JMS MessageProducer.send Async

This is a non-Spring related question. Does JMS, by its default spec, support asynchronous sending of a message from a client? In other words, when I perform the following in my client code:

Code:

---

MessageProducer prod = session.createProducer(topic);
            prod.send(someObject);

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Does my client have to wait for that prod.send(someObject); call to return from the server for me to move on with my execution? I understand that many messaging servers, such as ActiveMQ, support async mode of a message production. However, I am just wondering whether the JMS spec itself support such a message production mode.