Question

1。我有“春布申请”和“界面”,实施一些缺省方法,并界定一种方法<代码>getGraphClient(:

interface GraphService {
    fun getGraphClient(): GraphServiceClient<Request>

    fun getAllUsers(): List<User> {
        // 。。。 using getGraphClient()
    }

    // 。。。
}

有两个服务,一个是“级联”栏,一个是“级联”栏,另一个是“级应用服务”栏。

@Service
class GraphUserService() {

    override fun getGraphClient(): GraphServiceClient<Request> {
        // build graph client for user requests
    }

}

。

@Service
class GraphApplicationService() {

    override fun getGraphClient(): GraphServiceClient<Request> {
        // build graph client for application requests
    }

}

现在,我有一个方法<代码>refreshUsers(>,载于Adminservice,通过一个时间表自动和定期启动:

@Service
class ScheduleService(
    private val adminService: AdminService
) {

    @Scheduled(cron = "@monthly")
    fun executeMonthlySchedule() {
        adminService。refreshUsers()
    }

}

Additionally, the method refreshUsers() can be triggered proactive by an user。

My aim: refreshUsers() should use the getAllUsers() method from the GraphUserService if its triggered by an user and the getAllUsers() method from the GraphApplicationService if its triggered by the automatic schedule。

How can I reach this? I thought of conditional beans but didn t come to a result until now。

Thanks in advance。

Answer 1

There are two important issues to solve. The language I used is Java, but I don t think Kotlin will be any different.

采用同一接口的豆类动态依赖注射
- This problem can be solved by using dynamic dependency injection using Map.
www.un.org/Depts/DGACM/index_spanish.htm 如何区分用户要求和时间表?
- A simple way that comes to mind is to plant a Flag in the user request, but @Scheduled annotated methods cannot have parameters.
然后?
- Wouldn’t it be possible to distinguish it by importing the path metadata that called the method?
- If it is a request from the user, we will usually call a submethod in the Controller class.
- For scheduling, no method is called in the Controller.
我的解决办法是使用斯特克特雷斯。

核查方法

Implemented a method to distinguish between methods of beans that implement the same interface.
In some cases, dependency injection will be done dynamically, so if a different output appears, verification is successful.

@Service
@RequiredArgsConstructor
public class ScheduleService {

    private final AdminService adminService;

    @Scheduled(cron = "0/1 * * * * ?")
    public void executeMonthlySchedule() {
        adminService.refreshUsers();
    }
}

@Service
public class GraphUserService implements GraphService {

    @Override
    public void getAllUsers() {
        System.out.println("GraphUserService.getAllUsers");
    }
}

@Service
public class GraphApplicationService implements GraphService {
    @Override
    public void getAllUsers() {
        System.out.println("GraphApplicationService.getAllUsers");
    }
}

@Slf4j
@Service
@RequiredArgsConstructor
public class AdminService {

    private final Map<String, GraphService> graphServiceMap;

    public void refreshUsers() {
        StackTraceElement[] ste = new Throwable().getStackTrace();
        String methodCallClassName = ste[2].getClassName();
        log.info("methodCallClassName={}", methodCallClassName);
        //if method call class name contain upper class name -> DI graphUserService
        GraphService graphService;
        if (methodCallClassName.contains("Controller")) {
            graphService = graphServiceMap.get("graphUserService");
        } else {
            graphService = graphServiceMap.get("graphApplicationService");
        }
        graphService.getAllUsers();
    }
}

/*
methodCallClassName=example.controller.AdminController
GraphUserService.getAllUsers
*/

/*
methodCallClassName=jdk.internal.reflect.DirectMethodHandleAccessor
GraphApplicationService.getAllUsers
*/

通过使用地图解决了依赖物的动态注入问题。
- There is also a way to use annotations, but I prefer this method because it is quite intuitive.
检查StackTraceElement的内容。
- I was able to check the path of the parent class that was the caller in ste[2].
- Depending on the coding, the index of this part may be at 0 or 1.
- There is a risk in using magic numbers, but the problem can be solved.
检查了AdminController的道路,以核实它用的是图表。在这种情况下,用户服务。
@Sbed电话也按预期运作。

可能有更好的想法,但我希望我的想法是有益的。

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