Apache Camel中的动态路由器URI

Question

I'm following chapter 8 of "Camel in Action" book and testing with Dynamic router. I have defined two routes as below:

from("direct:start")
.dynamicRouter(method(DynamicRouterBean.class, "route"))
.log("dynamicRoute result = ${body}");

from("seda:a")
.log("In direct:a with message ${body}");

And in the DynamicRouterBean's route method, I have implemented route logic as follows:

public String route(String body, @Header(Exchange.SLIP_ENDPOINT) String previous) {
    System.out.println("Enter DynamicRouterBean, body=" + body + ", previous=" + previous);
    if (previous == null) {
        return "seda://a";
    } else if ("seda://a".equals(previous)) {
        return "language://simple:Bye ${body}";
    } else {
        // no more, so return null to indicate end of dynamic router
        return null;
    }
}

The code works as the book described... but the issue I recognized is that if I return endpoint URI without double slash "//" in the middle in the route method, the second condition to check previous equals "seda:a" will fail and so the dynamic route will stop there

if (previous == null) {
        return "seda:a";
    } else if ("seda:a".equals(previous)) {
        // This condition will not match... and it will return null
        return "language:simple:Bye ${body}";
    } else {
        // no more, so return null to indicate end of dynamic router
        return null;
    }

Is it a feature that Camel's DynamicRouter require the addition of "//" in the middle of the URI? I search around the book or the Camel official website but seem not mentioned about this... If yes, any reason behind this?

Answer 1

Yes endpoints in Camel are formatted as name://context-path?options eg with those double slashes. So if you compare then to as in the book.