Development Process

Flink application development process

The following figure shows the development process.

Figure 1 Development process

**Table 1** Flink application development process
Step	Description	Reference
Understand basic concepts	Before application development, you need to understand basic concepts of Flink.	Basic Concepts
Prepare the development and running environment	Flink applications can be developed in Scala or Java. Use IntelliJ IDEA to configure development environments in different languages according to the guide. The Flink operating environment is a Flink client. Install and configure the client according to the guide.	Preparing the Development Environment Preparing the Configuration Files for Connecting to the Cluster
Create a project	Flink provides sample projects. You can import a sample project to learn the application. You can also create a Flink project according to the guide.	Configuring and Importing Sample Projects Creating a Project (Optional)
Prepare for security authentication	If a security cluster is used, the authentication is required.	Preparing for Security Authentication
Use development projects based on scenarios	Scala and Java sample projects are provided to help you quickly understand APIs of Flink components.	Developing an Application
Compile and run the application	You can compile the developed application and deliver it for running based on the reference.	Compiling and Running the Application
View application running results	Application running results are stored in a path specified by you. You can also view the running status on the UI.	Viewing the Debugging Result
Tune the application	Tune the application to meet certain service requirements. After the application tuning is complete, the application needs to be compiled and run again.	"Flink Performance Tuning" in the Component Operation Guide