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From "Thomas Krammer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMQCPP-502) Can't send to temporary queues created by name
Date Tue, 23 Jul 2013 16:36:48 GMT

    [ https://issues.apache.org/jira/browse/AMQCPP-502?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13716563#comment-13716563
] 

Thomas Krammer commented on AMQCPP-502:
---------------------------------------

Thanks for fixing this anyway.
                
> Can't send to temporary queues created by name
> ----------------------------------------------
>
>                 Key: AMQCPP-502
>                 URL: https://issues.apache.org/jira/browse/AMQCPP-502
>             Project: ActiveMQ C++ Client
>          Issue Type: New Feature
>          Components: CMS Impl
>    Affects Versions: 3.4.0
>         Environment: Windows Vista, Visual Studio 2005
>            Reporter: Thomas Krammer
>            Assignee: Timothy Bish
>            Priority: Minor
>             Fix For: 3.8.0
>
>         Attachments: activemq.patch
>
>
> I have a Java process and a C++ process communicating using ActiveMQ. For some messages
the C++ process will produce big results which are sent in chunks in separate ByteMessages
(very similar to ActiveMQInput/OutputStream). To receive these chunks the Java process generates
a temporary queue and sends the name of the queue (result of getQueueName) to the C++ process.
The C++ process then sends the ByteMessages to this temporary queue using this code:
>   std::string targetQueue = // get queue name sent by Java
>   session = connection->createSession(cms::Session::AUTO_ACKNOWLEDGE);
>   queue = session->createQueue(targetQueue);
>   producer = session->createProducer(queue);
>   producer->setDeliveryMode(cms::DeliveryMode::PERSISTENT);
>   while(fillBuffer()) {
>     std::auto_ptr<cms::BytesMessage> blockMessage(session->createBytesMessage());
>     blockMessage->writeBytes(reinterpret_cast<unsigned char *>(buffer), 0, bc);
>     producer->send(blockMessage.get());
>   }
> On the Java side I never receive the messages sent by C++ but I don't get any error from
the C++ code either. When I change the Java code to create a regular queue instead of a temporary
queue the code works fine.
> I had a look at the Java implementation of ActiveMQSession::createQueue and found that
they have a special case handling for temporary queues that is missing from the C++ code.
After adding this special case to the C++ implementation the code above works fine.

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