Dan, Each exchange executing within the split is independent of each other. Incrementing the value of a header on one split exchange will have no effect on another.
If you want to get the number of split items, it is available after the split in Exchange.CamelSplitSize header. In addition, take a look at the other headers available within the splitter component [1] documentation for more options available - Andy [1] - http://camel.apache.org/splitter.html -- Andrew Block On May 15, 2015 at 11:50:51 AM, Davis, Daniel (davi...@si.edu) wrote: From Claus' 2011 blog I tried to implement a counter but I cannot get it to work inside a splitter (I need a count of only a subset of items). The example code is: <setHeader header="myCounter"> <simple>${header.myCounter}++</simple> </setHeader> By itself this code fails because myCounter is not a number. So I initialized it outside the Split but inside the same route. <setHeader headerName="ImageIndex"> <simple resultType="java.lang.Integer">0</simple> </setHeader> No exceptions but it increments once and only once inside the split. So I simplified and removed the initialization. <setHeader headerName="ImageIndex"> <simple resultType="java.lang.Integer">${header.ImageIndex}++</simple> </setHeader> No exceptions but it also increments once and only once inside the split. It seems like it is grabbing the original header value off the exchange each time and incrementing it. Does anyone see what I am missing? Is split behavior in some way causing this? -- Dan Davis
