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Posted to dev@activemq.apache.org by "Evan Kuhn (JIRA)" <ji...@apache.org> on 2010/07/26 19:47:52 UTC
[jira] Updated: (AMQCPP-306) CMS 3.2.1 - Trouble reading empty
strings from MapMessage fields
[ https://issues.apache.org/activemq/browse/AMQCPP-306?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Evan Kuhn updated AMQCPP-306:
-----------------------------
Attachment: send_empty_string.cpp
Attaching an example program that reproduces the exception thrown when reading an empty string from a MapMessage.
> CMS 3.2.1 - Trouble reading empty strings from MapMessage fields
> ----------------------------------------------------------------
>
> Key: AMQCPP-306
> URL: https://issues.apache.org/activemq/browse/AMQCPP-306
> Project: ActiveMQ C++ Client
> Issue Type: Bug
> Components: Example Code
> Affects Versions: 3.2.1
> Environment: - CMS 3.2.1 on Windows XP
> - ActiveMQ 5.3.0 and Java 1.6.0 on Red Hat Enterprise Linux Server release 5.3 (Tikanga)
> - Sending messages to a queue, using persistent messaging (via KahaDB)
> Reporter: Evan Kuhn
> Assignee: Timothy Bish
> Attachments: send_empty_string.cpp
>
>
> Hi,
> I just upgraded from ActiveMQ CMS 3.1.3 to 3.2.1, and I'm having some trouble reading
> empty strings out of MapMessage fields after sending them through the broker. When I
> try to do so, MapMessage::getString() throws the exception "Unsupported Type Conversion".
> To explain, here's what I do:
> - Open a connection with my ActiveMQ broker
> - Create a MapMessage. Set two string fields, one empty, one non-empty:
> - request->setString("STR_FIELD_1", "");
> - request->setString("STR_FIELD_2", "asdf");
> - Send the message to a queue
> - Read the message from the queue
> - Read the two string fields from the response:
> - response->getString("STR_FIELD_1", "");
> - response->getString("STR_FIELD_2", "asdf");
>
> Reading the non-empty string field works fine. Reading the empty one, however,
> results in the exception "Unsupported Type Conversion".
> Any idea why this is happening? I did not experience this with CMS 3.1.3.
> For reference, I'm using:
> - CMS 3.2.1 on Windows XP
> - ActiveMQ 5.3.0 and Java 1.6.0 on Red Hat Enterprise Linux Server release 5.3 (Tikanga)
> - Sending messages to a queue, using persistent messaging (via KahaDB)
> I'll post a small C++ program I'm using to reproduce the problem.
> Thank you very much for your help
> -- Evan Kuhn
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