How do I pass a parameter to a Java Component from a Mule flow?

Question

I'm just getting started with mule and cant figure out how I can possibly pass a part of my request header as a parameter/argument to the Java component. My Java Component is as follows ``` public String processHeader(String in) { //process header System.out.print(" Header" + in); } ``` Ive been able to access `processHeader` in the following manner from the flow ```

``` Accessing the above using `http://localhost:8080/test` . Prints `Header test` I'm able to dump the contents of the header using the following `` But I cant seem to figure out how to pass the `message` as an argument to `processHeader` nor can I find any relevant examples. Any help would be appreciated. Btw, I'm using `Mule 3.5` if that matters.

Accepted Answer

implement Callable interface for your java component. When default methods are overridden, you will get eventContext as parameter inside which you can find mule message which in turn gives you access to headers and payload. sample is here:

```
import org.mule.api.MuleEventContext;
import org.mule.api.lifecycle.Callable;
import org.mule.api.transport.PropertyScope;
public class Test implements Callable {

@Override
public Object onCall(MuleEventContext eventContext) throws Exception {
    eventContext.getMessage().getProperty("header1", PropertyScope.INBOUND);
    return null;
}
}
```

How do I pass a parameter to a Java Component from a Mule flow?

Solution

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