This method is invoked only by Java code; when the garbage collector enqueues references it does so directly, without invoking this method.
true if this reference object was successfullyenqueued;
false if it was already enqueued or if it was not registered with a queue when it was created
session.getQueue().add(message); session.enqueued();@param message @exception IllegalStateException if this method is called on an invalidated session
nullif the command did not require an incomingdata transfer.