Getting error "Turn your Session into FlushMode.COMMIT/AUTO or remove 'readOnly' marker from transaction definition" - spring

Question

I'm getting the error:
Write operations are not allowed in read-only mode (FlushMode.MANUAL): Turn your Session into FlushMode.COMMIT/AUTO or remove 'readOnly' marker from transaction definition.
LoginController.java
#Controller
public class LoginController {
#Autowired
private RegisterDao dao;
#RequestMapping(value = "registerpage", method = RequestMethod.GET)
public ModelAndView getRegisterPage() {
System.out.println("control is in getRegister method");
return new ModelAndView("register", "reg", new Register());
}
#RequestMapping(value = "registeruser", method = RequestMethod.POST)
public ModelAndView registerUser(HttpServletRequest request) {
System.out.println("control is in registeruser method");
Register register = new Register();
register.setUname(request.getParameter("uname"));
register.setPassword(request.getParameter("password"));
register.setEmail(request.getParameter("email"));
register.setDob(request.getParameter("dob"));
register.setAge(request.getParameter("age"));
register.setCountry(request.getParameter("country"));
dao.addUser(register);
return new ModelAndView("success");
}
#RequestMapping(value = "delete", method = RequestMethod.GET)
public ModelAndView delete() {
return new ModelAndView("delete");
}
#RequestMapping(value = "deleteUser", method = RequestMethod.DELETE)
public void deleteUser(#RequestParam("uname") String uname, ModelMap map) {
Register register = new Register();
register.setUname(uname);
dao.deleteUser(register);
}
#RequestMapping(value = "readUsers", method = RequestMethod.GET)
public List<Register> usersList(ModelMap map) {
List<Register> register = dao.readUsers();
map.addAttribute("Users", register);
return register;
}
}
Register.java
`package com.spring.dao;
import java.util.List;
import com.spring.model.Register;
public interface RegisterDao {
public void addUser(Register register);
public List<Register> readUsers();
public void deleteUser(Register register);
}
Spring-servlet.xml
<context:component-scan base-package="com.spring" />
<mvc:annotation-driven />
<tx:annotation-driven />
<tx:annotation-driven transaction-manager="transactionManager" />
<bean id="handlerMapping" class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"></bean>
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/" />
<property name="suffix" value=".jsp" />
</bean>
<bean id="template" class="org.springframework.orm.hibernate5.HibernateTemplate">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<bean class="org.springframework.orm.hibernate5.LocalSessionFactoryBean"
id="sessionFactory">
<property name="dataSource" ref="dataSource"></property>
<property name="annotatedClasses">
<list>
<value>com.spring.model.Register</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
</bean>
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="oracle.jdbc.driver.OracleDriver" />
<property name="url" value="jdbc:oracle:thin:#localhost:1521:xe" />
<property name="username" value="scott" />
<property name="password" value="tiger" />
</bean>
#Service
public class RegisterDaoImpl implements RegisterDao {
#Autowired
private HibernateTemplate template;
public void addUser(Register register,HttpServletRequest request,HttpServletResponse response) {
// TODO Auto-generated method stub
System.out.println("control is in adduser method of daoimpl");
template.saveOrUpdate(register);
}
public List<Register> readUsers() {
// TODO Auto-generated method stub
System.out.println("control is in readuser method of daoimpl");
List<Register> list = template.loadAll(Register.class);
return list;
}
public void deleteUser(Register register) {
// TODO Auto-generated method stub
System.out.println("control is in deleteuser method of daoimpl");
template.delete(register);
}
public void addUser(Register register) {
// TODO Auto-generated method stub
template.save(register);
}
}
pom.xml
http://maven.apache.org/xsd/maven-4.0.0.xsd">
4.0.0
<groupId>com.spring</groupId>
<artifactId>RegistrationWithSpringMvc</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>RegistrationWithSpringMvc</name>
<url>http://maven.apache.org</url>
<dependencies>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.3.2.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-web -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.3.2.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.hynnet/oracle-driver-ojdbc6 -->
<dependency>
<groupId>com.oracle</groupId>
<artifactId>ojdbc6</artifactId>
<version>11.2.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-orm -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>4.3.2.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-entitymanager -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>4.3.2.Final</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-validator -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>5.2.4.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.2.0.Final</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.servlet/jstl -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-api -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.21</version>
</dependency>
<dependency>
<groupId>org.jboss.logging</groupId>
<artifactId>jboss-logging</artifactId>
<version>3.3.0.Final</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.0.2</version>
<configuration>
<source>1.5</source>
<target>1.5</target>
</configuration>
</plugin>
</plugins>
</build>

Answer 1

Add method setTemplate() and setCheckWriteOperation(false) for template inside your RegisterDAOImpl.
public void setTemplate(HibernateTemplate template) {
template.setCheckWriteOperations(false);
this.template = template;
}