Could not obtain transaction-synchronized Session problem (fixed)

 以下程式最大問題是 createRandomAbstract 没有加 @Override @Transactional

修改以下CODE 便能解決問題

        @Override

@Transactional

public void createRandomAbstract(int theId) {

Book book=bookDao.getBook(theId);

Abstractpara abstractpara=new Abstractpara();

abstractpara.setContent("test 2");

abstractpara.setLanguage("English");

abstractpara.setBook(book);

book.addAbstractpara(abstractpara);

book=bookDao.saveBook(book);

}


======================================

package com.book.gen.domain.services.aggregates;


import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Service;

import org.springframework.transaction.annotation.Transactional;


import com.book.gen.domain.aggregates.repositories.BookAbstractparaDao;

import com.book.gen.domain.models.*;

import com.book.gen.domain.models.repositories.AbstractparaDao;

import com.book.gen.domain.models.repositories.BookDao;


@Service

public class BookAbstractparaServiceImpl implements BookAbstractparaService {

// need to inject book Dao

@Autowired

private BookDao bookDao;

// need to inject abstractpara Dao

@Autowired

private AbstractparaDao abstractparaDao;

@Autowired

private BookAbstractparaDao bookAbstractparaRepository;

public void createRandomAbstract(int theId) {

Book book=bookDao.getBook(theId);

Abstractpara abstractpara=new Abstractpara();

abstractpara.setContent("test 2");

abstractpara.setLanguage("English");

abstractpara.setBook(book);

book.addAbstractpara(abstractpara);

book=bookDao.saveBook(book);

}

}





Type Exception Report

Message Request processing failed; nested exception is org.hibernate.HibernateException: Could not obtain transaction-synchronized Session for current thread

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Exception

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.hibernate.HibernateException: Could not obtain transaction-synchronized Session for current thread
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1014)
	org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:529)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:623)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)

Root Cause

org.hibernate.HibernateException: Could not obtain transaction-synchronized Session for current thread
	org.springframework.orm.hibernate5.SpringSessionContext.currentSession(SpringSessionContext.java:142)
	org.hibernate.internal.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:454)
	com.book.gen.domain.models.repositories.BookDaoImpl.getBook(BookDaoImpl.java:87)
	com.book.gen.domain.services.aggregates.BookAbstractparaServiceImpl.createRandomAbstract(BookAbstractparaServiceImpl.java:24)
	com.book.gen.controllers.BookControllerImpl.bookgridviewdetail3(BookControllerImpl.java:327)
	java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
	java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	java.base/java.lang.reflect.Method.invoke(Method.java:568)
	org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:197)
	org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:141)
	org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:894)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808)
	org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1063)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
	org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:529)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:623)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)

Note The full stack trace of the root cause is available in the server logs.

Comments

Post a Comment

Popular posts from this blog

How to use Visual Studio Code to debug ReactJS application

Image
 In a Visual Studio Code (VS Code) environment, launch.json is part of the configuration for debugging. This file does not get automatically created when you set up a new React project or when you open an existing project in VS Code. Instead, you need to set up the debug configuration yourself if you want to use the debugging features of VS Code with your React application. Here's why your React project might not include a launch.json file and how you can add it: Why launch.json Might Not Be Present: Not Created by Default: React projects, created using tools like create-react-app, don't include a launch.json file in their setup. This file is specific to the VS Code editor and not to React itself. Project Setup: If the project was not initially set up in VS Code or if it was set up without debugging configurations, the launch.json file would not be present. Not Required for Basic Operation: For standard development tasks like writing code, running, and building the app, launch.
Read more

Github Link & Web application demonstration on YouTube

If you'd like to know about the work I did at my previous company, I developed several web systems and showcased them on YouTube. Most of these systems were not large-scale but were smaller systems primarily used internally by the company, such as for generating reports. You can view these systems to see if they meet the needs of your company. In my previous company, not only did I maintain large-scale systems, but I also developed systems with specific functionalities. I mainly displayed these smaller systems on my ReactJS portfolio. https://fusumwan.github.io/portfolio
Read more

Java Interview Questions and Answers 1.0

Hi everyone!  In this video,  we'll be diving into some of the most frequent Java interview questions and their answers.  Stay tuned! What is a ConcurrentModification Exception? A ConcurrentModificationException occurs when a collection is modified while it is being iterated over, in a non-thread-safe manner. This often happens in multi-threaded environments. What is a ConcurrentModification Exception? A ConcurrentModificationException occurs when a collection is modified while it is being iterated over, in a non-thread-safe manner. This often happens in multi-threaded environments. How can you invoke a method using the Reflection API? You can invoke a method using Reflection API by first obtaining the `Method` object for the method through the class's `getMethod` method. Then, use the `invoke` method on this `Method` object, passing the instance and parameters. How can you invoke a method using the Reflection API? You can invoke a method using Reflection API by first obtaining
Read more