templates.gateway.GlobalExceptionHandler.ftl Maven / Gradle / Ivy
package ${packageName}.gateway.handler;
import com.alibaba.fastjson2.JSON;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.web.reactive.error.ErrorWebExceptionHandler;
import org.springframework.cloud.gateway.support.NotFoundException;
import org.springframework.core.annotation.Order;
import org.springframework.core.io.buffer.DataBufferFactory;
import org.springframework.http.MediaType;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.web.server.ResponseStatusException;
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.server.handler.ResponseStatusExceptionHandler;
import org.yes.tools.core.exception.ExceptionCodeEnum;
import org.yes.tools.core.exception.YesBaseException;
import org.yes.tools.core.result.CommonResult;
import reactor.core.publisher.Mono;
/***
* 网关异常通用处理器，只作用在webflux 环境下 , 优先级低于 {@link ResponseStatusExceptionHandler} 执行
*
* @author Co.
* @date: 2022/10/15 11:19
* @return
*/
@Slf4j
@Order(-1)
@RequiredArgsConstructor
public class GlobalExceptionHandler implements ErrorWebExceptionHandler {
private final ObjectMapper objectMapper;
@Override
public Mono handle(ServerWebExchange exchange, Throwable ex) {
ServerHttpResponse response = exchange.getResponse();
if (response.isCommitted()) {
return Mono.error(ex);
}
// header set
response.getHeaders().setContentType(MediaType.APPLICATION_JSON);
if (ex instanceof ResponseStatusException) {
response.setStatusCode(((ResponseStatusException) ex).getStatusCode());
}
return response.writeWith(Mono.fromSupplier(() -> {
DataBufferFactory bufferFactory = response.bufferFactory();
try {
if (ex instanceof NotFoundException) {
return bufferFactory.wrap(objectMapper.writeValueAsBytes(JSON.toJSON(CommonResult.failed(ExceptionCodeEnum.NOT_FOUND))));
}
if (ex instanceof YesBaseException) {
return bufferFactory.wrap(objectMapper.writeValueAsBytes(JSON.toJSON(CommonResult.failed(Integer.parseInt(((YesBaseException) ex).getCode()), ex.getMessage()))));
}
return bufferFactory.wrap(objectMapper.writeValueAsBytes(JSON.toJSON(CommonResult.failed(ex.getMessage()))));
} catch (JsonProcessingException e) {
log.error("Error writing response", ex);
return bufferFactory.wrap(new byte[0]);
}
}));
}
}