springcloud H版+alibaba cloud 1
springcloud H版+alibaba cloud 1
- 1，springcloud服务更新
- 2，搭建基础框架springcloud
- 3，父工程pom的创建
- 4，开启热部署
- 5，聚合工程重构（common公共类）
- 6，eureka server
1，springcloud服务更新
服务注册中心：eureka
由zookeeper，Consul，Nacos（重点）
服务调用：ribbon
loadBalancer可能后面会替代ribbon
服务调用2：feign
由openFeign替代
服务降级：Hystrix
国内经常使用。国外已经在使用resilience4j
国内用alibaba sentienl替代
网关：zuul
gateway替代
配置中心：config
由Nacos替代
消息总线：bus
由Nacos替代
所以Nacos是重点之中的重点
2，搭建基础框架springcloud
1，创建一个总的父工程。springcloud，project
设置编码utf-8
然后设置注解生效
选择java8
文件type过滤
3，父工程pom的创建
如果一个项目的pom.xml文件里有< dependenciesmanager>那么一定是父工程
父项目中指定了版本号。子项目中就可以不用指定版本号了。。。
创建子工程时。直接创建maven项目
1，创建payment provider项目
粘贴父项目的pom.xml
application.yml
数据库db2019
payment的创建
创建payment提供者。写好增删改查。。。。
4，开启热部署
开启自动热部署功能
1，
2，这个放父工程，finalName可写可不写
3，
4，
5，重启idea完成热部署
###热部署只能在开发环境下使用
order只能有controller。客户端这块
拷贝provider的entity
6，restTemplete的。。。服务调用
创建一个config类
controller实现客户端调用provider 写操作
读操作
如果插入数据库只有主键没有内容。处理如下
在消费者这边和生产者这边加上@requestbody注解
5，聚合工程重构（common公共类）
上一节。。服务调用者和服务提供者。。。entity重复了。我们要将它们重构
创建一个公共类
cloud-api-commons
pom.xml
把entity粘贴过来
然后clean，install
然后再改造80和8001
删除掉entity
然后分别引入坐标
如果最后出现包扫描有问题
请在两个启动类上加注解
@mapperscan(“com.atguigu.springcloud.dao”)
@ComponentScan(“com.atguigu.springcloud.*”)
6，eureka server
1,pom.xml
org.springframework.cloud
spring-cloud-starter-netflix-eureka-server
2，application.yml
server:
port: 7001
eureka:
instance:
hostname: eureka7001.com #eureka服务端的实例名称
client:
#false表示不向注册中心注册自己
register-with-eureka: false
#false表示自己端就是注册中心，我的职责就是维护服务实例，并不需要去检索服务
fetch-registry: false
service-url:
#设置与Eureka Server交互的地址查询服务和注册服务都需要依赖这个地址
#defaultZone: http://eureka7002.com:7002/eureka/ #互相注册
defaultZone: http://eureka7001.com:7001/eureka/ #单机模式
#server:
#关闭自我保护机制，保证不可用服务被及时剔除
#enable-self-preservation: false
#eviction-interval-timer-in-ms: 2000
3，主启动
package com.atguigu.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
@SpringBootApplication
@EnableEurekaServer
public class EurekaMain7001 {
public static void main(String[] args) {
SpringApplication.run(EurekaMain7001.class,args);
}
}
8001和80整合eureka
创建微服务提供者8001和微服务消费者80
pom
yml
8001
server:
port: 8001
spring:
application:
name: cloud-provider-service
datasource:
type: com.alibaba.druid.pool.DruidDataSource #当前数据源操作类型
driver-class-name: org.gjt.mm.mysql.Driver #mysql驱动包
url: jdbc:mysql://localhost:3306/db2019?useUnicode=true&characterEncoding=utf-8&useSSL=false
username: root
password: ljs
eureka:
client:
#表示是否将自己注册进EurekaServer默认为true
register-with-eureka: true
#是否从EurekaServer抓取已有的注册信息，默认为true。单节点无所谓，集群必须设置为true才能配合ribbon使用负载均衡
fetch-registry: true
service-url:
defaultZone: http://localhost:7001/eureka #单机版
#defaultZone: http://eureka7001.com:7001/eureka,http://eureka7002.com:7002/eureka #集群版
instance:
instance-id: payment8001
prefer-ip-address: true #访问路径可以显示IP地址
#Eureka客户端向服务端发送心跳的时间间隔，单位为秒（默认是30秒）
#lease-renewal-interval-in-seconds: 1
#Eurekaf服务端在收到最后一次心跳后等待时间上限，单位为秒（默认是90秒），超时将剔除服务
#lease-expiration-duration-in-seconds: 2
mybatis:
mapper-locations: classpath:mapper/*.xml
type-aliases-package: com.atguigu.springcloud.entities #所有Entity别名类所在包
dao
package com.atguigu.springcloud.dao;
import com.atguigu.springcloud.entities.Payment;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
@Mapper
public interface PaymentDao {
int create(Payment payment);
Payment getPaymentById(@Param("id") Long id);
}
dao.xml
insert into payment(serial) values(#{serial})
service
package com.atguigu.springcloud.service;
import com.atguigu.springcloud.entities.Payment;
