SpringIntegration: Service-Activator not invoking method - no eligible methods error.

[jasper2000]

I want to read Message from a RabbitMQ Queue > Use Service-Activator to invoke a Service.
But following exception:
...
Caused by: java.lang.IllegalArgumentException: Target object of type [class org.springframework.integration.service.MessageExa miner] has no eligible methods for handling Messages.


The relevant config section is:

<int-amqp:inbound-channel-adapter channel="fromRabbit" queue-names="si.test.queue" mapped-request-headers="whatever" connection-factory="connectionFactory" />
    <int:service-activator input-channel="fromRabbit" output-channel="whatever"
               ref="msgService" method="checkMsg1"/>

     <bean id="msgService" class="com.whatever.MsgService"/>

The MsgService Class is:

public class MsgService{
//Does not work!
public void checkMsg1( @Payload String s) {
         System.out.println("The Payload is: " +s);      
     }

//Does not work!
public void checkMsg2( Message inboundMessage) {
     //...
}

Any ideas?

[Gary Russell]

Please use [ code ] .[ /code ] tags - no spaces inside brackets - around code and config.

Is the producer setting a content_type property on the message? Setting it to 'text/plain' will cause the payload to be a String; otherwise it will be a byte[].