@Autowired dependency injection

[bijayab02]

I have a file TradeIdeaServiceImpl.java where I have

@Autowired
protected TradeIdeaDAO tradeIdeaDAO;


and then I have a method createIdea() where there is
tradeIdeaDAO.closeIdea()


Now I have one more file Save2Database.java where I have
@Autowired
protected TradeIdeaService tradeIdeaService;

and then there is a method

tradeIdeaService.closeIdea(),


Now, I am trying to implement bean configuration for this @autowiring, I have appConfig.xml


<context:annotation-config />
<bean id="tradeIdeaDAO" class="clink.tide.service.idea.TradeIdeaDAOImpl"/>
<bean id="tradeIdeaService" class="clink.tide.service.idea.TradeIdeaServiceImp l"/>

when i try to run its giving me error


org.springframework.beans.factory.BeanCreationExce ption: Error creating bean with name 'tradeIdeaService': Autowiring of fields failed; nested exception is org.springframework.beans.factory.BeanCreationExce ption: Could not autowire field: protected clink.tide.service.idea.TradeIdeaDAO clink.tide.service.idea.TradeIdeaServiceImpl.trade IdeaDAO; nested exception is org.springframework.beans.factory.NoSuchBeanDefini tionException: No unique bean of type [clink.tide.service.idea.TradeIdeaDAO] is defined: expected single matching bean but found 2: [tradeIdeaDAO, tradeIdeaDAOImpl]

Can somebody help me out in configuring the beans properly.

[gokulnanthakumar]

@Autowire injects the beans based on the type, if more than one bean of the same type found, it throws this exception.

use @Resource to inject based on the bean name, if you really want to have more than one instance of the same bean type

[gmateo]

Hi bijayab02,
In order to force autowire work as wiring byName you can use the following:
@Autowired
@Qualifier("tradeIdeaDAO")
protected TradeIdeaDAO tradeIdeaDAO;

I hope that this solve your problem.
Regards