esb mule passing the parameters to the method via http - esb

Question

I have a test method:
#Test
public void testHello_with_muleXmlConfig() throws Exception {
MuleClient client = new MuleClient("mule-config-test.xml");
client.getMuleContext().start();
MuleMessage result = client.send("http://127.0.0.1:8080/hello", "some data", null);
assertNotNull(result);
assertNull(result.getExceptionPayload());
assertFalse(result.getPayload() instanceof NullPayload);
assertEquals("hello", result.getPayloadAsString());
}
Here (client.send("http://127.0.0.1:8080/hello", "some data", null)), I'm passing the parameter/data = 'some data'.
And I have a class:
public class HelloWorld {
public String sayHello() {
return "hello";
}
}
which is exposed as spring bean in mule-config.xml:
<spring:bean id="helloWorld" class="org.mule.application.hello.HelloWorld"/>
<flow name="HelloWorld">
<inbound-endpoint address="http://127.0.0.1:8080/hello"/>
<invoke method="sayHello" object-ref="helloWorld"/>
</flow>
What I should do to pass the parameter 'hello' into the 'sayHello()' method. If just changing it to 'sayHello(String text)' - it will not work.

Answer 1

You need to add this to the invoke element:
methodArguments="#[message.getPayload()]" methodArgumentTypes="java.lang.String"

Answer 2

Not sure about how/if invoke works: I suggest you use component instead.
If you change your method to accept a String, like for example:
public String sayHello(final String text)
{
return "hello:" + text;
}
then you also need to use an object-to-string-transformer to deserialize the inbound input stream to a String:
<flow name="HelloWorld">
<inbound-endpoint address="http://127.0.0.1:8080/hello" />
<object-to-string-transformer />
<component>
<spring-object bean="helloWorld" />
</component>
</flow>

Answer 3

Try This :
add this in your flow :
<invoke object-ref="helloWorld" method="sayHello" methodArguments="#[message.inboundProperties.'http.query.params'.name]" doc:name="Invoke" />
and this is the invoked method :
public String sayHello(String name) {
return String.format("Hello %s!", name);
}