resttemplate

前言： 　　之前写了通过Ribbon+RestTemplate实现调用服务，此处我再系统的说一下两者的区别 一、springcloud的负载均衡策略 　　1、Ribbon　 是基于Netflix Ribbon实现的一套客户端 负载均衡的工具，类似Nginx 主要功能时提供客户端的软件负载均衡算法 LB就是负载均衡，集中式(F5)，进程内(Nginx)，消费者可以自动看 从Eureka中拿到对应的服务列表，默认进行轮询RoundRobinRule 下图是RestTemplate的自带的7中均衡策略 我们在之前通过Ribbon+RestTemplate实现调用服务的时候，在获取RestTemplate的方法上加了@LoadBalanced ,实现默认轮询，如果需要更改其均衡策略，则在配置类中声明想要的均衡策略 具体实现参考： https://www.cnblogs.com/guanyuehao0107/p/11819375.html @Configuration public class RestConfig { @Bean //通过RestTemplate来实现调用接口 @LoadBalanced //表示RestTemplate开启了负载均衡 public RestTemplate getRestTemplate(){ return new RestTemplate(); } /

Recently I ran into a problem where I needed to do a GET request to a remote service (Using a simple servlet i presume), and RestTemplate returned Too many redirects! . After some investigation, it seems like the first request made to the specified remote service, is actually just a 302-redirect (to itself) with some Set-Cookie headers. If I were using a "normal" browser, it would acknowledge the header, set the cookies correctly, and follow the redirect where it should meet a normal 200 response. What I've found is that RestTemplate doesn't accept the Set-Cookie header, so the redirect gets

I am writing a Rest client to post JSON data using Spring RestTemplate. Using POSTMAN and following JSON data in body get the response correctly- { "InCode":"test", "Name":"This is test", "Email":"test@gmail.com", "Id":18, } However when trying to hit the REST API using Spring RestTemplate as follows ResponseEntity<String> response = restTemplate.exchange(baseUrl, HttpMethod.POST, getHeaders(), String.class); private HttpEntity<?> getHeaders() throws JSONException { JSONObject request = new JSONObject(); request.put("Email", "test@gmail.com"); request.put("Id", "18"); request.put("Name", "This

I am working on Spring Boot Eureka Client Application with Ribbon Load Balancer. I have two instances of the server registered with Eureka with the name "TEST". On the client side, I have the following code to fetch the server from Eureka. @Configuration @ComponentScan @EnableAutoConfiguration @EnableEurekaClient @RestController public class EurekaConsumerApplication { @Autowired DiscoveryClient discoveryClient; @Autowired RestTemplate restTemplate; @RequestMapping(value = "/",method = RequestMethod.GET) String consumer(){ InstanceInfo instance = discoveryClient.getNextServerFromEureka("TEST",

首先我们先来了解负载均衡： 负载均衡是为了缓解网络压力的，服务器端进行扩容的重要手段 　实现有两种方式：硬件F5 、 软件nginx、Dubbo 为了实现负载均衡的原理，我们基于以下两篇随笔继续学习 Euraka适合初学者的简单小demo 作为消费者访问提供者提供的功能(eureka的铺垫案例) 创建多个提供者的角色存在。 在消费者的实现中： (1) 修改pom文件，加入web、客户端的依赖 <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId> </dependency> (2) application.yml文件中，配置eureka的相关配置 server: port: 80 #EurekaServer配置 eureka: client: register-with-eureka: false #不注册到其他的注册中心 fetch-registry:

I don't understand how to use AsyncRestTemplate effectively for making external service calls. For the code below: class Foo { public void doStuff() { Future<ResponseEntity<String>> future1 = asyncRestTemplate.getForEntity( url1, String.class); String response1 = future1.get(); Future<ResponseEntity<String>> future2 = asyncRestTemplate.getForEntity( url2, String.class); String response2 = future2.get(); Future<ResponseEntity<String>> future3 = asyncRestTemplate.getForEntity( url3, String.class); String response3 = future3.get(); } } Ideally I want to execute all 3 calls simultaneously and

Is it possible to set header as part of getForEntity method or should I use exchange? I am trying to set oauth header as part of getForEntity calls. You can use .exchange : ResponseEntity<YourResponseObj> entity = new TestRestTemplate().exchange( "http://localhost:" + port + "/youruri", HttpMethod.GET, new HttpEntity<Object>(headers), YourResponseObj.class); Full Junit sample: @RunWith(SpringRunner.class) @SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT) public class ReferenceTablesControllerTests { @LocalServerPort private int port; @Test public void getXxxx() throws Exception {

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); the value of the endpointUrl Variable is http://127.0.0.1/service/v4_1/rest.php and it's exactely what