Adding complex logic into a flow using tJavaRow

The tJavaRow component allows Java logic to be performed for every record within a flow.

Getting ready

Open the job jo_cook_ch05_0020_tJavaRow.

How to do it…

1. Add the tJavaRow and tLogRow components.

2. Link the flows as shown in the following screenshot:

   

3. Open the schema and you will see that there are no fields in the output. Highlight name, dateOfBirth, and age, and click on the single arrow.

4. Use the + button to add new columns cleansedName (String) and rowCount (Integer), so that the schema looks like the following:

   

5. Close the schema by pressing ok and then press the Generate code button in the main tJavaRow screen. The generated code will be as follows:

   //Code generated according to input schema and output schema
   output_row.name = input_row.name;
   output_row.dateOfBirth = input_row.dateOfBirth;
   output_row.age = input_row.timestamp;
   output_row.cleanedName = input_row.age;
   output_row.rowCount = input_row.age; 

6. Change the row output_row.age = input_row.timestamp...