亲宝软件园·资讯

展开

SpringCloud重试 SpringCloud重试机制配置详解

张建斌 人气:5
想了解SpringCloud重试机制配置详解的相关内容吗,张建斌在本文为您仔细讲解SpringCloud重试的相关知识和一些Code实例,欢迎阅读和指正,我们先划重点:spring,cloud,重试,springcloud,重试配置,下面大家一起来学习吧。

首先声明一点,这里的重试并不是报错以后的重试,而是负载均衡客户端发现远程请求实例不可到达后,去重试其他实例。

@Bean
@LoadBalanced
RestTemplate restTemplate() {
  HttpComponentsClientHttpRequestFactory httpRequestFactory = new HttpComponentsClientHttpRequestFactory();
  httpRequestFactory.setReadTimeout(5000);
  httpRequestFactory.setConnectTimeout(5000);
  return new RestTemplate(httpRequestFactory);
} 

feign重试机制 

feign默认是通过自己包下的Retryer进行重试配置,默认是5次

package feign;
import static java.util.concurrent.TimeUnit.SECONDS;

/**
 * Cloned for each invocation to {@link Client#execute(Request, feign.Request.Options)}.
 * Implementations may keep state to determine if retry operations should continue or not.
 */
public interface Retryer extends Cloneable {

 /**
  * if retry is permitted, return (possibly after sleeping). Otherwise propagate the exception.
  */
 void continueOrPropagate(RetryableException e);

 Retryer clone();

 public static class Default implements Retryer {

  private final int maxAttempts;
  private final long period;
  private final long maxPeriod;
  int attempt;
  long sleptForMillis;

  public Default() {
   this(100, SECONDS.toMillis(1), 5);
  }

  public Default(long period, long maxPeriod, int maxAttempts) {
   this.period = period;
   this.maxPeriod = maxPeriod;
   this.maxAttempts = maxAttempts;
   this.attempt = 1;
  } 

feign取消重试

@Bean
  Retryer feignRetryer() {
    return Retryer.NEVER_RETRY;
  } 

feign请求超时设置

@Bean
Request.Options requestOptions(ConfigurableEnvironment env){
  int ribbonReadTimeout = env.getProperty("ribbon.ReadTimeout", int.class, 6000);
  int ribbonConnectionTimeout = env.getProperty("ribbon.ConnectTimeout", int.class, 3000);

  return new Request.Options(ribbonConnectionTimeout, ribbonReadTimeout);
}

加载全部内容

相关教程
猜你喜欢
用户评论