Hi all. This is a spinoff of a previous post: http://camel.465427.n5.nabble.com/Change-timer-runtime-td5738484.html
I decided to start a new thread, because I think this question is of a more general character. First of all, I ran into a problem regarding how to update a camel route runtime. My concrete problem is that I can't figure out how to update a sql query runtime. If I, for instance, want to have a query that fetches the first 3000 records of a table, on the first cycle of the camel route (let's say I use a timer to "fire" the route). In the next cycle, I want to fetch from record 3001 to 6000. I simply can't get my head around this problem, which is extremely simple in regular java. My conclusion from this is, that I have some fundamental misconceptions of what Apache camel is, and therefor I want to use this thread to discuss runtime altering of routes. For starters: As I understand, an Exchange is a entity that only exists within a single cycle of a route. This means that I can't use the Exchange object to save variables that I can use in the next cycle of the route. This further means that I can't use Exchange to alter configurations of a component - ex. I can't use it for giving the timer component a different period and I can't use it for altering variables in a sql query. Besides this, it seems that you can only write your route once, and the first time it's run, all component configurations are set - they cannot be altered from within the route it self. In my specific case, I have tried to put java variables into my sql query (having them assigned as class scoped attributes). In my route I have a Processor (see referenced thread at the top), and in that I have altered the java attributes. This seems to work fine, but the sql query doesn't get updated with the new value of my java variable. Furthermore, I haven't been able to find any good examples, that show how to alter the route configurations runtime (actually the configurations of each component in a route). Since I can't Google the problem away, I conclude that I have issues on the conceptual understanding of Camel. So, could someone please clarify how to understand runtime alterings of routes, and it would be even better if you have some concrete coding examples. I have chosen to use the java DSL approach instead of Spring. Best regards Lasse Vestergaard -- View this message in context: http://camel.465427.n5.nabble.com/Conceptual-understanding-of-altering-routes-runtime-tp5738697.html Sent from the Camel - Users mailing list archive at Nabble.com.
