Question

I am sending messages in JSON format to an ActiveMQ server. I am trying to use JMS Transformation to transform the JSON encoded object into a true Java Object in hopes of being able to use selectors on the data inside.

Here is a link to the documentation on Stomp and Message Transformation. Here is a link to a discussion on the patch where someone shows an example of a legal JSON object

The format of the JSON objects I am sending (in pretty print) are similar to this:

 {    'msg': {       'flag1' : 'value1',       'flag2' : 'value2'    } } 

The messages arrive in the message queue, but with the transformation-error property set to ‘msg : msg’.

Answer 1

you can use any JSON notation for your jms-object-json transformations as long as XStream can handle it. You can take a look at test cases for some examples. There, we use SamplePojo class:

https://svn.apache.org/repos/asf/activemq/trunk/activemq-stomp/src/test/java/org/apache/activemq/transport/stomp/SamplePojo.java

which is properly annotated so it can be represented with the following JSON

{‘pojo’:{ ‘name’:’Dejan’, ‘city’:’Belgrade’ }}

You can try using the same approach for your classes.

Hope this helps, Dejan