SpringCloud重试机制配置

 

 

    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);
}