activemq-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Andreas Gies <>
Subject Re: Who will receive messages first virtual topic subscriber or logical queue consumer?
Date Mon, 29 Sep 2014 12:01:15 GMT

I would dare to say thats fairly unpredictable.

If you are relying on the order in which multiple recipients of a topic 
recieve a particular message,
then you should reconsider your appliaction design with respect to the 
message flow.

In a nutshell, you can consider each virtual destination as a subscriber 
group. Upon Sending a
message into a topic each subscriber AND each subscriber group will 
consume an instance of
that message. Within each group you should not try to predict which 
group member should
receive the message and across groups and normal subscribers you 
shouldn't try to predict
the order in which the messages are dispatched to those.

This having said - if you combine virtual destinations with message 
groups you can make
a group of messages stick to one group member. Again - the first message 
of a group will
be consumed by a random member and the other messages of the group will 
If you are using groups, don't forget to terminate message groups, 
otherwise you might lose
the load balancing effect of a subscriber group.

My 2 ct

On 29/09/14 13:36, bansalp wrote:
> Hi,
> I am trying to use virtual topic and am unable to find answer to this
> question, Can anybody help?
> *Question*: I am sending to topic "VirtualTopic.Test" and have a logical
> Queue "Consumer.A.VirtualTopic.Test". I have a subscriber (A) to topic and a
> consumer (B) to physical queue corresponding to logical queue
> ("Consumer.A.VirtualTopic.Test"), among them (A and B) who will receive
> message first A or B?
> Thanks,
> Pradeep
> --
> View this message in context:
> Sent from the ActiveMQ - User mailing list archive at


    Andreas Gies

WoQ -- Way of Quality GmbH

Geschäftsführer & CTO

/eMail:/ <>

/Tel:/ +49 151 23470823

/Fax:/ +49 1805 006534 2114

/Twitter:/ andreasgies /Skype:/ giessonic

/LinkedIn:/ <> 

/Xing:/ <> 

/Blog:/ <> 

/Github:/ <> (

/Amtsgericht Landshut:/HRB 8352//


/Ust.-Id.:/ DE274771254


Diese Email kann vertrauliche und/oder rechtlich geschützte 
Informationen enthalten und ist ausschließlich für den/die benannten 
Adressaten bestimmt. Sollten Sie nicht der beabsichtigte Empfänger sein 
oder diese Email irrtümlich erhalten haben, ist es Ihnen nicht gestattet 
diese Mail oder einen Teil davon ohne unsere Erlaubnis zu verbreiten, zu 
kopieren, unbefugt weiterzuleiten oder zu behalten. Informieren Sie 
bitte sofort den Absender telefonisch oder per Email und löschen Sie 
diese Email und alle Kopien aus Ihrem System. Wir haften nicht für die 
Unversehrtheit von Emails, nachdem sie unseren Einflussbereich verlassen 


This email may contain confidential and/or privileged information and is 
intended solely for the attention and use of the named addressee(s). If 
you are not the intended recipient, or a person responsible for 
delivering it to the intended recipient, you are not authorized to and 
must not disclose, copy, distribute, or retain this message or any part 
of it without our authority. Please contact the sender by call or reply 
email immediately and destroy all copies and the original message. We 
are not responsible for the integrity of emails after they have left our 
sphere of control.


  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message