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@ -1,15 +1,20 @@ |
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package com.gitee.sop.gatewaycommon.zuul.loadbalancer; |
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import com.gitee.sop.gatewaycommon.bean.SpringContext; |
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import com.gitee.sop.gatewaycommon.manager.EnvGrayManager; |
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import com.google.common.base.Optional; |
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import com.netflix.loadbalancer.ILoadBalancer; |
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import com.netflix.loadbalancer.Server; |
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import com.netflix.loadbalancer.ZoneAvoidanceRule; |
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import com.netflix.zuul.context.RequestContext; |
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import lombok.extern.slf4j.Slf4j; |
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import org.apache.commons.lang.ArrayUtils; |
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import org.springframework.core.env.Environment; |
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import org.springframework.util.StringUtils; |
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import javax.servlet.http.HttpServletRequest; |
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import java.util.ArrayList; |
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import java.util.List; |
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import java.util.stream.Collectors; |
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/** |
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* 服务实例选择器 |
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@ -47,26 +52,64 @@ public abstract class BaseServerChooser extends ZoneAvoidanceRule { |
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public Server choose(Object key) { |
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ILoadBalancer lb = getLoadBalancer(); |
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// 获取服务实例列表
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List<Server> allServers = lb.getAllServers(); |
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HttpServletRequest request = RequestContext.getCurrentContext().getRequest(); |
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List<Server> servers = lb.getReachableServers(); |
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RequestContext currentContext = RequestContext.getCurrentContext(); |
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// 存放预发服务器
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List<Server> preServers = new ArrayList<>(4); |
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// 存放灰度发布服务器
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List<Server> grayServers = new ArrayList<>(4); |
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// 存放非预发服务器
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List<Server> notPreServers = new ArrayList<>(4); |
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List<Server> preServers = allServers.stream() |
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.filter(this::isPreServer) |
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.filter(server -> canVisitPre(server, request)) |
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.collect(Collectors.toList()); |
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for (Server server : servers) { |
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// 是否开启了预发模式
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if (this.isPreServer(server)) { |
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preServers.add(server); |
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} else if (this.isGrayServer(server)) { |
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grayServers.add(server); |
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} else { |
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notPreServers.add(server); |
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} |
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} |
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notPreServers.addAll(grayServers); |
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// 如果没有开启预发布服务和灰度发布，直接用默认的方式
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if (preServers.isEmpty() && grayServers.isEmpty()) { |
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return super.choose(key); |
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} |
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// 如果是从预发布域名访问过来，则认为是预发布请求
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if (this.isRequestFromPreDomain(currentContext.getRequest())) { |
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return doChoose(preServers, key); |
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} |
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// 如果是灰度请求
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if (this.isRequestGrayServer(currentContext)) { |
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return doChoose(grayServers, key); |
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} |
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if (!preServers.isEmpty()) { |
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return this.doChoose(preServers, key); |
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// 到这里说明不能访问预发/灰度服务器，则需要路由到非预发服务器
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return doChoose(notPreServers, key); |
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} |
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List<Server> grayServers = allServers.stream() |
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.filter(this::isGrayServer) |
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.collect(Collectors.toList()); |
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if (!grayServers.isEmpty()) { |
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return doChoose(grayServers, key); |
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/** |
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* 通过判断hostname来确定是否是预发布请求 |
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* |
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* @param t t |
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* @return 返回true：可以进入到预发环境 |
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*/ |
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protected boolean isRequestFromPreDomain(HttpServletRequest t) { |
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String domain = SpringContext.getBean(Environment.class).getProperty("pre.domain"); |
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if (StringUtils.isEmpty(domain)) { |
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return false; |
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} |
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String[] domains = domain.split("\\,"); |
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return ArrayUtils.contains(domains, getHost(t)); |
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} |
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return super.choose(key); |
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protected boolean isRequestGrayServer(RequestContext t) { |
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return t.get(EnvGrayManager.ENV_GRAY) != null; |
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} |
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protected String getHost(HttpServletRequest t) { |
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return t.getServerName(); |
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} |
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protected Server doChoose(List<Server> servers, Object key) { |
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tanghc
5 years ago