package com.ruoyi.gateway.handler;
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import com.alibaba.fastjson.JSON;
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import com.ruoyi.common.core.domain.R;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.http.HttpStatus;
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import org.springframework.http.MediaType;
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import org.springframework.stereotype.Component;
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import org.springframework.web.reactive.function.BodyInserters;
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import org.springframework.web.reactive.function.server.HandlerFunction;
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import org.springframework.web.reactive.function.server.ServerRequest;
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import org.springframework.web.reactive.function.server.ServerResponse;
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import reactor.core.publisher.Mono;
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import java.util.Optional;
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import static org.springframework.cloud.gateway.support.ServerWebExchangeUtils.GATEWAY_ORIGINAL_REQUEST_URL_ATTR;
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/**
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* 熔断降级处理
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*
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* @author ruoyi
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*/
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@Component
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public class HystrixFallbackHandler implements HandlerFunction<ServerResponse>
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{
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private static final Logger log = LoggerFactory.getLogger(HystrixFallbackHandler.class);
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@Override
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public Mono<ServerResponse> handle(ServerRequest serverRequest)
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{
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Optional<Object> originalUris = serverRequest.attribute(GATEWAY_ORIGINAL_REQUEST_URL_ATTR);
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originalUris.ifPresent(originalUri -> log.error("网关执行请求:{}失败,hystrix服务降级处理", originalUri));
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return ServerResponse.status(HttpStatus.INTERNAL_SERVER_ERROR.value()).contentType(MediaType.APPLICATION_JSON)
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.body(BodyInserters.fromValue(JSON.toJSONString(R.failed("服务已被降级熔断"))));
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}
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}
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