java-访问内部微服务

2019-11-11 05:23:51 阅读：192 来源： 互联网

标签：netflix-eureka spring-boot netflix-ribbon spring java

我有两个带有eureka作为服务注册表的微服务,现在我试图从另一个调用微服务,使用功能区解析端点以实现客户端负载平衡.

服务A：

此服务公开了一个端点http：// localhost：15000 / api / user / {userId},application.yml如下所示,

# Spring properties
spring:
  application:
    name: user_microservice
  cloud:
    config:
      discovery:
        enabled: false

# HTTP Server
server:
  port: 15000  # HTTP (Tomcat) port



# Discovery Server Access
eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/
  instance:
    instanceId: ${spring.application.name}:${random.int}
    metadataMap:
      instanceId: ${spring.application.name}:${random.int}

logging:
  level:
    com.netflix.discovery: 'OFF'
    org.springframework.cloud: 'DEBUG'

调用服务A的服务B具有以下应用程序类：

@EnableDiscoveryClient
@SpringBootApplication
public class UserSummaryApplication {

    public static void main(String[] args) {

        SpringApplication.run(UserSummaryApplication.class, args);
    }

    @Bean(name = "restTemplate")
    RestTemplate restTemplate() {
        return new RestTemplate();
    }

    @Bean(name = "loadBalancedRestTemplate")
    @LoadBalanced
    RestTemplate loadBalancedRestTemplate() {
        return new RestTemplate();
    }
}

控制者

@RestController
@RequestMapping("/api/usersummary")
public class UserSummaryController {

    @Autowired
    private UserSummaryService userSummaryService;

    @RequestMapping(value="/{userId}", method= RequestMethod.GET)
    @ResponseStatus(HttpStatus.OK)
    public UserSummary getUserSummary(@PathVariable String userId){
        return userSummaryService.getUserSummary(userId);
    }
}

服务

@Service
public class UserSummaryService {

    // Uses Ribbon to load balance requests
    private RestTemplate loadBalancedRestTemplate;

    public UserSummary getUserSummary(String UserId){

        String url = String.format("http://%s%s","user_microservice","/api/user/{userId}");
        logger.info(url);
        try {
            return this.loadBalancedRestTemplate.getForObject(url,
                    User.class, UserId).toString();

        }catch (Exception e){
            e.printStackTrace();
            return null;
        }

    }

    @Autowired
    public void setLoadBalancedRestTemplate(RestTemplate loadBalancedRestTemplate) {
        this.loadBalancedRestTemplate = loadBalancedRestTemplate;
    }

}

但是在尝试访问该服务时出现异常：

java.lang.IllegalStateException: Request URI does not contain a valid hostname: http://user_microservice/api/user/599f877c8e365c0001cec8d1
usersummary_microservice_1  |   at org.springframework.util.Assert.state(Assert.java:70)
usersummary_microservice_1  |   at org.springframework.cloud.client.loadbalancer.LoadBalancerInterceptor.intercept(LoadBalancerInterceptor.java:54)
usersummary_microservice_1  |   at org.springframework.http.client.InterceptingClientHttpRequest$InterceptingRequestExecution.execute(InterceptingClientHttpRequest.java:86)
usersummary_microservice_1  |   at org.springframework.http.client.InterceptingClientHttpRequest.executeInternal(InterceptingClientHttpRequest.java:70)
usersummary_microservice_1  |   at org.springframework.http.client.AbstractBufferingClientHttpRequest.executeInternal(AbstractBufferingClientHttpRequest.java:48)
usersummary_microservice_1  |   at org.springframework.http.client.AbstractClientHttpRequest.execute(AbstractClientHttpRequest.java:53)
usersummary_microservice_1  |   at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:652)
usersummary_microservice_1  |   at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:613)
usersummary_microservice_1  |   at org.springframework.web.client.RestTemplate.getForObject(RestTemplate.java:287)
usersummary_microservice_1  |   at com.haulmatic.usersummary.service.userSummaryService.getuserSummary(UserSummaryService.java:33)
usersummary_microservice_1  |   at com.haulmatic.usersummary.controller.userSummaryController.getuserSummary(UserSummaryController.java:29)
usersummary_microservice_1  |   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
usersummary_microservice_1  |   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
usersummary_microservice_1  |   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
usersummary_microservice_1  |   at java.lang.reflect.Method.invoke(Method.java:498)
usersummary_microservice_1  |   at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
usersummary_microservice_1  |   at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
usersummary_microservice_1  |   at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)
usersummary_microservice_1  |   at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
usersummary_microservice_1  |   at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
usersummary_microservice_1  |   at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
usersummary_microservice_1  |   at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)
usersummary_microservice_1  |   at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)
usersummary_microservice_1  |   at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
usersummary_microservice_1  |   at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
usersummary_microservice_1  |   at javax.servlet.http.HttpServlet.service(HttpServlet.java:635)
usersummary_microservice_1  |   at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
usersummary_microservice_1  |   at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
usersummary_microservice_1  |   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
usersummary_microservice_1  |   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
usersummary_microservice_1  |   at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
usersummary_microservice_1  |   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
usersummary_microservice_1  |   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
usersummary_microservice_1  |   at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
usersummary_microservice_1  |   at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
usersummary_microservice_1  |   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
usersummary_microservice_1  |   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
usersummary_microservice_1  |   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
usersummary_microservice_1  |   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
usersummary_microservice_1  |   at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478)
usersummary_microservice_1  |   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
usersummary_microservice_1  |   at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80)
usersummary_microservice_1  |   at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
usersummary_microservice_1  |   at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
usersummary_microservice_1  |   at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:799)
usersummary_microservice_1  |   at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
usersummary_microservice_1  |   at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)
usersummary_microservice_1  |   at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1455)
usersummary_microservice_1  |   at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
usersummary_microservice_1  |   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
usersummary_microservice_1  |   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
usersummary_microservice_1  |   at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
usersummary_microservice_1  |   at java.lang.Thread.run(Thread.java:748)

关于这个有什么建议吗？

解决方法:

主机名中的下划线(_)无效.用破折号(-)命名您的服务.

new URI("http://user_microservice/stuff").getHost() // null
new URI("http://user-microservice/stuff").getHost() // user-microservice

因此,将spring.application.name更改为user-microservice并更改客户端中的URL.

标签：netflix-eureka,spring-boot,netflix-ribbon,spring,java
来源： https://codeday.me/bug/20191111/2016729.html

本站声明： 1. iCode9 技术分享网（下文简称本站）提供的所有内容，仅供技术学习、探讨和分享；
2. 关于本站的所有留言、评论、转载及引用，纯属内容发起人的个人观点，与本站观点和立场无关；
3. 关于本站的所有言论和文字，纯属内容发起人的个人观点，与本站观点和立场无关；
4. 本站文章均是网友提供，不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属；如您发现该文章侵犯了您的权益，可联系我们第一时间进行删除；
5. 本站为非盈利性的个人网站，所有内容不会用来进行牟利，也不会利用任何形式的广告来间接获益，纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。

ICode9

java-访问内部微服务