Mule groovy component entry point resolution failure - groovy

Question

I have a very simple Mule (3.x) flow:
<spring:bean name="messageHandler" class="mypackage.MessageHandler"/>
<flow name="main">
<vm:inbound-endpoint path="in" exchange-pattern="request-response"/>
<component>
<spring-object bean="messageHandler"/>
</component>
<vm:outbound-endpoint path="out"/>
</flow>
where messageHandler is a simple Groovy class:
class MessageHandler {
String handleMessage(String xml) {
return xml + " Received";
}
}
When I execute the test I get:
org.mule.model.resolvers.EntryPointNotFoundException: Failed to find entry point for component, the following resolvers tried but failed:[ ... ReflectionEntryPointResolver: Could not find entry point on: "mypackage.MessageHandler" with arguments: "{class java.lang.String}" ... ]
but when I use Java class it works!! (Also works with Callable interface on groovy class).
I'm using gmaven plugin for groovy compling:
<plugin>
<groupId>org.codehaus.gmaven</groupId>
<artifactId>gmaven-plugin</artifactId>
<extensions>true</extensions>
<inherited>true</inherited>
<executions>
<execution>
<goals>
<goal>generateStubs</goal>
<goal>compile</goal>
<goal>generateTestStubs</goal>
<goal>testCompile</goal>
</goals>
</execution>
</executions>
</plugin>
What could be the problem here?

Answer 1

Try adding the logger element in the flow before the component to see what's coming into the component.