框架初始化

mitao

2024-05-16 4965b67d9e2a8e99894bd40aff7c88d695ec4040

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