message-id STOMP

[cvasilak]

Hi there,

I am using hornetq 2.2.5.Final together with STOMP on a remote C client (using libstomp). I am trying to implement a request-reply mechanism using JMSMessageID and JMSCorrelationID mesage headers

I tried to use the message-id as the corellation-id on the C client but the message-id received though STOMP is

STOMP:

message-id: 102758

while  the JMSMessageID when printed on the producer is

JMS:

ba773850-24a3-11e1-b6fe-0017f2cd5c0a

The way I solved it using a custom property on the producer (through UIID java class) and using that property as the corellation-id on the C client. Worked flawlessly but I want to ask why is this mismatch of the message-id between JMS and STOMP?

Also I saw a UIID class on the hornetq libs org.hornetq.utils.UUID;  I used the java standard class java.util.UUID in my example but I am wondering if there is any difference?

Regards and keep rocking the messaging space!

[gaohoward]

Did you try getting "correlation-id" header from the stomp frame?

Howard

[cvasilak]

Hi Howard,

On the producer I *don't* set "setJMSCorrelationID" on the message. Only in the consumer, in my case the C client I set it to the JMSMessageID (in STOMP frame I thought it was the "message-id" header of the received message)

An excerpt from the C client but you can get the idea.

replyframe is the STOMP reply frame

reqframe is the STOMP request frame e.g. message received from server

apr_hash_set(replyframe.headers, "correlation-id", APR_HASH_KEY_STRING, apr_hash_get(reqframe->headers, "message-id", APR_HASH_KEY_STRING));

But the "message-id" differs from "JMSMessageID" of the message sent.

The way I solved is

On the producer I set the

message.setStringPoperty("UIID", java.util.UIID);

and replacing the C code with

  apr_hash_set(replyframe.headers, "correlation-id", APR_HASH_KEY_STRING, apr_hash_get(reqframe->headers, "UIID", APR_HASH_KEY_STRING));

But why the mismach on the message-id and the JMSMessageID on the received STOMP frame. Why they are not equal?

Am i missing sth?

Thanks

[gaohoward]

Hi,

"JMSMessageID" is not mapped to "message-id" in HornetQ stomp frames. "message-id" corresponds to the internal long type id for the message.

Currently hornetq doesn't try to copy "JMSMessageID" to the stomp frames so you can't get it from the received frames.

Howard

[cvasilak]

Thanks Howard for your reply

Regards