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https://issues.apache.org/activemq/browse/AMQ-1747?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=48139#action_48139
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Dan Bucatanschi commented on AMQ-1747:
--------------------------------------

Hi! I am writing a custom authorization and authentication plugin for the lab 
where I am working. Because I still do not fully understand what happens behind 
the scenes in ActiveMQ, I usually browse the ActiveMQ source code and the 
latest snapshots so that I can keep our security plugin up to date with the 
latest patches that the AuthorizationBroker gets here. So looking here, I saw 
this patch for this issue. I was just wondering if instead of:

return existing;

inside the if statement (looking at the diff with the previous version of the 
AuthorizationBroker.java), one should write:

return super.addDestination(context, destination);

just like it is at the end of the addDestination method in AuthorizationBroker. 
It makes sense to me to do that since we're not just trying to add a user to an 
already existing destination, but we should also "announce" this addition 
throughout the whole BrokerFilter stack, shouldn't we? This way, for example, 
Advisory topics also get updated with the fact that this user tried adding this 
destination for herself. I assume that other BrokerFilters rely on this 
behavior (that addDestination() gets called for every user requesting a 
destination successfully).

Or do I have this totally wrong and the addDestination method should only be 
used for adding destinations inside the broker, not to a user's connection? If 
that's the case, why is it that the issue described here appeared in the first 
place? Isn't the broker trying to create a destination (i.e. addDestination 
gets called) automatically for every new user requesting it?

Thanks,
-Dan


> Writing to predefined destinations without admin priviledges
> ------------------------------------------------------------
>
>                 Key: AMQ-1747
>                 URL: https://issues.apache.org/activemq/browse/AMQ-1747
>             Project: ActiveMQ
>          Issue Type: Bug
>    Affects Versions: 5.1.0
>            Reporter: Dejan Bosanac
>            Assignee: Rob Davies
>             Fix For: 5.2.0
>
>         Attachments: activemq-predefined.patch
>
>
> Trying to write to predefined destinations without admin privileges raises 
> "cannot create destination" exception. More info could be foundin the 
> folllowinf thread - 
> http://www.nabble.com/Secutiry-and-Predefined-Destinations-tt17370190s2354.html

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