On 15 June 2010 13:03, astlm <monica.astudi...@tic.alten.es> wrote: > > The first, thank you for the answer. > > > James.Strachan wrote: >> >> On 15 June 2010 07:54, astlm <monica.astudi...@tic.alten.es> wrote: >>> >>> I'm sorry but I did not understand how Resequencer work on, I have read >>> in >>> more detail how it works, and although not ideal, because only order a >>> number of messages or messages received over a period time, It can be a >>> solution. >> >> Thats how priority queues work too. How else can you know how long or >> how many messages to reorder? >> >> You are right. >> I was thought that every message recived to be placed in the correct >> position according to their priority, instead of waiting for a number of >> messages or to place, but I guess is that this is very hard and slow. >> >>> I think I have to define two queues, one for input and another oner for >>> output. >> >> Correct. It also lets you sort on much more fine grained things - >> including expressions which extract values from your message payload >> too if JMSPriority is not enough. >> >> >>> Is only necesary to define on broker.xml the Resequencer? >>> >>> <camelContext id="camel" xmlns="http://camel.apache.org/schema/spring";> >>> <route> >>> <from uri="input" /> >>> <resequence> >>> <simple>body</simple> >>> <to uri="output" /> >>> <batch-config batchSize="300" batchTimeout="4000" >>> allowDuplicates=true reverse=true /> >>> </resequence> >>> </route> >>> </camelContext> >>> >>> With these configuration, The producer connect with input queue and the >>> consumer with output queue. >> >> You can put the above XML into any spring XML in any JVM really; >> though feel free to use it in the broker's XML file. >> >> I use activemq 5.3.2 with camel 2.2.0, according to specification, >> allowDuplicates and reverse are available from the camel 2.4. >> http://camel.apache.org/resequencer.html >> Any activemq version have camel 2.4?
Yes - you can use newer Camel releases with older ActiveMQ releases typically. >> I tried download camel 2.4, but It´s not avalilable. >> http://camel.apache.org/download.html 2.4 isn't released yet I'm afraid - 2.3 is the most recent release. You can use 2.4-SNAPSHOT for now if you like. >> I have a resequencer by JMSPriority, but It doesn`t get reverse orden and >> It doesn´t allow duplicates. To reverse order you could use an expression like "100 - headers.JMSPriority" (it depends on which expression language you use with Camel - that would certainly work using bean expressions, javascript, XPath / XQuery, EL etc). Not 100% sure if simple language supports subtraction though. To remove duplicates you could use idempotent consumer before the resequencer to filter out duplicates... http://camel.apache.org/idempotent-consumer.html Though waiting for 2.4 might be easiest for you? -- James ------- http://macstrac.blogspot.com/ Open Source Integration http://fusesource.com/
