Feign显示fallback异常原因
我在最一开始使用Feign的时候，是使用FallBack类去实现的FeignClient接口，就像这样
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| @FeignClient(name = "SPRINGCLOUD2-PROVIDER",contextId = "DeptClient",
fallback = DeptClient.DeptClientFallBack.class)
public interface DeptClient {
@GetMapping(value = "/dept/get/{id}")
CommonResult<Dept> get(@PathVariable("id") long id);
@GetMapping("/timeout")
String timeout();
@Component
class DeptClientFallBack implements DeptClient{
@Override
public CommonResult<Dept> get(long id) {
return null;
}
@Override
public String timeout() {
return null;
}
}
}
|
但是这样的话，我发现没有办法查看是因为什么原因造成的fallback呢，这种方法肯定是不行的
然后发现@FeignClient注解中有一个属性是fallbackFactory，看着这个是有一个Throwable参数的，拿来试一试
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| T create(Throwable cause);
|
说干就干
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| @FeignClient(name = "SPRINGCLOUD2-PROVIDER",contextId = "DeptClient",
fallbackFactory = DeptClientFallBackFactory.class)
public interface DeptClient {
@GetMapping(value = "/dept/get/{id}")
CommonResult<Dept> get(@PathVariable("id") long id);
@GetMapping("/timeout")
String timeout();
}
@Component
public class DeptClientFallBackFactory implements FallbackFactory<DeptClient> {
@Override
public DeptClient create(Throwable throwable) {
return new DeptClient() {
@Override
public CommonResult<Dept> get(long id) {
System.out.println("fallback 原因:"+throwable.getMessage());
CommonResult<Dept> result = new CommonResult<>();
result.isOk();
return result;
}
@Override
public String timeout() {
return null;
}
};
}
}
|
可以拿到异常信息了