Apache is a web-based platform that can be accessed by a user using a web interface. The NiFi UI is very interactive and provides a wide variety of information about NiFi. Once the NiFi has been started successfully, UI will bring you up to speed on how to create and monitor the dataflows. Users can drag and drop components in NiFi.
As shown in the image below, a user can access information about the following attributes −
- Active Threads
- Total queued data
- Transmitting Remote Process Groups
- Not Transmitting Remote Process Groups
- Running Components
- Stopped Components
- Invalid Components
- Disabled Components
- Up to date Versioned Process Groups
- Locally modified Versioned Process Groups
- Stale Versioned Process Groups
- Locally modified and Stale Versioned Process Groups
- Sync failure Versioned Process Groups
As shown in the image below, the user interface of Apache NiFi is as follows:
Apache NiFi UI Components
There are following components of Apache NiFi, which are listed under the component section of the toolbar -
Processors
Processors are basic blocks that are used for creating a data flow. Apache NiFi has several processors, where each processor has different functionality. Users can drag and drop the processor icon on the canvas to add the processor and then select the desired processor to create the dataflow.
Drag the process icon on the canvas that will open an Add Processor window. Choose the desired processor you needed for the data flow in Apache NiFi.
To know more about the processor, right-click on it and go to Usage. This will bring up the documentation for the processor. It provides information like what a processor does, properties that need to be configured, and the relationship with the processor.
Input Port
An input port is used for getting data from the processor, which is not present in that process group. The input port can be dragged on the canvas by clicking on the icon given below.
To add an input port to any data flow, drag the icon onto the canvas.
After dragging the icon onto the canvas, NiFi asks you to enter the name for the input port. Provide the name of the input port and click on the Add button.
