package com.ruoyi.gateway.handler;
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import com.alibaba.csp.sentinel.adapter.gateway.sc.callback.GatewayCallbackManager;
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import com.alibaba.csp.sentinel.slots.block.BlockException;
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import com.ruoyi.common.core.utils.ServletUtils;
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import org.springframework.web.reactive.function.server.ServerResponse;
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import org.springframework.web.server.ServerWebExchange;
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import org.springframework.web.server.WebExceptionHandler;
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import reactor.core.publisher.Mono;
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/**
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* 自定义限流异常处理
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*
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* @author ruoyi
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*/
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public class SentinelFallbackHandler implements WebExceptionHandler {
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private Mono<Void> writeResponse(ServerResponse response, ServerWebExchange exchange) {
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return ServletUtils.webFluxResponseWriter(exchange.getResponse(), "请求超过最大数，请稍候再试");
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}
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@Override
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public Mono<Void> handle(ServerWebExchange exchange, Throwable ex) {
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if (exchange.getResponse().isCommitted()) {
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return Mono.error(ex);
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}
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if (!BlockException.isBlockException(ex)) {
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return Mono.error(ex);
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}
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return handleBlockedRequest(exchange, ex).flatMap(response -> writeResponse(response, exchange));
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}
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private Mono<ServerResponse> handleBlockedRequest(ServerWebExchange exchange, Throwable throwable) {
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return GatewayCallbackManager.getBlockHandler().handleRequest(exchange, throwable);
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}
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}
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