SpringCloud,eureka,ribbon,feign的使用

eureka高可用相互注册

 

服务者

修改pom文件


		
			org.springframework.cloud
			spring-cloud-starter-eureka-server
			1.4.3.RELEASE
		
		
			org.springframework.boot
			spring-boot-starter-security
		
	

配置文件

server.port=10000
#应为当前的eureka是单机的,所以我们需要做一些配置
eureka.client.register-with-eureka=false
eureka.client.fetch-registry=false

eureka.client.service-url.defaultZone=http://user:123@localhost:10000/eureka
#开启安全配置,也就是需要密码,如果不需要设置false即可,注意这个参数必须放在application文件中
security.basic.enabled=true
security.user.name=user
#在配置了用户和密码,我们可以修改地址访问风格为curl风格
security.user.password=123

eureka.instance.prefer-ip-address=true

启动类

@SpringBootApplication
@EnableEurekaServer
public class EurekaApp {

	public static void main(String[] args) {
		SpringApplication.run(EurekaApp.class, args);
	}

}

提供者,

修改pom文件


			org.springframework.cloud
			spring-cloud-starter-netflix-eureka-client
			1.4.3.RELEASE
		
		
			org.springframework.boot
			spring-boot-starter-actuator
		

修改配置文件

server.port=7900
spring.application.name=provider-user
eureka.client.serviceUrl.defaultZone=http://user:123@localhost:10000/eureka

eureka.instance.prefer-ip-address=true

写一个controller

@RestController
public class UserController {

	@GetMapping("/user/{id}")
	public User getinfo(@PathVariable Long id) {
		return new User(id);
	}
	@PostMapping("/user2")
	public User getinfo(User user) {
		return user;
	}
}

启动类

@SpringBootApplication
@EnableEurekaClient
public class UserApp {

	public static void main(String[] args) {
		SpringApplication.run(UserApp.class, args);
	}

}

 

 

消费者

ribbon

修改pm文件


			org.springframework.cloud
			spring-cloud-starter-netflix-eureka-client
			1.4.3.RELEASE
		
		
			org.springframework.boot
			spring-boot-starter-actuator
		

修改配置文件
 

server.port=8900
spring.application.name=sp-orders

user.url=http://localhost:7900/user/

eureka.client.serviceUrl.defaultZone=http://user:123@localhost:10000/eureka

eureka.instance.prefer-ip-address=true

controller

@RestController
public class OrderController {
	
	@Autowired
	private EurekaClient eurekaClient;
	@Autowired
	private RestTemplate restTemplate;
	@Autowired
	private LoadBalancerClient loadBalancerClient;
	//String url="http://localhost:7900/user/";
	@Value("${user.url}")
	private String url;
	
	@GetMapping("/order/{id}")
	public  User getOrder(@PathVariable Long id) {
		InstanceInfo inst = eurekaClient.getNextServerFromEureka("PROVIDER-USER", false);
		url=inst.getHomePageUrl();
		System.out.println("URL:"+url);
		User user= restTemplate.getForObject(url+"/user/"+id, User.class);
		return user;
	}
	@GetMapping("/order2/{id}")
	public  User getOrder2(@PathVariable Long id) {
		System.out.println("getOrder2..........");
		User user= restTemplate.getForObject("http://PROVIDER-USER/user/"+id, User.class);
		return user;
	}
	
	@GetMapping("/test")
	public String test() {
		ServiceInstance serviceInstance = loadBalancerClient.choose("SP-USERS");
		System.out.println("ok:"+serviceInstance.getServiceId()
							+":"+serviceInstance.getHost()+":"+serviceInstance.getPort());
		return "ok";
	}
	
	
	
	
}

ribbon配置类,负载均衡

@Configuration
@ExculdeCommentScan
public class TestConfig {

	@Autowired
	private IClientConfig clientConfig;
	public IRule ribbonRule(IClientConfig clientConfig) {
		return new RandomRule();
	}
}

注释类


public @interface ExculdeCommentScan {

}

启动类
 

@SpringBootApplication
@EnableEurekaClient
@RibbonClient(name="PROVIDER-USER",configuration = TestConfig.class)
@ComponentScan(excludeFilters = {@ComponentScan.Filter(type = FilterType.ANNOTATION,value = ExculdeCommentScan.class)})
public class App {

    @Bean
    public RestTemplate getTemp() {
        return new RestTemplate();
    }
    public static void main(String[] args) {
        SpringApplication.run(App.class, args);
    }

}

feign

修改POM文件


			org.springframework.cloud
			spring-cloud-starter-netflix-eureka-client
			1.4.3.RELEASE
		
		
			org.springframework.boot
			spring-boot-starter-actuator
		
		
			org.springframework.cloud
			spring-cloud-starter-openfeign
			1.4.3.RELEASE
		

配置文件

server.port=8900
spring.application.name=order-feign


eureka.client.serviceUrl.defaultZone=http://user:123@localhost:10000/eureka

eureka.instance.prefer-ip-address=true

logging.level.com.ljw.feign.client.MyFeighClient2=debug

controller

@RestController
public class OrderController {
	@Autowired
	private MyFeighClient myFeignClient;
	@Autowired
	private MyFeighClient2 myFeighClient2;
	@GetMapping("/order/{id}")
	public User getUser(@PathVariable Long id) {
		System.out.println("...............");
		User user = myFeignClient.getUser(id);
		System.out.println("+++++++++++++++");
		return user;
	}
	@GetMapping("/order2")
	public User getUser(User user) {
		System.out.println("...............");
		User user1 = myFeignClient.getUser2(user);
		System.out.println("+++++++++++++++");
		return user1;
	}
	@RequestMapping("/info/{name}")
	public String getServiceInfo(@PathVariable String name) {
		System.out.println("services info............");
		return myFeighClient2.getServiceInfo(name);
	}
}

feignclient


@FeignClient("PROVIDER-USER")
public interface MyFeighClient {
	
	@RequestMapping(value = "/user/{id}",method = RequestMethod.GET)
	User getUser(@PathVariable(value="id") Long id);
	
	/**
	 * 无法方位提供者那边必须是post方式这边才可以,如果非要使用get传多个参数,只能以普通方式传递,不能封装为复杂对象
	 * 如果你传递的是复杂参数,那么feign不管配置是什么请求方式,都会以post方式发出
	 * @param user
	 * @return
	 */
	@RequestMapping(value = "/user2",method = RequestMethod.POST)
	User getUser2(User user);
}
@FeignClient(name="PROVIDER-USER",url = "http://localhost:10000",configuration = FeignConfig.class)
public interface MyFeighClient2 {
	
	@RequestMapping(value = "/eureka/apps/{servicename}",method = RequestMethod.GET)
	String getServiceInfo(@PathVariable(value="servicename") String servicename);
	
}

feignConfig


@Configuration
public class FeignConfig {

	/**
	 * 创建用户和密码对象
	 * @return
	 */
	@Bean
	public BasicAuthRequestInterceptor authRequestInterceptor() {
		return new BasicAuthRequestInterceptor("user","123");
	}
	
	/*
	 * 配置输出日志是那些,必须在debug模式下才可以输出
	 */
	@Bean
	Logger.Level feignloggerlevel(){
		return Logger.Level.FULL;
	}
}

启动类

@SpringBootApplication
@EnableEurekaClient
@EnableFeignClients
public class FeignApp {

	public static void main(String[] args) {
		SpringApplication.run(FeignApp.class, args);
	}

}

 

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