resttemplate

springcloud入门

由 自作多情 提交于 2019-12-21 20:06:53
SpringCloud简介 　　以下来自 百度百科 ：Spring Cloud是一系列框架的有序集合。它利用Spring Boot的开发便利性巧妙地简化了分布式系统基础设施的开发，如 服务发现注册、 配置中心、消息总线、 负载均衡 、断路器、数据监控等，都可以用Spring Boot的开发风格做到一键启动和部署。Spring Cloud并没有重复制造轮子，它只是将目前各家公司开发的比较成熟、经得起实际考验的服务框架组合起来，通过Spring Boot风格进行再封装屏蔽掉了复杂的配置和实现原理，最终给开发者留出了一套简单易懂、易部署和易维护的分布式系统开发工具包。 　　主要分为以下五个部分， 本次主要讲解 服务的发现与注册—Eureka与客户端负载均衡—Ribbon，再通过搭建工程来展示。 服务发现与注册——Netflix Eureka 客服端负载均衡——Netflix Ribbon 断路器——Netflix Hystrix 服务网关——Netflix Zuul 分布式配置——Spring Cloud Config 　　 下面我先简要的对Eureka即Ribbon做一个介绍，具体的代码以及配置文件在后面的案例中再来展示 一、Eureka注册中心——Eureka Server 　　在我们现在的前后端分离架构中，服务层被拆分成了很多的微服务

What is the right way to implement sync and async methods in a library?

由 ╄→尐↘猪︶ㄣ 提交于 2019-12-21 13:40:21
问题 I need to make a library in which I will have synchronous and asynchronous feature. executeSynchronous() - waits until I have a result, returns the result. executeAsynchronous() - returns a Future immediately which can be processed after other things are done, if needed. Core Logic of my Library The customer will use our library and they will call it by passing DataKey builder object. We will then construct a URL by using that DataKey object and make a HTTP client call to that URL by

RestTemplate uriVariables not expanded

由 我的梦境 提交于 2019-12-21 06:54:46
问题 I try to access a rest endpoint by using springs RestTemplate.getForObject() but my uri variables are not expanded, and attached as parameters to the url. This is what I got so far: Map<String, String> uriParams = new HashMap<String, String>(); uriParams.put("method", "login"); uriParams.put("input_type", DATA_TYPE); uriParams.put("response_type", DATA_TYPE); uriParams.put("rest_data", rest_data.toString()); String responseString = template.getForObject(endpointUrl, String.class, uriParams);

Spring boot testing of a rest client using @RestClientTest

由 China☆狼群 提交于 2019-12-21 04:12:42
问题 I am using spring boot 1.5.8 and want to test my client: @Component public class RestClientBean implements RestClient { private Map<String, RestTemplate> restTemplates = new HashMap<>(); @Autowired public RestClientBean(RestTemplateBuilder builder, SomeConfig conf) { restTemplates.put("first", builder.rootUri("first").build(); restTemplates.put("second", builder.rootUri("second").build(); } } with the following test: @RunWith(SpringRunner.class) @RestClientTest(RestClient.class) public class

CustomDeserializer has no default (no arg) constructor

由 筅森魡賤 提交于 2019-12-21 03:59:33
问题 I am consuming a REST Api with RestTemplate. The response I'm getting from the API has lots of nested objects. Here's a little snippet as an example: "formularios": [ { "form_data_id": "123006", "form_data": { "form_data_id": "123006", "form_id": "111", "efs": { "1": {}, "2": "{\"t\":\"c\",\"st\":\"m\",\"v\":[{\"id\":\"3675\",\"l\":\"a) Just an example\",\"v\":\"1\"},{\"id\":\"3676\",\"l\":\"b) Another example.\",\"v\":\"2\"}]}" } } The problem I'm having is that most of the times the "1"

如何在客户端实现服务的负载均衡

由 馋奶兔 提交于 2019-12-20 19:44:36
思考一个问题：如果为同一个提供者在Eureka中注册多个服务？客户端应该如何选择服务呢？ 这时，就需要在客户端实现服务的负载均衡。而在Spring Cloud中推荐使用Ribbon来实现负载均衡。 1、Ribbon简介 Ribbon是Netflix发布的负载均衡器。它有助于控制HTTP和TCP客户端的行为。为Ribbon配置服务提供者地址列表后， Ribbon就可基于某种负载均衡算法，自动地帮助服务消费者去请求。Ribbon默认为我们提供了很多的负载均衡算法，例如轮询、随机等。当然，我们也可为 Ribbon实现自定义的负载均衡算法。 2、架构 3、开始使用Ribbon 3.1. 为microservice order增加ribbon依赖 <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-ribbon</artifactId></dependency> 其实，该依赖是可以省略的，因为spring-cloud-starter-netflix-eureka-client中已经包含了spring-cloud-starter-netflix-ribbon： 3.2. 为RestTemplate设置@LoadBalanced注解

What is the restTemplate.exchange() method for?

由 自作多情 提交于 2019-12-20 11:07:53
问题 Actually what does the restTemplate.exchange() method do? @RequestMapping(value = "/getphoto", method = RequestMethod.GET) public void getPhoto(@RequestParam("id") Long id, HttpServletResponse response) { logger.debug("Retrieve photo with id: " + id); // Prepare acceptable media type List<MediaType> acceptableMediaTypes = new ArrayList<MediaType>(); acceptableMediaTypes.add(MediaType.IMAGE_JPEG); // Prepare header HttpHeaders headers = new HttpHeaders(); headers.setAccept(acceptableMediaTypes

Spring RestTemplate postForObject with Header: webservice can't find my header parameters

由 心已入冬 提交于 2019-12-20 08:35:23
问题 I'm struggling with RestTemplate. I need to POST some authentication information to a rest webservice. I can send a request and I get a response. But according to the response my header parameters are not getting through. (Sending the same request with SOAPUI works fine) This is my code: HttpHeaders headers = new HttpHeaders(); headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED); headers.add("companyId", companyId); headers.add("password", password); HttpEntity<String> request = new

How to access a huge JSON coming (from a spring RESTful Service) in a spring MVC app using RestTemplate

由 这一生的挚爱 提交于 2019-12-20 03:29:27
问题 My Spring RESTful web service is returning a JSON form of- [{"key1":"value1","key2":"value2","key3":"value3"},{"key4":"value4","key5":"value5","key6":"value6"}] Now when my spring MVC app, try to access it, to show in a JSP then Exception occurs saying- no suitable HttpMessageConverter found Please help me where I going wrong.Here is my code- Inside @Controller class of my spring MVC app calling the RESTful service //**com.songs.controllers.FrontSongController.java** </* author Rohit Tiwari *

RestTemplate with ClientHttpRequestInterceptor causes GZIP compression twice

由 孤街浪徒 提交于 2019-12-19 10:32:37
问题 I am using a ClientHttpRequestInterceptor to add a Basic Authorization header to every request made by the RestTemplate in my Android project. I am also compressing the request body by setting the Content-Encoding header to "gzip" Adding an Interceptor to the RestTemplate causes the request.execute method to be called twice; compressing the body twice. Interceptor: public class BasicAuthRequestInterceptor implements ClientHttpRequestInterceptor { /** The base64 encoded credentials */ private
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