Development Workflow

The following figure shows the UDF development workflow.

Figure 1 UDF development workflow

Table 1 details the procedure.

**Table 1** UDF development procedure
Action	Description	See Also
Environment setup	Set up the development and operating environments required for UDF development, execution, and verification.	Development Preparation
Project creation	Create a UDF project.	Project Creation
Development process	Inherit the MetaFlowFunc base class of the meta_flow_func.h file, and rewrite the Init() and Proc() functions. Implement the compute logic of the UDF.	Development Process (Calling the MetaFlowFunc Class)
Project build	Build the user-defined function .cpp file into a .so file.	Project Build
Graph construction by using DataFlow APIs	Use DataFlow APIs to construct and execute a graph.	Graph Construction by Using DataFlow APIs
System testing (ST)	Perform ST to test the UDF functionality in real-device environment.	Testing

Parent topic: UDF Development