Correlation Id generation strategy?

[gemini929]

Hello,

I need to call two different systems and aggregate their responses. To do so, I plan on using SI's aggregator functionality. It looks like the easiest way is to add a correlationId to each message so that I can aggregate the responses when I get them back.

Any suggestions for generating a correlation id?

[oleg.zhurakousky]

There is something that makes the two calls to two different system related. For example; I want to make a call to Public Record system and Private Record system to get a complete record for the customer with id 12345. So the '12345' is a good candidate to be a correlation id.