CODEWITHSUNDEEP
hibernatespringspring-mvcannotationsspring-annotations
Sagar
Sagar

Reputation: 1262

@autowired annotation issue, not injecting bean in class, using Spring3.0, hibernate

following is my class:

package com.abc.trade.util;

public class StockTraderLogger {

    static Logger logger = Logger.getLogger("StockTraderLogger");

    @Autowired
    ConfigService configService; 




    public static void debug(Object className, Object logMessage) {     
        try {
            System.out.println("in debug.. ");
            StockTraderLogger stl =new StockTraderLogger();
            stl.addMessage(""+convertToString(className)+"\t"+convertToString(logMessage));
            System.out.println("in debug..post ");
        } catch (DataAccessException e) {
            System.out.println("Caught exception...");
                e.printStackTrace();
        }
    }

    public void addMessage(String message) throws DataAccessException {
        System.out.println("in  add message of util. ");
        System.out.println("String: " + configService); 

        configService.addMessage(message);          
    }
}

@Autowire annotation is not working. It is displaying value of configService as null when called addMessage method. however it is properly injected in some of my Controller classes but not here.

Can anyone explain what is problem? and how to resolve this issue?

Code for XML is:(beansdefinition.xml) 

   <?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xmlns:aop="http://www.springframework.org/schema/aop"
           xmlns:tx="http://www.springframework.org/schema/tx"
           xmlns:context="http://www.springframework.org/schema/context"
           xsi:schemaLocation="
           http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
           http://www.springframework.org/schema/tx
           http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
           http://www.springframework.org/schema/aop


   http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context-2.5.xsd">

    <context:component-scan base-package="com.abc.trade.util"/> 
      <context:component-scan base-package="com.abc.trade.service"/>

       <!-- Hibernate Configuration -->
       <bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">    

                <property name="annotatedClasses">      
                    <list>
          <value>com.abc.trade.model.Order</value>  
          <value>com.abc.trade.model.Profile</value> 
          <value>com.abc.trade.model.Log</value>                
                    </list>    
                </property>  
           </bean>

            <tx:annotation-driven/> 

           <bean id="transactionManager" 
               class="org.springframework.orm.hibernate3.HibernateTransactionManager">
                <property name="sessionFactory" ref="sessionFactory"/>
          </bean>

           <bean id="commonService" class="com.abc.trade.framework.service.CommonServiceImplementor">
                <property name="commonDao" ref="commonDao"/>
           </bean>

           <bean id="commonDao" class="com.abc.trade.framework.dao.HibernateDAO">
            <property name="sessionFactory"><ref local="sessionFactory"/></property>

           </bean>

            <bean id="configService" class="com.abc.trade.service.ConfigServiceImplementor" parent="commonService">
           </bean>

           <import resource="../context/springws-servlet.xml"/>
     </beans>

Another XML is:(Springmvc-servlet.xml)

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:webflow="http://www.springframework.org/schema/webflow-config"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/webflow-config
        http://www.springframework.org/schema/webflow-config/spring-webflow-config-2.0.xsd">

   <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
       <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/> 
        <property name="prefix" value="/jsp/"/>
         <property name="suffix" value=".jsp"/>
    </bean>


     <context:component-scan base-package="com.abc.trade.controller" />   
     <context:component-scan base-package="com.abc.trade.util"/>


     <bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
        <property name="basename" value="messages" />
    </bean>

     <!-- Exception Resolver -->
     <bean id="exceptionResolver"
    class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
        <property name="exceptionMappings">
            <props>
                <prop key="com.abc.trade.framework.exception.DataAccessException">
                errorPage</prop>
                <prop key="java.sql.SQLException">errorPage</prop>
                <prop key="java.lang.Exception">errorPage</prop> 
            </props>
        </property>
    </bean>   

</beans>

Thank you in advance.

ConfigService:

package com.abc.trade.service;
import org.springframework.stereotype.Service;
import com.abc.trade.framework.exception.DataAccessException;

public interface ConfigService {

        public void addMessage(String message) throws DataAccessException;
}

Config Service Implementor:

package com.abc.trade.service;

import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.abc.trade.framework.exception.DataAccessException;
import com.abc.trade.framework.service.CommonServiceImplementor;
import com.abc.trade.model.Log;
import com.abc.trade.model.Mode;
import com.abc.trade.util.StockTraderLogger;

@Service("configService")
public class ConfigServiceImplementor extends CommonServiceImplementor implements ConfigService{

    String errorMessage = "";

    @Override
    public void addMessage(String message) {
        System.out.println("in add message of service...........");
        Log log = new Log();
        try{
            log.setMessage(message);
            System.out.println("Message is: "+message);
            int i=save(log);
        }catch(Exception e)
        {
            errorMessage = "Error in saving debug message";
            e.printStackTrace();
            //throw new DataAccessException(errorMessage);
        }

    }

}

Upvotes: 7

Views: 30038

Answers (4)

Prasad
Prasad

Reputation: 3795

Here the problem is in debug method:

    StockTraderLogger stl =new StockTraderLogger();

This is not spring managed. You can inject Spring managed bean into non-managed one in two ways. Here you can inject configService in StockTraderLogger as:

1) By AutowireCapableBeanFactory:

    ApplicationContext ctx = new ClassPathXmlApplicationContext("beansdefinition.xml");
    StockTraderLogger stl = new StockTraderLogger();
    ctx.getAutowireCapableBeanFactory().autowireBeanProperties(stl, AutowireCapableBeanFactory.AUTOWIRE_BY_TYPE, true);

2) By using Spring AOP @Configurable annotation which marks a class as eligible for Spring-driven configuration(like objects instantiated with the 'new' operator).

    @Configurable
    public class StockTraderLogger {
    ...
    }

and specifying this <context:spring-configured/> in beansdefinition.xml.

You can find more information about this spring aop way here.

Upvotes: 3

Rahul
Rahul

Reputation: 1189

Add this to applicationContext.xml:

xmlns:mvc="http://www.springframework.org/schema/mvc"

and

http://www.springframework.org/schema/mvc to xsi:schemalocation

mvc-annotation driven is required for annotated controllers and other features:

<mvc:annotation-driven />

Upvotes: 2

Erhan Bagdemir
Erhan Bagdemir

Reputation: 5327

StockTraderLogger is not declared as spring bean and doesn't exist in spring context and for that reason the injection won't work.

<bean id="StockTraderLogger" class="com.abc.trade.util.StockTraderLogger"/>

or

@Component
public class StockTraderLogger { /**/ }

Upvotes: 8

danny.lesnik
danny.lesnik

Reputation: 18639

I think you are missing 

<context:annotation-config />

Also make sure that your ConfigService class has 

@Service("configService")

Annotation, it will make this class candidate for autowiring.

and of cause you should use 

<context:component-scan base-package="package" />

for the ConfigService package name.

Upvotes: 1

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