Mule 4: Hello World

Introduction

Many people are interested in learning Mule programming by themselves. When we are ready to start, it's always better to understand the basics and feel comfortable with the Anypoint Studio IDE and build and run the program with the basic components. Perhaps many of you have written hello world programs. Still, I believe giving basic details is always helpful to the MuleSoft community. I hope beginners will find this useful.

1. Create a new project as shown in the below screenshot. Right click on the left pane of Project Explorer and click on the MuleProject.

2. After clicking on the MuleProject, the below screen will be shown. Please make sure all the red circled sections are filled up.

3. Next, go through the folders created in the left pane. src/main/mule, src/main/java, src/main/resources,  src/test/java, src/test/munit, /src/test/resources,  and other folders are added to the project. 

Click on the helloworld1.xml file. on the right-hand side. You will notice a Mule Palette in which you will be able to view the components provided by MuleSoft.

4. Drag and drop the Listener component, Set Payload components. After that, click on the "+" icon in "Listener"  properties.

5. Next, fill up the Host and Port fields as shown in the below screen.

6. Next, click on "Set Payload." After that, you can view the properties section as mentioned in the below screen. Fill up the details as shown:

7. Right click on the project window and run the project.

8. Verify the XML equivalent code of the project.

9. Run the localhost:8087 in the browser.

Conclusion

As it is a basic hello world program, you can start modifying the content of the Set Payload component and run the program once again.