 }

zlt-commons/zlt-ribbon-spring-boot-starter/src/main/java/com/central/common/ribbon/config/RuleConfigure.java

-package com.central.common.ribbon.config;
-
-import com.central.common.ribbon.rule.CustomIsolationRule;
-import com.netflix.loadbalancer.IRule;
-import org.springframework.context.annotation.Bean;
-
-/**
- * @author zlt
- * @date 2019/9/3
- */
-public class RuleConfigure {
-    @Bean
-    public IRule isolationRule() {
-        return new CustomIsolationRule();
-    }
-}

zlt-commons/zlt-ribbon-spring-boot-starter/src/main/java/com/central/common/ribbon/rule/CustomIsolationRule.java → zlt-commons/zlt-ribbon-spring-boot-starter/src/main/java/com/central/common/ribbon/rule/VersionIsolationRule.java

@@ -12,12 +12,21 @@ import java.util.List;
 import java.util.stream.Collectors;
 
 /**
- * 自定义隔离随机规则
+ * 根据实例版本号隔离规则
+ * 详细用法：https://mp.weixin.qq.com/s/9XQ-SIbYsov3KBx9TGFN0g
+ *
+ * 实例获取规则顺序如下(不满足则走下一个规则)：
+ * 1. 相同版本号的实例
+ * 2. 无版本号的实例
+ * 3. 所有实例中轮询
  *
  * @author zlt
  * @date 2019/9/3
+ * <p>
+ * Blog: https://blog.csdn.net/zlt2000
+ * Github: https://github.com/zlt2000
  */
-public class CustomIsolationRule extends RoundRobinRule {
+public class VersionIsolationRule extends RoundRobinRule {
     private final static String KEY_DEFAULT = "default";
     /**
      * 优先根据版本号取实例