Question

以下是保存图书清单，学生名单和班级的班级。到学生和学生的映射根据一些限制进行预订。

class SaveMyDataService {
     @ Transactional(propagation = Propagation.REQUIRES_NEW)
    def saveBooks(List < Book > bookList) {

        /*
        some operation on bookList and then saving each Book Object individually
         */

    }
     @ Transactional(propagation = Propagation.REQUIRES_NEW)
    def saveStudent(List < Student > studentList) {

        /*
        some operation on studentList and then saving each Student Object individually
         */

    }

     @ Transactional(propagation = Propagation.REQUIRES_NEW)
    def saveStudentBookMapping() {

        List < Book > bookList = Book.getAll();
        List < Student > studentList = Studnet.getAll();

        for (int i = 0; i < studnetList.size(); i++) {
            StudentBookMapping obj = new StudentBookMapping();
            /*
            after some operation we map the Book & Student and save the StudentBookMapping Object
             */
            obj.save();
        }

    }

}

此服务类调用SaveMyDataService＆amp;的方法。获取数据的其他服务，然后进行一些评估在这种情况下可能会出现异常的情况我希望能够回滚所有数据，即书籍，学生和他们的映射但它没有成功。

class FetchAllNewBooksAndStudent{

    def saveMyDataService;
    def xmlParsingSerivice;
    def evaluationService;

    getStudentAndBooksData()
    {
        try{
        /*
            Some IO operations to get the Student & Book List from XML
        */
        List<Student> studList = xmlParsing.getStudList();
        List<Book> bookList = xmlParsing.getBookList();

        // here we call the save book service
        saveMyDataService.saveBooks(bookList);

        // here we call the save Student service
        saveMyDataService.saveStudent(studList);


        // here we call the mapping service to map the Student & Books
        saveMyDataService.saveStudentBookMapping();

        /*
            after this I do some Evaluation operation but here might be chances of getting exception in such a case I want to rollback all the above entries made like books, student & their mapping but its not working out 
        */

        evaluationService.evaluate();


        }
        catch(Exception e)
        {
            log.error e.getMessage();
        }

    }
}

此作业在每4小时后运行以检查Student / Books / StudentBookMapping的新数据并调用fetchAllNewBooksAndStudent类的getStudentAndBooksData服务

class RegularBookStudentCheckJob{

    def fetchAllNewBooksAndStudent;

    static triggers = {
        simple repeatInterval: Long.parseLong(ConfigHolder.config.REGULAR_BOOK_STUDENT_CHECK_JOB_REPEAT_INTERVAL), // here value is 4hrs
        startDelay : 60000
    }


    def execute(){

        if(String.valueOf(ConfigHolder.config.RUN_BOOK_STUDENT_CHECK_JOB).equalsIgnoreCase("true"))
        {
            fetchAllNewBooksAndStudent.getStudentAndBooksData();
        }

    }


}

这里我的问题是在评估失败的情况下我希望完全回滚所有数据，但是它没有成功，请你告诉我哪里出错了。

提前感谢您的帮助！

Answer 1

调用save（）方法时，传递failOnError的参数：true，即;保存（failOnError：真）

如果在以下情况下grails失败的情况下如何回滚

1 个答案: