package com.my.blogcenter.configuration;

import com.alibaba.nacos.api.exception.NacosException;
import com.alibaba.nacos.api.naming.NamingService;
import com.alibaba.nacos.api.naming.pojo.Instance;
import com.netflix.client.config.IClientConfig;
import com.netflix.loadbalancer.AbstractLoadBalancerRule;
import com.netflix.loadbalancer.BaseLoadBalancer;
import com.netflix.loadbalancer.Server;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.alibaba.nacos.NacosDiscoveryProperties;
import org.springframework.cloud.alibaba.nacos.ribbon.NacosServer;

/**
 * @author carrymec@126.com
 * @desc 基于权重选择服务节点
 * @date 2020-03-07
 */
@Slf4j
public class NacosWeightRule extends AbstractLoadBalancerRule {
    @Autowired
    private NacosDiscoveryProperties discoveryProperties;

    @Override
    public void initWithNiwsConfig(IClientConfig iClientConfig) {

    }

    @Override
    public Server choose(Object key) {
        try {
            BaseLoadBalancer loadBalancer = (BaseLoadBalancer) this.getLoadBalancer();
            log.info("loadBalancer->{}", loadBalancer);
            //获取请求微服务的名称
            String name = loadBalancer.getName();
            //拿到服务发现的相关api
            NamingService namingService = discoveryProperties.namingServiceInstance();
            Instance instance = namingService.selectOneHealthyInstance(name);
            log.info("port:{},ClusterName:{}", instance.getPort(), instance.getClusterName());
            return new NacosServer(instance);
        } catch (NacosException e) {
            e.printStackTrace();
        }
        return null;
    }
}