Spring Boot is a popular Java-based framework used for creating microservices. Apache NiFi is a powerful dataflow tool that can be used to process and route data.
In this post, we'll show how to use Spring Boot with Apache NiFi. We'll cover the following topics:
The first thing we need to do is create a new Spring Boot project. We can use the Spring Initializr to generate a project with the necessary dependencies.
For this example, we'll need the following dependencies:
Once we have the project set up, we can start configuring Apache NiFi.
Apache NiFi needs to be configured to use the Spring Boot service we'll be creating. We'll need to add the following to the NiFi configuration:
We can use the NiFi GUI to configure these settings. First, we'll add the Processor:
Next, we'll add the Connection Pool:
Finally, we'll add the Controller Service:
Now that we have Apache NiFi configured, we can create the Spring Boot service. The service will be a simple web application that exposes a REST endpoint.
The endpoint will take a JSON payload and return a response. The response will be the same JSON payload with a generated ID.
Here's the code for the service:
@RestController
public class DataController {
@PostMapping("/data")
public ResponseEntity<String> data(@RequestBody String data) {
// Generate ID
String id = UUID.randomUUID().toString();
// Return response
return ResponseEntity.ok().body(id);
}
}
Now that we have the service up and running, we can test the dataflow. We'll use the NiFi GUI to send a JSON payload to the endpoint.
First, we'll create a new FlowFile:
Next, we'll add the JSON payload:
Finally, we'll trigger the Processor and check the response:
As we can see, the response contains the generated ID.
In this post, we've shown how to use Spring Boot with Apache NiFi. We've set up a simple dataflow that invokes a Spring Boot service and returns a response.
If you're interested in learning more about NiFi, be sure to check out the official documentation.