import org.apache.ibatis.annotations.Param;
public interface PaymentService {
public int create(Payment payment);
public Payment getPaymentById(@Param("id") Long id);
}
serviceImpl
package com.atguigu.springcloud.service;
import com.atguigu.springcloud.dao.PaymentDao;
import com.atguigu.springcloud.entities.Payment;
import org.springframework.stereotype.Service;
import javax.annotation.Resource;
@Service
public class PaymentServiceImpl implements PaymentService{
@Resource
private PaymentDao paymentDao;
public int create(Payment payment){
return paymentDao.create(payment);
}
public Payment getPaymentById(Long id){
return paymentDao.getPaymentById(id);
}
}
controller
package com.atguigu.springcloud.controller;
import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import com.atguigu.springcloud.service.PaymentService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.*;
import javax.annotation.Resource;
import javax.xml.soap.SAAJResult;
import java.util.List;
import java.util.concurrent.TimeUnit;
@RestController
@Slf4j
public class PaymentController {
@Resource
private PaymentService paymentService;
@Value("${server.port}")
private String serverPort;
@Resource
private DiscoveryClient discoveryClient;
@GetMapping(value = "/payment/discovery")
public Object discovery(){
List services = discoveryClient.getServices(); //得到所有的微服务
for (String element : services) {
log.info("*****element:"+element);
}
List instances = discoveryClient.getInstances("CLOUD-PROVIDER-SERVICE"); //得到一个具体微服务的所有实例
for (ServiceInstance instance : instances){
log.info(instance.getServiceId()+"\t"+instance.getHost()+"\t"+instance.getPort()+"\t"+instance.getUri());
}
return this.discoveryClient;
}
//只传给前端CommonResult，不需要前端了解其他的组件
@PostMapping(value = "/payment/create")
public CommonResult create(@RequestBody Payment payment){
int result = paymentService.create(payment);
log.info("*****插入结果："+result);
if(result > 0){
return new CommonResult(200,"插入数据成功,serverPort："+serverPort,result);
}else{
return new CommonResult(444,"插入数据失败",null);
}
}
@GetMapping(value = "/payment/get/{id}")
public CommonResult getPaymentById(@PathVariable("id") Long id){
Payment payment = paymentService.getPaymentById(id);
log.info("*****插入结果："+payment);
if(payment != null){
return new CommonResult(200,"查询成功,serverPort："+serverPort,payment);
}else{
return new CommonResult(444,"没有对应记录,查询ID："+id,null);
}
}
@GetMapping(value = "/payment/lb")
public String getPaymentLB(){
return serverPort;
}
@GetMapping(value = "/payment/feign/timeout")
public String paymentFeignTimeout(){
//暂停几秒钟线程
try{
TimeUnit.SECONDS.sleep(3);
}catch (InterruptedException e){
e.printStackTrace();
}
return serverPort;
}
@GetMapping("/payment/zipkin")
public String paymentZipkin(){
return "hi, i'am paymentzipkin server fall back,welcome to atguigu, O(∩_∩)O哈哈~";
}
}
80
server:
port: 80
spring:
application:
name: cloud-order-server
eureka:
client:
#表示是否将自己注册进EurekaServer默认为true
register-with-eureka: true
fetch-registry: true
service-url:
defaultZone: http://localhost:7001/eureka
#defaultZone: http://eureka7001.com:7001/eureka,http://eureka7002.com:7002/eureka #集群版
服务名指定
启动类加注解
@SpringBootApplication
@EnableEurekaClient
mySelfRule
package com.atguigu.myrule;
import com.netflix.loadbalancer.IRule;
import com.netflix.loadbalancer.RandomRule;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
/**
* 自定义负载均衡规则类
* @author wsk
* @date 2020/3/13 14:56
*/
@Configuration
public class MySelfRule {
@Bean
public IRule myRule(){
return new RandomRule();
