15.4.6 Serializing Message-Driven Bean Methods The container serializes calls to each message-driven bean instance. Most containers will support many instances of a message-driven bean executing concurrently; however, each instance sees only a serialized sequence of method calls. Therefore, a message-driven bean does not have to be coded as reentrant. The container must serialize all the container-invoked callbacks (e.g., ejbRemove, ejbTimeout methods), and it must serialize these callbacks with the message listener method calls.
SCJP, SCJD, SCWCD, SCBCD, SCEA
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