apache-flex - MessageBroker 初始化期间引发的错误

Question

我正在测试一个使用 Flex、Spring、jBPM5、Drools 和 JPA 以及 Hibernate 的项目。在创建 FrameworkServlet 'Flex' 的初始化过程中，我遇到了 AMF 序列化和反序列化的问题。谁能帮我？

我的错误是：

[2011-06-14 16:01:52]|ERROR|org.springframework.flex.core.MessageBrokerFactoryBean|Error thrown during MessageBroker initialization

java.lang.IllegalArgumentException: Failed to create SpringPropertyProxy for org.drools.persistence.processinstance.ProcessInstanceInfo - Classes mapped for deserialization from AMF must have either a no-arg default constructor, or a constructor annotated with org.springframework.flex.core.io.AmfCreator