Passing parameter to bean's method in camel blueprint - apache-camel

Question

I'm trying to call bean's public method by passing parameter .But i'm unable to run it.Here is my sample blueprint code(I have written from clause but here i'm pasting only necessary code)-
<bean id="ProcessorRef" class="com.healthedge.customer.THC.extractor.ProcessorClass">
<to uri="bean:ProcessorRef" />
Processor class-
public class ProcessorClass{
public String whatAmI(String str) {
return "I am "+str;
}
}
Now in above example how can I invoke whatAmI method with parameter from blueprint?TIA

Answer 1

You can do it by calling directly the method you want
<bean id="ProcessorRef" class="com.healthedge.customer.THC.extractor.ProcessorClass">
<bean ref="ProcessorRef" method="whatAmI('your_parameter_here')" />

Answer 2

If the value you want to pass to whatAmI method is in header, you can do like this.
<to uri="bean:ProcessorRef?method=whatAmI(${header.xyz})" />
If its a constant string, you can put the string directly in place of ${header.xyz}
Another option is to modify your whatAmI method to
public class ProcessorClass{
public String whatAmI(Exchange exchange) {
// exchange has many methods, with which you can access headers and body.
}
}
In such a case you can write the route like this
<to uri="bean:ProcessorRef?method=whatAmI" />
Personally, I would prefer second option, because it gives you access to complete exchange object, which would have all the details.