SpringSpring 고급편Decorator 패턴

Spring 핵심원리 고급편 - 구체 클래스 기반 프록시 적용 2

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Spring 핵심원리 고급편 - 구체 클래스 기반 프록시 적용 2

public class OrderRepositoryConcreteProxy extends OrderRepositoryV2 {

    private final OrderRepositoryV2 target;
    private final LogTrace logTrace;

    public OrderRepositoryConcreteProxy(OrderRepositoryV2 target, LogTrace logTrace) {
        this.target = target;
        this.logTrace = logTrace;
    }

    @Override
    public void save(String itemId) {
        TraceStatus status = null;

        try{
            status = logTrace.begin("OrderRepository.request()");
            // target 호출
            target.save(itemId);
            logTrace.end(status);
        }catch (Exception ex){
            logTrace.exception(status, ex);
            throw ex;
        } 
    }
}

public class OrderServiceConcreteProxy extends OrderServiceV2 {

    private final OrderServiceV2 target;
    private final LogTrace logTrace;

    public OrderServiceConcreteProxy(OrderServiceV2 target, LogTrace logTrace) {
        super(null);
        this.target = target;
        this.logTrace = logTrace;
    }

    @Override
    public void orderItem(String itemId) {
        TraceStatus status = null;

        try{
            status = logTrace.begin("OrderService.orderItem()");
            // target 호출
            target.orderItem(itemId);
            logTrace.end(status);
        }catch (Exception ex){
            logTrace.exception(status, ex);
            throw ex;
        }
    }
}
public class OrderControllerConcreteProxy extends OrderControllerV2 {

    private final OrderControllerV2 target;
    private final LogTrace logTrace;

    public OrderControllerConcreteProxy(OrderControllerV2 target, LogTrace logTrace) {
        super(null);
        this.target = target;
        this.logTrace = logTrace;
    }

    @Override
    public String request(String itemId) {
        TraceStatus status = null;

        try{
            status = logTrace.begin("OrderController.request()");
            // target 호출
            String result = target.request(itemId);
            logTrace.end(status);

            return result;
        }catch (Exception ex){
            logTrace.exception(status, ex);
            throw ex;
        }
    }

    @Override
    public String noLog() {
        return target.noLog();
    }
}
@Configuration
public class ConcreteProxyConfig {

    @Bean
    public OrderControllerV2 orderControllerV2(LogTrace logTrace){
        OrderControllerV2 controllerImpl = new OrderControllerV2(orderServiceV2(logTrace));
        return new OrderControllerConcreteProxy(controllerImpl, logTrace);
    }

    @Bean
    public OrderServiceV2 orderServiceV2(LogTrace logTrace){
        OrderServiceV2 serviceImpl = new OrderServiceV2(orderRepositoryV2(logTrace));
        return new OrderServiceConcreteProxy(serviceImpl, logTrace);
    }

    @Bean
    public OrderRepositoryV2 orderRepositoryV2(LogTrace logTrace){
        OrderRepositoryV2 repositoryImpl = new OrderRepositoryV2();
        return new OrderRepositoryConcreteProxy(repositoryImpl, logTrace);
    }
}
//@Import(AppV1Config.class)
//@Import({AppV1Config.class, AppV2Config.class})
//@Import(InterfaceProxyConfig.class)
@Import(ConcreteProxyConfig.class)
@SpringBootApplication(scanBasePackages = "hello.proxy.app") //주의
public class ProxyApplication {

    public static void main(String[] args) {
        SpringApplication.run(ProxyApplication.class, args);
    }

    @Bean
    public LogTrace logTrace(){
        return new ThreadLocalLogTrace();
    }
}
2021-11-28 14:45:36.692  INFO 98295 --- [nio-8080-exec-1] h.p.trace.logtrace.ThreadLocalLogTrace   : [56d57615] OrderController.request()
2021-11-28 14:45:36.693  INFO 98295 --- [nio-8080-exec-1] h.p.trace.logtrace.ThreadLocalLogTrace   : [56d57615] |-->OrderService.orderItem()
2021-11-28 14:45:36.693  INFO 98295 --- [nio-8080-exec-1] h.p.trace.logtrace.ThreadLocalLogTrace   : [56d57615] |   |-->OrderRepository.request()
2021-11-28 14:45:37.696  INFO 98295 --- [nio-8080-exec-1] h.p.trace.logtrace.ThreadLocalLogTrace   : [56d57615] |   |<--OrderRepository.request() time=1003ms
2021-11-28 14:45:37.696  INFO 98295 --- [nio-8080-exec-1] h.p.trace.logtrace.ThreadLocalLogTrace   : [56d57615] |<--OrderService.orderItem() time=1003ms
2021-11-28 14:45:37.697  INFO 98295 --- [nio-8080-exec-1] h.p.trace.logtrace.ThreadLocalLogTrace   : [56d57615] OrderController.request() time=1005ms
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