Question

对于使用JNDI和Spring

的Camel Context，我有一个很好的XML配置

稍后Solace.JndiObjectFactoryBean被用作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（）我得到一个编译时异常：

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，我收到运行时错误

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)

我相信在课程路径中有必要的罐子。 sol-common-x.y.z.jar，sol-jcsmp-x.y.z.jar，sol-jms-x.y.z.jar

Answer 1

JndiObjectFactoryBean无法投放到ConnectionFactory。

有两种选择：

在JndiObjectFactoryBean.getObject()方法返回的JndiObjectFactoryBean中使用getJndiObjectFactoryBean()。
让Spring提供ConnectionFactory。

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

Answer 2

当将一个有效的Spring XML配置（由Apache Camel用于从Weblogic JMS服务器队列读取）移植到Spring-Boot偏好的Java配置时，我们遇到了类似的情况。

jmsConfiguration.setConnectionFactory( (javax.jms.ConnectionFactory)getJndiFactoryBean().getObject());

上面的代码可以模仿

<bean id="jmsConfiguration" class="org.apache.camel.component.jms.JmsConfiguration">
    <property name="connectionFactory" ref="jndiFactoryBean"/>
    <property name="destinationResolver" ref="jndiDestinationResolver"/>
</bean>

（不清楚Spring XML在封面下做了多少额外的事情，因为它并不像在jndiFactoryBean上设置jmsConfiguration那么简单

Answer 3

如果您使用getObject（）方法，请确保在使用getObject（）之前调用afterPropertiesSet（）

def get_sorted_items():
  return Item.objects.all().annotate(
      first=Attribute.objects.filter(key='first').values('value'),
      second=Attribute.objects.filter(key='second').values('value'),
  ).order_by('first', 'second')

错误将Spring的JndiObjectFactoryBean转换为Solace-MQ JMS的ConnectionFactory

3 个答案: