How to create your first Mule 4 Application?
Are you new to Mulesoft? You are here in the right place if you want to start developing the Mule applications. Use the below steps to start creating an application in Mule 4 AnyPoint Studio.
If you have not completed the MuleSoft Developer Certification, Read our article on MuleSoft Certified Developer Level 1 Tips
1) Under src/main/mule , create a new Mule configuration file with name basics.xml
2) Select HTTP module in the mule palette, drag, and drop Http Listener Endpoint.
You will see that Connector Configuration is showing an error.
Click on “+” and configure a new HTTP Listener Configuration. Give the Port number as 8081. Don't give any base path as of now.
Switch to XML mode and observe that the following line is outside the <flow> tag.
This is a global element that can be referred from any flow
Again double click on the HTTP component and configure the path (under Basic settings) as “ /hello”
3) Drag SetPayload transformer after HTTP Listener. Set Value as #[‘Hello World’]
4) Drag a Logger after SetPayload and set Message as #[ attributes.queryParams.name]
5) Run the application and give a request to the following URL in the browser
http://localhost:8081/hello?name=Uday
Observe the logs and see the name printed.
6) Now change the value for Set Payload to print Hello + query parameter name as shown below:
'Hello' ++ attributes.queryParams.name
Run the application and give the request to http://localhost:8081/hello?name=Uday
Did u get the response?
Now change the value for SetPayload as below and observe the response.
'Hello' ++ attributes.queryParams.name as String
7) Now change the path for Http Listener as /hello/{city}
Can you change the value for SetPayload to concatenate the value passed for city?
Hint : 'Hello' ++ attributes.queryParams.name as String ++ 'city : '++ attributes.uriParams.city
8) We want to set a variable in the MuleEvent
Now Drag Set Variable transformer and configure a variable with name city and set its values as
attributes.uriParams.city
9) In the Logger, change the value to log the variable “city”
Run the application and give the request to http://localhost:8081/hello/Delhi?name=Uday
Comment here if you are facing any issues while creating the application. Also, let us know if you want us to write an article on the new topic.
1) Under src/main/mule , create a new Mule configuration file with name basics.xml
2) Select HTTP module in the mule palette, drag, and drop Http Listener Endpoint.
You will see that Connector Configuration is showing an error.
Click on “+” and configure a new HTTP Listener Configuration. Give the Port number as 8081. Don't give any base path as of now.
Switch to XML mode and observe that the following line is outside the <flow> tag.
<http:listener-config name="HTTP_Listener_config" doc:name="HTTP Listener config" doc:id="3068cd45-c638-430b-89e6-a512d3eb4f8a" >
<http:listener-connection host="0.0.0.0" port="8081" />
</http:listener-config>This is a global element that can be referred from any flow
Again double click on the HTTP component and configure the path (under Basic settings) as “ /hello”
3) Drag SetPayload transformer after HTTP Listener. Set Value as #[‘Hello World’]
4) Drag a Logger after SetPayload and set Message as #[ attributes.queryParams.name]
5) Run the application and give a request to the following URL in the browser
http://localhost:8081/hello?name=Uday
Observe the logs and see the name printed.
6) Now change the value for Set Payload to print Hello + query parameter name as shown below:
'Hello' ++ attributes.queryParams.name
Run the application and give the request to http://localhost:8081/hello?name=Uday
Did u get the response?
Now change the value for SetPayload as below and observe the response.
'Hello' ++ attributes.queryParams.name as String
7) Now change the path for Http Listener as /hello/{city}
Can you change the value for SetPayload to concatenate the value passed for city?
Hint : 'Hello' ++ attributes.queryParams.name as String ++ 'city : '++ attributes.uriParams.city
8) We want to set a variable in the MuleEvent
Now Drag Set Variable transformer and configure a variable with name city and set its values as
attributes.uriParams.city
9) In the Logger, change the value to log the variable “city”
Run the application and give the request to http://localhost:8081/hello/Delhi?name=Uday
Comment here if you are facing any issues while creating the application. Also, let us know if you want us to write an article on the new topic.
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