How to use JMS Message Transformation in ActiveMQ with Stomp/JSON

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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'.


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

🤰 How to use JMS Message Transformation in ActiveMQ using , 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� The transformation message header on SEND and SUBSCRIBE messages could be used to instruct ActiveMQ to transform messages from text to the format of your desire. Currently, ActiveMQ comes with a transformer that can transform XML/JSON text to Java objects, but you can add your own transformers as well.


The only format accepted by the transformation jms-map-json or jms-object-json is a simple Map format, which in JSON is:

{"map" : 
  {"entry" : 
    [ 
      { "string1": [ "key1", "value1" ] },
      { "string2": [ "key2", "value2" ] }
    ]
  }
}

This is the same format shown in the discussion forum. This format represents a name/value pair map object in java.

Selectors are only usable on Properties and Headers.

Stomp - ActiveMQ, you can use any JSON notation for jms-object-json conversions if XStream can handle it. You can see sample tests for some examples. There we use the� Objectmessage with transformation=jms-json and JSON content sent from my Delphi STOMP client will be received by the same client again correctly with the message in JSON format. So it looks like the broker does not need a matching Java class always.


It should be mentioned that ActiveMQ version must at least 5.8, because with 5.6 version I had problem when transformation just did not work.

Apache ActiveMQ ™ -- Stomp, If in Stomp world you use /queue/foo/bar then in a JMS world the queue Currently, ActiveMQ comes with a transformer that can transform XML/JSON text to� org.apache.activemq.command.ActiveMQTextMessage cannot be cast to javax.jms.ObjectMessage. I have read this page from activeMQ which says that . Currently, ActiveMQ comes with a transformer that can transform XML/JSON text to Java objects, but you can add your own transformers as well. I didn't quite understand this part on how to convert data.


[PDF] ActiveMQ Artemis Documentation, If in Stomp world you use /queue/foo/bar then in a JMS world the queue Currently, ActiveMQ comes with a transformer that can transform XML/JSON text to� ActiveMQ Object Message to json transformation not working. Hi, I am having trouble sending a custom Object Message to a STOMP consumer with ActiveMQ v5.11.1 In Jconsole, I can see messages being


JMS is a very popular API and is implemented by most messaging systems. JMS is only available to Please see Stomp for using STOMP with Apache ActiveMQ Artemis. AMQP forward certain messages, and transformation can also be hooked in. Apache returned as a JSON String rather than Java Serialization ( the. Mapping of REST to JMS. To publish a message use a HTTP POST. To consume a message use HTTP DELETE or GET. ActiveMQ has a Servlet that takes care of the integration between HTTP and the ActiveMQ dispatcher. NOTE: The example below requires servlet mapping on the URL. For posting without the servlet mapping, see examples further down.


ActiveMQ has several extensions to the Stomp protocol, so that JMS semantics can be supported by Stomp clients. An OpenWire JMS producer can send messages to a Stomp consumer, and a Stomp producer can send messages to an OpenWire JMS consumer. And Stomp to Stomp configurations, can use the richer JMS message control. Stomp supports the following standard JMS properties on SENT messages: