Hi The splitter has built in aggregation strategy, so I suggest to use that
eg its this pattern http://camel.apache.org/composed-message-processor.html See the example with only splitter, where you dont need the aggregator EIP On Wed, Jun 13, 2012 at 6:38 AM, Gordienko, Max <[email protected]>wrote: > > Hi, > > Is it possible to "aggregate" zero messages with aggregator? > Here is my case (simplified) tested with Camel 2.9.2 > > from("direct:from") > .split(body().tokenize("\n")) > .filter(body().isNotEqualTo("")) > .aggregate(constant(true), new > MyAggregationStrategy()).completionTimeout(1000) > .log(LoggingLevel.INFO, "compleated by > ${header.CamelAggregatedCompletedBy}").stop(); > > I get a file, split it into multiple lines, filter all blank lines, > aggregate it back. > If the file is empty or contains only blanks the .log line will never be > executed. > > Moreover if MyAggregationStrategy implements > TimeoutAwareAggregationStrategy the timeout() method is never called. > > By the way my case is equal to splitting input into zero elements > (imagine the input file is empty). > > What is the recommended approach to such scenarios? > > Thank you! > > "This e-mail and any attachments to it (the "Communication") is, unless > otherwise stated, confidential, may contain copyright material and is for > the use only of the intended recipient. If you receive the Communication in > error, please notify the sender immediately by return e-mail, delete the > Communication and the return e-mail, and do not read, copy, retransmit or > otherwise deal with it. Any views expressed in the Communication are those > of the individual sender only, unless expressly stated to be those of > Australia and New Zealand Banking Group Limited ABN 11 005 357 522, or any > of its related entities including ANZ National Bank Limited (together > "ANZ"). ANZ does not accept liability in connection with the integrity of > or errors in the Communication, computer virus, data corruption, > interference or delay arising from or in respect of the Communication." > -- Claus Ibsen ----------------- FuseSource Email: [email protected] Web: http://fusesource.com Twitter: davsclaus, fusenews Blog: http://davsclaus.com Author of Camel in Action: http://www.manning.com/ibsen
