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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(fā)現(xiàn)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(shè)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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