UnwrapExceptionMappingInterceptor¶

요격을 이용하여 PmisLog.log method를 자동이 호출한다 예시:

try{ ... }catch(Exception e) { PmisLog.log(e); ... } // 이 구문은 필요 없다

Note

If try catch statement is required in action method, is always good to throw again the exception every time, unless different action is required on exception raised.

try{
    ...
} catch(Exception ex) {
    ...
    PmisLog.log(...); //NOT GOOD!
}

try{
    ...
} catch(Exception ex) {
    ...
    PmisLog.log(...);
    throw ex; //GOOD!
}

Note

[Please note that on action methods PmisLog.log(...) is not needed anymore! The UnwrapExceptionMappingInterceptor will handle the exception and PmisLog.log() will be called.]

Warning

IMPORTANT: If on action method is not requested try catch statement, don’t use it.

Warning

If exception arise, the UnwrapExceptionMappingInterceptor will handle it, and PmisLog.log() will be called, don’t worry!

public class NameAction {

    public String boringMethodName() {
        String result = "ERROR";
        try{
            ...
            result = "SUCCESS";
        }catch(Exception e) {
            ...
            PmisLog.log(...);
        }
        return result;
    }

    [The result ERROR is not needed; if exception arise the request will be redirected automatically on the error page,
    as defined on struts.xml configuration file under <global-results> tag]

    public String notGoodMethodName() {
        try{
            ...
        }catch(Exception e) {
            ...
            PmisLog.log(...);
        }
        return SUCCESS;
    }

    public String goodMethodName() throws Exception {
        try{
            ...
        }catch(Exception e) {
            // Some action before throw again the exception!
            ...
            throw e;
        }
        return SUCCESS;
    }

    public String anotherGoodMethodName() throws Exception {
        ...
        return SUCCESS;
    }

    public String anotherMoreGoodMethodName() {
        try{
            ...
        }catch(Exception e) {
            // Some action before throw again the exception!
            ...
            Errors.lower(e);
        }
        return SUCCESS;
    }
}

Note

[Errors.lower(e) will hide the exception on the current method, so you don’t need to put throws Exception on the class definition; the Errors.lower(e) will throw a RuntimeException. Take a look at Errors class for more methods!]