Re: Is it possible to generate message-id before sending the JMS message?

2011-09-26 Thread Jason Whaley
Why do that instead of having an idempotent consumer taking messages off of the queue? In the comments from a similar question on stackoverflow.com, Rob Davies suggests also just using a well defined header/property for this purpose:

Re: Is it possible to generate message-id before sending the JMS message?

2011-09-24 Thread kaustubh khasnis
Because in that way we can use activeMQ's built in duplicate detection. --Kaustubh On Fri, Sep 23, 2011 at 7:46 PM, Jason Whaley jasonwha...@gmail.com wrote: Agreed with Gary's question here... why not use your database to generate a unique ID for each record and then shove that ID in to a

Re: Is it possible to generate message-id before sending the JMS message?

2011-09-23 Thread kaustubh khasnis
Please correct me if I am wrong, but in same onSend method one could override the messageId as well right? We also planning to use same, are there any ill-effects of that? Thanks and regards Kaustubh On Thu, Sep 22, 2011 at 11:49 PM, Martin C. mart...@gmx.at wrote: Hi, ok I see, but this is

Re: Is it possible to generate message-id before sending the JMS message?

2011-09-23 Thread Gary Tully
be careful, you need to retain the uniqueness constraints of the component attributes of a message id. have a peek at how the message id is generated so that you can understand the intent of each component. Why do you want to override the messageId? On 23 September 2011 14:19, kaustubh khasnis

Re: Is it possible to generate message-id before sending the JMS message?

2011-09-23 Thread Jason Whaley
Agreed with Gary's question here... why not use your database to generate a unique ID for each record and then shove that ID in to a property with an application specific name on the JMS message? On Sep 23, 2011, at 8:08 AM, Gary Tully wrote: be careful, you need to retain the uniqueness

Is it possible to generate message-id before sending the JMS message?

2011-09-22 Thread Martin C.
Hi, I'd like to know the message ID of a message I am going to send before actually sending it. Is this possible? Reason is that I want to delay sending the JMS messages until my database transaction has been comitted, but I already want to record the message IDs as correlation IDs in exactly

Re: Is it possible to generate message-id before sending the JMS message?

2011-09-22 Thread Gary Tully
you would need to pass use your own message impl that extends ActiveMQMessage and override org.apache.activemq.command.ActiveMQMessage#onSend on that callback, you will have the messageId and be able to commit the db transaction. On return from that method the message will be sent. be sure and

Re: Is it possible to generate message-id before sending the JMS message?

2011-09-22 Thread Martin C.
Hi, ok I see, but this is only possible if sending is done directly before committing the database transaction. It wouldn't work so well if sending was done somewhere during the process. I had hoped that I could feed something along a UUID as the message ID and it would be used then, but I can