[microservices openfeign] two degradation methods of feign ｜ fallback ｜ fallbackfactory

Above, we are right @FeignClient Made a detailed introduction , Next , Let's come together feign Two degradation methods .

fallbackFactory recommend ： You can catch exception information and return the default degradation result . Stack information can be printed .

Fallback

Fault tolerant class

import com.ossa.feign.api.producer.ProducerFeign;
import feign.hystrix.FallbackFactory;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

/** * @author issavior */
@Slf4j
@Service
public class ProducerFeignFallback implements ProducerFeign {
    

    @Override
    public String producerById(String id) {
    
        String msg = "fallback Current limiting method ";
        return id + msg;
    }
}

FeignClient

import com.ossa.feign.config.FeignClientConfig;
import com.ossa.feign.fallback.ProducerFeignFallback;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;



/** * @author issavior */
@FeignClient(value = "ossa-service-producer", configuration = FeignClientConfig.class,fallback = ProducerFeignFallback.class)
public interface ProducerFeign {
    

    /** *  according to ID Query products  * * @param id  The primary key of the item ID * @return  Information about related products  */
    @GetMapping(value = "/producer/{id}")
    String producerById(@PathVariable("id") String id);

}

FallbackFactory

Fault tolerant class

import com.ossa.feign.api.producer.ProducerFeign;
import feign.hystrix.FallbackFactory;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

/** * @author issavior */
@Slf4j
@Service
public class ProducerFeignFallback implements FallbackFactory<ProducerFeign> {
    

    @Override
    public ProducerFeign create(Throwable throwable) {
    
        return id -> {
    
            log.info(" The error is ：{}", throwable.getMessage());
            String msg = "fallback Current limiting method ";
            return id + msg;
        };
    }
}

FeignClient

import com.ossa.feign.config.FeignClientConfig;
import com.ossa.feign.fallback.ProducerFeignFallback;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;



/** * @author issavior */
@FeignClient(value = "ossa-service-producer", configuration = FeignClientConfig.class,fallbackFactory = ProducerFeignFallback.class)
public interface ProducerFeign {
    

    /** *  according to ID Query products  * * @param id  The primary key of the item ID * @return  Information about related products  */
    @GetMapping(value = "/producer/{id}")
    String producerById(@PathVariable("id") String id);

}