正如Umapathy在选项3中所建议的那样，我们现在选择了使用Spring的CachingConnectionFactory的方法，即使对于非Spring应用程序，它也能很好地工作。您需要做的就是将Spring
Jars添加到类路径中，并用CachingConnectionFactory包装MQQueueConnectionFactory。

我们选择创建自己的Tomcat
QueueConnectionFactoryFactory，使我们能够完全保持原始应用程序代码不变，您只需要使用以下XML定义替换Tomcat配置文件（问题中所示）中的原始MQ连接工厂：

<Resource name="jms/XXXQCF" auth="Container"
          type="org.springframework.jms.connection.CachingConnectionFactory"
          factory="at.rsf4j.core.utilities.RSFCachingMQQueueConnectionFactoryFactory"
          description="JMS Queue Connection Factory"
          HOST="xxx.com" PORT="1429" CHAN="XXX" TRAN="1"
          QMGR="XXX" />

这是RSFCachingMQQueueConnectionFactoryFactory的（简化）代码（无错误检查）：

public class RSFCachingMQQueueConnectionFactoryFactory implements ObjectFactory{

public Object getObjectInstance (Object obj, Name name, Context nameCtx, Hashtable<?,?> environment)
    throws NamingException {
            Reference ref = (Reference) obj;
            String beanClassName = ref.getClassName();
            Class<?> beanClass = Class.forName(beanClassName);
            if (CachingConnectionFactory.class.isAssignableFrom(beanClass)){
                MQQueueConnectionFactoryFactory cff = new MQQueueConnectionFactoryFactory();
                Reference mqReference = new Reference(
                        MQQueueConnectionFactory.class.getName());

                Enumeration<RefAddr> allAddrs = ref.getAll();
                while (allAddrs.hasMoreElements()){
                    mqReference.add(allAddrs.nextElement());
                }

                MQQueueConnectionFactory cf = (MQQueueConnectionFactory)cff.getObjectInstance(mqReference, name, nameCtx, environment);
                CachingConnectionFactory ccf = (CachingConnectionFactory)beanClass.newInstance();
                ccf.setTargetConnectionFactory(cf);
                return ccf;
            }
        }