Camel - How I can define a errorHandler and can use includeRoutes? - apache-camel

Question

I define my routes in Subclasses and get them in one RouteBuilder together with includeRoutes(). Now I want to insert a default ErrorHandler but I get the Error Message:
errorHandler must be defined before any routes in the RouteBuilder
This is my Code:
public class defaultRoutes extends RouteBuilder {
public void configure() throws Exception {
errorHandler(deadLetterChannel("direct:deadLetter").maximumRedeliveries(3));
from("direct:deadLetter").id("deadLetter")
.errorHandler(defaultErrorHandler().disableRedelivery())
.log("${exception.stacktrace}")
.setHeader("ErrorMessage",simple("${exception}",String.class))
.setHeader("ErrorStacktrace",simple("${exception.stacktrace}",String.class))
.to("activemqWithoutTransactions:errors");
...
...
for(String Module: globalConfig.getLoadedModules()) {
...
includeRoutes(routes);
}
...
}
I had also test this:
public class defaultRoutes extends RouteBuilder {
public void configure() throws Exception {
RouteBuilder errorHandler = new RouteBuilder() {
public void configure() {
errorHandler(deadLetterChannel("direct:deadLetter").maximumRedeliveries(3));
from("direct:deadLetter").id("deadLetter")
.errorHandler(defaultErrorHandler().disableRedelivery())
.log("${exception.stacktrace}")
.setHeader("ErrorMessage",simple("${exception}",String.class))
.setHeader("ErrorStacktrace",simple("${exception.stacktrace}",String.class))
.to("activemqWithoutTransactions:errors");
}
};
includeRoutes(errorHandler);
...
...
for(String Module: globalConfig.getLoadedModules()) {
...
includeRoutes(routes);
}
...
}
But this throw also the same Error Message! What can I do, to get the ErrorHandler to work?
Thank you

Answer 1

I think your problem is described in the comments of the issue https://issues.apache.org/jira/browse/CAMEL-5612.
If you use a global scoped errorHandler you have to ensure that it should like the
following:
errorHandler
errorHandler
route
route
and not:
errorHandler
route
errorHandler
route
kind regards,
soilworker

Answer 2

Try removing the .errorHandler() line from your route:
from("direct:deadLetter").id("deadLetter")
.errorHandler(defaultErrorHandler().disableRedelivery()) // this is incorrect
.log("${exception.stacktrace}")
.setHeader("ErrorMessage",simple("${exception}",String.class))
.setHeader("ErrorStacktrace",simple("${exception.stacktrace}",String.class))
.to("activemqWithoutTransactions:errors");
Check this page for more usage examples on the Dead Letter Channel in Camel.