The Invoke component allows invoking methods defined in Java classes from Mule flows. To use it, a Java class with the methods must be created and configured as a Spring bean. The component calls the method based on its name and the number of arguments passed. The document then provides steps to create a sample Java class with methods, configure it as a Spring bean, and make a call to the method from a Mule flow to return a response.

1. INVOKE COMPONENT DEMO IN MULE
The Invoke component invokes a method of an object
defined in a Spring bean. You can provide an array of
argument expressions to map the message to the
method arguments. Mule determines which method to
use via the method name, along with the number of
argument expressions provided.

2. Configuring the Java Class
• Use the Invoke component when you have an existing
method defined in custom Java code that you wish to use
in processing a message.
• Create a new Mule project. Click File > New > Mule
Project and name the project demo.
• Create a new Java class. In Package Explorer, right-
click src/main/java and click New > Class.

3. Http configuration and global element

4. Create mule flow like below

5. Invoke component configuration

6. Create a class src/main/java

7. Name the class InvokeDemo.

8. Create java class like below

9. Class here
• package invokedemo;
• public class InvokeDemo {
• public String starCall(String name) {
• return String.format("Hello %s!", name);
• }
• public String endCall(String name) {
• return String.format("Goodbye %s!", name);
• }
• }

10. CreateYour Spring Bean
To reference your Java, Mule requires a Spring bean to declare the class path.
Click on global element and create Bean like below

11. Run As Mule application
• And type this url on browser, we can get the following
result
• http://localhost:8081/call?name=krishna
• Hello krishna!