Added changes to show transaction roll back

persistence-modules/spring-jpa-2/src/main/java/com/baeldung/spring/transaction/Course.java

@@ -0,0 +1,35 @@
+package com.baeldung.spring.transaction;
+
+import java.io.Serializable;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.Table;
+
+@Entity
+@Table(name = "course")
+public class Course implements Serializable {
+    
+    private static final long serialVersionUID = 1L;
+    
+    @Id
+    @Column(name = "id")
+    private Long id;
+    
+    public Course() {
+    }
+    
+    public Course(Long id) {
+        this.id = id;
+    }
+    
+    public Long getId() {
+        return id;
+    }
+    
+    public void setId(Long id) {
+        this.id = id;
+    }
+    
+}

persistence-modules/spring-jpa-2/src/main/java/com/baeldung/spring/transaction/CourseDao.java

@@ -0,0 +1,24 @@
+package com.baeldung.spring.transaction;
+
+import java.sql.SQLException;
+
+import org.springframework.dao.DataIntegrityViolationException;
+import org.springframework.stereotype.Repository;
+
+import com.baeldung.spring.hibernate.AbstractHibernateDao;
+
+@Repository
+public class CourseDao extends AbstractHibernateDao<Course> {
+    public CourseDao() {
+        super();
+        setClazz(Course.class);
+    }
+    
+    public Course createWithRuntimeException(final Course entity) {
+        throw new DataIntegrityViolationException("Throwing exception for demoing Rollback!!!");
+    }
+    
+    public Course createWithCheckedException(final Course entity) throws SQLException {
+        throw new SQLException("Throwing exception for demoing Rollback!!!");
+    }
+}

persistence-modules/spring-jpa-2/src/main/java/com/baeldung/spring/transaction/CourseService.java

@@ -0,0 +1,38 @@
+package com.baeldung.spring.transaction;
+
+import java.sql.SQLException;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.transaction.interceptor.TransactionAspectSupport;
+
+@Service
+public class CourseService {
+    
+    @Autowired
+    private CourseDao courseDao;
+    
+    @Transactional
+    public void createCourseDeclarativeWithRuntimeException(Course course) {
+        courseDao.createWithRuntimeException(course);
+    }
+    
+    @Transactional(rollbackFor = { SQLException.class })
+    public void createCourseDeclarativeWithCheckedException(Course course) throws SQLException {
+        courseDao.createWithCheckedException(course);
+    }
+    
+    public void createCourseDefaultRatingProgramatic(Course course) {
+        try {
+            courseDao.createWithRuntimeException(course);
+        } catch (Exception e) {
+            TransactionAspectSupport.currentTransactionStatus().setRollbackOnly();
+        }
+    }
+    
+    public Course findById(Long id) {
+        return courseDao.findOne(id);
+    }
+    
+}