将Spring的JndiObjectFactoryBean强制转换为Solace-MQ JMS的ConnectionFactory时出错

问题描述

我对使用JNDI和Spring的Camel Context具有良好的XML配置.

I have a good working XML configuration for Camel Context that uses JNDI with Spring

后来的Solace.JndiObjectFactoryBean被用作connectionFactory

Later Solace.JndiObjectFactoryBean gets used as connectionFactory

<bean id="Solace.JmsComponent" class="  on">
    <property name="connectionFactory" ref="Solace.JndiObjectFactoryBean" />
    <property name="destinationResolver" ref="Solace.JndiDestinationResolver" />
</bean>

我正在尝试将其转换为从org.apache.camel.spring.javaconfig.CamelConfiguration扩展的Java类.但是有一个问题.当我尝试在JMS组件上设置连接工厂时 component.setConnectionFactory(getJndiObjectFactoryBean()); getJndiObjectFactoryBean()，我收到一个编译时异常:

I am trying to convert this into a Java class that extends from org.apache.camel.spring.javaconfig.CamelConfiguration. But there is one problem. When I try to set a connection factory on JMS component component.setConnectionFactory(getJndiObjectFactoryBean()); getJndiObjectFactoryBean(), I get a compile time exception :

The method setConnectionFactory(ConnectionFactory) in the type JmsComponent 
is not applicable for the arguments (JndiObjectFactoryBean)

但是当我尝试将从getJndiObjectFactoryBean返回的JndiObjectFactoryBean显式转换为SolConnectionFactory时，会出现运行时错误

But when I try to cast JndiObjectFactoryBean returned from getJndiObjectFactoryBean explicitly to SolConnectionFactory, I get a runtime error

016-02-05 17:39:09,234|[localhost-startStop-1]|[]|[]|[ERROR] web.context.ContextLoader [line:307] Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'getJMSConfiguration' defined in class path resource [com//camel
/CamelRoutesConfig.class]: Instantiation of bean failed; nested exception is org
.springframework.beans.factory.BeanDefinitionStoreException: Factory method [public org.apache.camel.component.jms.JmsConfiguration com.camel.CamelRoutesConfig.getJMSConfiguration()] threw exception; nested exception is java.lang.ClassCastException: org.springframework.jndi.JndiObjectFactoryBean$$EnhancerByCG
LIB$$18b94f95 cannot be cast to com.solacesystems.jms.SolConnectionFactory
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsi
ngFactoryMethod(ConstructorResolver.java:581)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory
.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1029)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory
.createBeanInstance(AbstractAutowireCapableBeanFactory.java:925)

我相信在类路径中确实有必要的jar. sol-common-x.y.z.jar，sol-jcsmp-x.y.z.jar，sol-jms-x.y.z.jar

I believe do have have requisite jars in the class path. sol-common-x.y.z.jar, sol-jcsmp-x.y.z.jar, sol-jms-x.y.z.jar

推荐答案

不能将JndiObjectFactoryBean强制转换为ConnectionFactory.

有两种选择:

1. 在getJndiObjectFactoryBean()方法返回的JndiObjectFactoryBean中使用JndiObjectFactoryBean.getObject().

2. 让Spring提供ConnectionFactory.

1. Use JndiObjectFactoryBean.getObject() in the JndiObjectFactoryBean that's returned by your getJndiObjectFactoryBean() method.

2. Get Spring to provide the ConnectionFactory.

ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("config.xml");ConnectionFactory connectionFactory = (ConnectionFactory) context.getBean("Solace.JndiObjectFactoryBean");

ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("config.xml");ConnectionFactory connectionFactory = (ConnectionFactory) context.getBean("Solace.JndiObjectFactoryBean");

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