Session aware for Queue

[mbryzhko]

There is question around session awareness for queue.

I would like to clarify if java sdk supports following scenario:
(Conditions: many clients and many services and one queue)

1. client sends a message to a service via queue
2. service receives it and process
3. then service replies to a client and sends response message via queue
4. client is listening for response. One it arrives, client processes it.

As far as I understand that this can be achieved with session aware queues.

A queue can be created with property setRequiresSession(true). Then a client specifies a session id for request message setSessionId(...). A Service should specify replay to session id property in response message setReplyToSessionId(...).

I though that this should guaranty that a client will receive that response message which was sent with corresponded session id from service.

But I can see different behavior in my application. That a message is delivered to any client .

Does this scenario not supported. Or I missed something to do? Any existing examples?

[jcookems]

Hi @mbryzhko ,

Session-aware queues are not supported by the Azure Service Bus SDK for Java.

This is because the Java SDK uses the Service Bus REST endpoints, (which are less functional than the WFC endpoints that the .NET SDK uses), and according to the Queue Description:

RequiresSession: True, False
... Session-aware queues are not supported through REST.

You could use Service Bus Topics and Subscriptions to emulate the behavior you are looking for.

1. Create a topic.
2. For each client, create a subscription on that topic. Add a rule for the subscription to only accepts messages for that client.
3. Service sends messages to the topic.
4. Each client polls its subscription for its messages.

See How to Use Service Bus Topics/Subscriptions for more details.

[mbryzhko]

Hello Jason

Thanks for your suggestion.

BTW, you can check how I could sort this issue out.
https://github.com/mbryzhko/json-rpc-over-asb.

I have implemented approach described here
http://www.rabbitmq.com/tutorials/tutorial-six-python.html

Maksym

On Wed, Feb 20, 2013 at 9:34 PM, Jason Cooke [Microsoft] <
notifications@github.com> wrote:

Hi @mbryzhko https://github.com/mbryzhko ,

Session-aware queues are not supported by the Azure Service Bus SDK for
Java.

This is because the Java SDK uses the Service Bus REST endpoints, (which
are less functional than the WFC endpoints that the .NET SDK uses), and
according to the Queue Descriptionhttp://msdn.microsoft.com/en-us/library/windowsazure/hh780773.aspx
:

RequiresSession: True, False
... Session-aware queues are not supported through REST.

You could use Service Bus Topics and Subscriptions to emulate the behavior
you are looking for.

1. Create a topic.
2. For each client, create a subscription on that topic. Add a rule
   for the subscription to only accepts messages for that client.
3. Service sends messages to the topic.
4. Each client polls its subscription for its messages.

See How to Use Service Bus Topics/Subscriptionshttp://www.windowsazure.com/en-us/develop/java/how-to-guides/service-bus-topics/for more details.

—
Reply to this email directly or view it on GitHubhttps://github.com//issues/246#issuecomment-13851556.

Thanks,
Maksym