/**
* Deletes a topic, including all of its messages and TopicUsers
*
* @param topic The topic to delete
* @param userRequestingDeletion The user who requested the topic be deleted
* @throws AccessDeniedException
*/
public void deleteTopic(JMSTopic topic, JMSUser userRequestingDeletion)
throws AccessDeniedException {
if (userRequestingDeletion.equals(topic.getOwner())) {
// If the topic does not contain null fields
if (isValidTopic(topic)) {
try {
Transaction transaction = TransactionHelper.getTransaction(10000l);
space.takeIfExists(topic, transaction, 3000l);
deleteAllTopicUsers(topic, transaction);
MessageService.getMessageService().deleteAllTopicMessages(topic, transaction);
// Writes a JMSTopicDeleted object so listeners know the
// topic
// has been removed
space.write(new JMSTopicDeleted(topic), transaction, 1000l * 60l);
transaction.commit();
} catch (Exception e) {
e.printStackTrace();
}
} else {
System.err.println(
"Attempted to delete topic with on or more null fields. "
+ "Due to how JavaSpaces work, this will delete one at random and is not allowed.");
}
} else {
throw new AccessDeniedException("Only the topic's owner can delete the topic");
}
}
