How is it possible to show asynchronous communication in UML class diagrams

[Ravi Kiran Va]

Hi ,
I am working on class diagrams to show an asynchronous flow

The flow is such a way that for every request fired , it will create a Object Message and puts it on a Queue .
My question is How Is it possible to represent MessageDrivenBeans acting on a Queue in class diagrams .

Please advise . Thanks

Awaiting for your response

[Joachim Rohde]

http://www.ibm.com/developerworks/rational/library/3101.html (read the paragraph "messages")

[Ravi Kiran Va]

Thanks .