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首先聲明一點，這里的重試并不是報錯以后的重試，而是負載均衡客戶端發現遠程請求實例不可到達后，去重試其他實例。
@Bean
@LoadBalanced
RestTemplate restTemplate() {
HttpComponentsClientHttpRequestFactory httpRequestFactory = new HttpComponentsClientHttpRequestFactory();
httpRequestFactory.setReadTimeout(5000);
httpRequestFactory.setConnectTimeout(5000);
return new RestTemplate(httpRequestFactory);
}
feign重試機制
feign默認是通過自己包下的Retryer進行重試配置,默認是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取消重試
@Bean
Retryer feignRetryer() {
return Retryer.NEVER_RETRY;
}
feign請求超時設置
@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);
}
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