自定义Ribbon规则--客户端写法

自定义Ribbon规则--客户端写法

• ​​代码结构​​

• ​​controller的代码​​

• ​​自定义配置文件​​
• ​​==自定义的规则==:​​

• ​​application.yml​​

• ​​效果如下:​​

代码结构

controller的代码

package com.demo.springcloud.controller;

import com.demo.springcloud.pojo.Dept;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.client.RestTemplate;

import java.util.List;

@RestController
public class DeptConsumerController {

    @Autowired
    private RestTemplate restTemplate;

//  private static final String REST_URI_PREFIX = "http://localhost:8001";
    private static final String REST_URI_PREFIX = "http://springcloud-provider-dept";


    @GetMapping("/consumer/dept/queryAll")
    public List<Dept> queryAll(){
        return restTemplate.getForObject(REST_URI_PREFIX+"/dept/queryAll", List.class);
    }

}

springcloud-provider-dep是服务提供者的id:

自定义配置文件

自定义的规则:

//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by FernFlower decompiler)
//
package com.demo.springcloud.myRule;
import com.netflix.client.config.IClientConfig;
import com.netflix.loadbalancer.AbstractLoadBalancerRule;
import com.netflix.loadbalancer.ILoadBalancer;
import com.netflix.loadbalancer.Server;
import java.util.List;

/**
 * 自定义的规则:
 * 每个服务走5次，然后才切换到另一个服务上
 */
public class HflRandomRule extends AbstractLoadBalancerRule {

    private int total;
    private int curentIndex;
    public HflRandomRule() {
    }

//    @SuppressWarnings({"RCN_REDUNDANT_NULLCHECK_OF_NULL_VALUE"})
    public Server choose(ILoadBalancer lb, Object key) {
        if (lb == null) {
            return null;
        } else {
            Server server = null;

            while(server == null) {
                if (Thread.interrupted()) {
                    return null;
                }

                List<Server> upList = lb.getReachableServers();
                List<Server> allList = lb.getAllServers();
                int serverCount = allList.size();
                if (serverCount == 0) {
                    return null;
                }

                if(total<5){
                    server = upList.get(curentIndex);
                }else{
                    total = 0;
                    curentIndex ++;
                    if(curentIndex > upList.size()){
                        curentIndex = 0;
                    }
                    server = upList.get(curentIndex);
                }
                total++;



                if (server == null) {
                    Thread.yield();
                } else {
                    if (server.isAlive()) {
                        return server;
                    }

                    server = null;
                    Thread.yield();
                }
            }

            return server;
        }
    }


    public Server choose(Object key) {
        return this.choose(this.getLoadBalancer(), key);
    }

    public void initWithNiwsConfig(IClientConfig clientConfig) {
    }
}

application.yml

效果如下:

完