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[product] ProductController에서 항상 Exception 던지게 수정하기 (장애 상황 흉내)

Code Block

@RestController
@RequestMapping("/products")
public class ProductController {

    @GetMapping(path = "{productId}")
    public String getProductInfo(@PathVariable String productId) {
        // return "[product id = " + productId + " at " + System.currentTimeMillis() + "]";
        throw new RuntimeException("I/O Exception");
    }
}

[display] ProductRemoteServiceImp에 ProductRemoteServiceImpl에 Fallback Method 작성하기

Code Block

@Service
public class ProductRemoteServiceImpl implements ProductRemoteService {

    private static final String url = "http://localhost:8082/products/";
    private final RestTemplate restTemplate;

    public ProductRemoteServiceImpl(RestTemplate restTemplate) {
        this.restTemplate = restTemplate;
    }

    @Override
    @HystrixCommand(fallbackMethod = "getProductInfoFallback")
    public String getProductInfo(String productId) {
        return this.restTemplate.getForObject(url + productId, String.class);
    }

    public String getProductInfoFallback(String productId) {
        return "[ this product is sold out ]";
    }
}

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