SpringCloud重试机制配置详解

  • Z时代
  • 2024-01-10
  • 分类：综合

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);
}

以上是 SpringCloud重试机制配置详解 的全部内容， 来源链接： utcz.com/z/329081.html

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