}
}
config
package com.atguigu.springcloud.config;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;
@Configuration
public class ApplicationContextConfig {
@Bean
//@LoadBalanced //使用@LoadBalanced注解赋予RestTemplate负载均衡的能力
public RestTemplate getRestTemplate(){
return new RestTemplate();
}
}
lb
package com.atguigu.springcloud.lb;
import org.springframework.cloud.client.ServiceInstance;
import java.util.List;
/**
* 模拟 ILoadBalancer 的接口，选择哪一个负载算法和机器
* @author wsk
* @date 2020/3/13 17:11
*/
public interface LoadBalancer {
//获取eureka上的活着的机器总数
ServiceInstance instances(List serviceInstanceList);
}
package com.atguigu.springcloud.lb;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.stereotype.Component;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
/**
* Ribbon 手写轮询算法
* @author wsk
* @date 2020/3/13 17:16
*/
@Component
public class MyLB implements LoadBalancer {
//原子类
private AtomicInteger atomicInteger = new AtomicInteger(0);
public final int getAndIncrement(){
int current;
int next;
do{
current = this.atomicInteger.get();
//超过最大值，为0，重新计数 2147483647 Integer.MAX_VALUE，不直接写方法是因为方法运行时每次都会创建一个栈区，而写死就不会，涉及Jvm调优
next = current >= 2147483647 ? 0 : current + 1;
//自旋锁
}while (!this.atomicInteger.compareAndSet(current,next));
System.out.println("*****第几次访问，次数next："+next);
return next;
}
@Override
public ServiceInstance instances(List serviceInstance) {
int index = getAndIncrement() % serviceInstance.size();
return serviceInstance.get(index);
}
}
controller
package com.atguigu.springcloud.controller;
import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import com.atguigu.springcloud.lb.LoadBalancer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;
import javax.annotation.Resource;
import java.net.URI;
import java.util.List;
@RestController
@Slf4j
public class OrderController {
//private static final String PAYMENT_URL="http://localhost:8001";
//通过在eureka上注册过的微服务名称调用
private static final String PAYMENT_URL = "http://CLOUD-PROVIDER-SERVICE";
@Resource
private RestTemplate restTemplate;
/**
* 自定义负载均衡规则
*/
@Resource
private LoadBalancer loadBalancer;
@Resource
private DiscoveryClient discoveryClient;
@GetMapping("/consumer/payment/create")
public CommonResult create(Payment payment){
return restTemplate.postForObject(PAYMENT_URL+"/payment/create",payment,CommonResult.class);
}
@GetMapping("/consumer/payment/get/{id}")
public CommonResult getPayment(@PathVariable("id") Long id){
return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
}
@GetMapping("/consumer/payment/getForEntity/{id}")
public CommonResult getPayment2(@PathVariable("id") Long id){
ResponseEntity entity = restTemplate.getForEntity(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
if(entity.getStatusCode().is2xxSuccessful()){
return entity.getBody();
}else{
return new CommonResult(444,"操作失败");
}
}
/**
* 路由规则：轮询
* @param
* @return
*/
@GetMapping(value = "/consumer/payment/lb")
public String getPaymentLB(){
List instances = discoveryClient.getInstances("CLOUD-PROVIDER-SERVICE");
if(instances == null || instances.size() <= 0){
return null;
}
ServiceInstance serviceInstance = loadBalancer.instances(instances);
URI uri = serviceInstance.getUri();
return restTemplate.getForObject(uri+"/payment/lb",String.class);
}
//============> zipkin + sleuth
@GetMapping("/consumer/payment/zipkin")
public String paymentZipkin(){
String result = restTemplate.getForObject("http://localhost:8001" + "/payment/zipkin", String.class);
return result;
}
}
eureka 集群
做集群修改window10配置文件
会出现相互注册的情况
