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From Claus Ibsen <claus.ib...@gmail.com>
Subject Re: MinaConfiguration codec property
Date Thu, 05 Mar 2009 09:35:24 GMT
On Thu, Mar 5, 2009 at 10:31 AM, Willem Jiang <willem.jiang@gmail.com> wrote:
> Hi
>
> Since the myMinaEndpoint is created by the myMinaFactory which has not
> the reference from the application context which can be referred by the
> camelContext .
> So the myMinaEndpoint can't get find the instance of "myCodec".
>
> My suggestion is adding a constructor-arg of the camel context under the
> <bean id="myMinaFactory" ...
> to let the myMinaFactory hold the reference of camelContext.
Yes I am adding it right now

    <bean id="myMinaEndpoint"
          factory-bean="myMinaFactory"
          factory-method="createEndpoint">
        <constructor-arg index="0" ref="myCamel"/>
        <constructor-arg index="1" ref="myMinaConfig"/>
    </bean>


>
> Willem
>
>
> Nicolas Bouillon wrote:
>> Hi,
>>
>> i've got an error when trying to create my mina endpoint with spring dsl :
>>
>>       <bean id="myCodec" class="com.example.MyProtocolCodecFactory">
>>       </bean>
>>
>>       <bean id="myMinaFactory"
>> class="org.apache.camel.component.mina.MinaComponent"/>
>>
>>       <bean id="myMinaEndpoint"
>>             factory-bean="myMinaFactory"
>>             factory-method="createEndpoint">
>>           <constructor-arg index="0" ref="myMinaConfig"/>
>>       </bean>
>>
>>       <bean id="myMinaConfig"
>> class="org.apache.camel.component.mina.MinaConfiguration">
>>               <property name="protocol" value="tcp" />
>>               <property name="host" value="localhost" />
>>               <property name="port" value="7777" />
>>               <property name="sync" value="true" />
>>               <property name="codec" value="myCodec" />
>>       </bean>
>>
>> I got the following error :
>> org.springframework.beans.factory.BeanCreationException: Error
>> creating bean with name 'myMinaEndpoint' defined in class path
>> resource [spring.xml]: Instantiation of bean failed; nested exception
>> is org.springframework.beans.factory.BeanDefinitionStoreException:
>> Factory method [public org.apache.camel.Endpoint
>> org.apache.camel.component.mina.MinaComponent.createEndpoint(org.apache.camel.component.mina.MinaConfiguration)
>> throws java.lang.Exception] threw exception; nested exception is
>> java.lang.NullPointerException
>>       at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:444)
>>       at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:903)
>>       at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:817)
>>       at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:440)
>>       at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)
>>       at java.security.AccessController.doPrivileged(Native Method)
>>       at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)
>>       at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264)
>>       at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
>>       at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261)
>>       at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)
>>       at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
>>       at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:429)
>>       at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:728)
>>       at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:380)
>>       at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
>>       at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
>>       at com.example.main(App.java:15)
>> Caused by: org.springframework.beans.factory.BeanDefinitionStoreException:
>> Factory method [public org.apache.camel.Endpoint
>> org.apache.camel.component.mina.MinaComponent.createEndpoint(org.apache.camel.component.mina.MinaConfiguration)
>> throws java.lang.Exception] threw exception; nested exception is
>> java.lang.NullPointerException
>>       at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:127)
>>       at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:435)
>>       ... 17 more
>> Caused by: java.lang.NullPointerException
>>       at org.apache.camel.util.CamelContextHelper.lookup(CamelContextHelper.java:152)
>>       at org.apache.camel.util.CamelContextHelper.mandatoryLookup(CamelContextHelper.java:170)
>>       at org.apache.camel.impl.DefaultComponent.mandatoryLookup(DefaultComponent.java:315)
>>       at org.apache.camel.component.mina.MinaComponent.getCodecFactory(MinaComponent.java:360)
>>       at org.apache.camel.component.mina.MinaComponent.configureCodecFactory(MinaComponent.java:213)
>>       at org.apache.camel.component.mina.MinaComponent.createSocketEndpoint(MinaComponent.java:175)
>>       at org.apache.camel.component.mina.MinaComponent.createEndpoint(MinaComponent.java:109)
>>       at org.apache.camel.component.mina.MinaComponent.createEndpoint(MinaComponent.java:101)
>>       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>       at java.lang.reflect.Method.invoke(Method.java:597)
>>       at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:115)
>>       ... 18 more
>>
>> if i remove the property "codec", it works. I believe it's because the
>> "myCodec" bean is not already created. It is reference as a spring
>> value, not as a bean reference. But i tried to add depends-on but it
>> doesn't work.
>> <bean depends-on="myCodec" id="myMinaConfig"  ...
>>
>> Regards.
>> NicolaS.
>>
>
>



-- 
Claus Ibsen
Apache Camel Committer

Open Source Integration: http://fusesource.com
Blog: http://davsclaus.blogspot.com/

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