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POActivemq how to configure a consumer listener (in Java)
 

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  1. POActivemq how to configure a consumer listener (in Java)
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    <p>I would be happy on the condition that anyone share a simple sample for xml based configuration of consumer listener in Spring. Thanks in advance.</p> <p><strong>EDIT;</strong></p> <p><em>I just would like to hear about the listener of consumer, not the consumer implementation because I have already implemented an active-mq in my app. and it is running well, however I cannot be sure the order of consuming items which are send by producer synchronously. The problem is the inconsistency and data manipulation due to async executions of a method (persisting some objects to db in order to log them) from concurrent consumers at a time.</em></p> <p><strong>EDIT2:</strong> Let me clarify this complexity. I have an application that consist of two base separate parts. The first one is the synchronously executing Producer that asks db for the products newly come, and then "one by one" send them thorough the "jmsTemplate.send" method provided by active-mq. This was the operation which is synchronously executed from a Cron/Timer. In other words, producer is being executed from a timer/cron. Now The problem is consumer itself. When producer sends products "one by one", async consumers (with concurrency enabled) receive the products and consume them asynchronously. </p> <p>The problem begins here. Because the method, which is executed from the consumer when the products are just received, does some db persistence operations. When the same product is being received by separate concurrent consumers (it happens because of our system, not a jms issue, dont pay attention on this point) then doing the same persistence operations on the same entity occurs some exceptions as easy to predict. How can I prevent this async operations of products or manage the orders of comsuming products in that kind of application.</p> <p>Thanks.</p>
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    1. COthis part --> however I cannot be sure the order of consuming items which are send by producer synchronously. The problem is the inconsistency and data manipulation due to async executions of a method (persisting some objects to db in order to log them) from concurrent consumers at a time.<-- Is really complicated, could elaborate a bit of exactly what is happening in your system and where the problem is?
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    2. COPlease check my edited question again above.. Thanks a lot..
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