I have below requirement:
Route 1: from(timer:foo?repeatcount=1).recepientList("rest service")
Route 2: from(sourcequeue).process(new myprocessor()).to(destinationqueue)
Need to use the json response from route 1 and pass it to Route 2 processor.
My problem is whenever i set the json response in exchange property and try to use in Route 2 processor it is null.
Any suggestion on how to pass the exchange property between these routes would be of great help.
Thanks in advance.
The reason you cannot use Exchange properties to pass information between routes is that they are not part of the message.
Take a look at this picture of the Camel Exchange model.
When a message is received by Camel, it embeds it into an Exchange and the Exchange is passed through the route. But when you send a message (.to(...)), only the message is sent.
Therefore you have to use (as answered by Thomas) the message body or a message header.
If you use http camel component, the http response should be in the body. You can load it from your processor.
String json = exchange.getIn().getBody(String.class);
from(timer:foo?repeatcount=1).recepientList("http://rest_service")
.to(direct:sourcequeue)
You can also use headers to pass data throw your route.
from(timer:foo?repeatcount=1).recepientList("http://rest_service")
.setHeader(“myJsonResponse”, simple("${body}"))
.to(direct:sourcequeue)
String json = exchange.getIn().getHeader(“myJsonResponse”, String.class);